SIMCom SIM7672X Series Hardware Design Instructions
- June 28, 2024
- SIMcom
Table of Contents
- SIMCom SIM7672X Series Hardware Design
- Specifications
- Product Usage Instructions
- FAQs
- Introduction
- Functional Overview
- Package Information
- Interface Application
- RF Specifications
- Electrical Specifications
- SMT Production Guide
- Appendix
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
SIMCom SIM7672X Series Hardware Design
Specifications
- Product Name: SIM7672X Series Hardware Design LTE Module
- Manufacturer: SIMCom Wireless Solutions Limited
- Version: V1.02
- Date: 2023-07-27
- Headquarters: Building 3, No. 289 Linhong Road, Changning District, Shanghai P.R. China
- Technical Support Tel: +86 21 31575100
- Email: support@simcom.com
- Website: www.simcom.com
Product Usage Instructions
Chapter 1: Introduction
The SIM7672X Series Hardware Design LTE Module is designed for wireless communication solutions.
Chapter 2: Features
The module supports wakeup function for certain PINs and includes an always-on GPIO interface for enhanced functionality.
Chapter 3: GNSS Standalone Mode
The module includes an updated GNSS standalone mode reference design for improved positioning capabilities.
Chapter 4: Band Information
The band information has been updated to ensure compatibility with various networks.
Chapter 5: Power Consumption
The current consumption details have been updated for optimized power management. The module also supports Power Saving Mode (PSM) for efficient operation.
Chapter 6: Antenna and Radiation Guidelines
Ensure the antenna is installed with a minimum distance of 20cm from the body to comply with FCC radiation exposure limits. The device should not be co- located with other transmitters or antennas.
FAQs
- Q: What are the key features of the SIM7672X Series Hardware Design LTE Module?
- A: The module supports wakeup function on specific PINs, includes an always-on GPIO interface, updated GNSS standalone mode, optimized power consumption details, and complies with FCC radiation exposure limits.
- Q: How can I report documentation errors or seek technical support?
- A: You can report documentation errors or seek technical support by visiting the official website at www.simcom.com/ask or by emailing support@simcom.com.
SIM7672X Series Hardware Design
LTE Module
SIMCom Wireless Solutions Limited
SIMCom Headquarters Building, Building 3, No. 289 Linhong Road, Changning
District, Shanghai P.R. China Tel: 86-21-31575100 support@simcom.com
www.simcom.com
SIM7672X Series Hardware Design_V1.02
Document Title: Version: Date: Status:
SIM7672X Series Hardware Design V1.02 2023-07-27 Released
GENERAL NOTES
SIMCOM OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS, TO SUPPORT
APPLICATION AND ENGINEERING EFFORTS THAT USE THE PRODUCTS DESIGNED BY SIMCOM.
THE INFORMATION PROVIDED IS BASED UPON REQUIREMENTS SPECIFICALLY PROVIDED TO
SIMCOM BY THE CUSTOMERS. SIMCOM HAS NOT UNDERTAKEN ANY INDEPENDENT SEARCH FOR
ADDITIONAL RELEVANT INFORMATION, INCLUDING ANY INFORMATION THAT MAY BE IN THE
CUSTOMER’S POSSESSION. FURTHERMORE, SYSTEM VALIDATION OF THIS PRODUCT DESIGNED
BY SIMCOM WITHIN A LARGER ELECTRONIC SYSTEM REMAINS THE RESPONSIBILITY OF THE
CUSTOMER OR THE CUSTOMER’S SYSTEM INTEGRATOR. ALL SPECIFICATIONS SUPPLIED
HEREIN ARE SUBJECT TO CHANGE.
COPYRIGHT
THIS DOCUMENT CONTAINS PROPRIETARY TECHNICAL INFORMATION WHICH IS THE PROPERTY
OF SIMCOM WIRELESS SOLUTIONS LIMITED COPYING, TO OTHERS AND USING THIS
DOCUMENT, ARE FORBIDDEN WITHOUT EXPRESS AUTHORITY BY SIMCOM. OFFENDERS ARE
LIABLE TO THE PAYMENT OF INDEMNIFICATIONS. ALL RIGHTS RESERVED BY SIMCOM IN
THE PROPRIETARY TECHNICAL INFORMATION , INCLUDING BUT NOT LIMITED TO
REGISTRATION GRANTING OF A PATENT , A UTILITY MODEL OR DESIGN. ALL
SPECIFICATION SUPPLIED HEREIN ARE SUBJECT TO CHANGE WITHOUT NOTICE AT ANY
TIME.
SIMCom Wireless Solutions Limited SIMCom Headquarters Building, Building 3,
No. 289 Linhong Road, Changning District, Shanghai P.R. China Tel: +86 21
31575100 Email: simcom@simcom.com
For more information, please visit:
https://www.simcom.com/download/list-863-en.html
For technical support, or to report documentation errors, please visit:
https://www.simcom.com/ask/or email to:
support@simcom.com
Copyright © 2023 SIMCom Wireless Solutions Limited All Rights Reserved.
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SIM7672X Series Hardware Design_V1.02
Version History
Date
Version
2023-02-28 1.00
2023-05-12 1.01
2023-07-27 1.02
Description of change
Author
Han.Gao
Jiahao.Chen
Initial
Meihao.Li
Xiaomin.Luo
Tianbao.Yi
Update the band information (Chapter1.1, Chapter4) Update the current consumption (Chapter5.4) Update the PIN Assignment Overview (Chapter2.1)
Boru.Zhou Xiaomin.Luo
Add the information about the PINs which supported
wakeup function.(Chapter 2.1, Chapter 2.2)
Add the information about always on GPIO
interface.(Chapter 2.1, Chapter 2.2)
Boru.Zhou
Add PSM information. (Chapter 5.3.4)
Update GNSS standalone mode reference design.
(Chapter 3.10)
Federal Communication Commission Interference Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:
Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: Any changes or modifications not expressly approved by the party
responsible for compliance could
void the user’s authority to operate this equipment.
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SIM7672X Series Hardware Design_V1.02
transmitter.
-located or operating in conjunction with any other antenna or
Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.
This device is intended only for OEM integrators under the following conditions: 1) The antenna must be installed such that 20 cm is maintained between the antenna and users, and the maximum antenna gain allowed for use with this device is 2.23 dBi. 2) The transmitter module may not be co-located with any other transmitter or antenna.
As long as 2 conditions above are met, further transmitter test will not be
required. However, the OEM integrator is still responsible for testing their
end-product for any additional compliance requirements required with this
module installed
IMPORTANT NOTE: In the event that these conditions can not be met (for example
certain laptop configurations or co-location with another transmitter), then
the FCC authorization is no longer considered valid and the FCC ID can not be
used on the final product. In these circumstances, the OEM integrator will be
responsible for re-evaluating the end product (including the transmitter) and
obtaining a separate FCC authorization.
End Product Labeling This transmitter module is authorized only for use in
device where the antenna may be installed such that 20 cm may be maintained
between the antenna and users. The final end product must be labeled in a
visible area with the following: “Contains FCC ID: 2AJYU-8XS0001”. The
grantee’s FCC ID can be used only when all FCC compliance requirements are
met.
Manual Information To the End User The OEM integrator has to be aware not to
provide information to the end user regarding how to install or remove this RF
module in the user’s manual of the end product which integrates this module.
The end user manual shall include all required regulatory information/warning
as show in this manual.
SIM7672X Series Hardware Design_V1.02
Introduction
This document describes the electronic specifications, RF specifications,
interfaces, mechanical characteristics, and test results of the SIM7672X
Series module. With the help of this document, customers can quickly
understand SIM7672X Series module.
Associated with other software application notes and user guides, customers
can use SIM7672X Series to design and develop applications easily. SIMCom
provides a set of evaluation boards to facilitate test and development of
SIM7672X module. The evaluation board tools include an EVB board, a USB cable,
an antenna, a GNSS active antenna and other peripherals.
Documentation Overview
The documents listed in Table 1 primarily cover the module’s technical information. To thoroughly understand the device and its application, it is necessary to study all relevant documents.
Table 1: SIM7672X Series Documents Overview
No. Document
SIM7672X_Series_Hardware_Design_V1.02 1
(This document)
2
SIMCom_SIM767XX Series_Reference_Design_20230814
3
8XS000-SIM767XX-TE_V1.02_DL&PCB
4
SIMCOM_EVB_DL&PCB
5
MOD_SIM767XX_124
6
SIM7672X & SIM7652X Series AT_Command
_Manual_V1.00
7
Module Secondary SMT Process User Guide_V1.01
8
SIM767XX_TE kit_User Guide_V1.00
Description
Mainly introducing interface functions, recommend circuit, PCB layout
guideline, packaging and other hardware components, as well as the use of AT
commands Reference circuit applications SIM767XX TE SCH&PCB PDF Document
SIMCOM_EVB SCH&PCB PDF Document Reference Package (Pads)
AT Command Manual
Module secondary SMT Guidelines The use of TE board, forced download, startup,
reset, and the location of other measurement points, as well as the use method
in conjunction with EVB
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SIM7672X Series Hardware Design_V1.02
SIM767XX&SIM7652X_Series_CAT1_Module_Schematic&Lay SIM7672X peripheral circuit
9
out_Checklist_V1.00
schematic and PCB checklist
NOTE
This current revision is an early release to support initial product
developers. The content is subject to change without advance notice.
Product Outline
The module supports LTE-TDD and LTE-FDD. The supported radio frequency bands are described in the following table.
Table 2: Module frequency bands
Standard
LTE-FDD LTE-TDD
Frequency
LTE-FDD B1 LTE-FDD B2 LTE-FDD B3 LTE-FDD B4 LTE-FDD B5 LTE-FDD B7 LTE-FDD B8
LTE-FDD B12 LTE-FDD B13 LTE-FDD B14 LTE-FDD B18 LTE-FDD B19 LTE-FDD B20 LTE-
FDD B25 LTE-FDD B26 LTE-FDD B28 LTE-FDD B66 LTE-FDD B71 LTE TDD B34 LTE TDD
B38 LTE TDD B39
SIM7672E
SIM7672NA
SIM7672S
SIM7672G
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SIM7672X Series Hardware Design_V1.02
Category GNSS
LTE TDD B40 LTE TDD B41
CAT1 Optional
CAT1 Optional
CAT1 Optional
CAT1 Optional
With a small physical dimension of 24242.4mm, the module can meet almost any space requirement in customers’ applications, such as smart phone, PDA, industrial handhold, machine-to-machine and vehicle application, etc. The module provides 124 pins, including 80 LCC pins in the outer ring and 44 LGA pins in the inner ring. This document will introduce all the functional pins.
Hardware Interface Overview
The interfaces are described in detail in the following chapters including:
Power supply USB 2.0 interface Three UART interfaces, one full function serial
port, one ordinary serial port and one debug serial port One USIM interface
PCM interface I2C interface Two General ADC interfaces General input and
output interfaces (GPIOs) Two ANT tuner control interfaces (GRFCs) USB_BOOT
interface Module operation status indication interface Network status
indication interface MAIN_UART_WAKEUP interface GNSS interfaces Antenna
interfaces
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SIM7672X Series Hardware Design_V1.02
Functional Overview
Table 3: General features
Feature
Power supply
Power saving
Radio frequency bands Transmitting power Data Transmission Throughput Antenna
SMS USIM interface USIM application toolkit Phonebook management Audio feature
UART interface
USB
Implementation
VBAT: 3.4V~4.2V, Recommended VBAT: 3.8V Idle mode Typical: 4.13mA Current in
Sleep mode@DRX=0.32S typical: 1.5mA (GNSS off) Current in Sleep mode@DRX=0.64S
typical: 729uA (GNSS off) Current in Sleep mode@DRX=1.28S typical: 477uA (GNSS
off) Current in PSM mode: 10uA Please refer to the table 55 Please refer to
the table 2 LTE power level: 3 (23dBm±2.7dB) TDD/FDD-LTE category 1 : 10 Mbps
(DL), 5 Mbps (UL) LTE antenna interface GNSS antenna interface MT, MO, CB,
Text, PDU mode Short Message (SMS) storage device: USIM Card, CB does not
support saving in SIM Card Support CS domain SMS Support identity card: 1.8V/
3V Support SAT class 3, GSM 11.14 Release 98 Support USAT Support phonebook
types: SM/FD/ON/AP/SDN Support PCM interface Full function serial port Baud
rate support from 600bps to 921600bps AT command and data can be sent through
serial port Support RTS/CTS hardware flow control Support serial port
multiplexing function conforming to GSM 07.10 protocol Debug serial port
Support debug function AUX_UART serial port Support GNSS communication
function Compliant with USB 2.0 specification and supports slave mode but not
master mode. This interface can be used for AT command sending, data
transmission, GNSS NMEA output, software debugging and
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Firmware upgrade Physical characteristics
Temperature range
SIM7672X Series Hardware Design_V1.02
upgrading. Firmware upgrade over USB interface or MAIN_UART interface Size:
24242.4mm Weight: 2.83g (Typical) Normal operation temperature: -30°C to
+75°C Extended operation temperature: -40°C to +85°C* Storage temperature:
-45°C to +90°C
NOTE
When the module is within the extended operation temperature range, module is
able to establish and maintain data transmission, SMS, etc. The performance
may deviate slightly from the 3GPP specifications, but will meet 3GPP
specifications again when the temperature returns to normal operating
temperature levels. It is strongly recommended that customers take heat
dissipation measures to ensure that the normal operating temperature of the
module can’t be exceeded.
