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STMicroelectronics STM32WBA55CEU6
- Part No.:
- STM32WBA55CEU6
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- -
- Datasheet:
-
STM32WBA55CEU6.pdf
- Description:
- UFQFPN 7X7X0.55 48L 0.5 MM PITCH
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Product details
Overview
STM32WBA55CEU6 from STMicroelectronics is a multiprotocol wireless 32-bit MCU based on Arm® Cortex®-M33 with TrustZone®, FPU, and integrated 2.4 GHz radio supporting Bluetooth® LE 6.0 and IEEE 802.15.4 (Thread/Matter/Zigbee®). It delivers -96 dBm RX sensitivity at 1 Mbps BLE, +10 dBm programmable TX power, 1 Mbyte flash with ECC, 128-Kbyte SRAM, and operates from 1.71–3.6 V across -40 to 105°C. Used in secure, ultra-low-power IoT edge nodes requiring concurrent protocol stack execution and hardware-accelerated cryptography.
For engineers reviewing the STM32WBA55CEU6 datasheet, STM32WBA55CEU6 pinout, STM32WBA55CEU6 application, or STM32WBA55CEU6 equivalent, key selection criteria include its dual-protocol RF capability, TrustZone-enabled secure boot and firmware upgrade, sub-µA standby current (160 nA), integrated balun, and support for Auracast™, direction finding, and long-range BLE modes.
Technical Context
This MCU integrates a dual-mode 2.4 GHz transceiver with independent PHY/MAC layers for Bluetooth LE and IEEE 802.15.4, enabling concurrent or time-sliced protocol operation. Its FlexPowerControl architecture enables autonomous peripheral operation down to Stop 1 mode, with DMA-supported low-power timers, ADC oversampling, and LPTIMs active in Stop.
The security subsystem implements Arm TrustZone® at silicon level, with securable I/Os, memories, and peripherals; Root of Trust via unique boot entry and HDP; SFI via embedded RSS; and hardware accelerators for AES (DPA-resistant), PKA, HASH, and NIST SP800-90B-compliant TRNG - all accessible only from secure world without privilege escalation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 @ up to 100 MHz with TrustZone®, FPU, MPU, and DSP extensions - enables real-time deterministic processing of dual-stack wireless protocols and sensor fusion. |
| RF Performance | -96 dBm BLE RX sensitivity (1 Mbps), -97.5 dBm IEEE 802.15.4 RX (250 kbps), +10 dBm TX output with 1 dB steps - meets ETSI/FCC/ARIB regulatory limits without external PA in most compact designs. |
| Memory | 1 Mbyte flash (ECC, 100k write cycles), 128-Kbyte SRAM (64 KB with parity), 512-byte OTP - supports secure over-the-air updates and robust data logging in resource-constrained edge devices. |
| Power Efficiency | 160 nA Standby (16 wake-up pins), 6.5 µA Stop (64-Kbyte SRAM retained), 23 µA/MHz Run - extends battery life to years in coin-cell-powered sensors and beacons. |
| Security Acceleration | Dual AES co-processors (one DPA-resistant), PKA, HASH, TRNG, 96-bit UID, active tampers - enables certified secure boot, key provisioning, and Matter-compliant device attestation. |
| Peripherals | 3x UART, 2x SPI, 2x I²C Fm+, 1x SAI, 12-bit ADC @ 2.5 Msps (16-bit w/ oversampling), touch controller (20 sensors), 8-channel GPDMA - supports rich sensor aggregation, audio streaming, and human interface in single-chip solutions. |
Pinout & Package
STM32WBA55CEU6 uses the UFQFPN32 (5 × 5 mm) package with 32-pin layout optimized for RF performance and minimal PCB footprint. Pin assignment includes dedicated RFIO, VDDRF, VSSRF, and crystal connections isolated from digital supply domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFIO | RF transceiver antenna interface | Single-ended 50 Ω RF port; requires matching network or direct connection to balun-integrated antenna trace per AN5925. |
| VDDRF / VSSRF | Dedicated RF power/ground | Isolated analog supply domain minimizes digital noise coupling into sensitive RX path; mandatory separate decoupling per datasheet Section 5.3.3. |
| OSC_IN / OSC_OUT | 32 MHz crystal oscillator terminals | Supports single-crystal configuration for system clock; internal load caps eliminate need for external capacitors in standard layouts. |
