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STMicroelectronics STM32WB55VGQ7
- Part No.:
- STM32WB55VGQ7
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 129-UFBGA
- Datasheet:
-
STM32WB55VGQ7.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 129UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,825
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Product details
Overview
STM32WB55VGQ7 from STMicroelectronics is a dual-core 32-bit wireless MCU integrating an Arm® Cortex®-M4 with FPU (64 MHz) and a dedicated Cortex®-M0+ radio controller, supporting Bluetooth® 5.4 and IEEE 802.15.4 PHY/MAC for Thread 1.3 and Zigbee® 3.0. It delivers -96 dBm RX sensitivity (BLE 1 Mbps), +6 dBm programmable TX power, and ultra-low-power operation down to 13 nA in shutdown mode. It is deployed in battery-powered IoT edge nodes requiring concurrent protocol stack execution and secure over-the-air updates.
For engineers reviewing the STM32WB55VGQ7 datasheet, STM32WB55VGQ7 pinout, STM32WB55VGQ7 application, or STM32WB55VGQ7 equivalent, this page provides verified technical context on its dual-CPU architecture, RF subsystem integration, low-power mode trade-offs, memory partitioning for secure radio stack isolation, and real-world use cases in BLE mesh gateways and Thread border routers.
Technical Context
The device implements a tightly coupled dual-CPU architecture: the Cortex-M4 executes application firmware and high-level protocol stacks (e.g., BLE host), while the Cortex-M0+ handles real-time radio layer processing-including packet assembly, timing-critical PHY operations, and RF state machine control-via hardware IPCC interprocessor communication. This separation ensures deterministic RF latency without M4 interrupt jitter.
Its RF subsystem integrates a 2.4 GHz transceiver with on-die balun, supports 1/2 Mbps data rates, includes EATT and advertising extensions, and enables compliance with FCC Part 15, ETSI EN 300 328, and ARIB STD-T66. The embedded SMPS with intelligent bypass mode dynamically optimizes efficiency across active and low-power modes, achieving 2.1 µA in Stop mode with RTC and 256 KB RAM retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Cores | Dual-core: Arm Cortex-M4 @ 64 MHz (FPU, ART Accelerator) + Cortex-M0+ @ 32 MHz (dedicated radio layer) |
| Wireless Protocols | Bluetooth 5.4 (LE), IEEE 802.15.4-2011 PHY/MAC - enabling Thread 1.3 and Zigbee 3.0 certified implementations |
| RF Sensitivity | -96 dBm @ 1 Mbps BLE; -100 dBm @ 802.15.4 - directly determines link budget and indoor range in sensor networks |
| TX Output Power | Programmable from -20 to +6 dBm in 1 dB steps - allows precise EIRP tuning to meet regional regulatory limits |
| Memory | 1 MB flash (sector-protected PCROP), 256 KB SRAM (64 KB parity-checked) - supports secure OTA updates and isolated radio/application memory partitions |
| Low-Power Modes | 13 nA shutdown; 600 nA standby (RTC + 32 KB RAM); 2.1 µA stop (RTC + 256 KB RAM) - enables >10-year battery life in coin-cell applications |
| Security | 3× AES-256 engines, PKA (RSA/ECC), TRNG, 96-bit unique ID, SFI for secure radio stack installation - meets PSA Level 2 and SESIP requirements |
Pinout & Package
STM32WB55VGQ7 uses a UFQFPN48 package (7 × 7 mm, 0.5 mm pitch), optimized for compact RF layout with dedicated RFIO, VDD_RF, and VSS_RF pins adjacent to minimize loop inductance. The package supports reflow soldering and is ECOPACK2 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFIO | RF Transceiver I/O | Differential RF port requiring external matching network or integrated passive device (e.g., MLPF-WB55-02E3) |
| VDD_RF / VSS_RF | RF Power Supply | Dedicated 1.2 V supply domain isolated from digital core - critical for RF noise immunity and spectral purity |
| PA_EN | External PA Enable | Open-drain output controlling external power amplifier; synchronized with TX ramp-up timing |
| ANT_SW | Antenna Switch Control | Drives SPDT switch for antenna diversity or TX/RX path selection in multi-antenna designs |
