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STMicroelectronics STM32WBA52KEU6
- Part No.:
- STM32WBA52KEU6
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32WBA52KEU6.pdf
- Description:
- IC RF TXRX+MCU BLE 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:6,175
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Product details
Overview
STM32WBA52KEU6 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, and ultra-low-power operation down to 160 nA Standby mode. Designed for secure, battery-powered IoT edge nodes such as smart locks and sensor hubs.
For engineers reviewing the STM32WBA52KEU6 datasheet, STM32WBA52KEU6 pinout, STM32WBA52KEU6 application, or STM32WBA52KEU6 equivalent, key selection criteria include its dual-protocol radio coexistence, TrustZone-enabled secure boot and firmware upgrade, 1 MB ECC flash with 100k write cycles, and support for Auracast™/AOA/AOD in compact WLCSP41 (2.76 × 2.98 mm) package.
Technical Context
The device integrates a dual-mode RF transceiver with hardware packet arbitration for concurrent BLE and IEEE 802.15.4 operation, enabling Matter-over-Thread and BLE mesh interoperability. Its FlexPowerControl architecture enables autonomous peripheral operation-including LPTIMs, comparators, and ADC oversampling-down to Stop 1 mode with 64 KB SRAM retention at 6.5 µA.
TrustZone enforces hardware-isolated secure and non-secure worlds: secure boot validates firmware via embedded RSS, while SAES and PKA accelerators offload AES-128/256, ECDSA, and SHA-256 operations. The ART Accelerator provides zero-wait-state execution from flash at up to 100 MHz, achieving 410 CoreMark® (4.10 CoreMark/MHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 @ up to 100 MHz with TrustZone®, MPU, DSP, and single-precision FPU - enables real-time deterministic control with hardware-enforced security partitioning. |
| Wireless Radio | 2.4 GHz transceiver supporting Bluetooth LE 6.0 (LE Audio, Isochronous Channels, Direction Finding) and IEEE 802.15.4-2015 (Thread v1.3, Matter 1.0, Zigbee 3.0) - allows single-chip multi-standard connectivity without external RF IC. |
| RX Sensitivity | -96 dBm @ 1 Mbps BLE / -97.5 dBm @ 250 kbps IEEE 802.15.4 - ensures robust link budget in dense RF environments like smart home gateways. |
| TX Output Power | Programmable from -20 to +10 dBm in 1 dB steps - enables precise range/power tuning for battery life optimization in portable sensors. |
| Power Consumption | 160 nA Standby (16 wake-up pins), 6.5 µA Stop (64 KB SRAM), 23 µA/MHz Run - supports >10-year coin-cell operation in always-on sensing applications. |
| Memory | 1 MB Flash (ECC, 256 KB rated for 100k cycles), 128 KB SRAM (64 KB with parity), 512-byte OTP - meets functional safety requirements for field-upgradable firmware with data integrity protection. |
| Security | Root of trust with unique boot entry, HDP, SFI, RHUK, DPA-resistant SAES/PKA/HASH, NIST SP800-90B TRNG - satisfies PSA Level 3 and SESIP certification prerequisites for connected medical and industrial devices. |
Pinout & Package
STM32WBA52KEU6 is packaged in WLCSP41 (2.76 × 2.98 mm, 0.4 mm pitch), optimized for space-constrained IoT endpoints. The package supports single-crystal 32 MHz operation and integrates balun to eliminate external RF matching components.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.71–3.6 V) | Supplies core, analog, and RF domains; supports dynamic voltage scaling between LDO and SMPS modes. |
| VSS | Ground reference | Dedicated analog/digital/RF ground pins minimize coupling noise in mixed-signal operation. |
| OSC_IN / OSC_OUT | 32 MHz crystal oscillator interface | Drives system clock and RF timing; internal load capacitors reduce BOM count. |
| RF_P / RF_N | Differential RF transceiver I/O | Direct connection to antenna or matching network; integrated balun eliminates discrete balun requirement. |
| BOOT0 | Boot mode selection | Configures boot source (system memory, flash, or SRAM); critical for secure firmware recovery sequences. |
