EFR32MR21A020F512IM32-CR

Overview

The EFR32MR21A020F512IM32-CR is a Silicon Labs RF System on a Chip operating at 2.4 GHz, supporting IEEE 802.15.4 and Bluetooth Low Energy (BLE) protocols. It integrates an ARM Cortex-M33 core with 512 kB of flash memory and 64 kB of RAM. The device features a +10 dBm output power capability and provides 20 GPIOs within a QFN32 package.

Feature Summary

• Integrates an ARM Cortex-M33 processor for efficient protocol handling
• Supports dual-mode connectivity via 802.15.4 and BLE standards
• Delivers high transmission power output for extended range applications

Applications

• Smart home sensor nodes
• Wireless mesh networking devices
• Bluetooth-enabled consumer electronics

Procurement Notes

Verify the specific suffix 'CR' against the manufacturer's official datasheet to confirm tape-and-reel packaging specifications and temperature grade. Ensure compatibility with existing PCB footprints for the QFN32 exposed pad configuration before finalizing procurement orders.

Selection Notes

Select this component when a balanced combination of moderate transmit power (+10 dBm) and low power consumption is required. It is suitable for designs needing integrated MCU capabilities alongside radio functions without external baseband processors.

Part Context

This model belongs to the Mighty Gecko series, designed for cost-sensitive IoT applications. It distinguishes itself from higher-power variants by offering a compact form factor while maintaining robust wireless performance for standard indoor coverage requirements.

Replacement Considerations

Check for EFR32MG21 series variants if higher output power or Thread support is needed. Verify pin-to-pin compatibility with previous generation EFR32 parts if migrating existing hardware designs.