SIMCom A7672E FASE LTE Cat 1 Module User Manual

1. Introduction

The SIMCom A7672E is an advanced LTE Cat 1 module designed for wireless communication, supporting LTE-FDD, GSM, GPRS, and EDGE modes. It delivers a maximum downlink rate of 10Mbps and an uplink rate of 5Mbps. Featuring an LCC+LGA form factor, the A7672E is compatible with SIM7000/SIM7070 series (NB/Cat M modules) and SIM800A/SIM800F series (2G modules), facilitating seamless migration from 2G/NB/Cat M to LTE Cat 1 products. This compatibility simplifies product design and integration for various customer needs.

The module supports multiple built-in network protocols and provides drivers for major operating systems, including Windows, Linux, and Android (USB driver). Its software functions and AT commands are compatible with the SIM800 series modules. The A7672E also incorporates BLE* and GNSS* functionalities and offers a rich set of industrial standard interfaces such as UART, USB, I2C, and GPIO. These features make it an ideal solution for diverse IoT applications, including telematics, POS systems, surveillance devices, industrial routers, and remote diagnostics.

2. Product Features

• Compact size with abundant interfaces.
• Supports BLE and GNSS functions*.
• Abundant software functions: FOTA, LBS, SSL.
• Form factor is compatible with the SIM7000/SIM7070 series.
• Strong compatibility with Mcore full range package.
• Wide voltage support (5-16V power supply, M2M level).
• Provides drivers, module firmware (FW), and STM code.
• Highly integrated power supply, SIM card, TTL, and RF.
• Multi-frequency product supporting 2G/3G/4G/CATM/NB/5G Band.
• FAE online support (China time only).

*Note: BLE and GNSS functionalities may require specific configurations or external components.

3. Specifications

3.1 General Product Properties

• High-concerned chemical: None
• Origin: Mainland China

3.2 Technical Parameters

Figure 1: SIMCom A7672E Technical Specifications

4. Package Contents

• A7672E Core board * 1
• Optional: 4G antenna or 4G-GPS antenna (depending on selected variant)

Figure 2: Module variants with 4G antenna and 4G-GPS antenna

5. Setup and Installation

5.1 Hardware Overview

The A7672E core board features an integrated power supply, a Micro SIM holder, and an INSIM slot (not soldered by default). It also includes a level conversion circuit for flexible voltage compatibility.

Figure 3: Hardware Characteristics

5.2 Pin Description

The module utilizes a 23PIN (2.54mm pitch) interface. For most standard applications, only VIN, GND, PEN, TXD, and RXD pins are required.

Figure 4: Pin Description

5.3 Power Supply

The module supports a DC input voltage range of 5-16V via USB or 3.4-4.2V for the module power supply. The default serial port operates at 3.3V TTL level, which can be changed to 5V if needed.

5.4 SIM Card and Antenna Installation

• Insert a Micro SIM card into the designated holder.
• Connect your 4G or 4G-GPS antenna to the IPEX 1 RF seat for easy installation.

5.5 Power-on Solutions

The product defaults to automatic boot. A POWRKEY boot solution is also available:

1. If a specific power-on sequence is required, please notify customer service before shipment.
2. For hardware developers, after receiving the goods, remove the material with bit number R5 and short 3.3V on the PWK/RST pin.

Figure 5: Power-on Solutions

5.6 Interface Connections

The module offers rich and flexible interfaces:

• The default welded 2.54 PIN is suitable for direct use in remote data transmission.
• XH2.54 terminals are optional for the core board, allowing connection to a main control board using terminal cables.
• The USB interface can be welded to XH2.0 terminals for RNDIS or PPP dial-up internet access.

Figure 6: Rich Interfaces and Flexible Applications

6. Operating Instructions

The A7672E module supports standard AT commands for configuration and control. Refer to the SIMCom AT Command Set documentation for detailed command usage.

• Network Protocols: The module supports a wide range of network protocols including TCP/IP, IPV4/IPV6, Multi-PDP, FTP, FTPS, HTTP, HTTPS, DNS, RNDIS, ECM, and PPP.
• Drivers: Install the appropriate USB drivers for your operating system (Windows, Linux, Android) to enable communication with the module.
• Functionality: The module provides LTE CAT1, 4G, 2G, Bluetooth (BT), GNSS, and Voice functionalities.

7. Maintenance

The A7672E module is designed for stable operation within an operating temperature range of -40°C to 85°C. It incorporates multiple protection features to ensure longevity and reliability:

• SIM card protection
• Power supply protection
• Pin TVS protection
• USB Protection
• Antenna TVS protection

These protections effectively safeguard the circuits from high voltage shocks and ESD damage, contributing to long-term stable performance.

Figure 7: Multi-protection, Stable and Reliable Design

To maintain optimal performance, ensure the module is operated within its specified temperature range and protected from excessive moisture or physical impact.

8. Troubleshooting

• Module not powering on: Verify that the power supply is within the specified range (DC5-16V or 3.4-4.2V). If using the POWRKEY solution, ensure R5 is removed and the PWK/RST pin is shorted to 3.3V as described in the Setup section.
• No network connection: Check that the SIM card is correctly inserted and active. Ensure the antenna is securely connected to the IPEX 1 port. Verify that the network band configuration matches your local network provider.
• Communication issues (UART/USB): Confirm that the correct drivers are installed on your host system. Check the baud rate and other serial port settings. For USB, ensure proper connection and driver recognition.

9. User Tips

• Easy Migration: Leverage the module's compatibility with SIM7000/SIM7070 and SIM800 series for easier integration into existing projects or new designs, reducing development time.
• Basic Connectivity: For fundamental data communication, ensure that the VIN, GND, PEN, TXD, and RXD pins are correctly wired. These are the essential connections for basic operation.
• Antenna Selection: Choose the appropriate antenna (4G or 4G-GPS) based on your application's specific needs for cellular and/or positioning services.

10. Technical Support

For technical assistance, including detailed documentation, drivers, firmware, and STM code, please refer to the official SIMCom resources or contact your vendor. FAE online support is available during China time.