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EFR32MG21A020F1024IM32-B

SiLEFR32MG21A020F1024IM32-B

Silicon Labs
IC RF TxRx + MCU Bluetooth Bluetooth v5.1, Thread, Zigbee® 2.4GHz 32-VFQFN Exposed Pad
Active1,954 in stock
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Overview

The EFR32MG21A020F1024IM32-B is a high-performance Wireless SoC from the Mighty Gecko Series 2 family, designed for mesh networking. It integrates an 80MHz ARM Cortex-M33 core with a 2.4GHz radio capable of +20dBm output power, supporting Bluetooth 5.1, Zigbee, and Thread protocols. This device is optimized for line-powered IoT applications that require robust security and high-performance wireless links.

Why Choose This Part

This SoC offers a significant link budget with -104.9dBm sensitivity and +20dBm output power, reducing the need for external power amplifiers. Its dedicated security core provides hardware-accelerated crypto, Secure Boot, and Anti-Tamper features to protect intellectual property and user data. The 1024kB Flash and 96kB RAM provide ample headroom for complex multiprotocol stacks and over-the-air updates.

Applications

Smart Lighting Control
Utilizes the high +20dBm output power and Zigbee mesh capabilities to manage large-scale indoor lighting networks with high reliability.
Connected Home Gateways
Serves as a multiprotocol hub, bridging Bluetooth 5.1, Thread, and Zigbee devices to local networks.
Building Automation
Leverages the ARM TrustZone and Secure Vault features for secure control of HVAC and access systems in commercial environments.

Key Specifications

GPIO 20
Type TxRx + MCU
Protocol Bluetooth v5.1, Thread, Zigbee
Frequency 2.4GHz
Modulation GFSK, O-QPSK
Memory Size 1024kB Flash, 96kB RAM
Sensitivity -104.9dBm
Mounting Type Surface Mount
Package / Case 32-VFQFN Exposed Pad
Power - Output 20dBm
Data Rate (Max) 2Mbps
Voltage - Supply 1.71V ~ 3.8V
Serial Interfaces ADC, GPIO, I2C, I2S, SPI, UART
RF Family/Standard Bluetooth
Current - Receiving 8.8mA
Operating Temperature -40degC ~ 125degC
Current - Transmitting 33.8mA
Supplier Device Package 32-QFN (4x4)

Getting Started

Start development using the Simplicity Studio 5 IDE which includes the Silicon Labs GSDK and network analyzer tools. For hardware evaluation, the SLWSTK6006A Wireless Starter Kit provides a plug-and-play environment for the EFR32MG21 series. The integrated Peripheral Reflex System (PRS) allows for autonomous interaction between peripherals, optimizing power efficiency during application development.

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
EFR32MG21A020F1024IM32-B (this part) 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 nRFNordic Semiconductor - A widely adopted alternative for Zigbee and Thread that includes integrated USB 2.0 support.

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