| BOOT0 | Boot mode selection | Pulled low by default; high during reset forces system memory boot - essential for factory programming and recovery sequences. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with open-drain supervisors and manual reset buttons per Section 5.3.18. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Balun | Eliminates external RF matching components, reducing BOM cost and PCB area while maintaining >90% RF efficiency across BLE/802.15.4 bands. |
| TrustZone Hardware Isolation | Enforces strict separation between secure firmware (e.g., Matter SDK, bootloader) and non-secure application code - prevents privilege escalation attacks in field-deployed devices. |
| FlexPowerControl Architecture | Enables peripherals like LPTIM, ADC, and comparators to operate autonomously in Stop mode without CPU wake-up - critical for duty-cycled environmental sensing. |
| Multi-Protocol Radio Engine | Hardware-accelerated concurrent BLE 6.0 and IEEE 802.15.4 MAC layer execution - allows seamless interoperability between Matter-over-Thread and legacy BLE accessories in smart home hubs. |
| SAI Audio Interface | Supports I²S, PCM, and AC'97 protocols with FIFO buffering - enables local voice preprocessing or Auracast™ receiver implementation without external audio codec. |
Applications
| Smart Home Sensor Hub | BLE Audio Beacon |
|---|---|
Use Scenario: Compact wall-mounted hub aggregating temperature, humidity, occupancy, and contact sensors while bridging Thread and BLE networks. IC Role / Device Role / Timing Role: Primary wireless SoC executing Matter controller stack, BLE proxy, and sensor fusion algorithms with hardware-accelerated crypto for device commissioning. Use Value: Single-chip integration eliminates external radio IC and secure element, reducing bill-of-materials by 30% and enabling sub-20 mm² PCB area. | Use Scenario: Battery-powered retail beacon broadcasting personalized promotions and supporting Auracast™ audio streaming to hearing aids. IC Role / Device Role / Timing Role: Dual-role BLE transmitter and isochronous channel receiver with precise timing synchronization for low-latency audio packet delivery. Use Value: 160 nA standby current enables 5+ year coin-cell operation; integrated balun ensures FCC-certified radiated emissions without RF tuning. |
| Industrial Predictive Maintenance Node | Secure Medical Wearable |
Use Scenario: Vibration and temperature monitoring node deployed on rotating machinery, transmitting encrypted telemetry via BLE to gateway. IC Role / Device Role / Timing Role: Real-time edge processor running FFT-based anomaly detection, with TrustZone-protected key storage and secure OTA update handling. Use Value: Hardware PKA accelerator reduces RSA-2048 signature verification time to <12 ms, enabling rapid firmware validation before execution. | Use Scenario: FDA-class II wearable measuring SpO₂ and heart rate, requiring HIPAA-compliant data encryption and tamper-evident firmware integrity checks. IC Role / Device Role / Timing Role: Secure medical data concentrator with active tamper detection, TRNG-backed session keys, and hardware-enforced debug lockdown post-certification. Use Value: NIST SP800-90B-compliant TRNG and RHUK-secured key derivation meet IEC 62304 and ISO 13485 cryptographic assurance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiprotocol wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Nordic nRF52840 | ARM Cortex-M4F core, no TrustZone, 1 MB flash, BLE 5.0 only (no IEEE 802.15.4), lower RX sensitivity (-95 dBm BLE) | Lacks native Thread/Matter support; requires software MAC layer for 802.15.4, increasing CPU load and latency | Select when BLE-only operation suffices and legacy Nordic SDK ecosystem is preferred. |
| TI CC2652RB | Arm Cortex-M4F + integrated BAW resonator, BLE 5.1 + IEEE 802.15.4, no TrustZone, 352 KB flash, no FPU | BAW eliminates external crystal but limits frequency flexibility; smaller flash constrains complex Matter stack deployment | Select for crystal-free designs where BAW stability outweighs flash and security limitations. |
Compared with nRF52840 and CC2652RB, STM32WBA55CEU6 uniquely combines TrustZone-based hardware security, dual-protocol RF with superior sensitivity, and 1 MB ECC flash - making it the only option qualified for Matter 1.3 certification with end-to-end secure provisioning in a single die.
