EFR32MG24A420F1536IM40-BR

Overview

The EFR32MG24A420F1536IM40-BR is a Silicon Labs RF System on Chip (SoC) from the MG24 series, designed for 2.4 GHz wireless applications. It integrates an ARM Cortex-M33 core operating at a maximum clock frequency of 78 MHz with a 32-bit data bus width. The device features 1536 kB of Flash program memory and 256 kB of RAM. It supports a maximum data rate of 2 Mbps and delivers a transmit output power of +20 dBm with a sensitivity of -94.4 dBm. Operating voltage ranges from 1.71 V to 3.8 V, and it functions within a temperature range of -40°C to +125°C. The component is housed in a QFN-40 package.

Feature Summary

• Integrates a high-performance 32-bit ARM Cortex-M33 processor with DSP instructions and floating-point unit for efficient signal processing.
• Supports multiple wireless protocols including Bluetooth Low Energy, Zigbee, Thread, Matter, and proprietary 2.4 GHz standards.
• Enables direction finding capabilities using Angle of Arrival (AoA) and Angle of Departure (AoD) techniques.
• Includes hardware acceleration for AI/ML tasks via a dedicated matrix vector processor.

Applications

• Smart home devices and lighting controls
• Medical IoT equipment requiring secure wireless connectivity
• Bluetooth mesh networks and BLE peripherals
• Matter and Thread enabled smart appliances

Procurement Notes

Verify the specific suffix BR indicates reel packaging when sourcing components. Confirm that the A420 designation corresponds to the +20 dBm output power variant and 1536 kB Flash capacity. Ensure compatibility with required 40 MHz crystal oscillators for proper operation. Check RoHS compliance status through official manufacturer documentation prior to integration into final products.

Selection Notes

Select this model when high transmit power up to +20 dBm is required alongside substantial memory resources for complex protocol stacks. The QFN-40 package offers a compact form factor suitable for space-constrained designs. Consider the extended industrial temperature range if deployment occurs in harsh environments. Evaluate power consumption profiles against application requirements given the varying current draw across different operational modes.

Part Context

This component belongs to the EFR32xG24 family, representing the fourth generation of Silicon Labs wireless SoCs. It succeeds previous generations by offering enhanced security features, improved radio performance, and greater computational power. The MG24 series specifically targets multi-protocol wireless applications, providing developers with a unified platform for various IoT standards without needing separate chips for different communication types.

Replacement Considerations

EFR32MG24A420F1536IM48 serves as a pin-compatible alternative with a QFN-48 package offering additional GPIOs. Lower power variants such as the EFR32MG24A010F1024IM40-BR provide reduced flash and RAM with lower output power. Cross-model selection requires verifying package dimensions and pinout compatibility during PCB redesign.