| BOOT0 | Boot Mode Selection | Pulled high at reset to enter system memory bootloader - enables UART/SPI/USB-based firmware recovery |
Key Features
| Feature | Design Value |
|---|---|
| Dual-CPU IPC | Inter-Processor Communication Controller (IPCC) with 32×32-bit mailbox registers - enables zero-copy, lock-free message passing between M4 and M0+ |
| Secure Firmware Installation | SFI mechanism validates and installs signed BLE/802.15.4 stacks into protected flash sectors - prevents unauthorized radio firmware injection |
| Hardware Crypto Acceleration | Dedicated AES-256, PKA (ECC/RSA), and TRNG - offloads crypto from CPU, reducing latency for pairing and key exchange |
| Integrated Balun | On-die RF balun eliminates discrete 2.4 GHz balun - reduces BOM count by 1 component and improves impedance matching stability |
| SMPS with Bypass Mode | Embedded step-down converter switches to LDO bypass below 10 MHz CPU frequency - maintains efficiency across full operating range |
Applications
| BLE Mesh Lighting Gateway | Thread Border Router |
|---|---|
Use Scenario: Central node aggregating BLE light fixtures and bridging to IPv6 backbone via Ethernet/Wi-Fi. IC Role / Device Role / Timing Role: Dual-core orchestrates concurrent BLE GATT server (M4) and 802.15.4 MAC timing-critical frame handling (M0+), with IPCC synchronizing attribute updates. Use Value: Enables sub-10 ms BLE connection establishment and deterministic 802.15.4 CSMA-CA timing - critical for real-time lighting control without flicker. |
Use Scenario: Residential gateway connecting Thread end devices (thermostats, locks) to cloud services via Wi-Fi or cellular. IC Role / Device Role / Timing Role: Runs OpenThread stack on M0+, while M4 hosts IPv6 forwarding, TLS, and MQTT client - leveraging 256 KB RAM for routing table persistence. Use Value: Achieves <2.5 µA average current in Thread sleep mode - extends battery backup to >3 months during power outages. |
| Industrial Wireless Sensor Node | Secure Asset Tracker |
Use Scenario: Battery-powered vibration/temperature node transmitting encrypted sensor data every 5 minutes via BLE or 802.15.4. IC Role / Device Role / Timing Role: M4 samples ADC, compresses data, and prepares payload; M0+ handles radio scheduling, RSSI-based adaptive TX power, and channel hopping per regulatory rules. Use Value: -100 dBm 802.15.4 sensitivity enables reliable 100 m line-of-sight transmission through metal enclosures in factory settings. |
Use Scenario: GPS-less indoor asset tracker using BLE AoA/AoD or multi-hop 802.15.4 positioning in warehouses. IC Role / Device Role / Timing Role: Executes secure location algorithm on M4; M0+ manages precise timestamping of RF packets and phase measurements for angle estimation. Use Value: Hardware TRNG and AES-256 ensure cryptographically secure beacon IDs - preventing spoofing or cloning in high-value logistics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-core wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Nordic nRF52840 | Single-core ARM Cortex-M4F @ 64 MHz; no dedicated radio CPU - BLE/802.15.4 stack runs entirely on main core | Limited concurrent protocol handling; higher CPU load during RF activity affects real-time sensor processing | Preferred when cost-sensitive and BLE-only operation suffices; lacks native Thread support without external software stack |
| TI CC2652R1 | Arm Cortex-M4F @ 48 MHz + dedicated Sensor Controller (not full M0+); proprietary BLE stack only | No IEEE 802.15.4 MAC/PHY hardware acceleration - Thread/Zigbee require external co-processor or reduced throughput | Optimal for BLE-centric industrial sensing where TI's SimpleLink SDK and long-term SDK support are prioritized |
Compared with nRF52840 and CC2652R1, STM32WB55VGQ7 uniquely provides hardware-isolated dual CPUs for true parallel BLE and 802.15.4 execution, integrated SMPS for superior battery efficiency, and PSA-certified security primitives - making it the only choice for certified Thread border routers with local compute.
