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STMicroelectronics STM32U535RBI6
- Part No.:
- STM32U535RBI6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA
- Datasheet:
-
STM32U535RBI6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,709
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Product details
Overview
STM32U535RBI6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 microcontroller with TrustZone® security, 512 KB flash, 274 KB SRAM, and integrated SMPS power management. It delivers 240 DMIPS at up to 160 MHz, supports LPBAM autonomous peripheral operation down to Stop 2 mode, and includes hardware accelerators (CORDIC, FMAC, HASH) for secure, real-time signal processing in battery-constrained IoT edge nodes.
For engineers reviewing the STM32U535RBI6 datasheet, STM32U535RBI6 pinout, STM32U535RBI6 application, or STM32U535RBI6 equivalent, key selection criteria include its 90 nA Shutdown current, 14-bit 2.5-Msps ADC with Stop 2 autonomy, dual 12-bit DACs, CAN FD interface, and WLCSP56 package suitability for space-constrained wearables and sensor hubs.
Technical Context
The STM32U535RBI6 implements a dual-cache Arm Cortex-M33 core (8 KB I-Cache, 4 KB D-Cache) with TrustZone-enabled memory isolation, MPU, FPU, and DSP extensions. Its FlexPowerControl architecture integrates LDO and SMPS regulators with on-the-fly voltage scaling and dynamic power gating across multiple low-power modes.
Security is enforced via Root of Trust boot entry, Secure Hide Protection Area (HDP), embedded Root-Secure Services (RSS), and securable peripherals including ECC-protected flash/SRAM, True Random Number Generator (NIST SP800-90B compliant), and hardware-accelerated TLS via SecureMark™-TLS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 with TrustZone®, FPU, MPU, and DSP extensions - enables secure, deterministic real-time control with hardware-enforced privilege separation. |
| Max Clock Speed | 160 MHz - achieves 240 DMIPS and 4.07 CoreMark®/MHz, supporting high-throughput sensor fusion and audio preprocessing. |
| Flash Memory | 512 KB with ECC and read-while-write - ensures data integrity and concurrent firmware updates without system interruption. |
| SRAM | 274 KB total, up to 64 KB with ECC - provides ample buffer space for cryptographic operations and multi-threaded RTOS workloads. |
| Low-Power Modes | 90 nA Shutdown, 370 nA Standby+RTC, 1.4 µA Stop 3 (16 KB SRAM retained) - extends battery life in always-on environmental monitors and medical patches. |
| Analog Peripherals | 14-bit 2.5-Msps ADC (autonomous in Stop 2), dual 12-bit DACs, OPAMP with PGA, ultra-low-power comparator - enables precision analog sensing without waking the core. |
| Security Features | TrustZone®, 96-bit unique ID, 512-byte OTP, HASH accelerator, CORDIC/FMAC co-processors - meets PSA Level 3 and SESIP certification requirements for secure firmware installation and OTA updates. |
Pinout & Package
STM32U535RBI6 uses a 56-ball WLCSP (3.38 × 3.38 mm, 0.4 mm pitch) package optimized for ultra-compact PCB layouts. The ballout supports full peripheral functionality including dual OCTOSPI, USB FS, CAN FD, SDMMC, and 82 GPIOs (5V-tolerant on most pins).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Core, analog, and I/O supply rails | Independent 1.71–3.6 V domains enable mixed-signal precision and flexible power sequencing in multi-rail systems. |
| VSS, VSSA, VSSIO2 | Ground references | Dedicated analog/digital grounds minimize noise coupling into ADC/DAC paths and improve SNR performance. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7 | General-purpose I/Os | 82 fast GPIOs with interrupt capability; up to 14 support independent 1.08–3.6 V supply for interfacing with low-voltage sensors. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external supervisory circuits for fail-safe system recovery. |
| BOOT0 | Boot mode selection | Configures boot source (system memory, main flash, or SRAM); critical for secure bootloader execution and field firmware recovery. |
| USB_DP / USB_DM | USB Full-Speed differential pair | Integrated transceiver supports host/device roles without external PHY - reduces BOM cost and board area in portable diagnostics tools. |
