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STMicroelectronics STM32WBA55CGU7
- Part No.:
- STM32WBA55CGU7
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32WBA55CGU7.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:3,170
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Product details
Overview
STM32WBA55CGU7 from STMicroelectronics is a multiprotocol wireless 32-bit Arm® Cortex®-M33 MCU with TrustZone®, FPU, Bluetooth® LE 6.0, and IEEE 802.15.4 radio-integrated into a single UFBGA59 (5 × 5 mm) package. It delivers -97.5 dBm RX sensitivity at 250 kbps (IEEE 802.15.4), +10 dBm programmable TX power, 1 Mbyte ECC flash, 128-Kbyte SRAM (64 KB with parity), and operates from 1.71–3.6 V across -40 to 105°C for industrial-grade wireless sensor nodes and Matter-enabled edge devices.
For engineers reviewing the STM32WBA55CGU7 datasheet, STM32WBA55CGU7 pinout, STM32WBA55CGU7 application, or STM32WBA55CGU7 equivalent, key selection criteria include dual-protocol RF performance (BLE/802.15.4), TrustZone-based secure boot and firmware upgrade, ultra-low-power Stop mode (6.5 µA with 64-Kbyte SRAM), and hardware-accelerated cryptography (AES, PKA, RNG).
Technical Context
This MCU implements an Arm Cortex-M33 core with TrustZone security extensions, MPU, DSP, and single-precision FPU running up to 100 MHz, coupled with ART Accelerator enabling zero-wait-state execution from flash. The integrated 2.4 GHz RF transceiver supports concurrent BLE LE Audio, Thread, Matter, and Zigbee® stacks via hardware MAC and PHY layers.
Power management leverages FlexPowerControl with autonomous peripherals active down to Stop 1 mode, LDO/SMPS dual-regulator support with on-the-fly switching, and precise wake-up timing (e.g., 3.5 µs from Stop to Run). Security architecture includes securable I/Os, Root of Trust via unique boot entry and HDP, SFI with embedded RSS, and DPA-resistant AES/PKA accelerators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 @ 100 MHz with TrustZone®, MPU, DSP, and FPU - enables secure real-time control and cryptographic offload. |
| RF Performance | RX sensitivity: -97.5 dBm (IEEE 802.15.4 @ 250 kbps); TX output: +10 dBm programmable in 1 dB steps - meets ETSI/FCC/ARIB regulatory limits without external PA. |
| Memory | 1 Mbyte flash with ECC (256 KB rated for 100k cycles); 128-Kbyte SRAM (64 KB with parity); 512-byte OTP - ensures data integrity and long-term firmware reliability. |
| Ultra-Low Power | 6.5 µA Stop mode (64-Kbyte SRAM retained); 160 nA Standby (16 wake-up pins); 23 µA/MHz Run mode - extends battery life in coin-cell-powered IoT endpoints. |
| Security | TrustZone-enforced memory/peripheral isolation; Secure Firmware Installation (SFI); RHUK-based secure storage; NIST SP800-90B TRNG - satisfies PSA Level 3 and Matter certification requirements. |
| Peripherals | 12-bit ADC @ 2.5 Msps (16-bit oversampling); 3× UART, 2× SPI, 2× I²C Fm+, 1× SAI, 8-channel DMA - supports sensor fusion, audio streaming, and multi-interface gateway designs. |
Pinout & Package
STM32WBA55CGU7 uses a 59-ball UFBGA package (5 × 5 mm, 0.4 mm pitch) with 35 general-purpose I/Os (most 5 V-tolerant), dedicated RF matching pins (RFIO, RFVSS, RFVDD), and dual crystal inputs (HSE 32 MHz, LSE 32 kHz). The package supports high-density PCB layouts while maintaining RF performance integrity through optimized ground plane and decoupling pad placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFIO | RF Transceiver Antenna Interface | Differential RF port requiring matched 50 Ω trace; connects directly to antenna or balun output for minimal insertion loss. |
| RFVDD | RF Power Supply | Separate 1.2 V supply for RF block; must be filtered with dedicated 100 nF + 1 µF capacitors to suppress switching noise. |
| RFVSS | RF Ground Reference | Dedicated RF ground plane connection; isolated from digital ground to prevent coupling into sensitive receiver path. |
| HSE_IN / HSE_OUT | High-Speed Crystal Oscillator | 32 MHz crystal interface for system clock generation; requires external 12 pF load capacitors and tight layout symmetry. |
| LSE_IN / LSE_OUT | Low-Speed Crystal Oscillator | 32 kHz crystal for RTC and low-power timer operation; enables calendar functions and wake-up from Standby mode. |
| VDD / VSS | Digital Core Power/Ground | 1.71–3.6 V main supply; multiple VDD/VSS pairs ensure stable core voltage under dynamic RF transmit bursts. |
