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STMicroelectronics STM32WB55CEU6
- Part No.:
- STM32WB55CEU6
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32WB55CEU6.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:10,953
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Product details
Overview
STM32WB55CEU6 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 ultra-low-power operation down to 13 nA shutdown mode. It targets secure, battery-powered IoT edge nodes requiring concurrent application processing and certified RF stack execution.
For engineers reviewing the STM32WB55CEU6 datasheet, STM32WB55CEU6 pinout, STM32WB55CEU6 application, or STM32WB55CEU6 equivalent, key selection criteria include dual-CPU architecture for real-time radio coexistence, integrated SMPS and balun for BOM reduction, PCROP-protected flash for secure OTA updates, and RF regulatory compliance (FCC Part 15, ETSI EN 300 328).
Technical Context
The device implements a tightly coupled dual-CPU architecture: the Cortex-M4 executes application firmware while the Cortex-M0+ handles time-critical Bluetooth LE and 802.15.4 protocol stack layers, communicating via IPCC and hardware semaphores. Radio subsystem includes integrated 2.4 GHz transceiver with on-die balun, RSSI measurement, and support for advertising extensions and EATT.
Power management features an embedded SMPS with intelligent bypass mode, five-level BOR, and seven low-power modes - including Stop mode at 2.1 µA with RTC and 256 KB RAM retention - enabling multi-year battery life in sensor nodes and wearables.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Cores | Dual-core: Arm Cortex-M4 @ 64 MHz (FPU, ART Accelerator) + Cortex-M0+ @ 32 MHz for radio stack |
| Wireless Protocols | Bluetooth 5.4 (LE), IEEE 802.15.4-2011 PHY/MAC, Thread 1.3, Zigbee 3.0 - all supported concurrently |
| RF Performance | RX sensitivity: -96 dBm (BLE 1 Mbps), -100 dBm (802.15.4); TX output: programmable up to +6 dBm in 1 dB steps |
| Memory | 512 KB flash (sector protection/PCROP), 256 KB SRAM (64 KB with parity), 1 KB OTP, 20×32-bit backup registers |
| Power Modes | 13 nA shutdown, 600 nA standby + RTC + 32 KB RAM, 2.1 µA stop + RTC + 256 KB RAM, <53 µA/MHz active (RF+SMPS on) |
| Security | 3× AES-256 engines, PKA (RSA/ECC/DH), TRNG, 96-bit unique ID, SFI for secure firmware installation |
| Package | UFQFPN48 (7 × 7 mm, 0.4 mm pitch), 48-pin, RoHS-compliant ECOPACK2 |
Pinout & Package
STM32WB55CEU6 is housed in a 48-pin Ultra Thin Fine Pitch Quad Flat No-lead (UFQFPN48) package with 0.4 mm pitch and 7 × 7 mm body size, optimized for compact PCB layouts and automated assembly. Pin functions are validated per ST's DS11929 Rev 18 datasheet Section 4 (Pinouts and pin description) and Table 16 (STM32WB55xx pin definitions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply | 1.71–3.6 V input for digital core and analog peripherals; connects to SMPS output or external LDO |
| VSS | Ground reference | Digital ground plane connection; multiple pins required for low-noise RF/analog separation |
| PA0 | GPIO / LSE oscillator input | Configurable as low-speed external crystal input (32.768 kHz) for RTC timing accuracy |
| PA13/PA14 | SWD debug interface | Serial Wire Debug clock/data pins - essential for development and field firmware update |
| RF_IO | RF transceiver I/O | Differential RF port (requires external matching network or IPD like MLPF-WB55-02E3) |
| VBAT | Backup power supply | Enables RTC and 32 KB backup SRAM retention during main power loss (e.g., coin-cell support) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-CPU Real-Time Radio Isolation | Separate Cortex-M0+ handles BLE/802.15.4 MAC/PHY in hard real-time, freeing M4 for application logic without jitter or latency |
| Integrated RF Balun | Eliminates discrete balun components, reducing BOM count and PCB area while maintaining ETSI/FCC compliance |
| Secure Firmware Installation (SFI) | Hardware-enforced authentication of OTA updates prevents unauthorized stack modification or downgrade attacks |
| Adaptive Real-Time Accelerator (ART) | Enables zero-wait-state execution from flash at 64 MHz, removing need for external memory or cache tuning |
| Embedded SMPS with Bypass Mode | Switching regulator improves efficiency at medium loads; auto-bypass to LDO at light loads avoids switching noise in sensitive analog/RF sections |
Applications
| Smart Home Sensor Hub | Industrial Wireless Node |
|---|---|
Use Scenario: Battery-powered temperature/humidity/motion sensor aggregating data from multiple endpoints and transmitting via BLE mesh or Thread to gateway. IC Role / Device Role / Timing Role: Dual-core MCU acts as both sensor fusion processor (M4) and certified BLE/Thread network node (M0+), managing concurrent advertising, scanning, and connection handling. Use Value: 2.1 µA Stop mode + RTC enables >5-year battery life; PCROP-protected flash ensures secure over-the-air stack updates without exposing proprietary application code. | Use Scenario: Condition-monitoring node in factory automation, collecting vibration, current, and thermal data from motors and reporting wirelessly to PLC or cloud. IC Role / Device Role / Timing Role: Acts as deterministic real-time edge controller with hardware semaphores coordinating shared ADC/timer resources between M4 (data analysis) and M0+ (time-synchronized RF transmission). Use Value: -100 dBm 802.15.4 RX sensitivity and RSSI-based TX power control extend range in electrically noisy environments; 105°C-rated operation supports deployment near heat sources. |
| Wearable Health Monitor | Asset Tracking Tag |
