EFR32MG21A010F768IM32-B

Overview

The EFR32MG21A010F768IM32-B is a Mighty Gecko RF System on Chip (SoC) from Silicon Labs, integrating an ARM Cortex-M33 processor with a 2.4 GHz radio transceiver. It supports Bluetooth v5.1, Thread, and Zigbee protocols. The device features 768 kB of flash memory and 64 kB of RAM. It operates within a supply voltage range of 1.71 V to 3.8 V. Key electrical parameters include a maximum output power of 10 dBm, a receive sensitivity of -94.4 dBm, a receive current of 8.8 mA, and a transmit current of 33.8 mA. The unit is housed in a 32-VFQFN exposed pad package.

Feature Summary

• Supports multiprotocol mesh networking including Bluetooth v5.1, Thread, and Zigbee
• Integrates ARM Cortex-M33 core with Secure Vault hardware security
• Optimized for low-power IoT applications with efficient active mode currents

Applications

• Zigbee and Thread mesh network nodes
• Bluetooth Low Energy gateways
• Smart home lighting controllers
• IoT voice assistants

Procurement Notes

Verify the specific suffix 'BR' against the manufacturer's official documentation to confirm packaging type, as some listings indicate tray packaging while others suggest tape and reel. Ensure the order matches the required storage capacity and GPIO count. Confirm RoHS compliance status and moisture sensitivity level requirements prior to procurement to align with assembly processes.

Selection Notes

Select this component when a balance of moderate memory size and high integration is required for 2.4 GHz wireless applications. The 768 kB flash and 64 kB RAM configuration suits complex protocol stacks without excessive cost. Consider the 10 dBm output power limit for short-range or line-of-sight deployments where higher power variants are unnecessary.

Part Context

This part belongs to the EFR32MG21 series, designed for line-powered and battery-operated IoT devices. It utilizes the Secure Vault technology for physical unclonable functions and secure key storage. The series targets applications requiring robust security and multiprotocol support in a compact form factor.

Replacement Considerations

Check for EFR32MG21A010F1024IM32-BR for increased memory capacity. Verify pin compatibility if substituting with other MG21 variants. Ensure software libraries are updated for any minor silicon revisions.

FAQ

What is the maximum data rate supported by this SoC?

The device supports a maximum data rate of 2 Mbps.

Does this component support simultaneous operation of multiple protocols?

Yes, it is designed for mesh multiprotocol operation, supporting Bluetooth, Thread, and Zigbee.