| BOOT0 | Boot Mode Selection | Active-high pin sampled at reset; determines boot source (system memory, flash, or SRAM) for firmware recovery or debug loading. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-Protocol Radio | Single 2.4 GHz transceiver supporting Bluetooth LE 6.0 (LE Audio, Direction Finding, Isochronous Channels) and IEEE 802.15.4 (Thread/Matter/Zigbee) - eliminates need for discrete RF ICs in smart home hubs. |
| Secure Boot & Lifecycle | Root of Trust established via unique boot entry and HDP; RDP-level protection and password-locked debug - prevents unauthorized firmware extraction or reprogramming. |
| Hardware Crypto Acceleration | Dual AES co-processors (one DPA-resistant); PKA with ECC acceleration; HASH unit; NIST SP800-90B TRNG - enables sub-100 ms OTA firmware updates with full signature verification. |
| Flexible Power Management | SMPS/LDO dual-regulator with on-the-fly switching; Stop mode current as low as 6.5 µA with full SRAM retention - sustains 10+ year battery life in LPWAN sensor deployments. |
| Analog Integration | 12-bit ADC with 2.5 Msps sampling and hardware oversampling to 16-bit resolution; two ultra-low-power comparators - supports precision environmental sensing without external signal conditioning. |
Applications
| Smart Home Sensor Node | Matter-Enabled Gateway |
|---|---|
Use Scenario: Battery-powered temperature/humidity/motion sensor reporting to cloud via Thread border router. IC Role / Device Role / Timing Role: Primary wireless SoC handling sensor acquisition, BLE provisioning, Thread network joining, and secure Matter endpoint communication. Use Value: Integrated BLE + 802.15.4 eliminates dual-radio BOM cost; TrustZone isolates Matter stack from application logic; 6.5 µA Stop mode enables >5-year CR2032 operation. | Use Scenario: Compact wall-plug gateway bridging BLE accessories to Wi-Fi/Ethernet infrastructure using Matter over Thread. IC Role / Device Role / Timing Role: Central protocol translator and secure Matter controller managing multiple concurrent BLE connections and Thread network layer. Use Value: Hardware-accelerated AES/PKA enables real-time encryption of Matter TLV payloads; SAI interface supports local voice assistant audio input/output. |
| Industrial Wireless Monitor | LE Audio Auracast Transmitter |
Use Scenario: DIN-rail mounted vibration/temperature monitor in factory automation, transmitting alerts via BLE mesh or direct cloud upload. IC Role / Device Role / Timing Role: Edge intelligence node performing FFT-based vibration analysis, secure OTA updates, and low-latency BLE mesh relay. Use Value: Cortex-M33+FPU executes real-time signal processing; 1 Mbyte flash stores dual firmware images for fail-safe updates; -40 to 105°C rating ensures reliability in harsh enclosures. | Use Scenario: Public venue audio transmitter broadcasting synchronized stereo streams to hundreds of LE Audio hearing aids via Auracast. IC Role / Device Role / Timing Role: Isochronous channel master generating time-synchronized audio packets with precise latency control and error resilience. Use Value: Dedicated hardware isochronous packet scheduler ensures <50 µs inter-stream jitter; +10 dBm TX power maintains coverage in large open spaces. |
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 @ 64 MHz; no IEEE 802.15.4 MAC/PHY hardware; BLE-only RF; 1 MB flash, 256 KB RAM; no TrustZone or SMPS | Lacks native Thread/Matter support; requires software MAC stack; lower security assurance level (no PSA-certified TZ) | Select when BLE-only functionality suffices and external 802.15.4 stack integration is acceptable. |
| Silicon Labs EFR32MG24 | ARM Cortex-M33 @ 78 MHz; proprietary multi-protocol stack; no TrustZone; 1536 KB flash, 256 KB RAM; integrated DC-DC | Proprietary SDK limits Matter/Thread flexibility; lacks PSA-certified secure boot and SFI framework | Select for legacy Silicon Labs ecosystem projects where Gecko SDK compatibility is mandatory. |
Compared with Nordic nRF52840 and Silicon Labs EFR32MG24, STM32WBA55CGU7 uniquely integrates hardware-accelerated Matter/Thread support, PSA Level 3-certified TrustZone, and dual SMPS/LDO regulation-enabling certified, low-risk development of interoperable smart home and industrial wireless products.