Use Scenario: Compact wearable measuring heart rate, SpO₂, and motion using integrated ADC, comparators, and touch sensing, with BLE 5.4 long-range and privacy features. IC Role / Device Role / Timing Role: Single-chip solution integrating analog front-end, low-power sensing peripherals, and certified BLE stack - eliminating external radio IC and associated RF validation effort. Use Value: 13 nA shutdown mode minimizes leakage during sleep; integrated VREFBUF and 12-bit ADC (4.26 Msps) enable high-fidelity biopotential signal acquisition with minimal external components. | Use Scenario: GPS-denied indoor/outdoor asset tracker using BLE direction finding (AoA/AoD) and periodic 802.15.4 beaconing for hybrid localization. IC Role / Device Role / Timing Role: Concurrent BLE 5.4 direction-finding engine and 802.15.4 beacon transmitter, synchronized via hardware timers and IPCC to avoid RF interference. Use Value: Programmable +6 dBm TX power and EATT support enable reliable low-latency location updates; 72 fast I/Os allow direct connection to GNSS module, accelerometer, and e-Ink display. |
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-QIAA | Single-core ARM Cortex-M4F @ 64 MHz; no dedicated radio CPU - BLE/802.15.4 stack runs on same core with RTOS scheduling overhead | Lacks hardware-isolated radio processing; requires careful RTOS partitioning to meet BLE timing constraints under heavy application load | Select when cost sensitivity outweighs deterministic radio latency requirements and BLE-only use case suffices |
| TI CC2652R1F | Arm Cortex-M4F @ 48 MHz + dedicated Sensor Controller Engine (SCE); supports BLE 5.0 and IEEE 802.15.4 but not Thread 1.3 or Zigbee 3.0 out-of-box | Requires TI's SimpleLink SDK and additional certification effort for Thread/Zigbee; lower max TX power (+5 dBm vs. +6 dBm) | Select when leveraging TI's extensive RF design ecosystem and legacy CC26xx toolchain is prioritized over latest protocol support |
Compared with nRF52840-QIAA and CC2652R1F, STM32WB55CEU6 uniquely delivers hardware-isolated dual-CPU execution for concurrent BLE 5.4 and Thread 1.3 stacks, integrated SMPS+balun for BOM reduction, and PCROP-secured flash enabling certified OTA updates without exposing application firmware - critical for industrial and medical deployments.
Availability
STM32WB55CEU6 is available at Aetrix Electronics and suitable for smart home sensor hubs, industrial wireless nodes, wearable health monitors, and asset tracking tags requiring stable component supply across multi-year production cycles.
Supply support for STM32WB55CEU6 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, sensors, power management ICs, and automotive-grade components since 1987.
The STM32WB series is ST's purpose-built wireless MCU product line targeting secure, ultra-low-power IoT endpoints requiring concurrent application processing and certified multi-protocol RF stack execution - with emphasis on industrial, medical, and consumer certification readiness.
FAQ
What development tools are officially supported for STM32WB55CEU6?
ST provides full support via STM32CubeWB firmware package, STM32CubeMX configuration tool, and STM32CubeIDE. Hardware tools include the STM32WB5MM-DK discovery kit and ST-LINK/V2-1 debugger. Bluetooth and Thread stacks are delivered as pre-certified binaries with source access for customization under NDA.
Does STM32WB55CEU6 require external RF matching components?
Yes - although it integrates an on-die balun, STM32WB55CEU6 requires external matching network components (e.g., capacitors and inductors) or an ST-approved IPD companion chip (MLPF-WB55-02E3) to achieve FCC/ETSI compliance and optimal RF performance across temperature and voltage ranges.
How is secure boot implemented on STM32WB55CEU6?
Secure boot uses hardware-enforced readout protection (RDP) levels and Secure Firmware Installation (SFI), which validates cryptographic signatures of OTA updates using embedded public key infrastructure (PKA) and AES engines before writing to flash - preventing unauthorized firmware execution or rollback.
Can STM32WB55CEU6 operate without an external crystal?
Yes - it includes internal oscillators: 32 MHz HSI16 (±1%), 32 kHz LSI (±5%), and a 32 kHz LSI2 (±500 ppm). However, BLE and 802.15.4 certification require the 32 MHz HSE with integrated trimming capacitors for frequency accuracy; crystal-less operation is only permitted for non-certified prototypes or non-RF application modes.
STM32WB55CEU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STM32WB
- Package/Case:
- 48-UFQFN Exposed Pad
- 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:
- 30
- Voltage - Supply:
- 1.71V ~ 3.6V
- Current - Receiving:
- 3.8mA ~ 7mA
- Current - Transmitting:
- 8.1mA ~ 13.1mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-UFQFPN (7x7)
STM32WB55CEU6 FAQ
1.How can I place an order for STM32WB55CEU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WB55CEU6 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 STM32WB55CEU6 reliable?
The price and inventory of STM32WB55CEU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WB55CEU6 is usually 5 days.
3.What payment methods are accepted for STM32WB55CEU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WB55CEU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WB55CEU6?
STM32WB55CEU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WB55CEU6 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 STM32WB55CEU6?
For technical support, including STM32WB55CEU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WB55CEU6 requirements.
6.How does Aetrix verify that STM32WB55CEU6 is sourced from the original manufacturer or authorized distributors?
All STM32WB55CEU6 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 STM32WB55CEU6 meets industry standards.
7.What is the process for return or replacement of STM32WB55CEU6?
All STM32WB55CEU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32WB55CEU6, 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 STM32WB55CEU6 part is unused and in its original packaging.
Return procedure for STM32WB55CEU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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