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STMicroelectronics STM32WB55VEQ7
- Part No.:
- STM32WB55VEQ7
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 129-UFBGA
- Datasheet:
-
STM32WB55VEQ7.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 129UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:7,478
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Product details
Overview
STM32WB55VEQ7 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 (Thread 1.3, Zigbee® 3.0), with -96 dBm BLE RX sensitivity, +6 dBm programmable TX power, and integrated balun. It targets secure, ultra-low-power IoT edge nodes such as smart sensors and wireless gateways.
For engineers reviewing the STM32WB55VEQ7 datasheet, STM32WB55VEQ7 pinout, STM32WB55VEQ7 application, or STM32WB55VEQ7 equivalent, key selection criteria include dual-CPU real-time radio coexistence, RF regulatory compliance (FCC/ETSI/ARIB), OTA update capability, and hardware-accelerated crypto (AES-256, PKA, RNG).
Technical Context
The device implements a tightly coupled dual-CPU architecture: the M4 executes application firmware while the M0+ handles real-time Bluetooth LE and 802.15.4 protocol stack processing via IPCC interprocessor communication. Radio subsystem includes integrated balun, RSSI measurement, advertising extensions, and EATT support.
Power management combines an embedded SMPS with intelligent bypass mode, five BOR thresholds, and ultra-low-power modes: 13 nA shutdown, 600 nA standby + RTC + 32 KB RAM, and 2.1 µA stop + RTC + 256 KB RAM - enabling multi-year battery life in sensor endpoints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Cores | Dual-core: Arm Cortex-M4 @ 64 MHz (FPU, ART Accelerator) + Cortex-M0+ for real-time radio stack execution |
| Wireless Protocols | Bluetooth 5.4 (LE), IEEE 802.15.4-2011 PHY/MAC - enabling Thread 1.3 and Zigbee 3.0 certified deployments |
| RF Sensitivity | -96 dBm @ 1 Mbps BLE, -100 dBm @ 802.15.4 - ensures robust link budget in noisy industrial environments |
| TX Output Power | Programmable from -20 to +6 dBm in 1 dB steps - supports range vs. power trade-off tuning without external PA |
| Memory | 512 KB flash (sector PCROP protection), 256 KB SRAM (64 KB with hardware parity) - sufficient for concurrent application + radio stack |
| Security | 3× AES-256 engines, HW PKA (RSA/ECC/DH), TRNG, 96-bit unique ID, SFI-secured OTA updates - meets PSA Level 2 and SESIP requirements |
| Low-Power Modes | 13 nA shutdown, 600 nA standby + RTC + 32 KB RAM - enables coin-cell operation for maintenance-free sensor nodes |
Pinout & Package
STM32WB55VEQ7 is housed in a UFBGA129 package (0.5 mm pitch, 7 × 7 mm body), optimized for compact RF layout and thermal performance in space-constrained IoT modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_RF | RF power supply | Dedicated 1.2 V supply for RF transceiver - isolates noise-sensitive analog RF section from digital core |
| ANT | RF antenna interface | Differential RF output (PA/LNA) routed to integrated balun - eliminates external matching network in basic designs |
| OSC_IN / OSC_OUT | 32 MHz crystal oscillator | High-precision clock source for RF timing and CPU synchronization - supports ±20 ppm stability with internal trimming capacitors |
| VBAT | Backup power supply | Enables RTC and 32 KB backup RAM retention during main power loss - critical for time-stamped sensor logging |
| NRST | Active-low reset input | Asynchronous reset pin with Schmitt trigger - ensures reliable recovery from brownout or software lockup |
Key Features
| Feature | Design Value |
|---|---|
| Dual-CPU IPC | Inter-Processor Communication Controller (IPCC) enables deterministic, low-latency message passing between M4 and M0+ - essential for synchronized BLE connection events and application logic |
| Hardware Crypto | Three independent AES-256 accelerators plus Public Key Accelerator (PKA) offload encryption/decryption and key exchange - reduces M4 load by >90% vs. software-only TLS |
| Integrated Balun | On-die RF balun eliminates need for discrete matching components - cuts BOM cost and PCB area by ~30% in 2.4 GHz reference designs |
| OTA Update Support | Secure Firmware Installation (SFI) enables authenticated, encrypted over-the-air updates for both application and radio stack - prevents unauthorized firmware injection |
| Ultra-Low-Power Timers | Two 16-bit ultra-low-power timers (LPTIM1/LPTIM2) operate in Stop mode at < 1 µA - ideal for periodic sensor sampling without waking the CPU |
Applications
| Smart Building Sensor Node | Industrial Wireless Gateway |
|---|---|
Use Scenario: Battery-powered temperature/humidity/motion sensor deployed in HVAC ducts or lighting fixtures. IC Role / Device Role / Timing Role: Dual-core MCU performs local sensor fusion, BLE advertising, and 802.15.4 mesh forwarding; M0+ handles real-time radio timing. Use Value: 600 nA standby current + RTC extends 2xAA battery life beyond 5 years; integrated balun simplifies FCC-certified antenna layout. | Use Scenario: DIN-rail mounted gateway aggregating data from 50+ BLE/Thread/Zigbee end devices in factory automation. IC Role / Device Role / Timing Role: Acts as concurrent multi-protocol bridge: BLE for commissioning, 802.15.4 for mesh routing, USB for backhaul - managed across dual CPUs. Use Value: Hardware crypto engines enable TLS 1.2 tunneling to cloud without CPU overhead; 256 KB SRAM buffers bursty sensor traffic during network outages. |
| Medical Wearable Tracker | Asset Tracking Tag |