| NRST | Active-low reset input | Hardware reset with glitch filtering; supports tamper-detection-triggered secure erase. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2 | General-purpose I/Os | Up to 35 GPIOs (most 5 V-tolerant); support multiple alternate functions including SAI, UART, SPI, I²C, and touch sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-protocol radio coexistence | Hardware-based packet traffic arbitration enables simultaneous BLE and IEEE 802.15.4 operation without CPU intervention - essential for Matter-compliant border routers. |
| TrustZone + Secure Firmware Installation | Embedded Root Secure Services (RSS) validate and install signed firmware images in secure world - prevents unauthorized OTA updates in regulated deployments. |
| FlexPowerControl low-power modes | Autonomous peripherals (LPTIM, COMP, ADC oversampling) remain active in Stop mode at 6.5 µA - enables continuous environmental monitoring without waking CPU. |
| Integrated RF balun & single-crystal operation | Eliminates external balun and 32 kHz crystal - reduces bill-of-materials by ≥3 components and PCB area by >15% in wearable designs. |
| SAI + LE Audio support | Serial Audio Interface with PDM/PCM/I²S formats enables direct microphone/speaker interfacing for Auracast™ broadcast audio - no external audio codec required. |
Applications
| Smart Lock Controller | Thread Border Router |
|---|---|
Use Scenario: Battery-powered residential smart lock with BLE provisioning and Thread-based remote access via home hub. IC Role / Device Role / Timing Role: Primary MCU executing secure BLE pairing, cryptographic key exchange, and Thread stack; RTC maintains time-synchronized audit logs. Use Value: Integrated TrustZone isolates credential storage from application code; +10 dBm TX extends reliable BLE range through doors/walls without external PA. | Use Scenario: Compact, fanless indoor border router bridging BLE devices to Thread/Matter networks over Ethernet/Wi-Fi. IC Role / Device Role / Timing Role: Dual-role radio controller managing concurrent BLE mesh and IEEE 802.15.4 Thread traffic; GPDMA handles packet forwarding between radio and host interface. Use Value: Hardware packet arbitration prevents RF collisions during high-throughput Matter commissioning; 1 MB flash stores full Thread stack and TLS certificates. |
| Industrial Wireless Sensor Node | LE Audio Broadcast Beacon |
Use Scenario: IP67-rated vibration/temperature sensor node deployed in factory machinery with 10+ year battery life. IC Role / Device Role / Timing Role: Ultra-low-power sensor aggregator sampling ADC/COMP at 1 Hz; LPTIM triggers periodic BLE advertisements with encrypted telemetry. Use Value: 160 nA Standby mode with 16 wake-up pins enables event-driven wake-up from deep sleep; integrated temperature sensor calibrates ADC readings in situ. | Use Scenario: Ceiling-mounted public address beacon broadcasting multilingual announcements to hearing aids via Auracast™. IC Role / Device Role / Timing Role: Isochronous channel transmitter synchronizing audio frames across multiple beacons; SAI interfaces directly to MEMS microphone array. Use Value: Hardware-supported LE Audio LC3 codec acceleration reduces CPU load by >40%; RF phase accuracy <2° enables precise AOA for directional audio steering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Nordic nRF52840 DK | BLE 5.0 only (no IEEE 802.15.4/Thread/Matter), no TrustZone, 1 MB flash but no ECC, higher 3.5 µA Stop current | Limited to BLE-only ecosystems; lacks native Matter support and hardware root of trust for regulated markets | Select when BLE-only functionality suffices and cost sensitivity outweighs security/multi-protocol needs. |
| Silicon Labs EFR32MG24 | Proprietary + Matter/Thread + BLE 5.3, no TrustZone (Secure Vault instead), 1.5 MB flash, 1.4 µA Deep Sleep | Strong Thread/Matter focus but weaker BLE audio features; Secure Vault offers different threat model than Arm TrustZone | Select for high-volume Thread gateway designs prioritizing ultra-low deep-sleep current over Arm ecosystem compatibility. |
Compared with Nordic nRF52840 and Silicon Labs EFR32MG24, STM32WBA52KEU6 uniquely combines Arm TrustZone, dual-protocol radio arbitration, and LE Audio hardware acceleration in a single die - simplifying certification for Matter 1.0 + BLE 6.0 converged devices while maintaining ST's automotive-grade reliability and long-term supply commitment.
