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STM32WB55RG

STM32WB55RG

STMicroelectronics
If 2.4 GHz wireless (Bluetooth/Zigbee) is acceptable, this STM32WB-series wireless MCU is a comparable single-chip wireless option.
Active9,713 in stock
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Overview

The STM32WB55RG is a dual-core multiprotocol wireless microcontroller supporting Bluetooth 5.3, Zigbee, and Thread. It features an Arm Cortex-M4 for application logic and a dedicated Cortex-M0+ to manage the 2.4 GHz radio subsystem, ensuring timing-critical wireless tasks do not interfere with user software. With an integrated balun and a high-efficiency SMPS, it reduces BOM cost and PCB footprint for connected designs.

Why Choose This Part

The dual-core architecture provides hardware isolation between the radio stack and the application, enhancing security and system stability. It includes an integrated balun to simplify RF matching and an onboard SMPS to optimize power consumption during active wireless transmission.

Applications

Smart Home Hubs
Utilizes concurrent multiprotocol support to bridge Bluetooth LE devices with Zigbee or Thread mesh networks.
Industrial IoT Sensors
Leverages the -100dBm sensitivity and low-power modes for long-range, battery-operated monitoring.
Wearable Devices
Fits into compact form factors using the VFQFPN68 package while providing 1MB of Flash for complex firmware and 256kB SRAM.

Key Specifications

GPIO 49
Type TxRx + MCU
Protocol Bluetooth v5.3, Thread, Zigbee
Frequency 2.405GHz ~ 2.48GHz
Modulation GFSK
Memory Size 1MB Flash, 256kB SRAM
Sensitivity -100dBm
Mounting Type Surface Mount
Package / Case 68-VFQFN Exposed Pad
Power - Output 6dBm
Data Rate (Max) 2Mbps
Voltage - Supply 1.71V ~ 3.6V
Serial Interfaces ADC, I2C, SPI, UART, USART, USB
RF Family/Standard 802.15.4, Bluetooth
Current - Receiving 4.5mA ~ 7.9mA
Operating Temperature -40degC ~ 85degC (TA)
Current - Transmitting 5.2mA ~ 12.7mA
Supplier Device Package 68-VFQFPN (8x8)

Getting Started

Start development with the P-NUCLEO-WB55 pack, which includes a USB dongle and a Nucleo board. Use the STM32CubeWB MCU Package for drivers and middleware, and configure the radio stacks using the STM32CubeMX graphical initialization tool.

STM32WB55 Family

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

Part Number GPIO Package Stock
STM32WB55RG (this part) 49 VFQFN-68 9,713
STM32WB55CGU6 30 UFQFN-48 16,017
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