EFR32MG24A021F1024IM40-B

Overview

The EFR32MG24A021F1024IM40-B is a 2.4 GHz RF System-on-Chip from Silicon Labs, featuring an ARM Cortex-M33 core operating at 78 MHz. It integrates 1 MB of flash memory and 128 KB of RAM within a QFN-40 package. The device supports Bluetooth, Zigbee, Matter, and OpenThread protocols with a maximum data rate of 2 Mbps. Key electrical parameters include a supply voltage range of 1.71 V to 3.8 V, transmit power up to 19.5 dBm, and receive sensitivity of -94.4 dBm at 2 Mbps GFSK. Current consumption is 4.4 mA in receive mode and 156.8 mA in transmit mode at maximum output.

Feature Summary

• Supports multi-protocol wireless connectivity including Matter, OpenThread, Zigbee, and Bluetooth Low Energy.
• Integrates AI/ML hardware acceleration via a matrix-vector processor for efficient signal processing.
• Includes Secure Vault technology for enhanced IoT security against remote and local network attacks.
• Features direction finding capabilities using Angle of Arrival (AoA) and Angle of Departure (AoD).

Applications

• Smart home hubs and gateways
• Building automation sensors and switches
• Smart LED lighting and fixtures
• Smart door locks and access control
• Glass break detection and wake word detection systems

Procurement Notes

Verify the specific suffix 'B' indicates the extended temperature range up to +125°C and the use of an external crystal oscillator (XOUT). Confirm that the 128 KB RAM configuration matches the application requirements, as other variants in the MG24 series may offer higher memory capacities. Ensure the QFN-40 package footprint aligns with the PCB design constraints and thermal management strategy for high-power transmission scenarios.

Selection Notes

Select this component when high transmit power near 20 dBm is required alongside robust multi-protocol support for mesh networks. The 128 KB RAM limit necessitates careful memory management compared to 256 KB variants. Consider the 78 MHz CPU speed sufficient for standard protocol stacks but verify if additional DSP load requires higher clock speeds available in other family members.

Part Context

This part belongs to the EFR32MG24 Series 2, designed for demanding IoT applications requiring secure, low-power, and high-performance wireless connectivity. It complements the broader Mighty Gecko portfolio by offering advanced features like AI/ML acceleration and direction finding, targeting next-generation smart building and home automation solutions.

Replacement Considerations

Direct substitutes within the same package and pinout include other EFR32MG24 variants with different memory sizes or performance grades, such as those with 256 KB RAM. Cross-series migration to EFR32MG21 or EFR32MG29 requires schematic and firmware adaptation due to differences in I/O count, peripheral availability, and RF performance specifications.