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SIM7672X Series Hardware Design_V1.02
Package Information
Pin Assignment Overview
The following figure is a top view of the pin assignment of the module for
SIM7672X.
SIM7672X PIN MAP
(TOP VIEW)
100 1PPS 99 NC 98 GNSS_PWRCTL 68 GPIO12 67 GPIO11
66 STATUS
65 GND 64 GND 63 GND 62 GND 61 GND 60 RF_ANT 59 GND 58 GND 57 VBAT 56 VBAT 55
VBAT 54 GND 53 GPIO10
52 NETLIGHT
97 GNSS_VDD 96 GNSS_RXD 95 GNSS_TXD
PWRKEY 1 GND 2
- MAIN_UART_DT 3 * MAIN_UART_RI 4
MAIN_UART_DCD 5 USB_BOOT 6
MAIN_UART_CTS 7 MAIN_UART_RTS 8 MAIN_UART_TXD 9 MAIN_UART_RXD 10
PCM_CLK 11 PCM_SYNC 12
PCM_DIN 13 PCM_DOUT 14
VDD_EXT 15 RESET 16 GND 17
124 NC 123 NC 122 NC 121 NC 120 NC 119 NC
NC 101 NC 102 NC 103 NC 104 NC 105 NC 106
69
84
83
82
81
70
80
88
71
85
87
79
86
72
78
73
74
75
76
77
118 NC 117 NC 116 GNSS_VBKP 115 GNSS_DEBUG_TX 114 GNSS_RST_N 113 NC
69~88 GND
51 ADC2 50 AUX_UART_TXD 49 AUX_UART_RXD 48 GPIO9 47 GPIO8 46 GND 45 GND 44 GPIO7 43 ANT_CTRL2 42 ANT_CTRL1 41 MAIN_UART_WAKEUP 40 GNSS_VDD_EN 39 GND 38 I2C_SCL 37 I2C_SDA 36 GPIO6 35 GPIO5
NC 107 NC 108 NC 109 NC 110 GNSS_DEBUG_RX 111 NC 112
GND 89 GNSS_ANT 90
GND 91 GND 18 GPIO1 19
- GPIO2 20 GPIO3 21 DEBUG_UART_RX 22 DEBUG_UART_TX 23
VBUS 24 ADC1 25 GPIO4 26 USB_DP 27 USB_DN 28 GND 29 SIM_VDD 30 SIM_DATA 31 SIM_CLK 32 SIM_RST 33 SIM_DET 34 GND 92
NC 93 GND 94
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SIM Card GND
GPIO Power
UART GNSS
PCM
The PINs with
can not be pulled
down before the module powered up.
The PINs with
support wakeup
USB
function.
The PINs with * will not power
down after entered sleep mode.
Figure 1: Pin assignment overview for SIM7672X
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Table 4: Pin Description
PIN NO
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55
57 59 61 63 65 67 69 71 73
PIN NAME
PWRKEY MAIN_UART_DTR * MAIN_UART_DCD MAIN_UART_CTS MAIN_UART_TXD PCM_CLK
PCM_DIN VDD _EXT GND GPIO1 GPIO3 DEBUG_UART_TX ADC1 USB_DP GND SIM_DATA
SIM_RST GPIO5 I2C_SDA GND MAIN_UART_WAKEUP NC GND GPIO8 AUX_UART_RXD ADC2
GPIO10 VBAT VBAT GND GND GND GND GPIO11 GND GND GND
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SIM7672X Series Hardware Design_V1.02
PIN NO
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54
56 58 60 62 64 66 68 70 72 74
PIN NAME
GND MAIN_UART_RI USB_BOOT MAIN_UART_RTS RXD PCM_SYNC PCM_DOUT RESET GND
GPIO2 DEBUG_UART_RX VBUS GPIO4 USB_DN SIM_VDD SIM_CLK SIM_DET GPIO6 I2C_SCL
GNSS_VDD_EN NC GPIO7 GND GPIO9 AUX_UART_TXD NETLIGHT GND VBAT GND RF_ANT GND
GND STATUS GPIO12 GND GND GND
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75
GND
77
GND
79
GND
81
GND
83
GND
85
GND
87
GND
89
GND
91
GND
93
NC
95
GNSS_TXD
97
GNSS_VDD
99
NC
101
NC
103
NC
105
NC
107
NC
109
NC
111
GNSS_DEBUG_RX
113
NC
115
GNSS_DEBUG_TX
117
NC
119
NC
121
NC
123
NC
SIM7672X Series Hardware Design_V1.02
76
GND
78
GND
80
GND
82
GND
84
GND
86
GND
88
GND
90
GNSS_ANT
92
GND
94
GND
96
GNSS_RXD
98
GNSS_PWRCTL
100
1PPS
102
NC
104
NC
106
NC
108
NC
110
NC
112
NC
114
GNSS_RST_N
116
GNSS_VBKP
118
NC
120
NC
122
NC
124
NC
NOTE
” indicates that the pin cannot be pulled down before the module powered up,
otherwise it will affect the normal start-up of the module. ” indicates that
the pins support wakeup function. ‘ * ‘ indicates that these interfaces are
always on GPIO, they can remain the previous status when the module enters
sleep mode. GNSS_VDD_EN (PIN 40) only can be used at standalone mode!!! NC:
NOT CONNECT. Do not connect them to GND.
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Pin Description
SIM7672X Series Hardware Design_V1.02
Table 5: Pin parameter abbreviation
Pin type
PI PO AI AIO I/O DI DO DOH DOL PU PD OD
Description
Power input Power output Analog input Analog input/output Bidirectional input
/output Digital input Digital output Digital output with high level Digital
output with low level Pull up Pull down Open Drain
Table 6: 1.8V IO parameters definition
Power Domain
1.8V
Parameter
VIH VIL Rpu Rpd IIL VOH VOL
IOL
IOH
Description
Min
High level input Low level input Pull up resistor Pull down resistor Input leakage current Output level range Output low range Maximum current driving capacity at low level output Maximum current driving capacity at high level output Vpad=VCC-0.2V
VCC 0.7 –
117K 91 K -10uA VCC 0.8
–
–
–
Typ.
1.8V 0V
–
–
–
Max
VCC 0.2 331 K 291 K
10uA –
VCC0.15
–
–
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SIM7672X Series Hardware Design_V1.02
Table 7: Pin description
Pin name Power supply
VBAT VDD_EXT
GND
System Control
PWRKEY RESET
USIM interface
SIM_DATA SIM_RST
Pin No.
Pin parameter
Power domain
Type
Description
55,56, –
57
15
–
2,17,18,
29,39,
45,46,
54,58,
59,61,
62,63,
64,65,
69,70,
71,72,
73,74,
–
75,76,
77,78,
79,80,
81,82,
83,84,
85,86,
87,88,
89,91,
92,94
Module input voltage ranges from 3.4V to PI 4.2V, typical values is 3.8V. 1.8V
power output, PO output current up to 50 mA.
– Ground
Power ON/OFF input,
1
–
DI,PU
active low.
System reset control
16
–
DI,PU
input, active low.
31
1.8/3.0V I/O,PU SIM data signal.
33
1.8/3.0V I/O,PU SIM RST signal reset
Note
Default on. It can provide 1V8 power supply for GNSS. If unused, keep it open.
This pin has been pull-up with 4.7K resistor to SIM_VDD internally.
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SIM7672X Series Hardware Design_V1.02
SIM_CLK SIM_VDD
32
1.8/3.0V
30
1.8/3.0V
SIM_DET
34
1.8V
USB interface
VBUS
24
–
USB_DN
28
–
USB_DP
27
–
Full function UART interface
MAIN_UART_RTS
8
1.8V
MAIN_UART_CTS
7
1.8V
MAIN_UART_RXD
10
1.8V
MAIN_UART_TXD
9
1.8V
MAIN_UART_RI *
4
1.8V
MAIN_UART_DCD
5
1.8V
MAIN_UART_DTR
3
1.8V
Debug_UART
DEBUG_UART_TX 23
1.8V
DEBUG_UART_RX 22
1.8V
AUX_UART
AUX_UART_TXD
50
AUX_UART_RXD 49
I2C interface
I2C_SCL
38
1.8V 1.8V
1.8V
I/O,PU
output. SIM CLK signal clock output.
SIM card power supply PO
output.
I/O,PU SIM card insert detect.
Supports 1.8V/3.0V output according to the card type, its output current is up to 30mA. It can be set to high/low active with the AT command, refer to Document [25]
Valid USB detection input. Active high, PI Vmin=3.6V, Vmax=5.2V, Vnorm=5V Negative electrode of AIO the differential, bidirectional USB signal. Positive electrode of the AIO differential, bidirectional USB signal.
DI RTS input DO CTS output DI Data input DO Data output DO Ringing indicator
DO Carrier detection
DI DTE Ready
If unused, keep it open.
DOH DI
Debug UART, the boot log will be output during boot up.
Default used as debug port.
DO Data output DI Data input
Two-wire serial port
OD I2C clock output
If unused, keep it
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I2C_SDA
37
PCM interface
PCM_CLK
11
PCM_SYNC
12
PCM_DIN
13
PCM_DOUT
14
GPIO
GPIO1
19
GPIO2 *
20
GPIO3
21
GPIO4
26
GPIO5
35
GPIO6
36
GPIO7
44
GPIO8
47
GPIO9
48
GPIO10
53
GPIO11
67
GPIO12
68
GNSS interface
GNSS_PWRCTL
98
GNSS_VDD_EN
40
GNSS_VDD
97
GNSS_VBKP
116
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SIM7672X Series Hardware Design_V1.02
1.8V
OD I2C data I/O
open. Need pull up to VDD_1V8 externally.
1.8V 1.8V 1.8V 1.8V
I/O,PD I/O,PD DI,PD DO,PD
PCM clock PCM frame synchronization PCM data input
PCM data output
If unused, keep it open.
1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V
IO,PU General purpose I/O IO,PD General purpose I/O IO,PU General purpose I/O IO,PD General purpose I/O IO,PU General purpose I/O IO,PU General purpose I/O IO,PU General purpose I/O IO,PU General purpose I/O IO,PD General purpose I/O IO,PU General purpose I/O IO,PU General purpose I/O IO,PU General purpose I/O
If unused, keep it open. If unused, keep it open. If unused, keep it open. If unused, keep it open. If unused, keep it open. If unused, keep it open. If unused, keep it open. If unused, keep it open. If unused, keep it open. If unused, keep it open. If unused, keep it open. If unused, keep it open.
1.8V 1.8V
–
The enable control PIN
DI of GNSS Vcore power Active high.
supply.
The enable control PIN It only can be used at
DI of GNSS system power standalone mode.
supply.
