EFR32MG21B020F768IM32-BR

Overview

The EFR32MG21B020F768IM32-BR is a Mighty Gecko RF transceiver and MCU integrating an ARM Cortex-M33 core. It operates in the 2.4GHz to 2.4835GHz ISM band with a maximum output power of 20dBm and sensitivity of -104.9dBm. The device features 768kB of flash memory and 64kB of RAM, supporting data rates up to 2Mbps. It accepts supply voltages between 1.71V and 3.8V, with receive currents ranging from 8.8mA to 9.8mA and transmit currents from 9.3mA to 185mA. Packaged in a 32-QFN (4x4mm) surface-mount format, it supports Bluetooth v5.1, Thread, and Zigbee protocols.

Feature Summary

• Supports multiprotocol wireless communication including Bluetooth v5.1, Thread, and Zigbee standards
• Integrates high-performance ARM Cortex-M33 processor with hardware cryptographic acceleration
• Provides robust radio performance with 20dBm output power and advanced modulation schemes
• Features extensive peripheral interfaces including I2C, SPI, UART, and multiple GPIOs

Applications

• Smart home lighting and control systems
• Wireless sensor networks and IoT devices
• Home automation hubs and gateways
• Industrial monitoring and control applications

Procurement Notes

Verify the complete part number including suffixes to ensure correct package and tape/reel configuration. Confirm that the specific variant matches the required firmware capabilities and regulatory certifications for the target market. Cross-reference the manufacturer datasheet for latest assembly site information and environmental compliance status before finalizing procurement orders.

Selection Notes

Select this component when multiprotocol support for Bluetooth, Thread, and Zigbee is required within a single chip solution. The 768kB flash capacity suits complex application logic, while the 20dBm transmitter range addresses moderate coverage needs. Consider the 32-QFN package dimensions for PCB layout constraints and verify thermal management requirements for the specified operating temperature range.

Part Context

This device belongs to the Silicon Labs Mighty Gecko series, designed for low-power wireless connectivity. It combines a highly integrated radio transceiver with a secure microcontroller unit. The MG21 family targets applications requiring mesh networking capabilities and efficient power management. It serves as a foundational component for modern smart building and industrial IoT deployments.

Replacement Considerations

EFR32MG21A020F768IM32-DR offers similar specifications but may differ in sensitivity or packaging details.