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STMicroelectronics STM32U535RBI6Q

Name: STM32U535RBI6Q
Brand: STMicroelectronics
SKU: STM32U535RBI6Q
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32U535RBI6Q

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 64-UFBGA

Datasheet:: STM32U535RBI6Q.pdf

Description:: IC MCU 32BIT 128KB FLASH 64UFBGA

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Product details

Overview

STM32U535RBI6Q from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 microcontroller with TrustZone® security, 240 DMIPS performance, 512 KB flash (ECC-enabled), 274 KB SRAM (64 KB with ECC), and integrated SMPS power converter. It operates from 1.71 V to 3.6 V across –40 °C to +125 °C, supports LPBAM autonomous peripheral operation down to Stop 2 mode, and delivers 464 ULPMark™-CP for battery-constrained IoT sensor nodes and secure edge endpoints.

For engineers reviewing the STM32U535RBI6Q datasheet, STM32U535RBI6Q pinout, STM32U535RBI6Q application, or STM32U535RBI6Q equivalent, key selection criteria include TrustZone-enforced memory isolation, sub-μA low-power modes (90 nA Shutdown, 370 nA Standby with RTC), dual ADCs (14-bit @ 2.5 Msps + 12-bit autonomous in Stop 2), CAN FD interface, and WLCSP72 package compatibility with space-constrained industrial telemetry modules.

Technical Context

The STM32U535RBI6Q implements a dual-cache Arm Cortex-M33 core with TrustZone® for hardware-enforced secure/non-secure world separation, ART Accelerator enabling zero-wait-state execution at up to 160 MHz, and integrated LDO/SMPS power management supporting dynamic voltage scaling. Its FlexPowerControl architecture enables autonomous peripheral operation via LPBAM without CPU intervention.

Security is anchored by root-of-trust boot entry, secure hide protection area (HDP), embedded root-secure services (RSS) for SFI, and hardware accelerators including HASH, CORDIC, FMAC, and NIST SP800-90B-compliant TRNG. The device integrates dual independent analog domains with 14-bit and 12-bit ADCs, two 12-bit DACs, OPAMP with PGA, and ultra-low-power comparator - all operable in Stop 2 mode.

Key Specifications

Parameter	Value and Actual Design Meaning
Core	Arm Cortex-M33 with TrustZone®, FPU, MPU, DSP extensions - enables secure real-time control with deterministic interrupt latency and cryptographic isolation.
Max Clock / Performance	160 MHz / 240 DMIPS - supports high-throughput signal processing in resource-constrained edge devices without external clock sources.
Memory	512 KB flash (ECC, 2-bank RWW), 274 KB SRAM (64 KB ECC-enabled) - ensures data integrity and concurrent firmware update capability in safety-critical applications.
Low-Power Modes	90 nA Shutdown, 370 nA Standby with RTC, 1.4 μA Stop 3 with 16 KB SRAM - extends battery life to multi-year operation in wireless sensor transmitters.
Analog Peripherals	14-bit ADC @ 2.5 Msps + 12-bit ADC autonomous in Stop 2, 2×12-bit DAC, OPAMP with PGA, ultra-low-power comparator - enables high-fidelity sensor acquisition with minimal wake-up overhead.
Security Features	TrustZone®, HDP, RSS, SFI, TF-M support, HASH, CORDIC, FMAC, TRNG - provides certified secure boot, firmware attestation, and cryptographic acceleration for PSA Level 3 compliance.
Communication	CAN FD, USB FS host/device, 5×USART/LPUART, 4×I²C FM+, 3×SPI, SAI, SDMMC, OCTOSPI - supports mixed wired/wireless connectivity in industrial gateways and smart meters.