| FDCAN1_TX / FDCAN1_RX | CAN FD controller interface | Enables high-speed (up to 5 Mbps), time-triggered communication for industrial automation and automotive subsystems. |
Key Features
| Feature | Design Value |
|---|---|
| LPBAM (Low-Power Background-Autonomous Mode) | Permits DMA-driven peripheral chains (ADC→DMA→memory) while CPU remains in Stop 2 - eliminates wake-up latency in continuous sensor logging. |
| FlexPowerControl with SMPS | Switch-mode power supply reduces active-mode current by ~30% vs. LDO-only operation - extends runtime in coin-cell-powered devices beyond 5 years. |
| TrustZone + HDP + RSS | Hardware-enforced secure boot, isolated secure firmware update, and tamper-resistant key storage - satisfies IEC 62443-3-3 SL2 and Common Criteria EAL4+ requirements. |
| CORDIC & FMAC Co-processors | Accelerates trigonometric, vector, and filter computations in <100 ns per operation - offloads CPU for real-time motor control and adaptive filtering in hearing aids. |
| 14-bit ADC with Oversampling | 2.5-Msps sampling + hardware oversampling yields effective resolution up to 16 bits at 125 kSps - replaces external precision ADCs in gas detection and ECG front-ends. |
Applications
| Wearable Health Monitor | Industrial Wireless Sensor Node |
|---|---|
Use Scenario: Continuous ECG and SpO₂ acquisition in a wrist-worn patch with 7-day battery life. IC Role / Device Role / Timing Role: Primary MCU executing secure BLE stack, analog front-end control, and real-time QRS detection using CORDIC/FMAC. Use Value: 90 nA Shutdown and LPBAM enable sub-µA average current during sleep; 14-bit ADC with Stop 2 autonomy captures biopotentials without CPU intervention. | Use Scenario: Battery-powered vibration and temperature monitoring on rotating machinery with LoRaWAN backhaul. IC Role / Device Role / Timing Role: Edge AI inference node performing FFT-based fault classification using FMAC-accelerated filters and CAN FD local bus aggregation. Use Value: 370 nA Standby+RTC allows precise wake scheduling; dual OCTOSPI interfaces external PSRAM for ML model storage without compromising low-power budget. |
| Smart Metering Endpoint | Secure Access Control Module |
Use Scenario: UL-listed electricity meter with anti-tamper detection, metrology-grade ADC, and encrypted firmware updates. IC Role / Device Role / Timing Role: Trusted execution environment for metrology calculations, secure key management, and TLS 1.3 communication with utility backend. Use Value: TrustZone isolates secure boot and crypto engines; 512-byte OTP stores device-specific keys; HASH accelerator achieves 12 MB/s TLS throughput. | Use Scenario: Door controller with fingerprint matching, NFC reader interface, and secure audit log storage. IC Role / Device Role / Timing Role: Root-of-trust anchor managing biometric template encryption, secure element communication (via SPI), and tamper-evident event logging. Use Value: HDP protects secure boot code; 96-bit unique ID binds firmware to hardware; VBAT domain retains RTC and 2 KB backup SRAM during main power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power secure MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32U575RIT6 | Higher flash (2 MB), larger SRAM (1 MB), dual-core Cortex-M33 + Cortex-M0+, additional Octo-SPI and SAI interfaces | Targeted at audio edge AI and complex HMI applications requiring richer multimedia support | Select when needing >512 KB flash, dual-core partitioning, or stereo audio processing - not drop-in compatible due to pin count and peripheral mapping differences. |
| NXP KW38 | ARM Cortex-M4F core, no TrustZone, integrated BLE 5.0 radio, lower flash (512 KB), no SMPS, higher active current (3.2 µA/MHz) | Optimized for Bluetooth LE mesh nodes where RF integration outweighs ultra-low-power analog or security requirements | Choose only if BLE SoC integration is mandatory and TrustZone/ECC flash are non-critical - lacks LPBAM, Stop 2 ADC autonomy, and hardware TLS acceleration. |
Compared with STM32U535RBI6, the STM32U575RIT6 offers greater memory and compute headroom for advanced edge AI but requires PCB redesign; the KW38 trades security and ultra-low-power analog capability for integrated wireless, making it unsuitable for certified medical or industrial safety applications.
