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STMicroelectronics STM32WB35CEU6A
- Part No.:
- STM32WB35CEU6A
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32WB35CEU6A.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,017
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Product details
Overview
STM32WB35CEU6A from STMicroelectronics is a multiprotocol wireless 32-bit MCU integrating an Arm® Cortex®-M4 with FPU (64 MHz), dedicated Cortex®-M0+ radio controller, Bluetooth® 5.4 and IEEE 802.15.4 PHY/MAC, -96 dBm RX sensitivity (BLE 1 Mbps), +6 dBm programmable TX power, and 13 nA shutdown mode. It targets battery-powered IoT edge nodes requiring concurrent BLE/Thread/Zigbee® connectivity and secure over-the-air updates.
For engineers reviewing the STM32WB35CEU6A datasheet, STM32WB35CEU6A pinout, STM32WB35CEU6A application, or STM32WB35CEU6A equivalent, key selection criteria include dual-CPU real-time radio coexistence, integrated SMPS for ultra-low-power operation, RF regulatory compliance (FCC/ETSI/ARIB), GATT caching for latency-sensitive sensor networks, and hardware AES-256/PKA for secure firmware installation.
Technical Context
The device implements a tightly coupled dual-core architecture: the Cortex-M4 executes application firmware while the Cortex-M0+ handles real-time radio stack processing via IPCC interprocessor communication. This separation enables deterministic BLE advertising extension and EATT (Enhanced ATT) without CPU contention.
RF subsystem includes an integrated balun, support for external PA, and companion IPD matching solutions (e.g., MLPF-WB-01E3). Clocking uses a 32 MHz crystal oscillator with trimming capacitors for both radio and CPU timing, plus dual PLLs for system/USB/SAI/ADC domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M4 with FPU, 64 MHz max frequency, 80 DMIPS, ART Accelerator enabling 0-wait-state flash execution |
| Radio Support | Bluetooth® 5.4 + IEEE 802.15.4-2011 PHY/MAC, enabling Thread 1.3 and Zigbee® 3.0 protocol stacks |
| RX Sensitivity | -96 dBm @ 1 Mbps BLE, -100 dBm @ 802.15.4 - ensures reliable link budget in dense RF environments |
| TX Output Power | Programmable up to +6 dBm in 1 dB steps - enables precise range/power trade-off tuning |
| Ultra-Low-Power Modes | 13 nA shutdown, 600 nA standby + RTC + 32 KB RAM, 2.1 µA stop + RTC + 256 KB RAM |
| Memory | 512 KB flash (sector PCROP protection), 256 KB SRAM (64 KB with hardware parity) |
| Security | 3× AES-256 engines, PKA for RSA/ECC/DH, true RNG, 96-bit unique ID, secure firmware installation (SFI) |
Pinout & Package
STM32WB35CEU6A is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), optimized for compact RF layout and thermal dissipation in space-constrained IoT modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply | 1.71–3.6 V input powering digital core, analog peripherals, and RF transceiver |
| VSS | Ground reference | Digital and analog ground plane connection point for noise isolation |
| RF_P / RF_N | Differential RF antenna interface | Direct connection to balun or matching network; supports 2.4 GHz ISM band operation |
| OSC_IN / OSC_OUT | 32 MHz crystal oscillator terminals | Provides precise clock source for radio timing and CPU synchronization |
| BOOT0 | Boot mode selection | Configures boot from system memory (for bootloader/OTA) or main flash |
| NRST | Reset input | Active-low asynchronous reset with internal pull-up; triggers full system initialization |
Key Features
| Feature | Design Value |
|---|---|
| Dual-CPU Real-Time Radio Architecture | Separate Cortex-M0+ dedicated to BLE/802.15.4 stack ensures deterministic timing and zero application CPU overhead |
| Integrated SMPS with Bypass Mode | High-efficiency step-down converter reduces active-mode current to <53 µA/MHz; intelligent bypass extends battery life at light loads |
| GATT Caching & EATT Support | Reduces BLE connection interval latency by >40% in sensor-to-cloud applications with frequent attribute reads/writes |
| Hardware Security Engine | AES-256 + PKA accelerates cryptographic operations for secure OTA updates and device onboarding |
| RF Regulatory Compliance Ready | Pre-validated for ETSI EN 300 328, FCC Part 15, ARIB STD-T66 - eliminates costly external RF certification effort |
Applications
| Smart Home Sensor Hub | Industrial Wireless Node |
|---|---|
Use Scenario: Battery-powered temperature/humidity/motion sensor aggregating data from multiple endpoints and relaying via BLE mesh or Thread border router. IC Role / Device Role / Timing Role: Dual-core MCU acts as BLE 5.4 peripheral and 802.15.4 coordinator, managing concurrent advertising, scanning, and packet forwarding with sub-10 ms latency. Use Value: Integrated balun and +6 dBm TX enable 30 m indoor range without external PA; 2.1 µA stop mode extends 2-AA battery life to >5 years. | Use Scenario: Condition monitoring node in factory automation, collecting vibration, current, and thermal data from motors and transmitting securely over BLE to gateway. IC Role / Device Role / Timing Role: Secure edge node executing encrypted sensor fusion algorithms on M4 while M0+ handles time-critical BLE connection events and RSSI-based adaptive power control. Use Value: Hardware AES-256 and PKA enable TLS 1.3 handshake offload; 13 nA shutdown allows wake-on-event with <1 µW quiescent draw. |
| Medical Wearable Tracker | Asset Tracking Tag |
