RN4870-I/RM140

RF Transceiver Modules And Modems Overview

The RN4870-I/RM140 is a Bluetooth Smart RF transceiver module manufactured by Microchip Technology. It supports the Bluetooth v4.2 protocol and operates within the 2.402GHz to 2.48GHz ISM band using GFSK modulation. The module features an integrated chip antenna and utilizes a UART serial interface for communication. It functions on a supply voltage of 1.9V to 3.6V, with typical current consumption of 13mA during both transmission and reception. Key performance metrics include a transmit power of 0dBm and a receiver sensitivity of -90dBm. The device is housed in a 16-SMD surface-mount package and is rated for industrial operating temperatures ranging from -40°C to 85°C.

RF Transceiver Modules And Modems Feature Summary

• Supports Bluetooth v4.2 Low Energy protocol for efficient wireless data exchange
• Integrates a chip antenna to minimize external component requirements
• Provides flexible serial interface options including UART, SPI, I2C, and PWM
• Designed for low power consumption suitable for battery-operated applications

RF Transceiver Modules And Modems Applications

• Industrial sensor networks requiring reliable short-range communication
• Smart home devices and IoT peripherals
• Wearable electronics and health monitoring systems
• Asset tracking tags and location beacons

RF Transceiver Modules And Modems Procurement Notes

Verify that the specific suffix RM140 corresponds to the intended firmware version and pin configuration before integration. Confirm that the industrial temperature grade (-40°C to 85°C) meets the environmental requirements of the target application. Ensure the host system provides a stable 1.9V to 3.6V supply rail capable of handling transient current spikes during RF transmission phases.

RF Transceiver Modules And Modems Selection Notes

Select this model when Bluetooth v4.2 compatibility is required rather than newer versions like v5.0 found in the RN4871 series. The integrated chip antenna simplifies PCB layout but requires careful impedance matching. Consider the 16-SMD package size constraints against available board space. Verify that the host microcontroller can support the necessary serial protocols for module control and data transfer.

RF Transceiver Modules And Modems Part Context

This module belongs to the RN487x family of Bluetooth Smart transceivers from Microchip Technology. It shares the core RN4870 silicon die with other variants such as the RN4870-V/RM118, differing primarily in firmware revision and packaging specifications. The RN4870 series serves as a cost-effective solution for legacy Bluetooth Low Energy applications compared to the updated RN4871 series which supports Bluetooth v5.0.

RF Transceiver Modules And Modems Replacement Considerations

The RN4871-I/RM140 is a direct functional upgrade offering Bluetooth v5.0 support while maintaining similar physical dimensions and interface capabilities. Other compatible modules from different manufacturers may require significant schematic and firmware modifications due to differences in pinout definitions and proprietary command sets.