SIM A7670C 4G LTE TTL Modem – Cat-1 LTE Module with UART Interface

The SIM A7670C 4G LTE TTL Modem is a powerful Cat-1 module designed for wireless communication over LTE-FDD and LTE-TDD networks. It supports data transfer speeds of up to 10Mbps (downlink) and 5Mbps (uplink), making it suitable for IoT, industrial, and embedded applications that require reliable mobile connectivity.

Communication with the module is done using standard AT commands, enabling easy control through microcontrollers and development boards.

🔧 Key Features:

• LTE-TDD and LTE-FDD support

• Cat-1 LTE module with up to 10Mbps downlink and 5Mbps uplink

• Nano SIM card holder for seamless integration

• UART interface with onboard logic level converter supporting both 3.3V and 5V TTL (default is 5V)

• To switch to 3.3V TTL, move the 0E resistor from the 5V position to the 3.3V position as shown in the reference image

  

• AT command control for easy interfacing with microcontrollers

• Power LED and Network Status (NETLIGHT) LED for real-time feedback

• SMA antenna connector for strong signal reception

• Supports SMS and data transfer only (no voice, GPS, or Bluetooth functionality)

• Power requirement: 5V @ 500mA

• Built-in TCP/IP protocol stack for internet connectivity

• Additional software support: FOTA, LBS, SSL

📌 Available Pinouts:

• RING – Detects incoming calls

• DTR – Enables ultra-low power sleep mode

• STATUS – Indicates operational status of the module

• NETLIGHT – Allows external LED connection to show network activity

• RESET – Can be connected to an MCU for external reset control

📡 Supported Frequency Bands:

• LTE-FDD: B1 / B3 / B5 / B8

• LTE-TDD: B34 / B38 / B39 / B40 / B41

📐 Board Dimensions & Layout:

• Compact form factor ideal for embedded systems and development boards

• Clearly labeled pins for easy prototyping and integration

The SIM A7670C 4G LTE TTL Modem is a robust solution for developers looking to add 4G LTE connectivity to their embedded or IoT projects. With versatile TTL voltage support, advanced data features, and reliable performance, it is an excellent choice for applications such as remote monitoring, telemetry, smart metering, and asset tracking.

Please Note: Imagesa re for Representation only. The actual Image of the product may slightly Differ In apperance