The power input for PI
GNSS.
Module VDD_EXT (PIN 15) can be used for this power supply
GNSS VRTC power PI
input, input voltage
If unused, keep it open.
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1PPS
100
GNSS_RXD
96
GNSS_TXD
95
GNSS_RST_N
114
GNSS_DEBUG_TX 115
GNSS_DEBUG_RX 111
ANT interface
RF_ANT
60
GNSS_ANT
90
Other pins
ADC1
25
ADC2
51
NETLIGHT *
52
STATUS *
66
USB_BOOT
6
ANT_CTRL1
42
ANT_CTRL2
43
MAIN_UART_WAK
EUP
41
SIM7672X Series Hardware Design_V1.02
1.8V
1.8V
1.8V –
1.8V 1.8V
2.0V~3.6V, recommend
2.8V power supply.
DO 1PPS signal output
If unused, keep it open.
Connect to MCU UART_TXD;
DI GNSS UART RX
Or use 1K resistor in series in module
AUX_UART_TXD (PIN 50).
Connect to MCU
UART_RXD;
DO GNSS UART TX
Or use 1K resistor in series in module
AUX_UART_RXD (PIN 49).
AI GNSS RST interface
DO GNSS debug output
DI GNSS debug input
–
AIO Main antenna
–
AIO GNSS antenna
1.8V 1.8V 1.8V
1.8V
AI
If unused, keep it General Purpose ADC1
open.
If unused, keep it AI General Purpose ADC2
open.
DO Network registration status indicator (LED).
Module status indicator DO
(LED).
Firmware download
guide control input.
Please reserve 2 test
When pull-down to
points for debug.
DI GND and press
Do not pull down
PWRKEY, module will USB_BOOT during
access in USB
normal power on!
download mode.
DO FEMIO for tuner switch
DO FEMIO for tuner switch
DI
MAIN_UART_RXD wake-up pin.
Connect it to MAIN_UART_RXD externally if use this function.
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SIM7672X Series Hardware Design_V1.02
NOTE
Please reserve test points for USB_BOOT, GND, DEBUG_UART_TX, GNSS_DEBUG_TX,
GNSS_DEBUG_RX, GNSS_TXD and GNSS_RXD. If there is no USB connector, please
also reserve test points for VBUS, USB_DP, and USB_DN for firmware upgrading.
” Indicates that the pin cannot be pulled down before the module powered up,
otherwise it will affect the normal start-up of the module. ” Indicates that
the pin support wakeup function. ‘ * ‘ indicates that these interfaces are
always on GPIO, they can remain the previous status when the module enters
sleep mode.
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SIM7672X Series Hardware Design_V1.02
Mechanical Information
The following figure shows the package outline drawing of SIM7672X.
Figure 2: Dimensions (Unit: mm)
NOTE
The side length dimension is 24.00±0.15mm excluding the burr area.
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SIM7672X Series Hardware Design_V1.02
Recommended PCB Footprint
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Figure 3: Footprint recommendation (Unit: mm)
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Recommend Stencil Size
Recommend stencil thickness 0.15mm.
SIM7672X Series Hardware Design_V1.02
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Figure 4: Recommend stencil dimension (Unit: mm)
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SIM7672X Series Hardware Design_V1.02
Interface Application
Power Supply
The module offers 3 power supply pins (55, 56, 57) as VBAT power input pin.
SIM7672X uses these three pins supply the internal RF and baseband circuit.
Table 8: Power interface pins definition
Pin name
VBAT GND
Pin No.
I/O Description
Note
55,56,57
PI
Module input voltage ranges from 3.4V to 4.2V, typical values is 3.8V.
–
2,17,18,29,39,45,46,54,58,59,61,62,63,64,65,69,70,71,72,73,74,75,76,77,78,79,80,81,82,
83,84,85,86,87,88,89,91,92,94
Table 9: VBAT pins electronic characteristic
Parameter
VBAT IVBAT (peak) IVBAT (average)
IVBAT (sleep)
IVBAT(PSM) IVBAT (power-off)
Description
Module supply voltage Module consumption peak current Module average
consumption current (idle mode) Current in Sleep mode@DRX=0.32S (GNSS off)
Current in Sleep mode@DRX=0.64S (GNSS off) Current in Sleep mode@DRX=1.28S
(GNSS off) Current in PSM mode Module average consumption current (off leakage
current)
Min.
3.4 –
–
Typ.
3.8 –
4.13 1.5 729 477 10
8
Max.
4.2 746
–
–
Unit
V mA mA mA uA uA uA
uA
NOTE
Test condition: VBAT power supply 3.8V, the module is tested on EVB board, and
the power input has a 100uF tantalum capacitor.
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SIM7672X Series Hardware Design_V1.02
3.1.1. Power Supply Design Guide
In the customer’s design, special attention must be paid to the design of the
power supply. If the voltage drops below 3.4V, the RF performance of the
module will be affected, the module will shut down if the voltage is too low.
It is recommended to select an LDO or DC-DC chip with an enable pin, and the
enable pin is controlled by the MCU.
NOTE
When the power supply can provide a peak current, the total capacity of the
external power supply capacitance is recommended to be no less than 100uF.
It is recommended to place four 10pF/33pF/0.1uF/1uF ceramic capacitors near VBAT to improve RF performance and system stability. At the same time, it is recommended that the VBAT layout routing width from the power supply on the PCB to the module be at least 2mm.The recommended reference design is as follows:
Module
VB AT
VB AT VB AT GND
FB
Ce Cd
Cc
10pF 33pF 0.1uF
Cb
Ca
1uF 100uF
VB AT TVS
Figure 5: Power supply application circuit
If the VBAT input contains high-frequency interference, it is recommended to
add magnetic beads for filtering. The recommended types of magnetic beads are
BLM21PG300SN1D and MPZ2012S221A.
In addition, in order to prevent the damage of SIM7672X caused by surge and
overvoltage, it is recommended to parallel one TVS on the VBAT pin of the
module.
Table 10: TVS for VBAT part number list
Manufacturer
WILL WILL WAYON WAYON
Part Number
ESD56301D05-2/TR ESD56301D04-2/TR
WS2057KP WS4.5DPHXM
VRWM
5V 4.85V
5V 4.85V
VCmax
9.5V 11V 12V 11V
www.simcom.com
PPPmax
1500W 2000W 2040W 2255W
CJmax
700pF 480pF 700pF 700pF
Package
DFN1610-2L DFN1610-2L DFN1610-2L DFN1610-2L
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SIM7672X Series Hardware Design_V1.02
NOTE
When selecting TVS by customer, it is necessary to pay attention to the
clamping voltage in the case of surge protection. The clamping voltage should
not be higher than 6V when 100V surge input.
3.1.2. Recommended Power Supply Circuit
In order to avoid damaging the module, please do not cut off the power supply
when module works normally. Only after the module is shut down by PWRKEY or AT
command, the power supply can be cut off. It is suggested that customer’s
design should have the ability to cut off the power supply for module in
abnormal state, and then switch on the power to restart the module. The
PWR_CTRL signal indicates that the module is connected to the host and can be
controlled. When the input power is greater than 9V, the DCDC chip is
recommended. When the input is less than 9V, it is recommended to use LDO
power supply. The following figure shows the DC-DC regulator reference
circuit:
DC Input FUSE
C10 5
U101
0.1uF 6
3 Vin BST LX 2
+ C101 C102
100uF 1uF
5
FR9206S9
/SHDN
FB
4
PWR_CTRL
1
GND 220pF C103
C104 C105
R103 0R
L10 1
4.7uH R10 1 120K
FB101 VBAT 270 ohm@100Mhz
22uF 22uF
R102 30K
Figure 6: Power supply reference circuit
When the VBAT power is turned off, the voltage should decrease rapidly. To
avoid voltage anomalies, when the VBAT is lower than the minimum value, it
must be pulled below 100mV for at least 1 second before the system is powered
up again.
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VBAT
SIM7672X Series Hardware Design_V1.02
Less than 100mV 1s
UART port define
undefine
define
Figure 7: Power-off and power-on restart sequence
3.1.3. Voltage Monitor
AT command AT+CBC’ can be used to monitor VBAT voltage. AT command AT+CVALARM’ can be used to set high/low voltage alarm, when the actual
voltage exceeds the preset range, a warning message will be reported through
the AT port. AT command `AT+CPMVT’ can be used to set high/low voltage power
off, when the actual voltage exceeds the preset range, the module will shut
down automatically.
NOTE
Overvoltage alarm and overvoltage shutdown are off by default. For details of
AT commands, please refer to document [1].
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Power On/ Off and Reset
SIM7672X Series Hardware Design_V1.02
3.2.1. Power on
Table 11: PWRKEY interface pin definition
Pin name Pin No.
PWRKEY 1
I/O
DI,PU
Description
Power ON/OFF input, active low.
Note
Customer can power on the module by pulling down the PWRKEY pin. It is recommended to add TVS diode near the module pin for ESD performance. The recommended circuit is as follows:
PWRKEY default high
MODULE
PWRKEY pulse 4.7K 47K
PWRKEY
Figure 8: Reference power on/off circuit
NOTE
1. It is forbidden to pull down both RESET key and PWRKEY to power on the
module at the same time. 2. If there is more than 1.3V remaining voltage
before the module VBAT is powered on, the module automatically starts when it
is powered on.
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SIM7672X Series Hardware Design_V1.02
VBAT PWRKEY
(input) S(ToAutTpUuSt)
UART
USB
Ton
Ton(status) Ton(uart) Undefined
Ton(usb) Undefined
Active Active
Figure 9: Power on sequence Table 12: Power on timing and electronic characteristic
Symbol
Ton
Ton(status) Ton(uart) Ton(usb) VIH VIL
Parameter
Min.
The time of active low-level impulse of PWRKEY pin –
to power on module
The time from power-on issue to STATUS pin output –
high level (indicating power up ready)
The time from power-on issue to UART port ready
–
The time from power-on issue to USB port ready
–
Input high level voltage on PWRKEY pin
–
Input low level voltage on PWRKEY pin
0
Typ.
50
320 55 470 2.1 0
Max.
–
0.4
Unit
ms
ms ms ms V V
3.2.2. Power off
The following methods can be used to power off the module. Power off by
pulling the PWRKEY pin down to a low level for 2.5s. Power off Module by AT
command AT+CPOF’. Over-voltage or under-voltage automatic power off, the voltage range can be set byAT+CPMVT’. Over-temperature or under-temperature
automatic power off.
It is strongly recommended that the customer use PWRKEY or `AT+CPOF’ to shut
down, and then cut off VBAT (especially when the module does not need to
work). In addition, the customer cannot shut down VBAT by disconnecting it,
which may cause damage to flash.
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SIM7672X Series Hardware Design_V1.02
NOTE
1. When the temperature exceeds the range of – 30 ~ + 75 , SIM7672X will
report warning information through AT port. When the temperature exceeds the
range of – 40 ~ + 85 , SIM7672X will shut down automatically. For a detailed
description of AT+ CPOF’ andAT+ CPMVT’, please refer to document [1]. 2.
The VBAT voltage must fall below 1.3V before power on. Otherwise, the module
will restarts automatically.
PWRKEY can be used to power off the module. For power off sequence, please see
the following figure:
PWRKEY
(input)
STATUS (output)
UART
USB
Toff-on
Toff
Ton
Toff(status)
Toff(uart) Active
Toff(usb) Active
Undifined Undifined
Figure 10: Power off timing sequence Table 13: Power off sequence parameters
Symbol
Toff Toff(status)
Toff(uart) Toff(usb) Toff-on
Parameter
Power off low level pulse width Power off time (according to status interface)
Power off time (according to UART interface) Power off time (according to USB
interface) Power off – power on buffer time
Min.
2.5 –
2
Typ.
480
2.4 690
–
Max.
–
–
Unit
s us
ms us s
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SIM7672X Series Hardware Design_V1.02
NOTE
The status pin can be used to judge whether the module is powered on or not.
When the module is powered on and initialization is completed, the status
outputs a high level, otherwise the low level will be maintained all the time.
