SIMCOM A7672S-FASE Series

LTE Cat 1 Modem with GNSS (GPS)

IoT/M2M-optimized

Overview

A7672S is the LTE CAT 1 module which supports wireless communication modes of LTE-FDD/GSM/GPRS/EDGE. It supports maximum 10Mbps downlink rate and 5Mbps uplinkrate. A7672S adopts LCC+LGA form factor and is compatible with SIM7000/SIM7070 series (NB/Cat M modules), and SIM800A/SIM800F(2G modules), which enables smooth migration from 2G/NB/Cat M products to LTE Cat 1 products, and greatly facilitates more compatible product design for the customer needs. A7672S supports multiple built-in network protocols and drivers for main operation systems (USB driver for Windows, Linux and Android). The software functions, AT commands are compatible with the SIM800 series modules. Meanwhile A7672S also supports GNSS*.

This CAT1 4G-LTE / 2G / GSM/ GPRS/ GNSS /GPS  Modem ( UART / USB ) Support Automatic 2G Fallback(incase 4G networks are not available) and GNSS (GPS) with Active or Passive Antenna. This modem Support communication through both USB and UART. The Modem has an option to populate (on request) Edge mountable SMA Connector for 4G LTE Antenna and an optional UFL connector has been provided for connecting external High Gain 4G LTE Antenna, if needed. Another UFL connector is provided for GNSS antenna. Using onboard PCB jumper user can select either Passive Patch antenna or External Active antenna for GNSS/GPS. Highly stable Low Dropout power supply has been provided for external GNSS/GSP Active antenna with LNA. All this antennae networks are carefully designed with RF PCB design layouts and proper impedance matching networks for ensuring maximum signal gain and RF power delivery. 

This 4G LTE CAT1 modem is built with Low dropout Voltage Regulator having current capacity of 3Amp to deliver enough current on demand, which will help modem to works properly on low signal range environments like remote villages on 2G Networks. Modem can be powered by DC voltage ranges from 5V DC to 12V DC. This 4G LTE CAT4 Modem is coming with selectable interfacing voltages based on user development environment, which allows you to connect 2V8 to 5V, including 3V3 or 5V Microcontroller without any extra level conversion IC, irrespective of voltage level. In order to attain High Speed data communication between Modem and External Microcontroller, we decided to use dedicated TXB0108 voltage level translator IC, instead of MOSFET or Diode/Resistor based Level conversion , which also helps us to interface the Modem with 2.8V to 5V Microcontroller. 

Apart from the Power, most of the important Status, Control ,UART Communications and LED pins are made available at on board 2MM pitch RMC Connectors to ease the interface with your microcontroller boards.The RMC connectors are separated based on its function and usability.For simple application ,user can make use of just two RMC connectors like Power ,Communications and leave all other RMC connector pins as unconnected. Advanced users can make use of other RMC connectors for utilising more built in functions.An audio jack has been provided for connecting Headphone and all audio pins are made available at Bergstrip connbector for external connectivity, if needed.

In order to reduce power consumption,while using with battery powered application, Modem power ON/OFF options are provided on RMC connector. User can Turn ON/OFF the modem power supply using this pin from an external microcontroller. Apart from this, PKEY pins are also made out of connector to Start and Stop the modem externally using microcontroller or switches. In order to reduce the GPIO pins required to control the modem, by default the modem is configured to start automatically once it is powered and if needed it can be controlled manually through PKEY pin, available on RMC connector, by removing the factory shorted PCB jumper.

By default The modem is populated with Push-Pull type  Micro SIM socket on top of the board, but can supply with Flap type SIM socket if needed. A Micro USB Connector is also provided as USB interface. Connectors like SIM socket,USB ports and Antenna Connectors are protected from Anti Static High Voltages using ESD protection ICs. 3 Nos onboard SMD LEDs are provided to know the modem status like POWER, STATUS and NET. Most of the required I/O pins are made available on Berg strip Headers (connector not populated) and the serial port status and control pins are also made available on separate RMC Connectors. 

The onboard Micro USB Connector helps you to connect the modem to PCB or Raspberry pi computer for interfacing with Software applications. The baud rate is configurable from 9600 through AT command.The onboard Low dropout 3A Regulated Power supply allows you to connect wide range unregulated power supply(5V-12V). Using this modem, you can make calls, SMS, Read SMS, attend the incoming calls, access internet etc through simple AT commands.

Features of A7672S-FASE modem

Specifications of A7672-FASE 4G LTE CAT1 module

Outer Dimension of the Board

Package includes:

• 1 x A7672S 4G-LTE / 2G / GNSS /GPS  Modem ( UART / USB )
• 1 x 4G LTE Antenna
• 1 x GPS external Active antenna
• 2 x SMA Female to UFL Connector With Cable
• 1 x 2 pin RMC connector
• 1 x 4 pin RMC connector
• 1 x 5 pin RMC connector
• 1 x 6 pin RMC connector

Development resources

• rhydoLABZ wiki 
• A7672S Specification
• AT commands
• A7672S Hardware Design Guide
• Application Notes 
• USB Drivers
• Serial Terminal Software