Availability
STM32WBA55CEU6 is available at Aetrix Electronics and suitable for smart home hubs, BLE audio beacons, industrial predictive maintenance nodes, and secure medical wearables requiring stable component supply across multi-year production cycles.
Supply support for STM32WBA55CEU6 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, specializing in microcontrollers, power management, sensors, and automotive ICs with strong focus on energy efficiency and security.
The STM32WBA series targets next-generation secure, low-power wireless IoT endpoints, designed specifically to accelerate Matter, Thread, and BLE 6.0 adoption with hardware-rooted trust and integrated RF.
FAQ
What development tools support STM32WBA55CEU6?
ST provides STM32CubeWBA firmware package, STM32CubeMX v6.12+ for pin/config generation, and STM32CubeIDE v1.15+ with built-in debugger support. Official evaluation boards include the STEVAL-WBA55CK1 (UFQFPN32 socketed) and B-U585I-IOT02A (for WBA55CG variant). Third-party Matter SDKs from Silicon Labs and Espressif integrate via ST's OpenThread port.
Does STM32WBA55CEU6 require an external crystal for RF operation?
No - it supports single-crystal operation using the 32 MHz HSE with internal load capacitance, eliminating external tuning capacitors. The integrated balun and RFIO pin are optimized for direct PCB antenna or chip antenna integration per AN5925 layout guidelines. External PA is optional and controlled via GPIO-driven enable lines.
How is TrustZone implemented in STM32WBA55CEU6?
TrustZone is implemented at silicon level with hardware-enforced memory isolation via SAU and GTZC controllers. Secure world executes only from protected flash regions (configured via RDP and HDP), accesses securable peripherals (e.g., SAES, PKA), and isolates debug interfaces. Non-secure world cannot access secure memory or initiate secure peripheral transactions without explicit gatekeeper permission.
What is the maximum output power and regulatory compliance status?
Maximum programmable output power is +10 dBm in 1 dB steps. The device complies with ETSI EN 300 328 (Europe), FCC CFR47 Part 15 (USA), and ARIB STD-T66 (Japan) when used with approved reference antennas and layout per ST's certified module documentation (e.g., STEVAL-WBA55CK1 test reports).
STM32WBA55CEU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Type:
- -
- RF Family/Standard:
- -
- Protocol:
- -
- Modulation:
- -
- Frequency:
- -
- Data Rate (Max):
- -
- Power - Output:
- -
- Sensitivity:
- -
- Memory Size:
- -
- Serial Interfaces:
- -
- GPIO:
- -
- Voltage - Supply:
- -
- Current - Receiving:
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- Current - Transmitting:
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- Operating Temperature:
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- Supplier Device Package:
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STM32WBA55CEU6 FAQ
1.How can I place an order for STM32WBA55CEU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WBA55CEU6 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 STM32WBA55CEU6 reliable?
The price and inventory of STM32WBA55CEU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WBA55CEU6 is usually 5 days.
3.What payment methods are accepted for STM32WBA55CEU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WBA55CEU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WBA55CEU6?
STM32WBA55CEU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WBA55CEU6 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 STM32WBA55CEU6?
For technical support, including STM32WBA55CEU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WBA55CEU6 requirements.
6.How does Aetrix verify that STM32WBA55CEU6 is sourced from the original manufacturer or authorized distributors?
All STM32WBA55CEU6 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 STM32WBA55CEU6 meets industry standards.
7.What is the process for return or replacement of STM32WBA55CEU6?
All STM32WBA55CEU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32WBA55CEU6, 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 STM32WBA55CEU6 part is unused and in its original packaging.
Return procedure for STM32WBA55CEU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32WBA55CEU6 Tags
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ESP32-D0WD-V3
Espressif Systems
-
ESP8266EX
Espressif Systems
-
ESP32-S3
Espressif Systems
-
NRF24L01P-R7
Nordic Semiconductor ASA
-
NRF24L01P-R
Nordic Semiconductor ASA
-
ESP32-U4WDH
Espressif Systems
-
DA14531-00000OG2
Renesas
-
ESP32-C6FH4
Espressif Systems
-
DA14531-00000FX2
Renesas
-
NRF24L01P-T
Nordic Semiconductor ASA
-
NRF52810-QCAA-R
Nordic Semiconductor ASA
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ESP32-S3FN8
Espressif Systems
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