Introducing the EFR32FG23L Sub-GHz Wireless SoC Series

Introducing the EFR32FG23L Sub-GHz Wireless SoC Series

As the official distributor for Silicon Labs, I’m pleased to present the EFR32FG23L — a new line of ultra-low-power, cost-optimized Sub-GHz wireless SoCs created for today’s IoT and wireless sensor applications.

Why EFR32FG23L?

The FG23L series is engineered to deliver strong RF performance and energy efficiency with a streamlined memory configuration. This balance makes it ideal for low-cost, battery-powered devices that still demand reliability and long range.

Key capabilities include:

• Multi-core, single-die design with integrated power amplifier for excellent link budget and fast wake-up performance
• 128 kB flash and 32 kB RAM, tailored for lightweight, proprietary wireless protocols
• Sub-GHz operation across license-free ISM bands, with transmit power up to +20 dBm
• Low current consumption in receive mode across multiple modulation types and frequencies
• A versatile peripheral set: ADCs, DACs, timers, sensor interfaces, communication interfaces, and up to 23 configurable GPIOs
• Suitable for applications in home and industrial automation, smart cities, remote sensing, and secure wireless control

Efficiency, Range, and Security

The FG23L series achieves long-range communication while keeping active and sleep current extremely low. In many designs, it can deliver up to twice the range compared to similar-class SoCs.

Security is an integral part of the platform, with features such as Secure Vault, secure boot, and hardware-based cryptographic acceleration to protect firmware, data, and communication.

Device Example and Availability

A representative device in the lineup, such as the EFR32FG23L010F128GM40, features a 78 MHz ARM Cortex-M33 core alongside the same 128 kB flash, 32 kB RAM, integrated security elements, and Sub-GHz RF capabilities.

General availability for the FG23L family is scheduled to begin on September 30, 2025, and development kits are already accessible through distribution.

Ideal Applications

Thanks to its optimized memory footprint, robust radio, and low energy usage, the FG23L series is well-suited for:

• Battery-powered sensor nodes
• Smart building and smart city devices
• Asset tracking and telemetry
• Remote controls and key fobs
• Long-range, low-power IoT endpoints

In Summary

The EFR32FG23L Sub-GHz SoC family offers designers a secure, efficient, and cost-effective platform for next-generation wireless devices. With strong RF capabilities, built-in security, and low power consumption, it’s an excellent fit for compact and battery-powered IoT products.

As your official distributor, I’m ready to support your projects with samples, documentation, development tools, and integration guidance. If you’d like to explore the FG23L series for your application, feel free to reach out.

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