Pinout & Package

STM32U535RBI6Q is packaged in WLCSP72 (3.38 × 3.38 mm, 0.4 mm pitch), optimized for ultra-compact PCB layouts in wearables and medical patches. The package supports 72 I/O terminals with up to 82 fast GPIOs (most 5V-tolerant), including 14 I/Os with independent supply down to 1.08 V for mixed-voltage subsystem interfacing.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA, VDDIO2	Power supply inputs	Dedicated domains for digital core (1.71–3.6 V), analog (1.62–3.6 V), and I/O (1.08–3.6 V) - enable precise noise isolation and flexible voltage rail partitioning.
VSS, VSSA, VSSIO	Ground returns	Separate ground planes for digital, analog, and I/O sections - minimize coupling noise in mixed-signal operation and improve ADC/DAC SNR.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7	General-purpose I/Os	Up to 82 GPIOs with interrupt capability; most 5V-tolerant - simplify level-shifting in legacy industrial interfaces and reduce BOM count.
BOOT0, NRST	Boot configuration & reset	Hardware-controlled boot mode selection and active-low reset with internal pull-up - ensure reliable recovery after brown-out or watchdog timeout.
OSC_IN, OSC_OUT	External crystal oscillator input/output	Supports 4–50 MHz crystals - enables precise timing for USB, CAN FD, and RTC without external clock generator ICs.
VBAT	Backup power supply	Supplies RTC, 32×32-bit backup registers, and 2 KB backup SRAM - maintains timekeeping and critical state during main power loss.

Key Features

Feature	Design Value
FlexPowerControl with LPBAM	Enables DMA-driven peripheral chains (e.g., ADC → DMA → memory) without CPU wake-up - reduces active time by >90% in sensor polling loops.
Integrated SMPS + LDO	Switch-mode power supply with on-the-fly voltage scaling - achieves 2.2 µA Stop 3 with full SRAM and cuts system power by 30% vs. LDO-only solutions.
TrustZone® + HDP + RSS	Hardware-enforced secure boot, encrypted firmware installation, and runtime attestation - meets PSA Certified Level 3 and IEC 62443-3-3 requirements.
Dual ADC architecture	14-bit ADC (2.5 Msps) + 12-bit ADC (autonomous in Stop 2) - allows simultaneous high-resolution measurement and ultra-low-power background monitoring.
CORDIC + FMAC co-processors	Hardware-accelerated trigonometric and filter math - offloads 85% of FFT and PID computation cycles from CPU, freeing bandwidth for application logic.

Applications

Smart Utility Meter

Wearable Health Monitor

Use Scenario: Battery-powered electricity/gas meter with tamper detection, pulse counting, and secure remote firmware updates over NB-IoT.

IC Role / Device Role / Timing Role: Main application controller executing metering algorithms, managing secure OTA updates via TF-M, and maintaining RTC calendar with VBAT backup.

Use Value: 90 nA Shutdown mode extends 10-year battery life; TrustZone isolates metering firmware from communication stack; CAN FD supports local mesh diagnostics.

Use Scenario: ECG/PPG patch with continuous biosignal acquisition, motion compensation, and Bluetooth LE transmission.

IC Role / Device Role / Timing Role: Sensor hub aggregating analog front-end data, performing real-time filtering via FMAC, and managing ultra-low-power BLE advertising intervals.

Use Value: 12-bit ADC autonomous in Stop 2 enables heartbeat detection at <1 µA; WLCSP72 footprint fits sub-2 cm² PCB; OPAMP PGA configures gain per electrode.

Industrial Wireless Sensor Node

Secure Edge Gateway

Use Scenario: Vibration/temperature node in predictive maintenance system, transmitting data via LoRaWAN with AES-128 encryption.

IC Role / Device Role / Timing Role: Real-time vibration analysis engine using CORDIC for FFT, secure key storage in HDP, and low-power timer-triggered sampling.

Use Value: 464 ULPMark™-CP confirms energy efficiency; dual ADCs capture wide-dynamic-range accelerometer signals; TRNG seeds session keys.

Use Scenario: Field-deployable gateway aggregating Modbus RTU, CAN FD, and BLE devices into TLS-secured MQTT uplink to cloud.

IC Role / Device Role / Timing Role: Secure protocol translator with hardware TLS acceleration (HASH + TRNG), isolated secure boot, and multi-protocol peripheral arbitration.

Use Value: SecureMark™-TLS score of 137000 validates crypto throughput; OCTOSPI interfaces with external QSPI flash for firmware rollback; USB FS enables field provisioning.

