EFR32SG28B322F1024IM68-AR

Overview

The EFR32SG28B322F1024IM68-AR is a dual-band wireless System on Chip (SoC) from Silicon Labs, designed for high-performance IoT applications. It integrates an ARM Cortex-M33 core operating at up to 78 MHz with 1024 kB of Flash memory and 256 kB of RAM. The device supports Sub-GHz and 2.4 GHz radio frequencies, featuring a maximum output power of +20 dBm and a sensitivity of -108.6 dBm at 915 MHz. It includes a Secure Vault High security module, AI/ML hardware acceleration, and interfaces such as I2C, SPI, and UART within a QFN-68 package.

Feature Summary

• Dual-band radio operation supporting both Sub-GHz and 2.4 GHz bands for versatile connectivity.
• Integrated Secure Vault High security module providing robust protection against remote and local attacks.
• AI/ML hardware accelerator enabling efficient edge computing for resource-intensive applications.
• High-performance ARM Cortex-M33 processor with significant memory capacity for complex protocol stacks.

Applications

• Amazon Sidewalk compatible devices requiring long-range sub-GHz connectivity
• Smart home sensors and actuators utilizing Bluetooth Low Energy
• Building automation systems needing reliable multi-protocol communication
• Security and access control devices requiring enhanced data encryption

Procurement Notes

Verify the specific suffix 'AR' indicates the reel packaging format when sourcing components. Confirm that the B322 variant aligns with required Sub-GHz frequency bands for your target region. Ensure design compatibility with the QFN-68 thermal pad requirements for optimal heat dissipation during high-power transmission operations.

Selection Notes

Select this model when dual-band coverage is essential for extending network reach beyond standard 2.4 GHz limitations. The combination of high flash memory and dedicated AI accelerators suits applications processing sensor data locally. Consider the secure vault features for deployments handling sensitive user data or critical infrastructure monitoring.

Part Context

This component belongs to the EFR32 SG28 family, representing Silicon Labs' advanced series for smart gecko applications. It builds upon previous generations by adding machine learning capabilities and enhanced security modules. The part is positioned for demanding IoT environments requiring both range and computational efficiency.

Replacement Considerations

EFR32SG28B322F1024IM68-A

FAQ

What security features are integrated into this SoC?

The device includes the Secure Vault High module, which protects wireless data and the device itself from remote and local attacks.

Does this chip support Amazon Sidewalk?

Yes, the EFR32SG28 series is specifically designed to support Amazon Sidewalk protocols using dual-band connectivity.