Use Scenario: CE-certified wrist-worn vital sign monitor transmitting encrypted PPG/ECG data via BLE to smartphone or hub. IC Role / Device Role / Timing Role: M4 runs medical algorithm and BLE GATT server; M0+ manages connection intervals, ATT caching, and EATT for efficient bulk transfers. Use Value: Secure firmware installation (SFI) ensures only signed medical firmware executes; 96-bit unique ID enables device-level traceability per IEC 62304. | Use Scenario: GPS-less indoor/outdoor logistics tag using BLE direction finding (AoA/AoD) and 802.15.4 geofencing. IC Role / Device Role / Timing Role: Real-time radio controller maintains precise timing for angle-of-arrival measurements; M4 fuses RSSI, accelerometer, and battery telemetry. Use Value: -96 dBm BLE sensitivity + accurate RSSI enables sub-meter AoA accuracy; 13 nA shutdown mode preserves CR2032 charge during shipment idle periods. |
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 DK | Single-core ARM Cortex-M4F @ 64 MHz; no dedicated radio CPU - BLE/802.15.4 stack runs on same core, increasing latency under load | Limited to BLE + Thread (no Zigbee 3.0 native stack); lacks hardware PKA and SFI-secured OTA | Preferred for BLE-only cost-sensitive designs where dual-CPU determinism is not required |
| TI CC2652R1 | Arm Cortex-M4F @ 48 MHz + dedicated Sensor Controller; supports BLE 5.0 and IEEE 802.15.4 but no Zigbee 3.0 certification path | No integrated SMPS - requires external DC/DC; lower RF output (+5 dBm max) and weaker RX sensitivity (-96.5 dBm) | Suitable when TI's SimpleLink SDK ecosystem and proprietary sensor controller offload are prioritized over Zigbee/Thread convergence |
Compared with Nordic nRF52840 and TI CC2652R1, STM32WB55VEQ7 uniquely delivers native Zigbee 3.0 + Thread 1.3 + BLE 5.4 coexistence via hardware-isolated CPUs, integrated SMPS, and PSA-certified security - making it optimal for multi-standard, battery-operated, safety-critical IoT endpoints.
Availability
STM32WB55VEQ7 is available at Aetrix Electronics and suitable for smart building sensor nodes, industrial wireless gateways, medical wearables, and asset tracking tags requiring stable component supply, long-term lifecycle assurance, and full regulatory documentation support.
Supply support for STM32WB55VEQ7 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, specializing in microcontrollers, power management, sensors, and automotive ICs - with over 40 years of industrial-grade reliability heritage.
The STM32WB series is ST's purpose-built wireless MCU product line targeting secure, ultra-low-power, multi-protocol IoT endpoints - designed to eliminate external RF front-end components and simplify certification for global markets.
FAQ
What development tools and software support are available for STM32WB55VEQ7?
ST provides STM32CubeWB firmware package (including BLE/802.15.4 stacks), STM32CubeMX for configuration, and STM32CubeIDE for debugging. Hardware tools include the STM32WB5MM-DK discovery kit and ST-LINK/V2-1 debugger. All are production-ready and maintained under ST's 10-year longevity program.
Does STM32WB55VEQ7 require an external crystal for Bluetooth operation?
Yes - a 32 MHz crystal is mandatory for BLE and 802.15.4 radio timing accuracy and regulatory compliance. The device integrates trimming capacitors, eliminating external load caps. An optional 32 kHz LSE crystal is required for RTC precision beyond ±500 ppm.
How is secure boot and firmware authenticity enforced on this MCU?
Secure boot uses immutable ROM-based bootloader validating SHA-256 hash and ECDSA signature of flash sector headers. Secure Firmware Installation (SFI) extends this to OTA updates, enforcing cryptographic chain-of-trust from ST's root key through customer-signed images - preventing unauthorized or tampered firmware execution.
Can STM32WB55VEQ7 operate without the integrated SMPS?
Yes - the SMPS can be disabled to use linear regulators (LDOs) instead. In bypass mode, VDD supplies power directly to VDD_CORE and VDD_RF. This simplifies design for low-noise analog applications but increases active current by ~15% compared to SMPS-enabled operation.
STM32WB55VEQ7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STM32WB
- Package/Case:
- 129-UFBGA
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- 802.15.4, Bluetooth
- Protocol:
- Bluetooth v5.3, Thread, Zigbee®
- Modulation:
- GFSK
- Frequency:
- 2.405GHz ~ 2.48GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 6dBm
- Sensitivity:
- -100dBm
- Memory Size:
- 512kB Flash, 256kB SRAM
- Serial Interfaces:
- ADC, I2C, SPI, UART, USART, USB
- GPIO:
- 72
- Voltage - Supply:
- 1.71V ~ 3.6V
- Current - Receiving:
- 4.5mA ~ 7.9mA
- Current - Transmitting:
- 5.2mA ~ 12.7mA
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 129-UFBGA (7x7)
STM32WB55VEQ7 FAQ
1.How can I place an order for STM32WB55VEQ7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WB55VEQ7 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 STM32WB55VEQ7 reliable?
The price and inventory of STM32WB55VEQ7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WB55VEQ7 is usually 5 days.
3.What payment methods are accepted for STM32WB55VEQ7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WB55VEQ7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WB55VEQ7?
STM32WB55VEQ7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WB55VEQ7 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 STM32WB55VEQ7?
For technical support, including STM32WB55VEQ7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WB55VEQ7 requirements.
6.How does Aetrix verify that STM32WB55VEQ7 is sourced from the original manufacturer or authorized distributors?
All STM32WB55VEQ7 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 STM32WB55VEQ7 meets industry standards.
7.What is the process for return or replacement of STM32WB55VEQ7?
All STM32WB55VEQ7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32WB55VEQ7, 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 STM32WB55VEQ7 part is unused and in its original packaging.
Return procedure for STM32WB55VEQ7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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