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STMicroelectronics STM32WB55CEU7
- Part No.:
- STM32WB55CEU7
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32WB55CEU7.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:910
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Product details
Overview
STM32WB55CEU7 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 STM32WB55CEU7 datasheet, STM32WB55CEU7 pinout, STM32WB55CEU7 application, or STM32WB55CEU7 equivalent, key selection criteria include dual-CPU isolation for real-time radio coexistence, integrated SMPS with bypass mode, hardware AES-256 and PKA acceleration, OTA update support via BLE/802.15.4, and RF regulatory compliance (FCC Part 15, ETSI EN 300 328).
Technical Context
The device implements a tightly coupled dual-CPU architecture: the M4 executes application firmware while the M0+ exclusively handles time-critical Bluetooth Low Energy and 802.15.4 link-layer operations via IPCC interprocessor messaging and hardware semaphores. Radio subsystem includes integrated balun, RSSI measurement, advertising extensions, and EATT support.
Power management integrates an embedded SMPS step-down converter with intelligent bypass mode, five-level BOR, and seven low-power modes - including Stop mode at 2.1 µA with 256 KB RAM retention and Standby at 600 nA with RTC + 32 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+ @ 32 MHz (dedicated radio layer) |
| Wireless Protocols | Bluetooth 5.4 (LE), IEEE 802.15.4-2011 PHY/MAC (Thread 1.3, Zigbee 3.0), GATT caching, EATT, advertising extensions |
| 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 PCROP protection), 256 KB SRAM (64 KB with parity), 1 KB OTP, Quad-SPI XIP interface |
| Power Consumption | 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, HW PKA (RSA/ECC/DH), TRNG, 96-bit unique ID, SFI for secure radio stack installation |
| Analog Peripherals | 12-bit ADC @ 4.26 Msps (16-bit oversampling), 2× ultra-low-power comparators, buffered 2.048 V/2.5 V reference |
| I/O & Interfaces | 72 fast I/Os (70× 5 V-tolerant), USB 2.0 FS (crystal-less), 2× SPI (32 Mbit/s), 2× I²C (SMBus/PMBus), SAI, LPUART, touch sensing (18 channels) |
Pinout & Package
STM32WB55CEU7 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.4 mm pitch) with exposed thermal pad. 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 core/analog supply; powers M4, M0+, RF, and most peripherals |
| VSS | Ground reference | Digital and analog ground return; requires low-impedance PCB layout |
| PA13 / SWDIO | Debug interface | Serial Wire Debug data I/O; supports programming and real-time trace |
| PA14 / SWCLK | Debug interface | Serial Wire Debug clock input; synchronous timing for SWD communication |
| NRST | Reset input | Active-low external reset; triggers system-wide initialization and boot sequence |
| RF_IO | RF transceiver I/O | Differential RF port (requires external matching network or IPD like MLPF-WB-01E3) |
| VBAT | Backup power | Supplies RTC and backup registers during main power loss; accepts 1.65–3.6 V |
| PC14 / OSC32_IN | RTC crystal input | Connects to 32.768 kHz crystal for precise real-time clock operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual-CPU Isolation | M4 and M0+ operate independently with hardware semaphores and IPCC messaging - prevents RF stack interference with application tasks |
| Integrated RF Front-End | Built-in balun reduces external component count; supports 2 Mbps BLE, EATT, and advertising extensions for scalable mesh topologies |
| Ultra-Low-Power SMPS | Embedded step-down converter with intelligent bypass mode - optimizes efficiency across load range and extends battery life in intermittent wake-up systems |
| Hardware Security Engine | Dedicated AES-256, PKA, and TRNG enable secure boot, encrypted OTA updates, and cryptographic key derivation without CPU overhead |
| OTA Update Support | Native over-the-air firmware update capability for both BLE and 802.15.4 stacks - eliminates need for physical reprogramming in deployed devices |
| Regulatory Compliance Ready | Pre-validated RF performance meets FCC Part 15, ETSI EN 300 328, and ARIB STD-T66 - accelerates end-product certification |
Applications
| Smart Home Sensor Hub | Industrial Wireless Node |
|---|---|
Use Scenario: Battery-powered temperature/humidity/motion sensor aggregating data from multiple sensors and transmitting securely to gateway via BLE mesh or Thread. IC Role / Device Role / Timing Role: Dual-core MCU executing sensor fusion algorithm on M4 while M0+ manages concurrent BLE advertising, connection, and Thread routing without timing jitter. Use Value: 2.1 µA Stop mode with full RAM retention enables >5-year coin-cell operation; integrated SMPS ensures stable voltage across battery discharge curve. | Use Scenario: Wireless condition monitoring node in factory environment measuring vibration, current, and ambient temperature with local edge analytics. IC Role / Device Role / Timing Role: Real-time M0+ radio controller maintains deterministic 802.15.4 beacon intervals and MAC timing while M4 runs FFT-based vibration analysis and anomaly detection. Use Value: Hardware AES-256 encrypts sensor telemetry before transmission; 70× 5 V-tolerant I/Os interface directly with industrial-level analog front-ends and digital sensors. |
| Medical Wearable Tracker | Asset Tracking Tag |