3.2.3. Reset Function
Table 14: RESET interface pin definition
Pin name Pin No.
RESET
16
I/O
DI,PU
Description
System reset control input, active low.
Note
The module can be reset by pulling down the reset pin to a low level. The recommended circuit is showed as follows:
MODULE
RESET pulse 4.7K
Treset
47K
RESE T
Figure 11: Reference reset circuit
Table 15: RESET pin electronic characteristic
Symbol
Treset VIH VIL
Description
Min.
The active low level time impulse on RESET pin to –
reset module
Input high level voltage
–
Input low level voltage
-0.3
Typ. Max. Unit
0.5
–
s
1.2
–
V
0
0.4
V
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SIM7672X Series Hardware Design_V1.02
NOTE
It is recommended to use the reset pin only in case of emergency, such as the
module is not responding. The reset time is recommended to be 0.5s.
UART Interface
The module provides three serial ports, the main communication serial port is MAIN_UART, one ordinary serial port for GNSS communication, and the DEBUG_UART dedicate to print log.
Table 16: UART interface pins definition
Pin name
No.
Power domain
Full function UART interface
MAIN_UART_RTS
8
1.8V
MAIN_UART_CTS
7
1.8V
MAIN_UART_RXD
10
1.8V
MAIN_UART_TXD
9
1.8V
MAIN_UART_RI
4
1.8V
MAIN_UART_DCD
5
1.8V
MAIN_UART_DTR
3
1.8V
Type
DI DO DI DO DO DO DI
Debug UART
DEBUG_UART_TX
23
1.8V
DO
DEBUG_UART_RX
22
1.8V
DI
AUX_UART
AUX_UART_TXD
50
1.8V
DO
AUX_UART_RXD
49
1.8V
DI
Description
Note
RTS input CTS output Data input Data output Ringing indicator Carrier detection DTE Ready
If unused, keep it open.
Debug UART, the boot log will be output during boot up.
Default used as debug port.
Data output Data input
Two-wire serial port
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SIM7672X Series Hardware Design_V1.02
3.3.1. UART Design Guide
When customer uses full-function serial port, please refer to the following connection mode:
MODULE(DCE) Serial port
TXD RXD RTS CTS DTR DCD
RI
HOST (DTE) Serial port
TXD RXD RTS CTS DTR DCD
RING
Figure 12: Serial port connection diagram (full-function mode) When using 2-wire serial port, please refer to the following connection mode:
MODULE (DCE)
UART
TXD
RXD RTS CTS
HOST(DTE)
TXD
RXD RTS
UART
CTS
Figure 13: Serial port connection diagram (NULL mode)
The following figure shows the use of triode for level shifter circuits.
Please pay special attention to the direction of signal. The recommended
triode model is MMBT3904.
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SIM7672X Series Hardware Design_V1.02
MODULE
TXD RXD
1K~4.7K
470pF_NM 4.7K
1nF
VDD_EX T VI O_MCU
HOST
MCU_RXD MCU_TXD
1nF
4.7K 1K~4.7K
CTS RTS GPIO
VDD_EX T
GND
CTS RTS GPIO
GND
Figure 14: Triode level conversion circuit
NOTE
1. Main UART supports the following baud rates: 600, 1200, 2400, 4800, 9600,
19200, 38400, 57600, 115200, 230400 and 921600. The default baud rate is
115200bps.
2. The maximum baud rate supported by SIM7672X ordinary serial port is
921600bps. 3. The parasitic capacitance of the transistor will affect the edge
of the high-speed digital signal. It is not
recommended to use this circuit when the signal speed is higher than
115200bps.
3.3.2. RI and DTR Behavior
RI usually keeps high level output. When receiving a short message or URC
report, RI outputs a low level for 120ms (short message)/60ms (URC), and then
returns to a high-level state.
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SIM7672X Series Hardware Design_V1.02
RI High
IDLE
Low
120ms/60ms low voltage output when receiving
SMS or any URC report.
Figure 15: RI behaviour (SMS and URC report)
After setting the AT command “AT+CSCLK=1”, and then pulling up the DTR pin,
module will enter into the sleep mode from the idle mode. In sleep mode, the
UART is unavailable. When SIM7672X enters into the sleep mode, pulling down
DTR can wake up the module. After setting the AT command “AT+CSCLK=0”,
SIM7672X Series remain still when the DTR pin is pulling up.
NOTE
After the module has entered into sleep mode, customers can pull DTR down to
GND to wake up the module.
USB Interface
The module contains a USB interface, which complies with the USB2.0 specification as a peripheral, but does not support USB charging function and USB HOST mode.
USB supports high speed mode (480Mbps) and full speed mode (12Mbps), it is used for AT command communication, data transmission, GNSS NMEA output, firmware upgrade and software debugging.
It is recommended to reserve USB test points during design. If a main control chip is connected, 0R resistors must be reserved for switching external test points during design, as shown in the figure below.
Table 17: USB interface pins definition
Pin name
VBUS USB_DN USB_DP
No.
Power domain
Type Description
Note
Valid USB detection input. Active high,
24
–
PI
Vmin=3.6V, Vmax=5.2V, Vnorm=5V
Negative electrode of the differential,
28
–
AIO
bi-directional USB signal.
27
–
AIO Positive electrode of the differential, bi-
directional USB signal.
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SIM7672X Series Hardware Design_V1.02
3.4.1. USB Reference Design
The module can be used as a USB slave device. The recommended connection
circuit diagram is as follows:
The branch wiring should not exceed 2mm
Module
USB_VB US
0R_NM 0R_NM
Tes t point
USB_VB US USB_DN USB_DP GND
2.2R
2.2R
Place close to the module
Host
DD+ GND
D3 D1 D2
Figure 16: USB circuit diagram
Customers should pay attention to the selection of D3 devices. It is
recommended to choose anti-static and anti-surge two-in-one devices, and one
TVS tube can be placed, recommended model AZ9707-01F. D+/Dtrace impedance is
controlled according to 90 and covered with ground; D1/D2 select TVS tube with
capacitance value <1pf, and they should be placed near the USB connector or
test point, recommended models ESD73131CZ and ESD9L5.0ST5G.
Table 18: TVS for USB part number list
Manufacturer
WILL ON AMAZING
Part Number
ESD73131CZ-2/TR ESD9L5.0ST5G AZ9707-01F
VRWM
5V 5V 7V
VCmax
6.5V 9.8V 12.5V
CJmax
0.45pF 0.9pF 950pF
Package
DWN0603-2L SOD-923 DFN1610
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SIM7672X Series Hardware Design_V1.02
NOTE
1. The gap from other signals should keep 3 times line width. 2. Trace routes
should be away from other sensitive signals (RF, audio, and XO). 3. The
detection of USB2.0 speed is determined automatically by the USB protocol. 4.
There is no need to pull up the DP external, since it may affect the device
USB enumeration.
3.4.2. USB_BOOT Interface
The module provides one forced download boot interface `USB_BOOT’. Table 19: USB_BOOT interface pin definition
Pin name No.
USB_BOOT 6
Power domain
1.8V
Type
DI
Description
Firmware download guide control input. When pull-down to GND and press PWRKEY,
module will access in USB download mode.
Note
Please reserve 2 test points for debug. Do not pull down USB_BOOT during
normal power on!
If the module fails to boot, customers can force upgrade through the USB_BOOT port. Before the module is powered on, pull down the USB_BOOT pin to GND, then apply VBAT power to the module, and press PWRKEY to enter the download mode. After entering the download mode, release USB_BOOT and remove the pull-down.
Module
USB_BOOT
Disconnect when download start
1K
TVS
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Figure 17: Reference USB_BOOT circuit
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SIM7672X Series Hardware Design_V1.02 Customers will see the download port in the device manager port of the windows system.
Figure 18: Force-download port
NOTE
1. USB_ BOOT is the download control pin, this pin cannot be pulled down
before the normal power on. Otherwise, it will enter the download mode.
2. It is recommended to reserve test point to facilitate debugging and
upgrading.
USIM Interface
The module supports both 1.8V and 3.0V USIM cards. The interface power of the USIM card is provided by the voltage regulator inside the module.
Table 20: USIM interface pins definition
Pin name
SIM_DATA SIM_RST SIM_CLK
SIM_VDD
No.
Power domain
Type
31 1.8/3.0V I/O,PU
33 1.8/3.0V I/O,PU 32 1.8/3.0V I/O,PU
30 1.8/3.0V PO
Description
Note
SIM data signal. SIM RST signal reset output. SIM CLK signal clock output.
SIM card power supply output.
This pin has been pull-up with 4.7K resistor to SIM_VDD internally.
Supports 1.8V/3.0V output according to the card type, its output current is up
to 30mA.
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SIM7672X Series Hardware Design_V1.02
SIM_DET
34 1.8V
I/O,PU
SIM card insert detect.
Table 21: USIM electronic characteristic in 1.8V mode (SIM_VDD=1.8V)
It can be set to high/low active with the AT command, refer to document [25]
Symbol
SIM_VDD VIH VIL VOH VOL
Parameter
LDO power output voltage High-level input voltage Low-level input voltage
High-level output voltage Low-level output voltage
Min.
1.62 0.7SIM_VDD -0.3 0.8SIM_VDD –
Typ.
1.8 0 0
Max.
1.98 0.2SIM_VDD 0.15SIM_VDD
Table 22: USIM electronic characteristic in 3.0V mode (SIM_VDD=3V)
Unit
V V V V V
Symbol
SIM_VDD VIH VIL VOH VOL
Parameter
LDO power output voltage High-level input voltage Low-level input voltage
High-level output voltage Low-level output voltage
Min.
2.7 0.7SIM_VDD -0.3 0.8SIM_VDD –
Typ.
3 0 0
Max.
3.3 0.2SIM_VDD 0.15SIM_VDD
Unit
V V V V V
3.5.1. SIM Application Guide
It is recommended to use ESD protection component. Note that the USIM
peripheral circuit should be close to the USIM card socket. The following
figure shows the 6-pin SIM card holder reference circuit.
MODULE
SI M_VDD SI M_RST SI M_CLK
SI M_DATA
22 22
22
SIM Socket
VCC RST CLK
GND VP P
I/O
33pF 33pF 33pF 1uF 100nF 33pF
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Figure 19: SIM interface reference circuit
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MODULE
VDD_EX T SI M_VDD SI M_RST SI M_CLK SI M_DET
SI M_DATA
47K (NC)
SIM7672X Series Hardware Design_V1.02
22 22 22
22
SIM Socket
VCC
GND
RST
VP P
CLK
I/O
PRESENCE GND
33pF 33pF 33pF
1uF 100nF 33pF
Figure 20: SIM interface reference circuit (8PIN)
NOTE
1. SIM_DATA has been pulled up with a 4.7K resistor to SIM_VDD in module. 2.
A 100nF capacitor on SIM_VDD is used to reduce interference. 3. Using
“AT+UIMHOTSWAPON=0 or 1” to enable SIM card hot swap function. This function
is disabled
by default. 4. Using “AT+UIMHOTSWAPLEVEL=0 or 1″AT command to set the USIM
card detection level to adapt to
the signal logic. 5. For more details of AT commands about USIM, please refer
to document [1].
The circuit of the USIM card is easy to be interfered with, resulting in the
failure to recognize or drop the card, etc. so please follow the following
principles during the design: Be sure to keep the USIM socket away from the
main antenna during the PCB layout phase. USIM card traces should be away from
RF, VBAT and high speed signals, at the same time the USIM
card traces should be as short as possible. Keep the USIM socket’s GND pin
directly connected to the main ground. To prevent SIM_CLK from other signal
interference, it is suggested to make separate package to
protect SIM_CLK processing. Place TVS near the USIM socket, and the parasitic
capacitance of TVS should not be greater than
15pF, such as WS03DTUMS-B. Connect 22 resistors in series between USIM socket
and module can enhance ESD protection
performance. The rise/fall time of USIM_CLK should not exceed 40ns.
