EmbeddedRelated.com
The 2026 Embedded Online Conference
    Parts    STM32WL55CCU6
STM32WL55CCU6

STM32WL55CCU6

STMicroelectronics
STM32WL family offers an integrated Cortex-M MCU with Sub-GHz radio (LoRa/FSK) as an alternative for developers preferring the STM32 ecosystem.
Active1,161 in stock
Datasheet Digi-Key Compare Prices

Overview

The STM32WL55CCU6 is a dual-core Arm Cortex-M4 and Cortex-M0+ microcontroller from STMicroelectronics, integrating a sub-GHz radio transceiver. It supports multiple modulation schemes, including LoRa, FSK, GFSK, and BPSK, making it suitable for a wide range of low-power wireless applications. This MCU combines a robust processing unit with an RF front-end, simplifying the design of IoT devices requiring long-range communication.

Why Choose This Part

Engineers benefit from the STM32WL55CCU6's high level of integration, combining an Arm Cortex-M4 and Cortex-M0+ MCU with a sub-GHz radio for LoRa and other modulations. Its robust security features, including hardware encryption (AES 256-bit) and a true random number generator (RNG), protect sensitive data. The extensive range of low-power modes (down to 31 uA in Shutdown) and efficient core operation at up to 48 MHz (Cortex-M4) ensures prolonged battery life for remote applications.

Applications

LoRaWAN End Devices
Ideal for battery-powered LoRaWAN nodes due to its integrated LoRa radio and extensive low-power modes, enabling long battery life for remote sensors and trackers.
Smart Agriculture Sensors
Used in smart farming applications for monitoring soil conditions, weather, and livestock, leveraging the long-range sub-GHz communication capabilities.
Industrial IoT (IIoT) Sensors
Suitable for wireless sensor networks in industrial environments, providing robust and secure data transmission for asset tracking, predictive maintenance, and environmental monitoring.
Smart City Infrastructure
Enables connectivity for smart street lighting, waste management sensors, and utility metering with its efficient sub-GHz radio and low-power operation.
Asset Tracking Systems
Its integrated radio and low-power consumption make it well-suited for devices that track assets over long distances without frequent battery replacement.

Key Specifications

GPIO 29
Type TxRx + MCU
Protocol LoRaWAN 1.0, Sigfox
Frequency 150MHz ~ 960MHz
Modulation BPSK, GFSK, GMSK, FSK, MSK
Memory Size 256kB Flash
Sensitivity -148dBm
Mounting Type Surface Mount
Package / Case 48-UFQFN Exposed Pad
Power - Output 22dBm
Data Rate (Max) 300kbps
Voltage - Supply 1.8V ~ 3.6V
Serial Interfaces ADC, GPIO, I2C, SPI, IrDA, UART, USART
RF Family/Standard 802.15.4
Current - Receiving 4.82mA
Operating Temperature -40degC ~ 85degC (TA)
Current - Transmitting 21mA ~ 120mA
Supplier Device Package 48-UFQFPN (7x7)

Getting Started

To begin development with the STM32WL55CCU6, engineers can utilize STMicroelectronics' comprehensive STM32Cube ecosystem, including the STM32CubeIDE for development and debugging. Evaluation boards like the NUCLEO-WL55JC provide a quick start with an integrated debugger. The STM32CubeMX tool can assist in configuring peripherals and generating initialization code, accelerating project setup.

STM32WL55 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number GPIO Package Stock
STM32WL55CCU6 (this part) 29 UFQFN-48 1,161
STM32WL55JC 43 UFBGA-73 2,880
Also available as: STM32WL55JCY6TR

Also Consider

RFM95W-868S2 HopeRF - A standalone LoRa transceiver module that can be paired with any host microcontroller, offering flexibility for custom designs where an integrated MCU is not preferred.
The 2026 Embedded Online Conference