Availability
STM32WBA55CGU7 is available at Aetrix Electronics and suitable for smart home sensor nodes, Matter gateways, industrial wireless monitors, and LE Audio transmitters requiring stable component supply, long-term lifecycle commitment, and regulatory-compliant RF performance.
Supply support for STM32WBA55CGU7 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, analog ICs, power management, and MEMS sensors for industrial, automotive, and consumer markets.
The STM32WBA series targets secure, low-power wireless edge devices-specifically engineered to accelerate Matter, Thread, and BLE 6.0 product certification with built-in hardware security and multi-protocol RF integration.
FAQ
What RF certifications does STM32WBA55CGU7 support out-of-the-box?
STM32WBA55CGU7 is designed to meet ETSI EN 300 328, EN 300 440, FCC CFR47 Part 15, and ARIB STD-T66 radio compliance requirements. Its integrated balun, calibrated TX power, and documented RF layout guidelines enable pre-certified module integration-reducing time-to-market for end-product certification by eliminating custom RF validation effort.
Does STM32WBA55CGU7 support Matter over Thread without external components?
Yes-STM32WBA55CGU7 includes full hardware implementation of IEEE 802.15.4-2015 PHY and MAC layers, enabling native Matter-over-Thread operation. The device ships with ST's certified OpenThread stack and supports all required security primitives (P256 ECDSA, SHA-256) via on-chip PKA and HASH accelerators-no external crypto IC or RF front-end is needed.
How does TrustZone implementation differ between STM32WBA55CGU7 and legacy STM32L4 MCUs?
Unlike STM32L4's software-managed memory protection, STM32WBA55CGU7 implements Arm TrustZone at silicon level with dedicated Global TrustZone Controller (GTZC), secure boot ROM, and hardware-enforced isolation of secure/non-secure worlds. This enables PSA Certified Level 3 security, including secure firmware installation (SFI), root secure services (RSS), and tamper detection-features absent in non-TrustZone Cortex-M4 MCUs.
Can the integrated SMPS be used alongside the LDO in mixed-power-domain designs?
Yes-the STM32WBA55CGU7 supports dynamic on-the-fly switching between SMPS and LDO regulators, allowing designers to optimize efficiency (SMPS) during active RF transmission and noise-sensitive analog operation (LDO) during precision ADC sampling. Voltage scaling is controlled via PWR_CR1 register, with automatic transition sequencing managed by hardware.
STM32WBA55CGU7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 48-UFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Type:
- TxRx + MCU
- RF Family/Standard:
- 802.15.4, Bluetooth
- Protocol:
- Bluetooth, Zigbee®
- Modulation:
- -
- Frequency:
- -
- Data Rate (Max):
- -
- Power - Output:
- -
- Sensitivity:
- -
- Memory Size:
- -
- Serial Interfaces:
- GPIO, HCI, I2S, UART, USART
- GPIO:
- -
- Voltage - Supply:
- -
- Current - Receiving:
- -
- Current - Transmitting:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-UFQFPN (7x7)
STM32WBA55CGU7 FAQ
1.How can I place an order for STM32WBA55CGU7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32WBA55CGU7 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 STM32WBA55CGU7 reliable?
The price and inventory of STM32WBA55CGU7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32WBA55CGU7 is usually 5 days.
3.What payment methods are accepted for STM32WBA55CGU7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32WBA55CGU7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32WBA55CGU7?
STM32WBA55CGU7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32WBA55CGU7 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 STM32WBA55CGU7?
For technical support, including STM32WBA55CGU7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32WBA55CGU7 requirements.
6.How does Aetrix verify that STM32WBA55CGU7 is sourced from the original manufacturer or authorized distributors?
All STM32WBA55CGU7 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 STM32WBA55CGU7 meets industry standards.
7.What is the process for return or replacement of STM32WBA55CGU7?
All STM32WBA55CGU7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32WBA55CGU7, 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 STM32WBA55CGU7 part is unused and in its original packaging.
Return procedure for STM32WBA55CGU7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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