Table 23: TVS for USIM socket part number list
Manufacturer
WAYON
Part Number
WS03DTUMS-B
VRWM
3.3V
VCmax
8V
PPPmax
35W
CJmax
0.7pF
Package
DFN0603-2L
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WILL
ESD9X5VU-2/TR
5V
SIM7672X Series Hardware Design_V1.02
8V
72W
0.9pF DFN1006-2L
I2C Interface
The module provides one I2C interface, which supports standard speed clock frequency 100Kbps and high speed clock frequency 400Kbps. Its operation voltage is 1.8V.
Table 24: I2C interface pins definition
Pin name
I2C_SCL I2C_SDA
No.
Power domain
38 1.8V
37 1.8V
Type
OD OD
Description
I2C clock output I2C data I/O
Note
If unused, keep it open. Need pull up to VDD_EXT externally.
VDD_EXT
Module
4.7K
4.7K
I2C_SCL I2C_SDA
GND
Device
SCL SDA GND
Figure 21: I2C reference circuit
NOTE
I2C_SCL and I2C_SDA have no pull-up resistor inside, external resistor is
needed.
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GPIO Interface
SIM7672X Series Hardware Design_V1.02
The module provides multiple GPIOs. Table 25: Standard GPIO Resources of SIM7672X
Pin No.
Pin name
AT command operation GPIO
number
Pin typ.
19
GPIO1
GPIO1
IO
20
GPIO2
GPIO2
IO
21
GPIO3
GPIO3
IO
26
GPIO4
GPIO4
IO
35
GPIO5
GPIO5
IO
36
GPIO6
GPIO6
IO
44
GPIO7
GPIO7
IO
47
GPIO8
GPIO8
IO
48
GPIO9
GPIO9
IO
53
GPIO10
GPIO10
IO
67
GPIO11
GPIO11
IO
68
GPIO12
GPIO12
IO
Power domain
1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V
Default function
PU PD PU PD PU PU PU PU PD PU PU PU
Pad Edge wakeup
NO NO NO NO NO NO NO NO NO NO NO NO
STATUS Interface
The STATUS pin can be used to determine whether the module is powered on or not. When the module is powered on and initialization is complete, the status output is high, otherwise it will remain low.
Table 26: STATUS interface pin definition
Pin name
STATUS
No.
Power domain
42 1.8V
Type
DO
Description
Note
Module operation status If unused, keep it open. indication
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Module
SIM7672X Series Hardware Design_V1.02 VBAT
R
STATUS
2.2K 4.7K
47K
Figure 22: STATUS reference circuit
NOTE
The value of the resistor named “R” depends on the LED characteristic.
Network Status
Table 27: NETLIGHT interface pin definition
Pin name
NETLIGHT
No.
Power domain
52 1.8V
Type
DO
Description
Note
Network registration status indicator (LED).
The NETLIGHT pin is used to control Network Status LED, its reference circuit is shown in the following figure.
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Module
SIM7672X Series Hardware Design_V1.02 VBAT
R
NETLIGHT
2.2K 4.7K
47K
Figure 23: NETLIGHT reference circuit
NOTE
The value of the resistor named “R” depends on the LED characteristic.
The NETLIGHT signal is used to control the LED light that indicates the status of the network. The working status of this pin is shown in the table below.
Table 28: LTE mode NETLIGHT pin status
NETLIGHT pin status
Always On 200ms ON, 200ms OFF OFF
Module status
Searching Network Data Transmit/Registered Power off / Sleep
GNSS Interface
The module supports GNSS function interface. GNSS provides 2 power supply input interfaces, 2 GNSS power enable control switch, 1 reset interface, 1 debug interface, 1 UART interface and 1 pulse synchronous clock signal interface, which are described in detail as follows.
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SIM7672X Series Hardware Design_V1.02
Table 29: GNSS interface description
PIN Name
PIN NO
I/O
Description
Note
Power supply ranges from 2.0V
GNSS_VBKP
116 PI GNSS backup power input
to 3.6V, suggest 2.8V power
supply.
The power supply voltage must
be no less than 1.75V and no
GNSS_VDD
97 PI GNSS VSYS input
more than 1.9V, typically 1.8V. The cable must be as short as
possible, with a cable width of
more than 0.3mm.
Active high.
Solution 1: Use 10K resistor in
GNSS_PWRCTL
98
DI GNSS’s internal Vcore power series to connect to GPIO,
enable control
recommend use GPIO2 (PIN20).
Solution 2: Use 10K resistor in
series to connect to MCU GPIO.
Only at standalone mode it can
GNSS_VDD_EN
40
DI GNSS’s internal system power be used by connecting to MCU
enable control
GPIO with 10K resistor in series.
If unused, keep it open.
1.8V power domain.
Solution 1: Use 1K resistor in
series to connect
GNSS_RXD
96 DI GNSS UART RXD
AUX_UART_TXD (PIN50) of the module.
Solution 2: Use 1K resistor in
series to connect to MCU
UART_TXD.
1.8V power domain.
Solution 1: Use 1K resistor in
series to connect
GNSS_TXD
95 DO GNSS UART TXD
AUX_UART_RXD (PIN49) of the module.
Solution 2: Use 1K resistor in
series to connect to MCU
UART_RXD
1PPS
GNSS pulse synchronous clock
100 DO
If unused, keep it open.
signal
GNSS_DEBUG_TX 115 DO GNSS debug TXD
GNSS_DEBUG_RX 111 DI GNSS debug RXD
GNSS_RST_N
114 AI GNSS RST interface
Active low.
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SIM7672X Series Hardware Design_V1.02
GNSS recommended reference design solution 1: SIM7672X module itself provides power, power enable and UART transmission to GNSS, the recommended reference design is as follows:
Module Part 1
VDD_EXT 15
AUX_UART_TXD 50 AUX_UART_RXD 49
GPIO2 20
Suggest always on 2.2uF
0
External 2V8
1K 1K 10K
TP
10 0R
TP
100R
Module Part 2
GND
97 GNSS_VDD
116 GNSS_VBKP GND 96 GNSS_RXD 95 GNSS_TXD 98 GNSS_PWRCTL
100 1PPS
111 GNSS_DEBUG_RX
115 GNSS_DEBUG_TX
90 GNSS_ANT
Figure 24: GNSS reference design (Non-standalone GNSS solution)
GNSS recommended reference design solution 2: The external MCU provides power,
power enable and UART transmission to GNSS, this solution is used for
scenarios where GNSS can work standalone without the module powering up. The
recommended reference design is as follows:
MCU 1.8V
VDD_EX T
VBAT supply Default:3.8V
2.2uF
MCU_TXD MCU_RXD
MCU_GPIO1 MCU_GPIO2
Suggest always on
0R
External 2V8
1K 1K 10K 0R
100R
TP
100R
VBAT Module
GND
97 GNSS_VDD
116 GNSS_VBKP GND 96 GNSS_RXD 95 GNSS_TXD 98 GNSS_PWRCTL 40 GNSS_1V8_EN 100
1PPS
111 GNSS_DEBUG_RX
115 GNSS_DEBUG_TX
90 GNSS_ANT
Figure 25: GNSS reference design (Standalone GNSS solution) www.simcom.com
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SIM7672X Series Hardware Design_V1.02
NOTE
1. Please place 1K resistors in series for serial communication lines with
non-standalone GNSS solution to prevent leakage current to the serial ports of
GNSS chip.
2. The standalone GNSS reference design is only applicable to 1.8V power
domain MCU. If the MCU is not 1.8V power domain, a level shift circuit should
be added.
3. The standalone GNSS design needs VBAT voltage input. 4. At standalone
mode, MCU_GPIO1 and MCU_GPIO2 should be pulled up at the same time to meet the
power on sequence. 5. The GNSS_VDD has higher requirements for power supply,
PCB routing should be as short as possible,
and the routing width is required to be at least 0.3mm. 6. GNSS_VBKP power
supply input is a necessary condition for hot start, which can ensure the
performance index of GNSS hot start to reach the optimal state. When 2.8V
input, the typical current consumption value is 37uA. 7. Make sure to connect
a 10K resistor to the GNSS_PWRCTL pin in series and then to the external
enable signal.
AT commands about GNSS are as following table.
Table 30: AT commands about GNSS
AT Command
AT+CGNSSPWR=
AT+CGNSSTST=
AT+CGPSCOLD AT+CGPSWARM AT+CGPSHOT AT+CGNSSSLEEP AT+CGNSSWAKEUP
AT+CGNSSFLP=
Description
GNSS power control
Warm start GNSS
Hot start GNSS
Set GNSS into sleep mode
Wake up GNSS
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SIM7672X Series Hardware Design_V1.02
NOTE
The GPIO2 will be pulled up after sending “AT+CGNSSPWR=1”. ‘*’ Indicates that
the functions is in development. Please reserve test points of GNSS_RXD and
GNSS_TXD for firmware upgrade. Please refer to document [1] for more AT
commands about GNSS.
PCM Interface*
The module provides a set of PCM interface, can be connected to an external audio codec chip, supports master mode, 16-bit linear short frame format.
The module supports audio function, does not support VoLTE function, customers can use audio function on PCM external codec. For specific parameters and matters, please refer to the relevant manuals of the software.
Table 31: PCM interface pins definition
Pin name
No.
Power domain
PCM_CLK 11 1.8V
PCM_SYNC 12 1.8V
PCM_DIN 13 1.8V
PCM_DOUT 14 1.8V
Type
I/O,PD I/O,PD DI,PD DO,PD
Description
PCM clock PCM frame synchronization PCM data input PCM data output
Note
If unused, keep it open.
Table 32: PCM interface description
Characteristic
Encoding-Format Data bits Master-slave mode PCM sample rate PCM frame
synchronization Data format
Description
Linear 16bits/24bits Master 8KHz/16KHz Short frame MSB
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3.11.1. PCM Sequence
SIM7672X Series Hardware Design_V1.02
SSPSCLK SSPSFRM
SSPTXD
SSPRXD
Undefined
Bit[N]
Bit[N-1]
Bit[1]
Bit[0]
Bit[N]
Bit[N-1]
Bit[1]
MSB
4 to 32 Bits
Figure 26: PCM sequence
Bit[0] LSB
Undefined
3.11.2. PCM Reference Design
Module
PCM_IN PCM_OUT PCM_SY NC PCM_CLK
VDD_EXT 4.7K
SCL
4.7K
SDA
BL M21 PG 22 1SN 1
GND 0R 0R
0R 0R
AG ND
100pF
4.7uF
3.3V 3.8V VDD_EXT
PA DG ND VS SA VS SSP K
VDDA VDDSP K
VDDD
ADCOUT DACIN FS BCL K
MCLK
M ICBIA S
MIC+ MIC-
SCLK SDIO
MOUT
VS SD VREF
SP KOUT+ SP KOUT-
NAU8810
1.3K
1uF 1uF
1.3K 47uF 47uF
MIC
AG ND
Receiver (32)
AGND AGND AGND
Figure 27: PCM reference design
NOTE
PCM function is in development.
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Other Interface
SIM7672X Series Hardware Design_V1.02
3.12.1. ADC
The module has 2 general ADC pins, and support VBAT ADC.
Table 33: ADC interface pins definition
Pin name
ADC1 ADC2
No.
Power domain
25 0V-1.1V
51 0V-1.1V
Type
AI AI
Description
General Purpose ADC General Purpose ADC
Note
If unused, keep it open. If unused, keep it open.
The electrical characteristics are as follows:
Table 34: General ADC electronic characteristics
Characteristics
Resolution Input Range Input Resistance
Min.
0 0.26
Typ.
12 –
Max.
1.1 0.75
Unit
Bits V M
NOTE
“AT+CADC=2” can be used to read the voltage of the ADC1 pin. “AT+CADC2=2” can
be used to read the voltage of the ADC2 pin. “AT+CBC” can be used to read the
voltage value of the power supply (VBAT). For more details, please refer to
document [1].
3.12.2. VDD_EXT
The module provides 1 LDO outputs: VDD_EXT. VDD_EXT can only provide a current capacity of 50mA. It can be used as a power supply for module GNSS_VDD (PIN97).
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SIM7672X Series Hardware Design_V1.02
Table 35: LDO output pin definition
Pin name
No.