Availability
STM32WBA52KEU6 is available at Aetrix Electronics and suitable for smart lock controllers, Thread border routers, industrial wireless sensor nodes, and LE Audio broadcast beacons requiring stable component supply and long-lifecycle support.
Supply support for STM32WBA52KEU6 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, delivering silicon solutions for automotive, industrial, and IoT markets with emphasis on energy efficiency, security, and reliability.
The STM32WBA series targets secure, low-power wireless edge nodes - designed specifically to accelerate Matter, Thread, and BLE 6.0 adoption in certified consumer and industrial IoT products with minimal external components.
FAQ
What wireless protocols does STM32WBA52KEU6 support natively in hardware?
STM32WBA52KEU6 integrates a single 2.4 GHz radio supporting Bluetooth LE 6.0 (including LE Audio, Isochronous Channels, Direction Finding, and Mesh) and IEEE 802.15.4-2015 (enabling Thread v1.3, Matter 1.0, and Zigbee 3.0) with hardware packet arbitration. No external RF IC or protocol stack licensing is required for certified implementation.
How does TrustZone implementation differ from software-based security solutions?
TrustZone provides hardware-enforced isolation between secure and non-secure worlds: memory regions, peripherals, and interrupts are physically gated by the Global TrustZone Controller (GTZC). This prevents malicious firmware from accessing cryptographic keys stored in HDP or tampering with secure boot flow - unlike software-only solutions vulnerable to privilege escalation attacks.
What is the minimum power supply configuration needed for full RF operation?
Full RF operation requires VDD = 1.71–3.6 V, 32 MHz crystal (with internal load caps), and proper RF layout per AN5514. The SMPS regulator must be enabled for optimal RF efficiency; LDO-only mode increases TX current by ~15%. External PA support is optional and controlled via GPIO-driven enable signals.
Can STM32WBA52KEU6 replace legacy STM32WB55 devices in existing designs?
Yes - STM32WBA52KEU6 is pin-compatible with STM32WB55CGU7 in WLCSP41 package and shares identical RF pinout (RF_P/RF_N), power domains, and bootloader interface. Migration requires firmware update to leverage enhanced TrustZone features, BLE 6.0 stack, and improved power modes, but no PCB redesign is needed.
STM32WBA52KEU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STM32WBA52xx
- Package/Case:
- 32-UFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Type:
- TxRx + MCU
- RF Family/Standard:
- Bluetooth
- Protocol:
- Bluetooth v5.3
- Modulation:
- GFSK
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 10dBm
- Sensitivity:
- -101dBm
- Memory Size:
- 512kB Flash, 64kB SRAM
- Serial Interfaces:
- ADC, GPIO, I2C, IrDA, SPI, UART, USART
- GPIO:
- 20
- Voltage - Supply:
- 1.71V ~ 3.6V
- Current - Receiving:
- 7.39mA ~ 8mA
- Current - Transmitting:
- 10.6mA ~ 20.4mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-UFQFPN (5x5)
STM32WBA52KEU6 FAQ
1.How can I place an order for STM32WBA52KEU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WBA52KEU6 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 STM32WBA52KEU6 reliable?
The price and inventory of STM32WBA52KEU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WBA52KEU6 is usually 5 days.
3.What payment methods are accepted for STM32WBA52KEU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WBA52KEU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WBA52KEU6?
STM32WBA52KEU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WBA52KEU6 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 STM32WBA52KEU6?
For technical support, including STM32WBA52KEU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WBA52KEU6 requirements.
6.How does Aetrix verify that STM32WBA52KEU6 is sourced from the original manufacturer or authorized distributors?
All STM32WBA52KEU6 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 STM32WBA52KEU6 meets industry standards.
7.What is the process for return or replacement of STM32WBA52KEU6?
All STM32WBA52KEU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32WBA52KEU6, 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 STM32WBA52KEU6 part is unused and in its original packaging.
Return procedure for STM32WBA52KEU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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