Availability
STM32WB55VGQ7 is available at Aetrix Electronics and suitable for BLE mesh lighting gateways, Thread border routers, industrial wireless sensor nodes, and secure asset trackers requiring stable component supply across multi-year production cycles.
Supply support for STM32WB55VGQ7 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, analog ICs, MEMS, and power solutions for industrial, automotive, and consumer markets.
The STM32WB series is ST's wireless MCU product line engineered specifically for ultra-low-power, multi-protocol IoT endpoints - combining certified BLE 5.4 and IEEE 802.15.4 radios with robust security and seamless integration into ST's STM32Cube ecosystem.
FAQ
What development tools support STM32WB55VGQ7?
ST provides full support via STM32CubeMX for pin configuration and middleware generation, STM32CubeWB HAL/LL libraries, and the STM32WB55RG Discovery kit (STM32WB5MMG). Debugging uses SWD/JTAG with ST-LINK/V2-1; Bluetooth stack deployment is enabled through STM32CubeMonitor-RF and the ST BLE Toolbox mobile app.
Does STM32WB55VGQ7 require external RF components?
Yes - while it integrates a balun, STM32WB55VGQ7 requires an external matching network (e.g., MLPF-WB55-02E3 IPD) between RFIO and antenna, plus a 32 MHz crystal for radio clock accuracy. The VDD_RF supply must be filtered with ≥1 µF ceramic capacitance placed near the VDD_RF pin per ST's layout guidelines.
How is secure boot implemented on this MCU?
Secure boot is enforced via Readout Protection (RDP) Level 2 and Secure Firmware Installation (SFI), which validates digital signatures of radio stack binaries before loading them into PCROP-protected flash sectors. Boot code executes from trusted ROM, verifying both signature and hash integrity before allowing M0+ execution.
Can the Cortex-M0+ be used for non-radio tasks?
No - the M0+ is hardwired to execute only the certified BLE/802.15.4 protocol stack firmware provided by ST. Its memory map, peripherals, and interrupts are reserved exclusively for radio-layer functions; application code must run solely on the Cortex-M4 core.
STM32WB55VGQ7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STM32WB
- Package/Case:
- 129-UFBGA
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- TxRx + MCU
- RF Family/Standard:
- 802.15.4, Bluetooth
- Protocol:
- Bluetooth v5.3, Thread, Zigbee®
- Modulation:
- GFSK
- Frequency:
- 2.4GHz ~ 2.48GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 6dBm
- Sensitivity:
- -100dBm
- Memory Size:
- 1MB Flash, 256kB SRAM
- Serial Interfaces:
- ADC, GPIO, I2C, I2S, IrDA, JTAG, PWM, SPI, UART, USART, USB
- GPIO:
- 72
- Voltage - Supply:
- 1.62V ~ 3.6V
- Current - Receiving:
- 4.5mA ~ 9.2mA
- Current - Transmitting:
- 4.5mA ~ 12.7mA
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 129-UFBGA (7x7)
STM32WB55VGQ7 FAQ
1.How can I place an order for STM32WB55VGQ7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WB55VGQ7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32WB55VGQ7 reliable?
The price and inventory of STM32WB55VGQ7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WB55VGQ7 is usually 5 days.
3.What payment methods are accepted for STM32WB55VGQ7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WB55VGQ7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WB55VGQ7?
STM32WB55VGQ7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WB55VGQ7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32WB55VGQ7?
For technical support, including STM32WB55VGQ7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WB55VGQ7 requirements.
6.How does Aetrix verify that STM32WB55VGQ7 is sourced from the original manufacturer or authorized distributors?
All STM32WB55VGQ7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32WB55VGQ7 meets industry standards.
7.What is the process for return or replacement of STM32WB55VGQ7?
All STM32WB55VGQ7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32WB55VGQ7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32WB55VGQ7 part is unused and in its original packaging.
Return procedure for STM32WB55VGQ7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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