Power domain
VDD_EXT 15 –
Type Description
Note
1.8V power output, Default on. It can provide 1V8
PO output current up to power supply for GNSS. If unused,
50 mA.
keep it open.
Table 36: VDD_EXT electrical characteristics
Symbol
VDD_EXT IO
Description
Output voltage Output current
Min.
–
Typ.
1.8 –
Max.
50
Unit
V mA
NOTE
1. If the module enters PSM mode, the VDD_EXT will be powered off. 2. If the
damage will affect the system startup, it is recommended that customers add
TVS protection. The recommended model is ESD56051N.
Table 37: TVS for VDD_EXT part number list
Manufacturer
WILLSEMI
Part Number
ESD56051N-2/TR
VRWM
3.3V
VCmax
10V
CJmax
65F
Package
DFN1006-2L
3.12.3. MAIN_UART_WAKEUP
The module provides a MAIN_UART_WAKEUP interface, which can connect to MAIN_UART_RXD externally to wake up the module.
Table 38: MAIN_UART_WAKEUP interface pin definition
Pin name
No.
Power domain
Type
Description
Note
MAIN_UART_WAKEUP 41 1.8V
Connect it to
MAIN_UART_RXD
DI
MAIN_UART_RXD externally
wake-up pin.
if use this function.
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3.12.4. ANT_CTRL
SIM7672X Series Hardware Design_V1.02
The module provides a set of antenna GRFC dedicated signals lines. It can be used to control the antenna tuner to improve antenna performance.
Table 39: ANT_CTRL interface pins definition
Pin name
No.
Power domain
ANT_CTRL1 42
ANT_CTRL2 43
Type
DO DO
Description
FEMIO for tuner switch FEMIO for tuner switch
Note
The reference circuit is shown in the following figure:
MODULE
ANT_CTRL1 ANT_CTRL2
External VDD
Antenna VDD Tuner
ANT VC1
VC2
ANT RF_IN
RF_IN
RF_IN
GND GND
Figure 28: RF control interface reference circuit
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SIM7672X Series Hardware Design_V1.02
RF Specifications
LTE Specifications
Table 40: Conducted transmission power
Frequency
LTE-FDD B1 LTE-FDD B2 LTE-FDD B3 LTE-FDD B4 LTE-FDD B5 LTE-FDD B7 LTE-FDD B8
LTE-FDD B12 LTE-FDD B13 LTE-FDD B14 LTE-FDD B18 LTE-FDD B19 LTE-FDD B20 LTE-
FDD B25 LTE-FDD B26 LTE-FDD B28 LTE-FDD B66 LTE-FDD B71 LTE-TDD B34 LTE-TDD
B38 LTE-TDD B39 LTE-TDD B40 LTE-TDD B41
Power
23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB
23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB
23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB
23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB
23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB
Min.
<-40dBm <-40dBm <-40dBm <-40dBm <-40dBm <-40dBm <-40dBm <-40dBm <-40dBm
<-40dBm <-40dBm <-40dBm <-40dBm <-40dBm <-40dBm <-40dBm <-40dBm <-40dBm
<-40dBm <-40dBm <-40dBm <-40dBm <-40dBm
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Table 41: E-UTRA operating bands
SIM7672X Series Hardware Design_V1.02
E-UTRA
1 2 3 4 5 7 8 12 13 14 18 19 20 25 26 28 66 71 34 38 39 40 41
UL Freq.
1920~1980 MHz 1850~1910MHz 1710~1785 MHz 1710~1755MHz 824849 MHz 2500~2570MHz
880~915 MHz 699~716MHz 777~787MHz 788~798MHz 815~830MHz 830~845MHz 832~862MHz
1850~1915MHz 814~849MHz 703~748MHz 1710~1780MHz 663~698MHz 2010~2025MHz
2570~2620 MHz 1880~1920 MHz 2300~2400 MHz 2535~2655 MHz
DL Freq.
2110~2170 MHz 1930~1990MHz 1805~1880 MHz 2110~2155MHZ 869894MHz 2620~2690MHz
925~960 MHz 729~746MHz 746~756MHz 758~768MHz 860~875MHz 875~890MHz 791~821MHz
1930~1995MHz 859~894MHz 758~803MHz 2110~2200MHz 617~652MHz 2010~2025MHz
2570~2620 MHz 1880~1920 MHz 2300~2400 MHz 2535~2655 MHz
Duplex Mode
FDD FDD FDD FDD FDD FDD FDD FDD FDD FDD FDD FDD FDD FDD FDD FDD FDD FDD TDD
TDD TDD TDD TDD
Table 42: Conducted receive sensitivity
Frequency
LTE FDD/TDD
Receive sensitivity(Typical)
Refer to the table 43
Receive sensitivity(MAX)
3GPP
Table 43: Reference sensitivity (QPSK)
E-UTRA Band
1 2 3 4 5 7
1.4 MHz -102.7 -101.7 -104.7 -103.2 –
3MHz -99.7 -98.7 -101.7 -100.2 –
3GPP TS36.521-1
5MHz
10MHz 15 MHz
-100
-97
-95.2
-98
-95
-93.2
-97
-94
-92.2
-100
-97
-95.2
-98
-95
–
-98
-95
-93.2
20 MHz -94 -92 -91 -94 -92
Actual
10 MHz TBD TBD TBD TBD TBD TBD
Duplex Mode
FDD FDD FDD FDD FDD FDD
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SIM7672X Series Hardware Design_V1.02
8
-102.2 -99.2
-97
-94
–
–
TBD
FDD
12
-101.7 -98.7
-97
-94
–
–
TBD
FDD
13
–
–
-97
-94
–
–
TBD
FDD
14
–
–
-97
-94
–
–
TBD
FDD
18
–
–
-99.3
-96.3
-94.5
–
TBD
FDD
19
–
–
-99.3
-96.3
-94.5
–
TBD
FDD
20
–
–
-97
-94
-91.2
-90
TBD
FDD
25
-101.2 -98.2
-96.5
-93.5
-91.7
-90.5
TBD
FDD
26
-102.7 -99.7
-97.5
-94.5
-92.7
–
TBD
FDD
28
–
-100.2 -98.5
-95.5
-93.7
-91
TBD
FDD
66
-104.2 -101.2 -99.5
-96.5
-94.7
-93.5
TBD
FDD
71
–
–
-96.5
-93.5
-91.7
-90.5
TBD
FDD
34
–
–
-100
-97
-95.2
–
TBD
TDD
38
–
–
-100
-97
-95.2
-94
TBD
TDD
39
–
–
-100
-97
-95.2
-94
TBD
TDD
40
–
–
-100
-97
-95.2
-94
TBD
TDD
41
–
–
-98
-95
-93.2
-92
TBD
TDD
LTE Antenna Requirements
For better overall performance, it is recommended that the antenna design should refer to the index requirements in the following table.
Table 44: LTE antenna requirements
Passive
Operating band Direction Gain Input impedance Efficiency Maximum input power
VSWR Isolation PCB insertion loss(<1GHz) PCB insertion loss(1GHz~2.2GHz) PCB
insertion loss(2.3GHz~2.7GHz)
Recommended standard
Please refer to the table 40 and table 41 Omnidirectional > -3dBi (Avg) 50 ohm
50 % 50W < 2 >20dB <0.5dB <1dB <1.5dB
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SIM7672X Series Hardware Design_V1.02
GNSS Specifications
Table 45: GNSS operating bands
Type
GPS L1 GLONASS G1 BeiDou B1I GALILEO E1
Frequency
1575.42±1.023MHz 1601.7±6.75MHz 1561.098±2.046MHz 1575.42±1.023MHz
Table 46: GNSS performance
GNSS
Description Min
Horizontal Position Accuracy Automatic position
Velocity Accuracy
Without Aid DFPS
Timing Accuracy
Maximum Altitude
Dynamic Performance
Maximum Velocity Maximum Acceleration
TTFF (A-GPS off) GPS(L1)+GLONASS+BEIDOU
Hot start Warm start Cold start
TTFF (A-GPS on) (EPO in flash mode)
Hot start Warm start Cold start
Autonomous
Sensitivity GPS (L1)
acquisition (cold start) Re-acquisition
Tracking
Channels
Update rate
Receiver
Tracking L1, CA code
Protocol support
NMEA, PAIR
Performance
Type
Max
0.18
0.42 14 23.4
-147 -156.5 -164
Unit
m m/s m/s ns m m/s
G
S S S S S S
dBm
dBm dBm
Hz
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Acquisition
Power consumption With GPS Continuous tracking
(L1) +GALILEO+BEIDOU
Sleep current
RTC current
SIM7672X Series Hardware Design_V1.02
mA mA uA uA
GNSS Antenna Requirements
Table 47: Recommended Antenna Characteristics (GNSS)
Passive
Operating band Direction Input impedance Maximum input power VSWR Plan
category Passive antenna gain Active antenna gain Active antenna noise figure
Built-in antenna LNA gain Total antenna gain Coaxial insertion loss
Recommended standard
L1: 1559~1609MHZ Hemisphere, face to sky 50 ohm 50W <2 RHCP or Linear 0dBi
-2dBi <1.5 20dB(Typ.) <18 dB <1.5dB
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SIM7672X Series Hardware Design_V1.02
Antenna Reference Design
4.5.1. Passive Antenna for LTE/GNSS
Module
ANT GND
RF connector
Matching circuit
R1 C1
R2 D1 C2 TVS
Antenna 47nH
LTE antenna needed
Figure 29: Passive antenna reference
In above figure, the component R1/C1/C2/C3 is reserved for antenna matching,
the value of components can only be acquired after the antenna tuning, usually
provided by the antenna factory. Among them, R1 paste 0, C3 paste 100pF, C1
and C2 do not paste by default. The component D1 is a Bidirectional ESD
Protection device, which is suggested to add to protection circuit, the
recommended Part Numbers of the TVS for RF main antenna and GNSS antenna are
listed in the following table:
Table 48: TVS for RF main antenna part number list
Manufacturer
Murata INPAQ BilLSEMI
Part Number
LXES03AAA1-154 CES10201V05B0 BLE5V0CR05UB
VRWM
4V 5V 5V
Table 49: TVS for GNSS antenna part number list
VCmax
28V 30V 40V
CJmax
0.05pF 0.1pF 0.05pF
Package
0603 0201 DFN1006-2L
Manufacturer
WAYON
Part Number
WE05DGCF-B
VRWM
5V
VCmax
23V
CJmax
0.3pF
Package
DFN1006-2L
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4.5.2. Active Antenna for GNSS
SIM7672X Series Hardware Design_V1.02
If active antenna is used, there should be an external power supply. Reference design is shown as bellow:
Module
GNSS_ANT GND
VDD
0.1uF
10R
47nH
0R NC
100pF NC
Active Antenna TVS
Figure 30: Active antenna reference
PCB layout
Customers should pay attention to the impedance design of PCB layout from the
module ANT port to the antenna connector, and the length of the PCB trance
should be within 20 mm, and far away from interference signals such as power &
clock. It is recommended to reserve RF Switch Connector for conduction test.
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SIM7672X Series Hardware Design_V1.02 Figure 31: Reference PCB layout
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SIM7672X Series Hardware Design_V1.02
Electrical Specifications
Absolute maximum ratings
Absolute maximum rating for digital and analog pins of SIM7672X are listed in the following table, exceeding these limits may cause permanent damage to the module.
Table 50: Absolute maximum ratings
Parameter
Voltage on VBAT Voltage on VBUS Voltage at digital pins (GPIO, I2C, UART, PCM)
Voltage at l/O pins (USIM) Voltage at PWRKEY Voltage at RESET
Min.
-0.3 -0.3
-0.3
-0.3 -0.3 -0.3 -0.3
Typ.
–
–
–
Max.
4.5 5.4
2.0
2.0 3.3 4.5 3.6
Unit
V V
V
V V V V
Operating conditions
Table 51: Recommended operating ratings
Parameter
Voltage at VBAT Voltage at VBUS
Table 52: 1.8V Digital I/O characteristics*
Parameter
VIH VIL VOH VOL
Description
High-level input voltage Low-level input voltage High-level output voltage
Low-level output voltage
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Min.
