EFR32MG21A010F1024IM32-B

Overview

The EFR32MG21A010F1024IM32-B is a Mighty Gecko wireless System on Chip (SoC) from Silicon Labs, designed for 2.4 GHz applications. It integrates an ARM Cortex-M33 processor with a maximum clock frequency of 80 MHz. The device features 1024 kB of flash program memory and 96 kB of RAM. It supports Bluetooth 5.1, Thread, and Zigbee protocols with mesh multiprotocol capabilities. The RF transceiver provides 10 dBm output power and -94.4 dBm sensitivity. Operating voltage ranges from 1.71 V to 3.8 V. It includes 20 GPIOs and interfaces such as I2C, SPI, UART, and I2S. The component is housed in a QFN-32 package.

Feature Summary

• Supports simultaneous operation of Bluetooth 5.1, Thread, and Zigbee protocols within a single chip architecture.
• Integrates a high-performance ARM Cortex-M33 core for efficient processing of complex wireless stack tasks.
• Features a robust 2.4 GHz radio with optimized power consumption for battery-operated devices.

Applications

• Smart home lighting and control systems
• Wireless sensor networks requiring Thread or Zigbee connectivity
• Bluetooth mesh enabled consumer electronics

Procurement Notes

Verify the specific suffix 'B' against the manufacturer's current datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure that the QFN-32 package dimensions align with your PCB footprint guidelines. Confirm that the operating temperature range of -40°C to +125°C meets your environmental specifications. Cross-reference the interface availability to ensure necessary peripherals are present for your application.

Selection Notes

Select this model when a balance of moderate memory capacity and multiprotocol support is required. The 1024 kB flash size accommodates larger firmware images compared to lower-tier variants. The Cortex-M33 core offers better security and performance than older M4 cores found in some previous generations. Consider this part for designs needing integrated Thread and Zigbee without external protocol controllers.

Part Context

This component belongs to the EFR32MG21 series, known as the Mighty Gecko family. It represents a significant upgrade over the MG1 series with improved radio performance and processing power. The MG21 series is widely adopted in IoT ecosystems due to its flexibility in supporting multiple wireless standards simultaneously. It serves as a central hub for smart building and home automation networks.

Replacement Considerations

Direct substitutes include other variants within the EFR32MG21 family such as the EFR32MG21A010F768IM32-B or EFR32MG21A010F512IM32-BR, depending on memory requirements. Ensure that any replacement maintains the same QFN-32 package and pin compatibility if board space is constrained.