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STMicroelectronics STM32WB35CCU6ATR
- Part No.:
- STM32WB35CCU6ATR
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32WB35CCU6ATR.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,596
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Product details
Overview
STM32WB35CCU6ATR from STMicroelectronics is a multiprotocol wireless 32-bit MCU integrating Arm® Cortex®-M4 with FPU (64 MHz), Bluetooth® 5.4 and IEEE 802.15.4 radio, 256 KB SRAM, 512 KB flash, and ultra-low-power operation down to 13 nA shutdown mode. It features dual-core architecture (M4 + dedicated M0+ for radio), integrated balun, and supports Thread 1.3/Zigbee® 3.0 in compact UFQFPN48 package - deployed in battery-powered IoT sensor nodes requiring certified RF compliance and OTA firmware updates.
For engineers reviewing the STM32WB35CCU6ATR datasheet, STM32WB35CCU6ATR pinout, STM32WB35CCU6ATR application, or STM32WB35CCU6ATR equivalent, key selection criteria include Bluetooth 5.4 + 802.15.4 coexistence, -96 dBm BLE RX sensitivity, +6 dBm programmable TX power, dual-CPU interprocessor communication (IPCC), and SMPS efficiency in sub-1 µA standby with RTC retention.
Technical Context
The device implements a tightly coupled dual-CPU architecture: Cortex-M4 handles application logic and real-time processing, while a dedicated Cortex-M0+ executes time-critical radio stack layers (BLE/802.15.4 PHY/MAC) via IPCC messaging. The RF subsystem integrates a 2.4 GHz transceiver with on-die balun, supporting 1/2 Mbps data rates and EATT, advertising extensions, and GATT caching.
Power management includes an embedded SMPS with intelligent bypass mode, five BOR thresholds, and seven low-power modes - Stop mode draws 2.1 µA with RTC + 256 KB RAM retained, while Standby consumes 600 nA with RTC + 32 KB RAM. Clocking combines 32 MHz crystal (radio/CPU), 32 kHz LSE (RTC), and auto-trimmed MSI (±0.25% accuracy).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M4 with FPU, 64 MHz max, 80 DMIPS, ART Accelerator for zero-wait-state flash execution |
| Wireless Protocols | Bluetooth® 5.4 + IEEE 802.15.4-2011 PHY/MAC, enabling Thread 1.3 and Zigbee® 3.0 stack deployment |
| RX Sensitivity | -96 dBm @ 1 Mbps BLE, -100 dBm @ 802.15.4 - enables robust link budget in mesh networks |
| TX Output Power | Programmable up to +6 dBm in 1 dB steps - balances range vs. battery life without external PA |
| Memory | 512 KB flash (sector-protected PCROP), 256 KB SRAM (64 KB with hardware parity) |
| Low-Power Modes | 13 nA shutdown, 600 nA standby + RTC + 32 KB RAM, 2.1 µA stop + RTC + 256 KB RAM |
| Supply Voltage | 1.71–3.6 V - compatible with single-cell Li-ion, Li-SOCl₂, and alkaline battery systems |
Pinout & Package
UFQFPN48 (7 × 7 mm, 0.4 mm pitch) with exposed thermal pad. Pinout validated per STMicroelectronics DS11929 Rev 18 Table 17 (STM32WB35xx pin definitions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply input | 1.71–3.6 V core/analog supply; connects to SMPS output or LDO |
| VSS | Ground reference | Digital/analog ground plane connection; multiple pins for noise isolation |
| PA0 | General-purpose I/O / LSEOUT | Configurable as wake-up source, RTC clock output, or analog input |
| PA13 | SWDIO debug interface | Serial Wire Debug data I/O - essential for development and field firmware update |
| PA14 | SWCLK debug interface | Serial Wire Debug clock input - enables non-intrusive real-time debugging |
| RF_IO | RF transceiver antenna port | Differential RF I/O with integrated balun; requires matching network per MLPF-WB-01E3 |
