Multiprotocol LPWAN 32-bit Arm Cortex-M4 MCUs, LoRa, (G)FSK, (G)MSK, BPSK, up to 256KB flash, 64KB SRAM
IC RF TxRx + MCU 802.15.4 LoRa™ 150MHz ~ 960MHz 73-UFBGA
The STM32WLE5JCI6 is an ultra-low-power wireless System-on-Chip (SoC) from STMicroelectronics that combines a 32-bit Arm Cortex-M4 microcontroller with an integrated sub-GHz radio transceiver. It is designed for long-range, low-power IoT and LPWAN applications such as smart metering, smart cities, industrial sensors, and remote monitoring systems.
It supports multiple modulation schemes including LoRa®, (G)FSK, (G)MSK, and BPSK, making it flexible for both proprietary and standardized wireless protocols like LoRaWAN®. The device integrates RF, analog, digital, and security features into a single chip to reduce external components and PCB size.
Key Features
Core & Performance
32-bit Arm® Cortex®-M4 core up to 48 MHz
DSP instructions and MPU support
Up to 256 KB Flash and 64 KB SRAM
Wireless Radio
Sub-GHz frequency range: 150 MHz – 960 MHz
Supports LoRa®, (G)FSK, (G)MSK, BPSK
High receiver sensitivity up to –148 dBm (LoRa mode)
Output power up to +22 dBm
Ultra-Low Power Operation
Supply voltage: 1.8 V – 3.6 V
Very low sleep currents (nA–µA range)
Optimized for battery-powered and energy-harvesting devices
Peripherals
Up to 43 GPIOs
ADC (12-bit), DAC, comparators
Multiple timers (16-bit and 32-bit)
Interfaces: SPI, I2C, UART/USART, LPUART, I2S
Security Features
Hardware AES-256 encryption
True Random Number Generator (TRNG)
Secure memory protection and unique device ID
System Integration
Integrated RF + MCU (highly reduced BOM)
OTA firmware update capability
Industrial temperature range (typically –40°C to +85°C / +105°C depending variant)
Summary
The STM32WLE5JCI6 is a highly integrated LoRa-capable MCU + RF transceiver SoC, optimized for long-range wireless communication with extremely low power consumption, making it ideal for IoT devices that must run for years on battery power.