STM32WB35CCU6ATR

Product Overview

STM32WB35CCU6ATR is an ultra-low-power wireless microcontroller from STMicroelectronics, built for connected embedded products that need both application processing and 2.4 GHz radio communication in one compact IC. It combines an Arm Cortex-M4 application core running up to 64 MHz with a dedicated Arm Cortex-M0+ core for real-time radio and low-layer wireless operation, helping designers separate application firmware from wireless protocol handling.

This device is part of the STM32WB35CC family and is suitable for Bluetooth Low Energy, IEEE 802.15.4, Zigbee, Thread and Matter-related designs. Compared with using a separate MCU and radio, STM32WB35CCU6ATR can simplify the BOM, reduce board area and improve firmware integration for smart-home nodes, wireless sensors, industrial monitoring devices, gateways, lighting controls and battery-powered IoT products.

Key Features

• Manufacturer: STMicroelectronics

• Part Number: STM32WB35CCU6ATR

• Device Type: Ultra-low-power wireless microcontroller / RF transceiver SoC

• CPU Architecture: Dual-core Arm design with Cortex-M4 application core and Cortex-M0+ radio/network core

• Core Frequency: Cortex-M4 up to 64 MHz; Cortex-M0+ up to 32 MHz

• Wireless Protocol Support: Bluetooth LE 5.4, IEEE 802.15.4, Zigbee, Thread and Matter ecosystem support

• Memory: 256 Kbytes Flash memory, with STM32WB35xx family SRAM support up to 96 Kbytes depending on device configuration

• Security and Cryptography: AES-256 support, hardware security features, PKA and RNG resources for wireless and embedded security functions

• Interfaces: USB 2.0 FS, USART, LPUART, I2C, SPI, Quad-SPI and other STM32 peripheral resources for sensor, memory and host communication

• Analog / Timing Resources: 12-bit ADC, ultra-low-power comparators, RTC, 16-bit and 32-bit timers for embedded control and sensing designs

• Package: UFQFPN 48, 7 × 7 × 0.55 mm

• Grade / Compliance: Industrial grade, Ecopack2, active production status according to ST product information

• Design Review Notes: Verify RF matching layout, antenna design, wireless stack version, region-specific channel plan, power profile and ordering suffix before production release

Applications

STM32WB35CCU6ATR is well suited for smart-home devices, wireless sensor nodes, connected lighting, industrial IoT modules, metering equipment, building automation, access control, asset tracking, remote monitoring products and compact battery-powered devices that need integrated MCU control and 2.4 GHz wireless connectivity.

It is especially useful in designs where protocol support, low-power operation, security features and long-term firmware maintainability are more important than simply adding a standalone RF transceiver. Buyers replacing or continuing an existing design should check the exact ST ordering code, package footprint, RF layout recommendations, stack compatibility and lifecycle status before approval.

Quality & Sourcing

Antrex Electronics can support STM32WB35CCU6ATR sourcing with stock availability checks, RFQ quotation, date code review, package confirmation and shipment arrangement. For wireless MCU purchasing, buyers can provide target quantity, acceptable date code, packaging preference, required protocol stack, application market and inspection requirements for faster quotation support.

For quality control, Antrex Electronics can help arrange product photos, label review, visual inspection and third-party testing support when required. OEMs, EMS providers, IoT device makers, wireless module manufacturers and repair teams are welcome to send BOM lists or hard-to-find STM32WB series requests for sourcing assistance.