STMicroelectronics STM32WL3x Low-Power Sub-GHz Wireless MCUs

STMicroelectronics STM32WL3x Low-Power Sub-GHz Wireless MCUs are designed to provide efficient long-range communication for IoT applications. Built on the Arm^® Cortex^®-M0+ core, these microcontrollers operate at up to 64MHz and integrate a sub-GHz dual radio, offering high flexibility and reduced bill of materials (BoM) costs. With up to 256K-bytes of flash memory and 32K-bytes of SRAM, the STM32WL3x line supports multiple modulation schemes, including 4-(G)FSK, (G)MSK, DBPSK, DSSS, OOK, and ASK. The main radio provides long-range connectivity with an RX sensitivity of up to -132dBm and a programmable TX power of up to +20dBm. Additionally, the dedicated wake-up radio ensures ultra-low power consumption, achieving down to 4.2μA in always-on mode. These features make the STM32WL3x MCUs ideal for applications such as smart homes, city infrastructure management, asset tracking, and various IoT devices.

Features

Built on the Arm Cortex-M0+ core
One single die in packages down to 5mm x 5mm integrating:
- 2x radios - sub-GHz multi-modulation radio and wide band wake-up radio
- LCD driver and LC sensor control for flow metering measurement
Simple and ultra flexible platform with multiple modulation support
- 4-(G)FSK up to 600Kbps, 2-(G)FSK, (G)MSK, DBPSK, DSSS, OOK, and ASK
- IQ interface to develop user modulations for even more flexibility
- Flexible radio packet handler
Main radio provides long-range connectivity with an RX sensitivity up to -132dBm and a programmable TX power up to +20dBm
Frequency coverage
- 159MHz to 185MHz
- 413MHz to 479MHz
- 826MHz to 958MHz

Low-power consumption radio down to 5.6mA (Rx) and 10mA (Tx at 10dBm full SoC current consumption)
Additional dedicated wake-up on radio with 4.2µA always-on receiver for system wake-up
Supports wide frequency bands from 100MHz to 2.4GHz
Extends battery life by reducing the power consumption of wireless applications (low power features)
Enables 10 years of battery life in many applications and the use of energy harvesting
Reduces the R&D development effort by using one single platform to support many communication protocols (excluding LoRa)
Optimizes the bill of materials (BOM), reducing the end device footprint and design complexity