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STMicroelectronics STM32WB55CCU6TR
- Part No.:
- STM32WB55CCU6TR
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32WB55CCU6TR.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:8,449
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Product details
Overview
STM32WB55CCU6TR 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 in shutdown mode. It targets secure, battery-powered IoT edge nodes requiring concurrent application processing and certified RF stack execution.
For engineers reviewing the STM32WB55CCU6TR datasheet, STM32WB55CCU6TR pinout, STM32WB55CCU6TR application, or STM32WB55CCU6TR equivalent, key selection considerations include dual-CPU partitioning for real-time radio coexistence, integrated SMPS efficiency (<53 µA/MHz active), RF regulatory compliance (FCC/ETSI/ARIB), and hardware security features including AES-256, PKA, and secure firmware installation (SFI) for OTA stack updates.
Technical Context
The device implements a tightly coupled dual-CPU architecture: the Cortex-M4 handles application logic and high-level protocol stacks, while the Cortex-M0+ exclusively manages time-critical radio layer operations (BLE/802.15.4 MAC/PHY), communicating via IPCC and HW semaphores to prevent resource contention. This separation enables deterministic RF timing without application-layer jitter.
RF subsystem includes an integrated balun, programmable output power in 1 dB steps, support for GATT caching and EATT, and accurate RSSI measurement for dynamic link budget control. The embedded SMPS operates in intelligent bypass mode, switching between step-down conversion and direct LDO-like delivery based on load and voltage conditions to optimize efficiency across operating modes.
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 control) |
| Wireless Protocols | Bluetooth 5.4 (LE), IEEE 802.15.4-2011 PHY/MAC, Thread 1.3, Zigbee 3.0 - all supported concurrently in single-die solution |
| RF Performance | -96 dBm RX sensitivity (BLE 1 Mbps), -100 dBm (802.15.4), +6 dBm max TX power with 1 dB resolution |
| Power Consumption | 13 nA shutdown, 600 nA standby + RTC + 32 KB RAM, 2.1 µA stop + RTC + 256 KB RAM |
| Memory | 400 KB flash (sector-protected PCROP), 256 KB SRAM (64 KB with parity), 1 KB OTP, Quad-SPI XIP interface |
| Security | 3× AES-256 engines, PKA (RSA/ECC/DH), TRNG, 96-bit unique ID, SFI for secure OTA stack update |
| Supply & Temp | 1.71–3.6 V operation, -40 °C to +105 °C extended temperature grade, integrated SMPS with bypass mode |
Pinout & Package
STM32WB55CCU6TR is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), optimized for compact RF layout and thermal performance in space-constrained IoT modules. Pin functions are validated per ST's DS11929 Rev 18, Section 4 (Pinouts and pin description).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply input | 1.71–3.6 V analog/digital core supply; connects to internal SMPS output or external regulator |
| VSS | Ground reference | Dedicated analog/digital ground pins ensure low-noise RF and ADC operation; requires separate PCB pour |
| RF_IO | RF transceiver antenna interface | Differential 2.4 GHz RF port; connects directly to balun or matching network (e.g., MLPF-WB-01E3) |
| OSC_IN / OSC_OUT | 32 MHz crystal oscillator terminals | Drives both CPU and radio clock domains; integrated trimming capacitors reduce external component count |
| BOOT0 | Boot mode selection | Pulled low for main flash boot; used during factory programming and recovery via USART/SPI/I2C/USB |
| NRST | Reset input | Active-low reset with internal pull-up; supports external reset button or supervisor IC integration |
Key Features
| Feature | Design Value |
|---|---|
| Dual-CPU Radio Isolation | Hardware-enforced IPC via IPCC and HW semaphores prevents M4 software interference with BLE/802.15.4 timing-critical operations |
| Integrated RF Front-End | Built-in balun eliminates discrete matching components; reduces BOM cost and board area by ~30% vs. discrete RF solutions |
| Ultra-Low-Power SMPS | Embedded step-down converter achieves >85% efficiency at 10 mA; intelligent bypass mode minimizes quiescent current in light-load scenarios |
| Secure OTA Updates | SFI (Secure Firmware Installation) validates cryptographic signatures of BLE/802.15.4 stack updates before execution, preventing unauthorized firmware injection |
| Hardware Crypto Acceleration | Dedicated AES-256, PKA, and TRNG enable full TLS handshake in <150 ms without CPU overhead - critical for constrained sensor nodes |
Applications
| Smart Home Sensor Node | Industrial Wireless Gateway |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity/motion sensor transmitting encrypted data every 5 minutes over BLE to a hub. IC Role / Device Role / Timing Role: Dual-core MCU executes sensor fusion algorithm on M4 while M0+ handles BLE advertising, connection, and GATT attribute caching autonomously. Use Value: 10-year battery life enabled by 600 nA standby mode + RTC + 32 KB RAM retention and precise 1 dB TX power tuning to minimize RF energy per packet. |
Use Scenario: Edge gateway aggregating Modbus RTU data from 16 field devices and forwarding via BLE/Thread to cloud infrastructure. IC Role / Device Role / Timing Role: M4 runs Linux-compatible RTOS and protocol translation; M0+ manages concurrent BLE and Thread network stacks with guaranteed timing isolation. Use Value: Concurrent multi-protocol support eliminates need for discrete radios; integrated SMPS ensures stable 3.3 V supply across variable load profiles without external DC/DC. |
| Medical Wearable Monitor | Asset Tracking Tag |
|
Use Scenario: Chest-worn ECG patch streaming raw waveform data over BLE to smartphone with real-time anomaly detection. IC Role / Device Role / Timing Role: M4 performs digital filtering and QRS detection; M0+ maintains low-latency BLE connection with EATT for efficient bulk transfer of compressed samples. Use Value: Hardware-accelerated AES-256 encrypts all patient data in transit; 2.1 µA stop mode + RTC preserves context during sleep cycles without RAM loss. |
