Silicon Labs EFR32FG25 Flex Gecko Wireless SoCs

Silicon Labs EFR32FG25 Flex Gecko Wireless SoCs is an ideal solution for sub-GHz Wi-SUN® applications in metering, lighting, and distribution automation. The Silicon Labs EFR32FG25 features a high-performance sub-GHz radio and long-range connectivity. The SoCs are not affected by interference from 2.4GHz technologies. The single-die, multi-core design offers security, high throughput, and an integrated power amplifier, making it the perfect choice for secure IoT device connectivity.


  • 32-bit Arm® Cortex®-M33 core with 97.5MHz maximum operating frequency
  • Up to 1920kB of flash and 512kB of RAM
  • Wi-SUN multi-rate OFDM, FSK, and OQPSK modulations
  • Integrated PA with up to 16dBm (sub-GHz) TX power
  • Robust peripheral set and up to 37 GPIO
  • Operation up to 125°C


  • Smart electric metering
  • Street lighting
  • Distribution automation
  • Industrial applications
  • Municipal infrastructure


Block Diagram

Silicon Labs EFR32FG25 Flex Gecko Wireless SoCs
Published: 2023-02-07 | Updated: 2023-07-11