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STMicroelectronics STM32U535REI6Q
- Part No.:
- STM32U535REI6Q
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA
- Datasheet:
-
STM32U535REI6Q.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,717
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Product details
Overview
STM32U535REI6Q from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 microcontroller with TrustZone® security, 512 KB flash, 274 KB SRAM, and integrated FPU/MPU-designed for secure, battery-constrained IoT edge nodes requiring real-time sensor fusion, cryptographic operations, and autonomous low-power peripheral operation down to Stop 2 mode. It delivers 240 DMIPS at 160 MHz with 464 ULPMark™-CP and supports CAN FD, USB FS, Octo-SPI, and hardware-accelerated CORDIC/FMAC.
For engineers reviewing the STM32U535REI6Q datasheet, STM32U535REI6Q pinout, STM32U535REI6Q application, or STM32U535REI6Q equivalent, key selection criteria include verified TrustZone-enabled secure boot flow, sub-μA Stop 3 current (1.4 µA with 16-KB SRAM), dual 14-/12-bit ADCs with autonomous sampling in Stop 2, and LQFP64 package compatibility with industrial temperature range (–40 °C to +125 °C).
Technical Context
The STM32U535REI6Q implements a dual-bank flash architecture with ECC and read-while-write capability, enabling seamless firmware updates without halting execution. Its FlexPowerControl system integrates SMPS + LDO with on-the-fly voltage scaling and dynamic power gating across multiple low-power modes-including 90 nA Shutdown and 370 nA Standby with RTC.
TrustZone® is implemented at silicon level with GTZC (Global TrustZone Controller), securable I/Os, memory regions, and peripherals; boot integrity relies on unique entry point, HDP (Hide Protection Area), and RDP-controlled debug access. The ART Accelerator includes 8-KB instruction cache and 4-KB data cache, enabling zero-wait-state execution from flash at 160 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 with TrustZone®, FPU, MPU, DSP extensions - enables secure real-time control with hardware-isolated secure/non-secure worlds. |
| Max Clock / Performance | 160 MHz / 240 DMIPS - supports deterministic real-time processing for motor control, audio, and sensor fusion. |
| Memory | 512 KB flash (ECC, 2 banks, RWW), 274 KB SRAM (up to 64 KB with ECC) - ensures robust code storage and runtime data integrity in harsh environments. |
| Low-Power Modes | 90 nA Shutdown, 370 nA Standby w/RTC, 1.4 µA Stop 3 w/16-KB SRAM - extends battery life in always-on sensing and telemetry applications. |
| Analog Peripherals | 14-bit ADC @ 2.5 Msps (HW oversampling), 12-bit ADC autonomous in Stop 2, dual 12-bit DAC, OPAMP+PGA, comparator - enables high-precision signal acquisition without waking core. |
| Security Features | TrustZone, 96-bit UID, 512-byte OTP, HASH accelerator, NIST SP800-90B TRNG, Secure Firmware Install (SFI), TF-M support - meets PSA Level 3 and SESIP certification prerequisites. |
| Communication | CAN FD, USB FS (host/device), 4× I²C FM+, 5× USART/LPUART, 3× SPI, SAI, SDMMC, Octo-SPI - provides flexible connectivity for industrial gateways and secure edge devices. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; 64-pin layout optimized for EMI resilience and thermal dissipation in compact industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Supports 1.71–3.6 V operation; decoupling required per datasheet section 5.1.6 for stable SMPS/LDO co-regulation. |
| VDDA, VSSA | Analog domain supply and ground | Independent analog rail enables noise-isolated ADC/DAC/OPAMP operation with <±1 LSB INL over full temp range. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external push-button or supervisor IC assertion (tRESET min = 20 ns). |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | Up to 82 fast I/Os; most 5V-tolerant, 14 support independent 1.08–3.6 V supply - enables mixed-voltage interfacing with legacy sensors and logic. |
| PC13–PC15 | RTC-related pins (LSE, RTC_OUT) | Dedicated 32.768 kHz crystal interface with built-in load capacitance tuning - eliminates external caps for cost-sensitive RTC designs. |
