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EFR32MG21B020F512IM32-B

SiLEFR32MG21B020F512IM32-B

Silicon Labs
RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 20dB, mesh multiprotocol, 512kB, 64kB(RAM), 20 GPIO
1,787 in stock
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Overview

The EFR32MG21B020F512IM32-B is a Silicon Labs Mighty Gecko 2.4 GHz wireless System-on-Chip that combines an ARM Cortex-M microcontroller and an integrated 2.4 GHz radio in a QFN32 package. It ships with 512 kB of flash, 64 kB of RAM and about 20 GPIOs, and is designed for mesh multiprotocol wireless applications. The device targets battery-powered and networked edge nodes that require an integrated RF/MCU solution.

Why Choose This Part

This part integrates a Cortex-M class MCU and a 2.4 GHz radio in a single QFN32 package, lowering BOM and board area compared with separate MCU and transceiver parts. The 512 kB flash and 64 kB RAM provide headroom for network stacks, OTA firmware and application code. Silicon Labs offers a mature SDK and development ecosystem, which speeds time-to-market for mesh and multiprotocol designs.

Applications

Smart lighting and switches
End nodes and mains-powered controllers in Zigbee/Thread/Bluetooth mesh lighting networks where an integrated RF MCU reduces BOM and simplifies firmware updates.
Battery-powered wireless sensors
Temperature, humidity, occupancy and environmental sensors needing low-power sleep modes and a compact radio-enabled MCU.
Home automation hubs and bridges
Gateway or bridge nodes that run mesh networking stacks and coordinate multiple 2.4 GHz devices.
Actuators and motor controllers for IoT
Small actuators and relay controllers that require local decision-making plus wireless connectivity for mesh networks.

Getting Started

Use Silicon Labs Simplicity Studio and the Gecko SDK for development; the SDK includes example projects and reference designs for mesh/multiprotocol use cases. Silicon Labs provides Mighty Gecko evaluation and starter kits to prototype hardware; standard toolchain support includes GCC, IAR and Keil. Consult the product datasheet and release notes in Simplicity Studio for package, pinout and radio regulatory guidance.

Part of Silicon Labs EFR32 / EFM32 family » EFR32MG21

EFR32MG21 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Memory Interfaces Frequency Modulation RF Family/Standard Rx Current Stock
EFR32MG21B020F512IM32-B (this part) — — — — — — 1,787
EFR32MG21A020F1024IM32-B 1024k ADC, GPIO, I2C, I2.. 2.4GHz GFSK, O-QPSK Bluetooth 8.8mA 1,954
EFR32MG21B020F1024IM32-B 1MB I2C, I2S, SPI, IrD.. 2.4GHz DSSS, GFSK, O-QPSK 802.15.4, Bluetooth 8.8mA 2,302
EFR32MG21A020F768IM32-B 768k ADC, GPIO, I2C, I2.. 2.4GHz GFSK, O-QPSK Bluetooth 8.8mA 405
Also available as: EFR32MG21A020F1024IM32-BR, EFR32MG21A010F1024IM32-BR, EFR32MG21B010F1024IM32-BR, EFR32MG21A020F768IM32, EFR32MG21B020F1024IM32-BR, EFR32MG21B010F512IM32-B, EFR32MG21

Also Consider

nRF52840-QIAA-R nRFNordic Semiconductor - Widely used 2.4 GHz multiprotocol SoC with larger memory and strong mesh support.