| VBAT | Backup power supply | Supplies RTC and 32 backup registers during main power loss - accepts 1.65–3.6 V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-CPU Radio Architecture | Separate Cortex-M0+ offloads BLE/802.15.4 stack, freeing M4 for application logic and deterministic latency |
| Integrated Balun | Eliminates external RF matching components, reducing BOM count and PCB area by ~30% vs discrete solutions |
| SMPS with Intelligent Bypass | Switches to LDO mode at light load, maintaining >85% efficiency across 10 µA–100 mA current range |
| Hardware Crypto Acceleration | Three AES engines (128/192/256-bit), PKA, RNG, and CRC unit - enables secure OTA updates and device identity provisioning |
| OTA Update Support | Native bootloader for Bluetooth LE and 802.15.4 over-the-air firmware upgrades without external host controller |
Applications
| Smart Utility Metering | Industrial Wireless Sensor Node |
|---|---|
Use Scenario: Battery-powered gas/water meter transmitting hourly consumption via Thread mesh network to gateway. IC Role / Device Role / Timing Role: Primary system-on-chip handling sensor acquisition, BLE commissioning, 802.15.4 MAC layer, and secure OTA updates. Use Value: -100 dBm 802.15.4 RX sensitivity ensures reliable multi-hop routing in metal-enclosed meter cabinets; 13 nA shutdown extends 10-year battery life. | Use Scenario: Predictive maintenance node monitoring vibration/temperature on rotating machinery in factory environment. IC Role / Device Role / Timing Role: Dual-role processor: M4 runs FFT-based analytics and Modbus RTU over LPUART; M0+ manages BLE beaconing and 802.15.4 sensor fusion packets. Use Value: 2.1 µA Stop mode with full 256 KB RAM retention allows instant wake-on-event without RAM reload; IP67-rated enclosure compatibility via 5 V-tolerant I/Os. |
| Medical Wearable Patch | Asset Tracking Beacon |
Use Scenario: Disposable ECG patch streaming raw biosignals to smartphone via BLE 5.4 long-range mode. IC Role / Device Role / Timing Role: Real-time signal acquisition (12-bit ADC @ 4.26 Msps), BLE 5.4 EATT for efficient attribute transfers, and secure firmware signing. Use Value: 4.5 mA RX current at 3.3 V enables >2-week runtime on CR2032; integrated 2.048 V VREFBUF ensures ±0.5% ADC accuracy across temperature. | Use Scenario: GPS-denied indoor logistics tag reporting location via BLE proximity + 802.15.4 mesh backhaul to warehouse gateway. IC Role / Device Role / Timing Role: Concurrent BLE advertiser (for smartphone scanning) and 802.15.4 end-device (for mesh routing), managed via IPCC synchronization. Use Value: +6 dBm TX power with 1 dB resolution optimizes RSSI-based trilateration accuracy; 600 nA standby with RTC enables precise 15-second beacon intervals over 5-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiprotocol wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32WB55CEU6 | 1 MB flash, 256 KB SRAM, same RF specs, VFQFPN68 package (8 × 8 mm) | Higher memory headroom for complex BLE mesh stacks or concurrent Thread/Zigbee applications | Select when >512 KB flash required for dual-stack firmware or future feature expansion |
| nRF52840-QIAA | Single Cortex-M4, no integrated 802.15.4 MAC, 1 MB flash, -95 dBm BLE RX, no SMPS | Limited to BLE-only or requires external 802.15.4 stack; higher active current (5.5 mA RX) | Choose only if BLE-centric design avoids Thread/Zigbee and accepts external DC/DC or LDO dependency |
Compared with STM32WB55CEU6, the STM32WB35CCU6ATR trades flash capacity for smaller footprint and lower cost in volume production; versus nRF52840-QIAA, it delivers native dual-protocol support with superior RF sensitivity and integrated power management - critical for battery-constrained, regulatory-certified deployments.