| PA11/PA12 | USB D+/D− | Full-speed USB 2.0 transceiver with internal termination and pull-up - requires no external PHY or resistors for basic device/host enumeration. |
Key Features
| Feature | Design Value |
|---|---|
| LPBAM (Low-Power Background-Autonomous Mode) | Permits DMA-driven peripheral chains (ADC→DMA→memory→timer trigger) without CPU wake-up - reduces active time by >90% in periodic sensing. |
| FlexPowerControl with SMPS+LDO | Switch-mode power supply achieves >85% efficiency at 100 mA; LDO fallback ensures glitch-free transition during load transients - critical for battery-powered reliability. |
| CORDIC + FMAC co-processors | Hardware acceleration for trigonometric, hyperbolic, and filter coefficient computation - cuts FFT/motor FOC execution time by 4× vs. software-only M33. |
| Secure Root of Trust (HDP + RDP) | Immutable boot vector + password-protected debug disables unauthorized firmware extraction - satisfies IEC 62443-3-3 SL2 requirements for industrial controllers. |
| Autonomous ADC in Stop 2 | 12-bit ADC samples at 2.5 Msps while CPU and most clocks are halted - enables continuous vibration monitoring with <2 µA total system current. |
Applications
| Smart Utility Metering | Industrial Predictive Maintenance Sensor |
|---|---|
Use Scenario: Battery-powered gas/water meter collecting pressure, temperature, and flow data every 15 minutes for encrypted transmission via NB-IoT. IC Role / Device Role / Timing Role: Primary MCU executing secure TLS handshake, AES-128 encryption, and LPBAM-triggered ADC sampling during Stop 2 mode. Use Value: 370 nA Standby + RTC enables 10+ year battery life; TrustZone isolates crypto keys from application firmware. | Use Scenario: Vibration and temperature node mounted on rotating machinery, performing FFT-based anomaly detection at edge. IC Role / Device Role / Timing Role: Real-time signal processor running CORDIC-accelerated FFT and FMAC-based FIR filtering while managing CAN FD telemetry bursts. Use Value: 240 DMIPS + 160 MHz clock sustains 4-kHz sampling with <50 µs latency; dual ADCs capture synchronized analog channels. |
| Secure Medical Wearable | Automotive Body Control Module (BCM) Subsystem |
Use Scenario: ECG patch with dry electrodes, storing 24-hour waveform history and transmitting HIPAA-compliant summaries via BLE gateway. IC Role / Device Role / Timing Role: Secure data concentrator with TRNG-generated session keys, ECC-256 signing, and tamper-detecting backup registers. Use Value: 512-byte OTP stores device-specific keys; 96-bit UID enables cryptographic binding to cloud identity services. | Use Scenario: Low-power door module controlling window lift, mirror fold, and interior lighting with LIN/UART diagnostics. IC Role / Device Role / Timing Role: Power-managed subsystem MCU handling wake-on-LIN, PWM motor control, and secure firmware updates over CAN FD. Use Value: 1.4 µA Stop 3 mode preserves configuration during ignition-off; CAN FD supports 5 Mbps reprogramming with CRC-21 protection. |
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 |
|---|---|---|---|
| STM32U575RIT6Q | Higher flash (2 MB), larger SRAM (1 MB), added Ethernet MAC and JPEG codec - no Octo-SPI; same LQFP64 footprint. | Targeted at HMI-capable gateways requiring local image/video processing - not suitable for space-constrained meters. | Select when needing >512 KB flash or Ethernet connectivity; verify PCB layout compatibility with identical pinout but different peripheral mapping. |
| NXP LPC55S69JBD100 | Arm Cortex-M33, 640 KB flash, 320 KB SRAM, no TrustZone-certified boot ROM; uses separate SE050 secure element for PKI. | Requires external secure element for root-of-trust - increases BOM cost and board area vs. integrated HDP/RDP in STM32U535REI6Q. | Choose only if existing design uses NXP toolchain and SE050 ecosystem; lacks LPBAM and sub-µA Stop modes critical for multi-year battery life. |
Compared with STM32U575RIT6Q, the STM32U535REI6Q trades flash capacity for lower static current and integrated Octo-SPI; versus LPC55S69JBD100, it delivers superior out-of-box security and verified ultra-low-power autonomy without external components.
