STMicroelectronics STM32WB05KZV6TR

Overview

STM32WB05KZV6TR from STMicroelectronics is an ultra-low-power dual-core wireless SoC integrating an Arm® Cortex®-M0+ MCU (64 MHz, 192 KB Flash, 24 KB RAM) and a BlueNRG co-processor for Bluetooth® Low Energy 5.4 operations. It delivers -104 dBm RX sensitivity at 125 kbps (Long Range), +8 dBm programmable TX output, and supports BLE mesh, direction finding (AoA/AoD), and isochronous streams (BIS/CIS) in industrial asset tracking and smart lighting systems.

For engineers reviewing the STM32WB05KZV6TR datasheet, STM32WB05KZV6TR pinout, STM32WB05KZV6TR application, or STM32WB05KZV6TR equivalent, key selection criteria include BLE 5.4 feature support (e.g., periodic advertising sync transfer, EATT, connection subrating), ultra-low-power Deepstop mode (0.8 µA with LSE), integrated SMPS regulator, hardware security accelerators (PKA, AES-128, RNG), and WLCSP36 package compatibility with IPD matching.

Technical Context

The device implements a partitioned BLE stack: time-critical PHY/MAC layers handled by the dedicated BlueNRG DMA-based coprocessor, while host stack and application logic run on the Cortex-M0+. Its RF subsystem uses a low-IF RX architecture with internal balun and supports simultaneous multi-role operation (e.g., central + peripheral).

Power management integrates three domains (VDD33, VDD12O, VDD12I), an SMPS step-down converter (programmable 1.2–1.9 V output), and LPREG enabling 0.8 µA Deepstop with LSE and BLE wakeup sources. Security includes hardware-accelerated ECC (521-bit), RSA, and ECDSA via PKA, plus flash read/write protection and SWD disable capability.

Key Specifications

Pinout & Package

STM32WB05KZV6TR is housed in a WLCSP36 (2.652 mm × 2.592 mm, 0.40 mm pitch) package with 20 GPIOs - all 5 V tolerant, retaining state in Deepstop, and supporting wakeup. The package integrates VSSRF ground connections requiring direct PCB ground plane bonding per ST layout guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Bluetooth Low Energy wireless SoC applications.

Compared with nRF52840 and CC2642R1, STM32WB05KZV6TR uniquely combines BLE 5.4 feature completeness (AoA, BIS, EATT), ultra-low-power Deepstop (0.8 µA), and hardware PKA for fast ECC - making it optimal for secure, long-life, mesh-capable IoT endpoints where firmware size and RF flexibility are constrained.

Availability

STM32WB05KZV6TR is available at Aetrix Electronics and suitable for industrial asset tracking, smart lighting control, fitness wearables, and medical remote monitors requiring stable component supply, long-term lifecycle assurance, and validated RF performance.

Supply support for STM32WB05KZV6TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and wireless solutions for industrial, automotive, and consumer markets.

The STM32WB series targets ultra-low-power wireless edge nodes, integrating BLE 5.4 and 2.4 GHz proprietary radio with Arm Cortex-M0+ to enable secure, battery-operated IoT devices with multi-year lifetimes and mesh scalability.

FAQ

What is the maximum BLE advertising packet size supported by STM32WB05KZV6TR?

The device supports Bluetooth 5.4 Advertising Extensions, enabling up to 1650 bytes of advertising data per event using periodic advertising with response and extended payload capabilities - sufficient for firmware version broadcasting, sensor metadata, and secure provisioning tokens without connection establishment.

Does STM32WB05KZV6TR require an external crystal for BLE operation?

No - it integrates trimming capacitors for the 32 MHz HSE and 32 kHz LSE oscillators, eliminating external load capacitors. The 32 kHz crystal is required for BLE sleep clock accuracy (<±50 ppm), while the 32 MHz crystal enables USB-free programming and high-speed flash access.

How is the +8 dBm RF output achieved without external PA?

The +8 dBm output is delivered directly from the integrated RF power amplifier stage, calibrated and controlled via internal LDO voltage adjustment. No external PA is needed for most PCB trace antennas; ST provides reference layouts and MLPF-NRG-01D3 IPD for optimized 50 Ω matching and harmonic filtering.

Can STM32WB05KZV6TR operate as both BLE central and peripheral simultaneously?

Yes - it supports up to 128 physical connections and concurrent multi-role operation (e.g., acting as BLE peripheral for sensor data collection while scanning as central for nearby beacons), enabled by hardware-accelerated BlueNRG coprocessor offloading timing-critical radio tasks from the Cortex-M0+.