3.4 3.6
Typ.
3.8 5.0
Max.
4.2 5.2
Unit
V V
Min.
VCC0.7 -0.3
VCC0.8 0
Typ.
1.8 0 –
Max.
VCC+0.2 VCC0.2
VCC0.15
Unit
V V V V
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SIM7672X Series Hardware Design_V1.02
High-level output current (no pull
IOH
down resistor)
–
Low-level output current (no pull
IOL
up resistor)
–
Input high leakage current (no
IIH
pull-down resistor)
–
Input low leakage current (no pull
IIL
up resistor)
-10
–
–
mA
–
–
mA
–
10
uA
–
–
uA
NOTE
These parameters are for digital interface pins, such as GPIO, I2C, UART and
PCM.
The operating temperature of SIM7672X is listed in the following table.
Table 53: Operating temperature
Parameter
Normal operation temperature Extended operation temperature* Storage
temperature
Min.
-30 -40 -45
Typ.
25
Max.
75 85 90
Unit
NOTE
When Module is within the extended operation temperature range, Module is able
to establish and maintain data transmission, SMS, etc. The performance may
deviate slightly from the 3GPP specifications, but will meet 3GPP
specifications again when the temperature returns to normal operating
temperature levels. It is strongly recommended that customers take heat
dissipation measures to ensure that the normal operating temperature of the
module can’t be exceeded.
Operating Mode
5.3.1. Operating Mode Definition
The table below summarizes the various operating modes of SIM7672X product.
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SIM7672X Series Hardware Design_V1.02
Table 54: Operating mode Definition
Mode
Normal operation
LTE Sleep
LTE Idle LTE Data transmission
Minimum functionality mode
Flight mode
PSM mode
Power off
Function
AT command “AT+CSCLK=1” can be used to set the module to sleep mode. In this
case, the current consumption of module will be reduced to the minimal level
and the module can still receive paging message and SMS. Software is active.
Module is registered to the network, and the module is ready to communicate.
There is data transmission in progress. In this case, power consumption is
related to network settings (e.g., power control level); uplink/downlink data
rates, etc. AT command AT+CFUN=0 AT+CSCLK=1′ can be used to set the module to a minimum functionality mode without removing the power supply. In this mode, the RF part of the module will not work and the USIM card will not be accessible, but the serial port and USB port are still accessible. The power consumption in this mode is lower than normal mode. AT commandAT+CFUN=4′ can
be used to set the module to flight mode without removing the power supply. In
this mode, the RF part of the module will not work, but the serial port and
USB port are still accessible. The power consumption in this mode is lower
than normal mode. AT command AT+CPSMS’ can be used to set the module to PSM mode without removing the power supply. In this mode, the CPU is powered off, only the clock circuit inside the module works, the network is not connected, and the serial port and USB are unavailable. In this case, the power consumption of the module is reduced to the minimum. Module will go into power off mode by sending the AT commandAT+CPOF’ or pull down the PWRKEY pin,
normally. In this mode the power management unit shuts down the power supply,
and software is not active. The serial port and USB are not accessible.
5.3.2. Sleep mode
In sleep mode, the current consumption of module will be reduced to the
minimal level. Both hardware and software should meet several conditions
simultaneously so that SIM7672X will enter into sleep mode: USB condition:
Send AT+CSCLK=1′ and unplug USB. Software condition: Software must support sleep mode configuration. UART condition: SendAT+CSCLK=1′.
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SIM7672X Series Hardware Design_V1.02
NOTE
Before designing, please pay attention to how to realize sleeping/waking
function and refer to document [24] for more details.
5.3.3. Minimum functionality mode and Flight mode
Minimum power consumption mode ceases a majority function of Module, to enable
the module enter the minimum power consumption mode, the following hardware
and software conditions must be followed:
(1) Module is in normal mode. (2) Send AT command “AT+CFUN=0”. (3) Send AT
command “AT+CSCLK=1”. (4) DTR pin pulled to high level and VBUS pulled to low
level.
This mode is set by the AT command which provides a choice of the
functionality levels.
AT+CFUN=0: Minimum functionality AT+CFUN=1: Full functionality (Default)
AT+CFUN=4: Flight mode
If SIM7672X has been set to minimum functionality mode, the RF function and
SIM card function will be closed. In this case, the serial port and USB are
still accessible, but RF function and SIM card will be unavailable. If
SIM7672X has been set to flight mode, the RF function will be closed. In this
case, the serial port and USB are still accessible, but RF function will be
unavailable. When SIM7672X is in minimum functionality or flight mode, it can
return to full functionality by the AT command “AT+CFUN=1”.
5.3.4. PSM mode
The PSM mode can be set by “AT+CPSMS”, and it can minimize the current consumption.
The module is initially in the RRC connect state, and it will enter idle mode after disconnecting RRC Connect by “end call”, while the timer T3324/T3412 starts timing. After the timer T3324 expires, the module enters the PSM mode. The module will wake up automatically after the timer T3412 expiring, and it will enter TAU mode. The AT command for entering the PSM mode are as follows: AT$QCPMUCFG=1,4 //Set PMU Deep sleep mode AT$QCPSMR=1 //Open PSM reporting URC AT+CEREG?
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SIM7672X Series Hardware Design_V1.02
AT+CPSMS=1,,,”01011111″,”00000001″ //Enable PSM Mode, Set T3412_ext and T3324
AT+CEREG? //Query network status
After entering the PSM mode, the module will terminate the network connection,
and unable to respond to requests. Customers can send AT command when the
timer T3412 expiring or pull down the PWRKEY to wake up the module. The module
will exit the PSM mode by “AT+CPSMS=0”.
Current Consumption
The current consumption is listed in the table below. Table 55: Current consumption on VBAT Pins (VBAT=3.8V)
LTE sleep/Idle mode
LTE supply current (GNSS off, without USB connection)
PSM mode
PSM supply current
Minimum functionality mode
AT+CFUN=0, AT+CSCLK=1
LTE Cat1
LTE-FDD B1 LTE-FDD B2 LTE-FDD B3 LTE-FDD B4 LTE-FDD B5 LTE-FDD B7 LTE-FDD B8
LTE-FDD B12 LTE-FDD B13 LTE-FDD B18 LTE-FDD B19 LTE-FDD B20 LTE-FDD B25 LTE-
FDD B26 LTE-FDD B28 LTE-FDD B66 LTE-FDD B71
Idle mode Typical: 4.13mA Sleep mode@DRX=0.32S Typical: 1.5mA Sleep mode@DRX=0.64S Typical: 729uA Sleep mode@DRX=1.28S Typical: 477uA
PSM mode Typical: 10uA
Typical: 139uA (with simcard) Typical: 148uA (without simcard)
@10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm
Typical :618mA Typical :656mA Typical :611mA Typical :613mA Typical :546mA Typical :668mA Typical :510mA Typical :580mA Typical :540mA Typical :600mA Typical :514mA Typical :536mA Typical :646mA Typical :569mA Typical :505mA Typical :658mA Typical :550mA
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SIM7672X Series Hardware Design_V1.02
LTE-TDD B34 LTE-TDD B38 LTE-TDD B39 LTE-TDD B40 LTE-TDD B41
@10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm @10MHz 23dBm
Typical :475mA Typical :470mA Typical :497mA Typical :639mA Typical :463mA
Table 56: Standalone GNSS current consumption on VBAT Pins (VBAT=3.8V, CAT1 OFF)
Mode
GPS (L1)
GPS (L1) +GLONASS
GPS (L1) +BEIDOU
Real network active antenna GPS (L1) +GALILEO+BEIDOU Real network passive
antenna GPS (L1) +GALILEO+BEIDOU
Condition
-130dBm/Tracking -145dBm/Tracking -130dBm/Cold start -145dBm/Cold start Loss of lock -130dBm/Tracking -145dBm/Tracking -130dBm/Cold start -145dBm/Cold start Loss of lock -130dBm/Tracking -145dBm/Tracking -130dBm/Cold start -145dBm/Cold start Loss of lock Outdoor search Acquisition Loss of lock Outdoor search Acquisition Loss of lock
Typical (mA)
7.40 7.32 9.79 9.69 8.87 8.73 8.71 11.09 9.88 9.70 10.31 10.14 10.60 10.89
9.96 12.23 11.86 12.41 10.32 9.85 10.55
ESD Notes
SIM7672X is sensitive to ESD in the process of storage, transporting, and
assembling. When SIM7672X is mounted on the customers’ mother board, the ESD
components should be placed beside the connectors which human body may touch,
such as SIM card holder, audio jacks, switches, keys, etc. The following table
shows the SIM7672X ESD measurement performance.
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SIM7672X Series Hardware Design_V1.02
Table 57: The ESD performance measurement table (Temperature: 25, Humidity: 45%)
Part
VBAT, GND Antenna port USB interface UART interface Other PADs
Contact discharge
+/-4K +/-4K +/-4K +/-3K +/-1K
Air discharge
+/-8K +/-8K +/-6K +/-6K +/-2K
NOTE
Test conditions: The external of the module has surge protection diodes and
ESD protection diodes. The data in table above were tested using SIMCom EVB.
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SIM7672X Series Hardware Design_V1.02
SMT Production Guide
Top and Bottom View of SIM7672X
NOTE
Figure 32: Top and bottom view of SIM7672X
The above is the design effect diagram of the module for reference. The actual appearance is subject to the actual product.
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Label Information
SIM7672X Series Hardware Design_V1.02
Figure 33: Label information for SIM7672X
Table 58: The description of label information
No.
Description
A
Project name
B
Part number
C
Serial number
D
IMEI number
E
QR code
Typical SMT Reflow Profile
It is recommended to lead free. During the furnace temperature test, the
thermocouple test point should be connected to the module position to ensure
that the module position reaches the required temperature. Recommended furnace
temperature profile (lead-free SMT reflow) is as follows:
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SIM7672X Series Hardware Design_V1.02
Figure 34: Recommended reflow furnace temperature curve (lead-free)
Table 59: The main board reflux temperature curve requirements (lead-free)
Temperature range
Preheating zone (room temperature~150 ) T1(150~180) T2(180-220) T3(220)
Cooling Zone
Time
NA 60-120S 15-20S 40-60S NA
Critical parameter
Temperature rise slope 1~2/S / / Peak temperature 240~245 Cooling slope
-2~-5/S
NOTE
The maximum times of refluxes for the module is once. Recommended lead-free
process. In the table above, the temperature testing location includes the
solder mask of the module MCU pins, bottom LGA pins, and external LCC pins.
The actual welding temperature is affected by other external factors, such as
the presence of furnace carriers, solder paste, size and thickness of the
substrate, and component resistance. Thermal requirements and panel design,
etc. Please confirm with our engineering and technical personnel in time if
the recommended parameters cannot be reached. Otherwise, the module may be
damaged. For boards with thickness less than 1.2mm, it is recommended to use
board supported by furnace carrier or materials with high Tg to prevent
warping and PCB when heated. Deformation, thus affecting module welding. For
modules larger than 35.0 mm *35.0 mm and 5G products, it is recommended to use
the furnace carrier to pass through the furnace to reduce the cause of the
bottom plate and mold. Due to the difference of Tg value of block, the
phenomenon of unbalanced thermal stress appears in the process of high
temperature welding reflow, resulting in the defect rate of virtual welding
and little tin.
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SIM7672X Series Hardware Design_V1.02
After the module is welded, X-ray and optical inspection methods shall be used
to check the welding quality. For specific standards, please refer to relevant
standards of IPC-A-610H. For more information about shipping and
manufacturing, please refer to Module Secondary SMT Process User Guide. Due to
the complexity of the SMT process, in case of uncertainty or processes not
mentioned in this document (such as selective wave soldering, ultrasonic
welding), please contact SIMCom support team before SMT process starts.