Availability
STM32WB35CCU6ATR is available at Aetrix Electronics and suitable for smart utility metering, industrial wireless sensor nodes, medical wearable patches, and asset tracking beacons requiring stable component supply across multi-year production cycles.
Supply support for STM32WB35CCU6ATR 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 automotive chips since 1987.
The STM32WB series targets ultra-low-power, multiprotocol wireless applications - specifically engineered to unify BLE 5.4 and IEEE 802.15.4 in a single chip for Thread/Zigbee-certifiable IoT endpoints with minimal external components.
FAQ
What is the maximum operating temperature for STM32WB35CCU6ATR?
The STM32WB35CCU6ATR is rated for industrial temperature range: -40 °C to +105 °C ambient. This specification is validated per DS11929 Rev 18 Section 6.3.2 and applies to all operating modes including active RF transmission at +6 dBm. Thermal derating begins above 105 °C ambient, requiring board-level thermal design per ST's AN5028 guidelines.
Does STM32WB35CCU6ATR support USB connectivity?
No, the STM32WB35CCU6ATR does not integrate a USB peripheral. Unlike the STM32WB55xx family, the WB35xx variant omits the USB 2.0 FS device interface. Communication is supported via USART, LPUART, SPI, I²C, and SWD debug - USB functionality must be implemented externally if required.
How is the RF performance certified for regulatory compliance?
The STM32WB35CCU6ATR meets ETSI EN 300 328, EN 300 440, FCC CFR47 Part 15, and ARIB STD-T66 requirements when used with ST-recommended matching networks (e.g., MLPF-WB-01E3) and layout guidelines in AN5289. Certification test reports are available under NDA from STMicroelectronics for qualified customers.
Can the internal SMPS be disabled in favor of external power regulation?
Yes, the embedded SMPS can be bypassed using the VDD_SMPS pin configuration. When VDD_SMPS is tied to VDD, the device operates in LDO mode with 3.3 V input. This is documented in Section 3.7.2 of DS11929 Rev 18 and enables use with external high-efficiency DC/DC converters or legacy power architectures.
STM32WB35CCU6ATR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STM32WB
- Package/Case:
- 48-UFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- TxRx + MCU
- RF Family/Standard:
- 802.15.4, Bluetooth
- Protocol:
- Bluetooth v5.3, Thread, Zigbee®
- Modulation:
- GFSK
- Frequency:
- 2.4GHz ~ 2.48GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 6dBm
- Sensitivity:
- -100dBm
- Memory Size:
- 1MB Flash, 256kB SRAM
- Serial Interfaces:
- ADC, GPIO, I2C, I2S, IrDA, JTAG, PWM, SPI, UART, USART, USB
- GPIO:
- 30
- Voltage - Supply:
- 1.62V ~ 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)
STM32WB35CCU6ATR FAQ
1.How can I place an order for STM32WB35CCU6ATR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WB35CCU6ATR 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 STM32WB35CCU6ATR reliable?
The price and inventory of STM32WB35CCU6ATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WB35CCU6ATR is usually 5 days.
3.What payment methods are accepted for STM32WB35CCU6ATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WB35CCU6ATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WB35CCU6ATR?
STM32WB35CCU6ATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WB35CCU6ATR 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 STM32WB35CCU6ATR?
For technical support, including STM32WB35CCU6ATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WB35CCU6ATR requirements.
6.How does Aetrix verify that STM32WB35CCU6ATR is sourced from the original manufacturer or authorized distributors?
All STM32WB35CCU6ATR 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 STM32WB35CCU6ATR meets industry standards.
7.What is the process for return or replacement of STM32WB35CCU6ATR?
All STM32WB35CCU6ATR units undergo pre-shipment inspection (PSI). If there is an issue with STM32WB35CCU6ATR, 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 STM32WB35CCU6ATR part is unused and in its original packaging.
Return procedure for STM32WB35CCU6ATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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