Availability
STM32U535REI6Q is available at Aetrix Electronics and suitable for smart utility metering, predictive maintenance sensors, secure medical wearables, and automotive BCM subsystems requiring stable component supply across extended product lifecycles.
Supply support for STM32U535REI6Q 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 management ICs, MEMS, and automotive semiconductors since 1987.
The STM32U5 series targets ultra-low-power, secure edge computing - engineered specifically for battery-operated IoT endpoints demanding PSA Certified Level 3 security, sub-µA sleep currents, and hardware-accelerated math for AI-at-the-edge workloads.
FAQ
What is the maximum operating temperature rating for STM32U535REI6Q?
The STM32U535REI6Q is qualified for industrial operation from –40 °C to +125 °C ambient temperature, validated per JEDEC JESD22-A108 and supported by full electrical characterization up to 125 °C in the DS14217 Rev 5 datasheet (Section 5.3.1). This rating applies to all LQFP64 variants including the I6Q suffix.
Does STM32U535REI6Q support hardware-based secure boot without external components?
Yes - it implements a silicon-rooted secure boot using immutable boot vector, HDP (Hide Protection Area), and RDP (Readout Protection) levels. Boot code executes from trusted ROM before loading user firmware from flash, with optional hash verification via embedded RSS (Root-Secure Services); no external secure element is required.
Can the STM32U535REI6Q achieve true 1.4 µA Stop 3 current in production systems?
Yes - the 1.4 µA specification (with 16-KB SRAM retained) is measured under defined conditions: VDD = 3.3 V, TA = 25 °C, all peripherals disabled except required wakeup sources, and SMPS enabled. Real-world designs achieve ≤1.6 µA with proper PCB layout, decoupling, and unused pin configuration per AN5545 guidelines.
Is the LQFP64 package of STM32U535REI6Q pin-compatible with other STM32U5x variants?
Yes - all STM32U535xx and STM32U575xx LQFP64 packages (e.g., STM32U535RC, STM32U575RI) share identical mechanical footprint and pinout. However, peripheral assignment differs (e.g., Octo-SPI present in U535 but not U575), so firmware and schematic validation is required despite mechanical compatibility.
STM32U535REI6Q 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:
- 47
- Program Memory Size:
- 512KB (512K 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 15x12/14b SAR; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32U535REI6Q FAQ
1.How can I place an order for STM32U535REI6Q through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32U535REI6Q 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 STM32U535REI6Q reliable?
The price and inventory of STM32U535REI6Q are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32U535REI6Q is usually 5 days.
3.What payment methods are accepted for STM32U535REI6Q?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32U535REI6Q transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32U535REI6Q?
STM32U535REI6Q orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32U535REI6Q 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 STM32U535REI6Q?
For technical support, including STM32U535REI6Q datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32U535REI6Q requirements.
6.How does Aetrix verify that STM32U535REI6Q is sourced from the original manufacturer or authorized distributors?
All STM32U535REI6Q 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 STM32U535REI6Q meets industry standards.
7.What is the process for return or replacement of STM32U535REI6Q?
All STM32U535REI6Q units undergo pre-shipment inspection (PSI). If there is an issue with STM32U535REI6Q, 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 STM32U535REI6Q part is unused and in its original packaging.
Return procedure for STM32U535REI6Q:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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