Moisture Sensitivity Level (MSL)
The modules are shipped in vacuum-sealed aluminum foil bag bags, vacuum packaging according to IPC/JEDEC standard J-STD-020C specification Recommended storage conditions: The temperature is 23 ± 5, and the relative humidity is 35% to 60%. Storage period (sealed vacuum packaging): Under recommended storage conditions, the storage period is 12 months. The module meets the humidity sensitivity level 3, and the storage period after unpacking is shown in table below. The out-of-bag floor life of the module with MSL-3 is 168 hours. If the workshop temperature is 23±5 and the relative humidity is less than 60%, the module needs to be unpacked within 168 hours of reflux production or other high temperature operations. Otherwise, the module shall be stored in an environment with relative humidity less than 10% (for example, a moisture-proof cabinet) to keep the product dry.
Table 60: Moisture Sensitivity Level
MSL
1 2 2a 3 4 5 5a
6
Out-of-bag floor life
Comment
Unlimited
+30/85% RH
1 year
4 weeks
168 hours 72 hours
+30/60% RH
48 hours
24 hours
Mandatory bake before use. After bake, it must be reflowed within the time limit specified on the label.
Before using, it is necessary to confirm whether the package is in good condition. After unpacking, check the status of humidity indicator card in vacuum bag (Figure 36). The module needs to be baked before use if any of the following conditions occur.
Explanation Humidity indicator card: 30%, 40%, and 50% of any indicator circle has discolouring
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SIM7672X Series Hardware Design_V1.02
The module has been un-packed and the module exceeds the humidity sensitivity
level corresponding to the exposed workshop time. For example, MSL=3 is 168.
Packedbut the Shelf Life exceeds 12 months Exceeds the Floor Life Unable to
track and determine the status of the module;
Figure 35: Humidity card
The following conditions also need to be pre-baked. The storage temperature
and humidity do not meet the recommended storage conditions. Vacuum sealed bag
leak, bulk materials Before repairing the module. After unpacking, the module
failed to complete production or storage under the control of humidity
sensitive level 3.
Baking Requirements
If baking is required, proceed according to the requirements in the table below. Preferentially choose a nitrogen-filled oven.
Table 61: Module baking requirements
Baking conditions
120±5, <5% RH
Baking time
8 hours
Comment
Not applicable to original packaging pallets
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SIM7672X Series Hardware Design_V1.02
NOTE
In order to prevent and reduce the occurrence of poor welding caused by
moisture, such as foaming and delamination, the module should be strictly
controlled. It is not recommended to expose the module to air for a long time
after unpacking the vacuum package Before baking, it is necessary to remove
the module from the package and place the bare module on the high temperature
resistant device to avoid high temperature damage to the plastic tray or coil;
The modules for secondary baking must be welded within 24 hours after baking,
otherwise they need to be stored in vacuum packaging or in a drying oven.
Please pay attention to ESD protection when unpacking and placing modules,
such as wearing antistatic gloves.
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SIM7672X Series Hardware Design_V1.02
7. Packaging
SIM7672X module support tray packaging.
Module tray drawing:
Figure 36: Packaging diagram
Table 62: Tray size
Length (±3mm)
242.0
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Figure 37: Tray drawing
Width (±3mm)
161.0
Module number
20
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Small carton drawing:
SIM7672X Series Hardware Design_V1.02
Figure 38: Small carton drawing
Table 63: Small Carton size
Length (±10mm)
270
Width (±10mm)
180
Height (±10mm)
120
Big carton drawing:
Module number
20*20=400
Figure 39: Big carton drawing
Table 64: Big Carton size
Length (±10mm)
380
Width (±10mm)
280
Height (±10mm)
280
Module number
400*4=1600
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SIM7672X Series Hardware Design_V1.02
Appendix
Coding Schemes and Maximum Net Data Rates over Air Interface
Table 65: Coding Schemes and Maximum Net Data Rates over Air Interface
LTE-FDD device category (Downlink)
Category M1
LTE-FDD device category (Uplink)
Category M1
Max data rate (peak)
1Mbps
Max data rate (peak)
375kbps
Modulation type
QPSK/16QAM
Modulation type
QPSK/16QAM
Related Documents
Table 66: Related Documents
NO. Title
SIM7672X & SIM7652X Series AT_Command [1] _Manual_V1.00 [2] ITU-T Draft new
recommendationV.25ter [3] GSM 07.07 [4] GSM 07.10
[5] GSM 07.05
[6] GSM 11.14
Description
AT Command Manual
Serial asynchronous automatic dialing and control Digital cellular
telecommunications (Phase 2+); AT command set for GSM Mobile Equipment (ME)
Support GSM 07.10 multiplexing protocol Digital cellular telecommunications
(Phase 2+); Use of Data Terminal Equipment Data Circuit terminating
Equipment (DTE DCE) interface for Short Message Service (SMS) and Cell
Broadcast Service (CBS) Digital cellular telecommunications system (Phase 2+);
Specification of the SIM
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[7] GSM 11.11 [8] GSM 03.38 [9] GSM 11.10 [10] 3GPP TS 51.010-1 [11] 3GPP TS
34.124 [12] 3GPP TS 34.121 [13] 3GPP TS 34.123-1 [14] 3GPP TS 34.123-3
[15] EN 301 908-02 V2.2.1
[16] EN 301 489-24 V1.2.1
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SIM7672X Series Hardware Design_V1.02
Application Toolkit for the Subscriber Identity Module Mobile Equipment (SIM
ME) interface Digital cellular telecommunications system (Phase 2+);
Specification of the Subscriber Identity Module Mobile Equipment (SIM ME)
interface Digital cellular telecommunications system (Phase 2+); Alphabets and
languagespecific information Digital cellular telecommunications system (Phase
2); Mobile Station (MS) conformance specification; Part 1: Conformance
specification Digital cellular telecommunications system (Release 5); Mobile
Station (MS) conformance specification Electromagnetic Compatibility (EMC) for
mobile terminals and ancillary equipment. Electromagnetic Compatibility (EMC)
for mobile terminals and ancillary equipment. Technical Specification Group
Radio Access Network; Terminal conformance specification; Radio transmission
and reception (FDD) User Equipment (UE) conformance specification; Part 3:
Abstract Test Suites. Electromagnetic compatibility and Radio spectrum Matters
(ERM); Base Stations (BS) and User Equipment (UE) for IMT-2000. Third
Generation cellular networks; Part 2: Harmonized EN for IMT-2000, CDMA Direct
Spread (UTRA FDD) (UE) covering essential requirements of article 3.2 of the
R&TTE Directive Electromagnetic compatibility and Radio Spectrum Matters
(ERM); Electromagnetic Compatibility (EMC) standard for radio equipment and
services; Part 24: Specific conditions for IMT-2000 CDMA Direct Spread (UTRA)
for Mobile and portable (UE) radio and ancillary equipment.
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SIM7672X Series Hardware Design_V1.02
[17] IEC/EN60950-1(2001)
Safety of information technology equipment (2000)
Digital cellular telecommunications system
[18] 3GPP TS 51.010-1
(Release 5); Mobile Station (MS)
conformance specification
[19] GCF-CC V3.23.1
Global Certification Forum – Certification Criteria
Directive of the European Parliament and
of the Council of 27 January 2003 on the
[20] 2002/95/EC
restriction of the use of certain hazardous
substances in electrical and electronic
equipment (RoHS)
Module Secondary SMT Process User [21] Guide_V1.01
Module secondary SMT Guidelines
SIM7672X & SIM7652X Series_UART_Application This document describes how to use UART
[22]
Note_V1.00
interface of SIMCom modules.
Antenna design guidelines for diversity receiver [23] system
Antenna design guidelines for diversity receiver system
[24] SIM7672X & SIM7652X Series_Sleep Mode_Application Note_V1.00
Sleep Mode Application Note
SIM7672X & SIM7652X Series_UIM HOT [25] SWAP_Application Note_V1.00
This document introduces UIM card detection and UIM hot swap.
Terms and Abbreviations
Table 67: Terms and Abbreviations
Abbreviation
ADC ARP BER BD BTS CS CSD CTS DAC DSP DTE DTR DTX
Description
Analog-to-Digital Converter Antenna Reference Point Bit Error Rate BeiDou Base
Transceiver Station Coding Scheme Circuit Switched Data Clear to Send Digital-
to-Analog Converter Digital Signal Processor Data Terminal Equipment
(typically computer, terminal, printer) Data Terminal Ready Discontinuous
Transmission
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DAM DPO EFR EGSM EMC ESD ETS FCC FD FDMA FR GMSK GNSS GPRS GPS GSM HR I2C IMEI LTE MO MS MT NMEA PAP PBCCH PCB PCS RF RMS RTC SIM SMS SMPS TDMA TE TX UART VSWR EDGE ZIF
SIM7672X Series Hardware Design_V1.02
Downloadable Application Module Dynamic Power Optimization Enhanced Full Rate
Enhanced GSM Electromagnetic Compatibility Electrostatic Discharge European
Telecommunication Standard Federal Communications Commission (U.S.) SIM fix
dialing phonebook Frequency Division Multiple Access Full Rate Gaussian
Minimum Shift Keying Global Navigation Satellite System General Packet Radio
Service Global Positioning System Global Standard for Mobile Communications
Half Rate Inter-Integrated Circuit International Mobile Equipment Identity
Long Term Evolution Mobile Originated Mobile Station (GSM engine), also
referred to as TE Mobile Terminated National Marine Electronics Association
Password Authentication Protocol Packet Switched Broadcast Control Channel
Printed Circuit Board Personal Communication System, also referred to as GSM
1900 Radio Frequency Root Mean Square (value) Real Time Clock Subscriber
Identification Module Short Message Service Switched-mode power supply Time
Division Multiple Access Terminal Equipment, also referred to as DTE Transmit
Direction Universal Asynchronous Receiver & Transmitter Voltage Standing Wave
Ratio Enhanced data rates for GSM evolution Zero intermediate frequency
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WCDMA VCTCXO SIM UMTS UART PSM FD LD MC ON RC SM NC
SIM7672X Series Hardware Design_V1.02
Wideband Code Division Multiple Access Voltage control temperature-compensated
crystal oscillator Universal subscriber identity module Universal mobile
telecommunications system Universal asynchronous receiver transmitter Power
saving mode SIM fix dialing phonebook SIM last dialing phonebook (list of
numbers most recently dialed) Mobile Equipment list of unanswered MT calls
(missed calls) SIM (or ME) own numbers (MSISDNs) list Mobile Equipment list of
received calls SIM phonebook Not connect
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Safety Caution
SIM7672X Series Hardware Design_V1.02
Table 68: Safety Caution
Marks
Requirements
When in a hospital or other health care facility, observe the restrictions
about the use of mobiles. Switch the cellular terminal or mobile off, medical
equipment may be sensitive and not operate normally due to RF energy
interference.
Switch off the cellular terminal or mobile before boarding an aircraft. Make
sure it is switched off. The operation of wireless appliances in an aircraft
is forbidden to prevent interference with communication systems. Forgetting to
think much of these instructions may impact the flight safety, or offend local
legal action, or both. Do not operate the cellular terminal or mobile in the
presence of flammable gases or fumes. Switch off the cellular terminal when
you are near petrol stations, fuel depots, chemical plants or where blasting
operations are in progress. Operation of any electrical equipment in
potentially explosive atmospheres can constitute a safety hazard.
Your cellular terminal or mobile receives and transmits radio frequency energy
while switched on. RF interference can occur if it is used close to TV sets,
radios, computers or other electric equipment.
Road safety comes first! Do not use a hand-held cellular terminal or mobile
when driving a vehicle, unless it is securely mounted in a holder for hands
free operation. Before making a call with a hand-held terminal or mobile, park
the vehicle.
GSM cellular terminals or mobiles operating over radio frequency signals and
cellular networks cannot be guaranteed to connect in all conditions,
especially with a mobile fee or an invalid SIM card. While you are in this
condition and need emergent help, please remember to use emergency calls. In
order to make or receive calls, the cellular terminal or mobile must be
switched on and in a service area with adequate cellular signal strength. Some
networks do not allow for emergency call if certain network services or phone
features are in use (e.g. lock functions, fixed dialing etc.). You may have to
deactivate those features before you can make an emergency call. Also, some
networks require that a valid SIM card be properly inserted in the cellular
terminal or mobile.
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