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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics STM32U535RCT6Q

Name: STM32U535RCT6Q
Brand: STMicroelectronics
SKU: STM32U535RCT6Q
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32U535RCT6Q

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 64-LQFP

Datasheet:: STM32U535RCT6Q.pdf

Description:: IC MCU 32BIT 256KB FLASH 64LQFP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STM32U535RCT6Q 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 (up to 64 KB with ECC), and integrated SMPS power management. It operates from 1.71 V to 3.6 V across –40 °C to +85 °C and supports LPBAM autonomous peripheral operation down to Stop 2 mode - ideal for battery-powered IoT edge nodes requiring secure, long-life operation.

For engineers reviewing the STM32U535RCT6Q datasheet, STM32U535RCT6Q pinout, STM32U535RCT6Q application, or STM32U535RCT6Q equivalent, key selection considerations include its 48-pin LQFP package, TrustZone-enforced memory/peripheral isolation, sub-µA low-power modes (e.g., 90 nA Shutdown), dual ADCs (14-bit + 12-bit), CAN FD interface, and hardware accelerators (CORDIC, FMAC, HASH, RNG).

Technical Context

This MCU implements a dual-cache Arm Cortex-M33 core with MPU, FPU, and TrustZone® for hardware-enforced secure/non-secure world separation. The ART Accelerator includes 8-KB instruction cache and 4-KB data cache, enabling zero-wait-state execution at up to 160 MHz.

Power architecture integrates an embedded LDO and configurable SMPS step-down converter with on-the-fly voltage scaling. Security features include root-of-trust boot, 96-bit unique ID, 512-byte OTP, securable I/Os, and Secure Firmware Installation (SFI) via embedded Root-Secure Services (RSS).

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M33 with TrustZone®, FPU, MPU - enables secure real-time control with hardware-isolated execution environments
Max Clock Speed	160 MHz - delivers 240 DMIPS and 4.07 CoreMark®/MHz for high-efficiency signal processing
Flash Memory	512 KB with ECC and read-while-write - ensures firmware integrity and concurrent code/data access
SRAM	274 KB total, including up to 64 KB with ECC - supports large buffers and secure data storage
Low-Power Modes	90 nA Shutdown, 370 nA Standby with RTC - extends battery life in always-on sensor or metering applications
Analog Peripherals	14-bit 2.5-Msps ADC + 12-bit 2.5-Msps ADC (autonomous in Stop 2), 2× DAC, OPAMP, COMP - enables precision sensing without waking core
Security Features	TrustZone®, secure boot, HDP, RDP, SFI, HASH, NIST SP800-90B-compliant RNG - meets PSA Level 3 and SESIP certification requirements
Communication Interfaces	CAN FD, USB FS (host/device), 5× USART/LPUART, 4× I²C FM+, 3× SPI, OCTOSPI, SAI, SDMMC - supports industrial connectivity and audio/data streaming

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad - suitable for compact PCB layouts and moderate thermal dissipation in space-constrained designs.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Core power supply and ground	Supports 1.71–3.6 V operation; decoupling required per datasheet layout guidelines
VDDA, VSSA	Analog domain supply and ground	Independent analog rail for ADC/DAC/OPAMP - improves noise immunity and measurement accuracy
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15	General-purpose I/Os	Up to 82 fast I/Os; most 5V-tolerant, 14 support independent 1.08–3.6 V supply for mixed-voltage interfacing
NRST	Active-low reset input	Asynchronous reset with internal pull-up; compatible with external reset supervisors
BOOT0	Boot mode selection	Configures boot source (system memory, flash, or SRAM) at power-up - critical for firmware recovery and DFU
SWDIO/SWCLK	Serial Wire Debug interface	2-pin debug port supporting full SWD functionality - enables programming, tracing, and secure debug authentication
VBAT	Backup domain supply	Supplies RTC, 32×32-bit backup registers, and 2 KB backup SRAM during main power loss

Key Features

Feature	Design Value
LPBAM (Low-Power Background Autonomous Mode)	Enables DMA-driven peripheral chains (e.g., ADC→DMA→memory) without CPU wake-up - reduces active time by >90% in sensor logging
FlexPowerControl with SMPS	Integrated switch-mode power supply allows dynamic voltage scaling between 0.9 V and 1.2 V core - cuts dynamic power by up to 40% vs. LDO-only operation
TrustZone® + GTZC	Global TrustZone Controller enforces memory/peripheral access rights at hardware level - eliminates software-only security vulnerabilities in firmware updates
Dual ADC Architecture	14-bit ADC (2.5 Msps) and 12-bit ADC (2.5 Msps, Stop 2 capable) - supports simultaneous high-resolution and ultra-low-power sampling
Hardware Math Accelerators	CORDIC (trigonometric), FMAC (filtering), and HASH (SHA-256) - offloads 70–80% of compute load from CPU in motor control and TLS handshake
Secure Firmware Upgrade	TF-M compliant secure boot and update flow - enables field-deployable, cryptographically signed OTA patches with rollback protection

Applications

Smart Utility Meter

Industrial Wireless Sensor Node

Use Scenario: Battery-powered electricity/water/gas meter collecting consumption data hourly and transmitting via NB-IoT or LoRaWAN.

IC Role / Device Role / Timing Role: Main system controller managing metrology ADC sampling, secure data encryption, RTC-based scheduling, and low-power radio interface timing.

Use Value: 90 nA Shutdown and LPBAM reduce average current to <1 µA - enabling 10+ year battery life without compromising secure firmware updates.

Use Scenario: Self-powered vibration/temperature/humidity node deployed in factory machinery for predictive maintenance.

