EFR32FG25B121F1152IM56-B

RF Transceiver ICS Overview

The EFR32FG25B121F1152IM56-B is a Sub-GHz RF System on Chip (SoC) from Silicon Labs, featuring an ARM Cortex-M33 core with a maximum clock frequency of 97.5 MHz. It integrates 1152 kB of Flash memory and 256 kB of RAM. The device supports FSK, O-QPSK, and OFDM modulation schemes with a maximum data rate of 2.4 Mbps. Key RF specifications include a transmit output power of 16 dBm and a receive sensitivity of -95.3 dBm. It operates within a supply voltage range of 1.71 V to 3.8 V, with typical current consumption of 6.28 mA during reception and 186 mA during transmission. The component is housed in a QFN-56 package and supports an operating temperature range from -40°C to +125°C.

RF Transceiver ICS Feature Summary

• Integrates Secure Vault-High security features for robust data protection
• Supports Wi-SUN protocol stack for smart utility applications
• Combines high-performance MCU with integrated Sub-GHz transceiver

RF Transceiver ICS Applications

• Sub-GHz Wi-SUN metering systems
• Lighting control networks
• Distribution automation infrastructure

RF Transceiver ICS Procurement Notes

Verify the specific suffix 'B' indicates the inclusion of Secure Vault-High hardware security features compared to non-B variants. Confirm the QFN-56 package dimensions and thermal pad requirements against your PCB layout guidelines. Ensure the selected variant matches the required memory capacity of 1152 kB Flash and 256 kB RAM for your application firmware. Check RoHS compliance documentation for final assembly verification.

RF Transceiver ICS Selection Notes

Select this model when high-level hardware security via Secure Vault-High is mandatory for the application. Choose this part over other FG25 variants if the specific combination of 1152 kB Flash and 256 kB RAM aligns with code size and runtime data requirements. Consider the Sub-GHz frequency band suitability for long-range, low-power mesh networking needs in outdoor or industrial environments.

RF Transceiver ICS Part Context

This component belongs to the Silicon Labs EFR32 Gecko family, specifically the FG25 series designed for Sub-GHz wireless applications. It represents a convergence of processing power and radio connectivity, targeting IoT deployments where reliability and security are critical. The B-series designation typically denotes enhanced security capabilities within the product line.

RF Transceiver ICS Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.