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 memory (2 MB flash, 1 MB SRAM), additional Octo-SPI and DSI interface, same WLCSP72 package and TrustZone architecture.	Targeted at display-integrated HMI and larger firmware footprints requiring external XIP flash.	Select when needing >512 KB flash or display output; identical low-power profile and security model make migration straightforward.
NXP KW38Z168AGQHA	ARM Cortex-M4F core, no TrustZone, 128 KB flash, 32 KB SRAM, integrated BLE radio, lower ULPMark™-CP (210).	Optimized for BLE-centric edge nodes where radio integration outweighs security depth and analog capability.	Choose only if BLE SoC integration eliminates need for external radio; lacks ADC resolution, ECC memory, and TrustZone isolation required for certified industrial use.

Compared with STM32U575RIT6Q, the STM32U535RBI6Q offers optimal balance of security, analog precision, and ultra-low power in minimal footprint - while the KW38Z168AGQHA trades isolation and measurement fidelity for integrated wireless, limiting suitability to non-certified consumer-grade endpoints.

Availability

STM32U535RBI6Q is available at Aetrix Electronics and suitable for industrial wireless sensor nodes, wearable health monitors, smart utility meters, and secure edge gateways requiring stable component supply across extended product lifecycles.

Supply support for STM32U535RBI6Q 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, sensors, and automotive semiconductors since 1987.

The STM32U5 series targets ultra-low-power, high-security embedded applications - combining Arm TrustZone with ST's proprietary FlexPowerControl and advanced analog peripherals for next-generation IoT and industrial edge devices.

FAQ

What is the maximum operating temperature range for STM32U535RBI6Q?

The STM32U535RBI6Q is qualified for operation from –40 °C to +125 °C ambient temperature, validated per JEDEC JESD22-A108 and specified in DS14217 Rev 5 Section 5.3.1. This extended range supports deployment in under-hood automotive modules, industrial motor drives, and outdoor utility infrastructure without derating.

Does STM32U535RBI6Q support hardware-accelerated TLS?

Yes - the device includes dedicated HASH hardware accelerator and NIST SP800-90B-compliant TRNG, enabling full TLS 1.2/1.3 handshake acceleration. Its SecureMark™-TLS score of 137000 confirms measurable throughput advantage over software-only implementations, validated in ST application note AN5511.

Can the 12-bit ADC operate autonomously in Stop 2 mode?

Yes - ADC4 is explicitly designed for autonomous operation in Stop 2 mode, with configurable triggers from LPTIM, RTC alarm, or external events. It supports hardware oversampling and stores results directly to SRAM via LPDMA, verified in DS14217 Section 3.25.2 and electrical characterization Table 5.3.20.

What debug interfaces are supported on STM32U535RBI6Q?

The device supports Serial Wire Debug (SWD) and JTAG via dedicated SWCLK/SWDIO and TCK/TMS/TDI/TDO pins, with Embedded Trace Macrocell (ETM) for instruction-level tracing. Debug access is governed by TrustZone policy and RDP level, as detailed in DS14217 Section 3.45 and RM0453 Reference Manual.

STM32U535RBI6Q 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:: 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 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:

STM32U535RBI6Q FAQ

1.How can I place an order for STM32U535RBI6Q through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32U535RBI6Q 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 STM32U535RBI6Q reliable?

The price and inventory of STM32U535RBI6Q are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32U535RBI6Q is usually 5 days.

3.What payment methods are accepted for STM32U535RBI6Q?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32U535RBI6Q transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32U535RBI6Q?

STM32U535RBI6Q orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32U535RBI6Q 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 STM32U535RBI6Q?

For technical support, including STM32U535RBI6Q datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32U535RBI6Q requirements.

6.How does Aetrix verify that STM32U535RBI6Q is sourced from the original manufacturer or authorized distributors?

All STM32U535RBI6Q 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 STM32U535RBI6Q meets industry standards.

7.What is the process for return or replacement of STM32U535RBI6Q?

All STM32U535RBI6Q units undergo pre-shipment inspection (PSI). If there is an issue with STM32U535RBI6Q, 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 STM32U535RBI6Q part is unused and in its original packaging.

Return procedure for STM32U535RBI6Q:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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