IC Role / Device Role / Timing Role: Real-time sensor fusion hub performing edge FFT analysis using CORDIC/FMAC, triggering alerts via CAN FD or UART to gateway.

Use Value: Dual ADCs sample analog sensors autonomously in Stop 2 mode; TrustZone isolates sensor data from untrusted firmware modules.

Secure Medical Wearable

Automotive Body Control Module (BCM) Subsystem

Use Scenario: ECG/PPG patch continuously monitoring biometrics and storing encrypted health logs locally before BLE transmission.

IC Role / Device Role / Timing Role: Secure data acquisition engine with analog front-end (OPAMP, COMP, ADC), cryptographic acceleration (HASH, RNG), and tamper-aware backup SRAM.

Use Value: 64 KB ECC SRAM protects sensitive health data; HDP and RDP prevent unauthorized debug access or firmware extraction.

Use Scenario: Low-power door module controlling window lift, mirror adjustment, and interior lighting in 12 V automotive systems.

IC Role / Device Role / Timing Role: Power-managed subsystem controller interfacing with LIN bus, driving motor drivers via advanced timers, and monitoring battery voltage (VBAT).

Use Value: SMPS efficiency and 3.0 µA Stop 2 mode extend sleep current budget; CAN FD enables diagnostics and firmware updates over vehicle network.

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), additional Octo-SPI and crypto accelerators; same LQFP48 package	Targeted at complex edge AI inference or multi-protocol gateways requiring larger code footprint	Select when >512 KB flash or hardware AES-GCM is required - not drop-in due to different peripheral mapping and clock tree
NXP KW38Z168VHT4	ARM Cortex-M0+ core, no TrustZone, lower performance (48 MHz), integrated BLE 5.0 radio, 512 KB flash, 128 KB SRAM	Optimized for Bluetooth LE end-node applications where RF integration outweighs security depth	Choose only if BLE stack offload and antenna matching simplify design - lacks LPBAM, SMPS, and TrustZone-grade isolation

Compared with STM32U535RCT6Q, the STM32U575RIT6Q offers greater memory headroom and enhanced crypto capability but requires board redesign for peripheral routing; the KW38Z168VHT4 trades security depth and ultra-low-power flexibility for integrated wireless, making it unsuitable for PSA-certifiable deployments.

Availability

STM32U535RCT6Q is available at Aetrix Electronics and suitable for smart utility meters, industrial wireless sensor nodes, secure medical wearables, and automotive body control subsystems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STM32U535RCT6Q 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 consumer markets since 1987.

The STM32U5 series is ST's flagship ultra-low-power secure MCU line, designed specifically for battery-operated IoT endpoints demanding PSA Certified Level 3 security, sub-µA power states, and hardware-accelerated cryptography without sacrificing real-time responsiveness.

FAQ

What is the maximum operating temperature range for STM32U535RCT6Q?

The STM32U535RCT6Q is rated for industrial operation from –40 °C to +85 °C. Its thermal design supports reliable performance under continuous 160 MHz operation within this range, with validated junction temperature limits confirmed in Section 5.3.1 of DS14217 Rev 5. No derating is required up to 85 °C ambient when using recommended PCB copper pour and thermal vias.

Does STM32U535RCT6Q support hardware-based secure boot?

Yes - it implements a hardware-rooted secure boot chain starting from immutable ROM code, verified boot images in flash using SHA-256/HASH accelerator, and protected execution in Secure World via TrustZone. Boot authenticity is enforced before any user code executes, with RDP and password-protected debug preventing unauthorized access.

Can the internal SMPS be used alongside the LDO simultaneously?

No - the SMPS and LDO are mutually exclusive power regulators. The device uses either SMPS (for highest efficiency below 100 MHz) or LDO (for lowest noise and fastest wake-up) selected via PWR_CR3 register. Switching between them is supported on-the-fly with controlled voltage scaling sequences defined in RM0453.

How many pins support independent V_DDIO2 supply for mixed-voltage I/O interfacing?

Fourteen I/O pins (PA0–PA13) support independent V_DDIO2 supply down to 1.08 V, enabling direct interfacing with 1.2 V, 1.8 V, or 2.5 V peripherals while maintaining 3.3 V core logic. This is implemented via dedicated V_DDIO2 pin and SYSCFG_IOCTRL register configuration - detailed in Section 4.2 of DS14217.

STM32U535RCT6Q Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 64-LQFP

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:: 256KB (256K 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:

STM32U535RCT6Q FAQ

1.How can I place an order for STM32U535RCT6Q through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32U535RCT6Q 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 STM32U535RCT6Q reliable?

The price and inventory of STM32U535RCT6Q are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32U535RCT6Q is usually 5 days.

3.What payment methods are accepted for STM32U535RCT6Q?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32U535RCT6Q transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32U535RCT6Q?

STM32U535RCT6Q orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32U535RCT6Q 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 STM32U535RCT6Q?

For technical support, including STM32U535RCT6Q datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32U535RCT6Q requirements.

6.How does Aetrix verify that STM32U535RCT6Q is sourced from the original manufacturer or authorized distributors?

All STM32U535RCT6Q 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 STM32U535RCT6Q meets industry standards.

7.What is the process for return or replacement of STM32U535RCT6Q?

All STM32U535RCT6Q units undergo pre-shipment inspection (PSI). If there is an issue with STM32U535RCT6Q, 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 STM32U535RCT6Q part is unused and in its original packaging.

Return procedure for STM32U535RCT6Q:

1.Submit a request within 90 days.

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

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