Use Scenario: Ultra-low-power wearable patch monitoring heart rate, SpO₂, and motion, transmitting encrypted health data via BLE to smartphone or hub. IC Role / Device Role / Timing Role: M4 processes PPG signal filtering and HR calculation; M0+ handles BLE connection supervision, ATT caching, and EATT for efficient bulk data transfer. Use Value: 13 nA shutdown mode minimizes leakage during sleep; integrated balun and RF calibration reduce RF design complexity and test cost. | Use Scenario: GPS-denied indoor/outdoor asset tag using BLE proximity and 802.15.4 geofencing with periodic location reporting via LPWAN gateway. IC Role / Device Role / Timing Role: Dual-protocol support allows BLE for short-range commissioning and 802.15.4 for long-range, low-latency location beaconing with synchronized channel hopping. Use Value: -100 dBm 802.15.4 RX sensitivity enables reliable reception through walls and metal enclosures; 64 MHz M4 supports lightweight localization algorithms. |
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 on same core with RTOS scheduling | Limited deterministic real-time radio behavior under heavy application load; no native Thread/Zigbee 3.0 stack support | Preferred for cost-sensitive BLE-only designs where dual-CPU isolation is unnecessary |
| TI CC2652R | Arm Cortex-M4F @ 48 MHz + dedicated radio processor (not M0+); proprietary BLE stack only - no IEEE 802.15.4 MAC/PHY | No Thread or Zigbee 3.0 certification path; lower RF output (+5 dBm max) and weaker RX sensitivity (-96 dBm BLE) | Suitable for BLE-centric industrial sensor nodes requiring TI's SimpleLink SDK and long-term toolchain stability |
Compared with nRF52840 and CC2652R, STM32WB55CEU7 uniquely delivers hardware-isolated dual-CPU execution for concurrent BLE and 802.15.4 protocol stacks, integrated SMPS for wide-input battery operation, and ST's certified Thread 1.3/Zigbee 3.0 software stack - making it optimal for multi-protocol, regulatory-certifiable, and ultra-low-power IoT endpoints.
Availability
STM32WB55CEU7 is available at Aetrix Electronics and suitable for smart home sensor hubs, industrial wireless nodes, medical wearables, and asset tracking tags requiring stable component supply, long-lifecycle support, and certified RF performance.
Supply support for STM32WB55CEU7 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The STM32WB series is ST's ultra-low-power wireless MCU product line, engineered specifically for secure, battery-operated IoT endpoints requiring concurrent multi-protocol wireless connectivity and real-time application processing.
FAQ
What development tools and software support are available for STM32WB55CEU7?
ST provides the STM32CubeWB firmware package with certified BLE 5.4 and Thread 1.3/Zigbee 3.0 protocol stacks, STM32CubeMX for graphical configuration, and STM32CubeIDE for development. Hardware tools include the STM32WB5MM-DK discovery kit and ST-LINK/V2-1 debugger. All are fully supported and maintained by ST's official ecosystem.
Does STM32WB55CEU7 require external RF matching components?
Yes - the RF_IO pin is a differential 50 Ω interface requiring external matching. ST recommends companion IPD chips (e.g., MLPF-WB-01E3 or MLPF-WB55-02E3) for optimized 2.4 GHz band matching. Alternatively, discrete LC networks can be used per the reference schematics in AN5289 and the datasheet's Section 3.6.5.
How is security implemented for over-the-air firmware updates?
Firmware updates are secured via Secure Firmware Installation (SFI), which validates digital signatures using hardware-accelerated ECDSA before flashing. The bootloader supports signed images over BLE or 802.15.4, with AES-256 encryption of payload and PKA-based key exchange - all enforced in ROM-resident secure boot code.
What is the maximum operating temperature range for STM32WB55CEU7 in industrial applications?
The STM32WB55CEU7 is rated for industrial temperature operation from –40 °C to +105 °C (ambient), validated per datasheet Section 6.3.2. This rating applies to the UFQFPN48 package (CEU7 suffix) and supports deployment in harsh environments such as factory automation controllers and outdoor sensor enclosures.
STM32WB55CEU7 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:
- 4.5mA ~ 7.9mA
- Current - Transmitting:
- 5.2mA ~ 12.7mA
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-UFQFPN (7x7)
STM32WB55CEU7 FAQ
1.How can I place an order for STM32WB55CEU7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WB55CEU7 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 STM32WB55CEU7 reliable?
The price and inventory of STM32WB55CEU7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WB55CEU7 is usually 5 days.
3.What payment methods are accepted for STM32WB55CEU7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WB55CEU7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WB55CEU7?
STM32WB55CEU7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WB55CEU7 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 STM32WB55CEU7?
For technical support, including STM32WB55CEU7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WB55CEU7 requirements.
6.How does Aetrix verify that STM32WB55CEU7 is sourced from the original manufacturer or authorized distributors?
All STM32WB55CEU7 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 STM32WB55CEU7 meets industry standards.
7.What is the process for return or replacement of STM32WB55CEU7?
All STM32WB55CEU7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32WB55CEU7, 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 STM32WB55CEU7 part is unused and in its original packaging.
Return procedure for STM32WB55CEU7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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