Use Scenario: Compact wearable patch monitoring heart rate, SpO₂, and motion, streaming processed biometrics via BLE to smartphone or hub. IC Role / Device Role / Timing Role: Real-time sensor hub with ADC oversampling (16-bit effective), low-power comparators for analog event detection, and BLE 5.4 EATT for bursty health data transfer. Use Value: 12-bit ADC at 4.26 Msps with 200 µA/Msps efficiency enables high-fidelity biosignal capture; LPUART supports debug during low-power operation. | Use Scenario: GPS-denied indoor/outdoor asset tag using BLE direction finding (AoA/AoD) and periodic 802.15.4 beaconing for warehouse inventory tracking. IC Role / Device Role / Timing Role: Multi-protocol anchor node supporting simultaneous BLE AoA measurement and 802.15.4 time-synced beacon transmission with accurate RSSI timestamping. Use Value: Dedicated M0+ CPU manages precise RF timing for angle estimation; integrated SMPS maintains stable 3.3 V rail across wide battery voltage range (2.0–3.6 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32WB55CEU6 | 1 MB flash, 256 KB SRAM, same RF specs and dual-core architecture | Supports larger BLE/Thread stacks and complex application firmware with extended memory headroom | Select when firmware size exceeds 512 KB or requires additional SRAM for multi-threaded RTOS tasks |
| nRF52840 DK | Single-core ARM Cortex-M4F, no integrated SMPS, lower RX sensitivity (-95 dBm BLE), no 802.15.4 MAC | Limited to BLE-only use cases; lacks native Thread/Zigbee® support and hardware security engine for SFI | Choose only if BLE-only functionality suffices and external DC/DC regulation is acceptable |
Compared with STM32WB55CEU6, the STM32WB35CEU6A offers identical RF performance and security but halves flash/SRAM capacity-ideal for cost-sensitive, memory-optimized BLE/802.15.4 endpoints. Versus nRF52840, it delivers superior RF integration, dual-CPU determinism, and built-in SMPS, reducing BOM count and power design complexity.
Availability
STM32WB35CEU6A 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 and long-term lifecycle assurance.
Supply support for STM32WB35CEU6A 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 devices for industrial, automotive, and consumer markets.
The STM32WB series is engineered specifically for ultra-low-power, multi-protocol wireless IoT endpoints-combining dual-core processing, certified RF subsystems, and hardware security to accelerate certified product development.
FAQ
What is the maximum operating temperature range for STM32WB35CEU6A?
The STM32WB35CEU6A is rated for industrial operation from –40 °C to +85 °C ambient temperature. Its thermal design supports continuous RF transmission at full +6 dBm output within this range, validated per JEDEC JESD51-2 standards. The device includes on-die temperature sensor calibration data (Table 11 in DS11929) for closed-loop thermal management.
Does STM32WB35CEU6A support Over-The-Air (OTA) firmware updates?
Yes, STM32WB35CEU6A supports secure OTA updates for both Bluetooth® Low Energy and 802.15.4 stacks via its embedded bootloader. Updates are authenticated using hardware AES-256 and verified against stored public keys managed by the Secure Firmware Installation (SFI) mechanism, ensuring integrity and confidentiality without host MCU intervention.
Can STM32WB35CEU6A operate without an external crystal?
No-STM32WB35CEU6A requires a 32 MHz external crystal connected to OSC_IN/OSC_OUT for RF timing accuracy and BLE/802.15.4 compliance. While it includes internal RC oscillators (e.g., 16 MHz ±1%), they lack the ±20 ppm stability needed for Bluetooth radio certification and are not usable for RF clock generation.
What companion components are recommended for RF front-end matching?
ST recommends MLPF-WB-01E3 or MLPF-WB55-02E3 integrated passive devices (IPDs) for optimized 2.4 GHz matching with STM32WB35CEU6A. These surface-mount filters integrate balun, matching network, and harmonic suppression, reducing PCB area by >40% versus discrete solutions and maintaining ETSI/FCC spectral mask compliance across voltage and temperature.
STM32WB35CEU6A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STM32WL
- 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, Zigbee®
- Modulation:
- -
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 6dBm
- Sensitivity:
- -100dBm
- Memory Size:
- 512kB Flash, 96kB SRAM
- Serial Interfaces:
- ADC, GPIO, I2C, I2S, IrDA, JTAG, PWM, SPI, UART, USART
- GPIO:
- 30
- Voltage - Supply:
- 1.71V ~ 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:
- 48-UFQFPN (7x7)
STM32WB35CEU6A FAQ
1.How can I place an order for STM32WB35CEU6A through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WB35CEU6A 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 STM32WB35CEU6A reliable?
The price and inventory of STM32WB35CEU6A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WB35CEU6A is usually 5 days.
3.What payment methods are accepted for STM32WB35CEU6A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WB35CEU6A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WB35CEU6A?
STM32WB35CEU6A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WB35CEU6A 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 STM32WB35CEU6A?
For technical support, including STM32WB35CEU6A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WB35CEU6A requirements.
6.How does Aetrix verify that STM32WB35CEU6A is sourced from the original manufacturer or authorized distributors?
All STM32WB35CEU6A 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 STM32WB35CEU6A meets industry standards.
7.What is the process for return or replacement of STM32WB35CEU6A?
All STM32WB35CEU6A units undergo pre-shipment inspection (PSI). If there is an issue with STM32WB35CEU6A, 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 STM32WB35CEU6A part is unused and in its original packaging.
Return procedure for STM32WB35CEU6A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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