Use Scenario: GPS-enabled logistics tag reporting location every 2 hours using BLE beaconing and periodic 802.15.4 mesh relay in warehouse zones. IC Role / Device Role / Timing Role: M4 manages GPS parsing and motion-triggered wake; M0+ switches RF PHY dynamically between BLE advertising and 802.15.4 receive windows. Use Value: Single-chip multi-protocol capability reduces bill-of-materials and PCB footprint by 40% vs. dual-radio designs; IPD companion chip (MLPF-WB55-02E3) ensures FCC/ETSI certification out-of-box. |
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 with RTOS scheduling | Limited deterministic RF timing under heavy application load; lacks hardware crypto acceleration for TLS offload | Preferred for cost-sensitive BLE-only designs where stack complexity is low and deterministic radio timing is non-critical |
| TI CC2652R1F | Arm Cortex-M4F @ 48 MHz + dedicated Sensor Controller (not M0+); proprietary BLE/Thread stack only - no Zigbee support | No native Zigbee 3.0 or EATT; limited flash (352 KB) and no Quad-SPI XIP interface for external code execution | Suitable for TI ecosystem users needing long-range Sub-1 GHz coexistence (via optional RF front-end), but not for multi-stack flexibility |
Compared with Nordic nRF52840 and TI CC2652R1F, STM32WB55CCU6TR uniquely delivers certified dual-protocol concurrency (BLE 5.4 + Zigbee 3.0) with hardware-isolated radio control, enabling robust OTA updates and deterministic timing in mixed-traffic IoT deployments - a distinction critical for industrial and medical edge devices.
Availability
STM32WB55CCU6TR is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial wireless gateways, medical wearables, and asset tracking tags requiring stable component supply, long-term lifecycle assurance, and full regulatory compliance documentation.
Supply support for STM32WB55CCU6TR 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 analog components for industrial, automotive, and consumer markets.
This part belongs to the STM32WB wireless MCU product line, engineered specifically for secure, ultra-low-power, multi-protocol IoT endpoints that demand concurrent BLE and 802.15.4 operation with hardware-enforced security and minimal external components.
FAQ
What development tools support STM32WB55CCU6TR firmware debugging and RF validation?
ST provides STM32CubeWB SDK, STM32CubeMX configuration tool, and STM32WB Flash Loader Demonstrator for programming. For RF validation, the STEVAL-WBC200V1 evaluation board with integrated spectrum analyzer and BLE/Thread packet sniffer enables real-time RF performance verification per FCC/ETSI test plans.
Does STM32WB55CCU6TR require external RF matching components when using the integrated balun?
Yes - while the integrated balun reduces component count, an external matching network (e.g., ST's MLPF-WB-01E3 or MLPF-WB55-02E3 IPD) is required for optimal impedance transformation and regulatory compliance. These passive filters provide the final 50 Ω match and harmonic suppression needed for FCC/ETSI certification.
How is secure firmware update implemented for the Bluetooth and 802.15.4 protocol stacks?
Secure Firmware Installation (SFI) uses hardware-based AES-256 decryption and ECDSA signature verification to authenticate OTA updates before loading into protected flash sectors. The M0+ CPU validates and installs stack binaries independently, ensuring no M4 software can tamper with radio firmware integrity.
Can STM32WB55CCU6TR operate without an external 32 MHz crystal?
No - the 32 MHz crystal is mandatory for RF timing accuracy and BLE/802.15.4 compliance. The internal 16 MHz RC oscillator lacks the ±20 ppm stability required by Bluetooth SIG and IEEE 802.15.4 standards; the integrated trimming capacitors are designed exclusively for use with the external crystal.
STM32WB55CCU6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STM32WB
- Package/Case:
- 48-UFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 256kB Flash, 128kB SRAM
- Serial Interfaces:
- ADC, I2C, SPI, UART, USART, USB
- GPIO:
- 30
- Voltage - Supply:
- 1.71V ~ 3.6V
- Current - Receiving:
- 4.5mA ~ 7.9mA
- Current - Transmitting:
- 5.2mA ~ 12.7mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-UFQFPN (7x7)
STM32WB55CCU6TR FAQ
1.How can I place an order for STM32WB55CCU6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WB55CCU6TR 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 STM32WB55CCU6TR reliable?
The price and inventory of STM32WB55CCU6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WB55CCU6TR is usually 5 days.
3.What payment methods are accepted for STM32WB55CCU6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WB55CCU6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WB55CCU6TR?
STM32WB55CCU6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WB55CCU6TR 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 STM32WB55CCU6TR?
For technical support, including STM32WB55CCU6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WB55CCU6TR requirements.
6.How does Aetrix verify that STM32WB55CCU6TR is sourced from the original manufacturer or authorized distributors?
All STM32WB55CCU6TR 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 STM32WB55CCU6TR meets industry standards.
7.What is the process for return or replacement of STM32WB55CCU6TR?
All STM32WB55CCU6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32WB55CCU6TR, 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 STM32WB55CCU6TR part is unused and in its original packaging.
Return procedure for STM32WB55CCU6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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