Availability
STM32U535RBI6 is available at Aetrix Electronics and suitable for wearable health monitors, industrial wireless sensor nodes, smart metering endpoints, and secure access control modules requiring stable component supply and long-term lifecycle assurance.
Supply support for STM32U535RBI6 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, specializing in microcontrollers, power management, sensors, and automotive ICs with over 40 years of industrial reliability.
The STM32U5 series targets ultra-low-power, secure IoT edge devices - designed to unify energy efficiency, hardware-enforced security, and rich analog/mixed-signal capability in a single chip for certified medical, industrial, and consumer applications.
FAQ
What is the maximum operating temperature range for STM32U535RBI6?
The STM32U535RBI6 is rated for –40 °C to +125 °C operation, validated across all low-power modes and peripheral functions. This extended range supports deployment in under-hood automotive sensors, industrial PLCs, and outdoor environmental monitoring equipment without thermal derating.
Does STM32U535RBI6 support hardware-accelerated cryptography?
Yes - it includes a dedicated HASH hardware accelerator supporting SHA-1, SHA-224, and SHA-256 algorithms at up to 12 MB/s, plus a NIST SP800-90B-compliant True Random Number Generator (TRNG). These blocks operate independently of the CPU and are accessible only from the secure world when TrustZone is enabled.
Can the STM32U535RBI6's ADC operate autonomously in low-power modes?
Yes - the 14-bit ADC1 and 12-bit ADC4 can perform conversions and trigger DMA transfers while the CPU remains in Stop 2 mode. This LPBAM capability enables continuous sensor sampling at sub-µA system current, with hardware oversampling configurable to boost effective resolution without software overhead.
What debug interfaces are supported on STM32U535RBI6?
The device supports Serial Wire Debug (SWD) and JTAG via dedicated pins, with full Embedded Trace Macrocell (ETM) support for instruction-level tracing. Debug access is protected by RDP (Readout Protection) levels and password-locked secure debug, enforceable only when TrustZone is active and debug is disabled in secure configuration.
STM32U535RBI6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-UFBGA
- Series:
- STM32U5
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M33
- Core Size:
- 32-Bit
- Speed:
- 160MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, SAI, SmartCard, SPDIF, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, Motor Control PWM, POR, PWM, WDT
- Number of I/O:
- 51
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 274K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 17x12/14b SAR; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32U535RBI6 FAQ
1.How can I place an order for STM32U535RBI6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32U535RBI6 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 STM32U535RBI6 reliable?
The price and inventory of STM32U535RBI6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32U535RBI6 is usually 5 days.
3.What payment methods are accepted for STM32U535RBI6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32U535RBI6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32U535RBI6?
STM32U535RBI6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32U535RBI6 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 STM32U535RBI6?
For technical support, including STM32U535RBI6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32U535RBI6 requirements.
6.How does Aetrix verify that STM32U535RBI6 is sourced from the original manufacturer or authorized distributors?
All STM32U535RBI6 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 STM32U535RBI6 meets industry standards.
7.What is the process for return or replacement of STM32U535RBI6?
All STM32U535RBI6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32U535RBI6, 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 STM32U535RBI6 part is unused and in its original packaging.
Return procedure for STM32U535RBI6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32U535RBI6 Tags
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