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STMicroelectronics STM32U535RCI6

Name: STM32U535RCI6
Brand: STMicroelectronics
SKU: STM32U535RCI6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32U535RCI6

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 64-UFBGA

Datasheet:: STM32U535RCI6.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STM32U535RCI6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 microcontroller with TrustZone® security, 512 KB flash, 274 KB SRAM, and integrated FPU-designed for battery-powered IoT edge nodes requiring secure sensor fusion, BLE gateway co-processing, and real-time control under 4.6 µA Stop 2 mode.

For engineers reviewing the STM32U535RCI6 datasheet, STM32U535RCI6 pinout, STM32U535RCI6 application, or STM32U535RCI6 equivalent, this page delivers verified low-power mode current values, TrustZone-enforced memory partitioning, octo-SPI interface timing, CAN FD controller capability, and LQFP64 package pin mapping per DS14217 Rev 5.

Technical Context

The STM32U535RCI6 implements a dual-bank flash architecture with ECC and read-while-write support, enabling secure over-the-air firmware updates without runtime interruption. Its FlexPowerControl system integrates SMPS + LDO with on-the-fly voltage scaling to maintain 160 MHz operation across 1.71–3.6 V supply.

TrustZone® enforces hardware-isolated secure/non-secure worlds: peripherals like RNG, HASH, and securable GPIOs are configurable via GTZC, while boot integrity relies on unique ID, HDP, and RDP-level protection-enabling certified secure firmware installation (SFI) and TF-M-based upgrades.

Key Specifications

Parameter	Value and Actual Design Meaning
Core	Arm Cortex-M33 with TrustZone, FPU, MPU, and DSP extensions-enables concurrent secure RTOS and non-secure application tasks.
Max Clock / Performance	160 MHz / 240 DMIPS-achieved via 8-KB instruction cache and ART Accelerator for zero-wait-state flash execution.
Memory	512 KB flash (ECC, 2 banks, 100 kcycles), 274 KB SRAM (up to 64 KB with ECC)-supports robust data logging and encrypted firmware storage.
Low-Power Modes	90 nA Shutdown, 370 nA Standby+RTC, 4.6 µA Stop 2 full-SRAM-enables multi-year battery life in wireless sensor nodes.
Analog Peripherals	14-bit 2.5-Msps ADC (hardware oversampling), dual 12-bit DAC, OPAMP with PGA, ultra-low-power comparator-suitable for precision analog front-end design.
Connectivity	1x CAN FD, 1x USB FS (host/device), 4x I²C FM+, 5x USART/LPUART, 3x SPI, 1x SAI, SDMMC, OCTOSPI-supports industrial fieldbus bridging and audio edge processing.
Security	TrustZone isolation, 96-bit UID, 512-byte OTP, secure hide protection area (HDP), CORDIC/FMAC accelerators-meets PSA Level 3 and SESIP certification prerequisites.

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK2 finish; operates from –40 °C to +85 °C ambient.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA, VDDIO2	Main, analog, and I/O power supplies	Independent 1.71–3.6 V domains enable mixed-signal noise isolation and flexible rail sequencing.
VSS, VSSA, VSSIO2	Ground returns	Dedicated analog/digital ground pins minimize coupling in high-resolution ADC/DAC operation.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7	General-purpose I/Os	Up to 82 fast I/Os; most 5V-tolerant; 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; supports external reset supervisor integration per Section 5.3.16.
BOOT0	Boot mode selection	Configures boot source (system memory, flash, or SRAM) at power-on; level sampled during reset sequence.
SWCLK, SWDIO	Serial-wire debug interface	2-pin debug access supporting SWD protocol; compatible with ST-LINK v3 and J-Link probes.
OSC_IN, OSC_OUT	External crystal oscillator inputs	Supports 4–50 MHz crystals; enables precise clocking for USB, RTC, and communication peripherals.
VBAT	Backup power 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) active down to Stop 2 mode-eliminates CPU wake-ups for sensor polling.
FlexPowerControl with SMPS	Integrated step-down converter reduces system power by up to 30% vs. LDO-only operation; supports dynamic voltage scaling during runtime.
Octo-SPI Interface	Single 8-line interface replacing quad-SPI + parallel NOR/NAND-reduces PCB layer count and supports XIP from external flash up to 133 MHz.
CORDIC + FMAC Accelerators	Hardware trigonometric and filter math engines offload CPU for motor control, FFT, and sensor fusion-cutting latency by >90% vs. software implementation.
Secure Firmware Installation (SFI)	Root-secure services (RSS) validate and install signed firmware images using embedded public key infrastructure-prevents unauthorized code execution.

Applications

Smart Metering Node

Industrial Predictive Maintenance Sensor

Use Scenario: Battery-powered gas/water meter with ultrasonic flow sensing, tamper detection, and LoRaWAN backhaul.

IC Role / Device Role / Timing Role: Main MCU handling ADC sampling, RTC timestamping, cryptographic signing, and low-power radio scheduling.

Use Value: 90 nA Shutdown current extends 10-year battery life; TrustZone isolates metering firmware from OTA update stack.

Use Scenario: Vibration/temperature/acoustic sensor node mounted on rotating machinery with edge FFT analysis.

IC Role / Device Role / Timing Role: Real-time signal processor running CORDIC/FMAC-accelerated FFT and anomaly detection before sending alerts via CAN FD.

Use Value: 2.2 µA Stop 3 full-SRAM mode preserves context between bursts; 14-bit ADC oversampling achieves <1 LSB INL at 2.5 Msps.

Secure BLE Gateway

Medical Wearable Hub

Use Scenario: Hospital-grade BLE mesh gateway aggregating data from 32+ patient monitors with TLS 1.3 encryption.

IC Role / Device Role / Timing Role: Secure host managing BLE Link Layer, TLS handshake via HASH/RNG, and USB FS debug interface.

Use Value: Secure hide protection area (HDP) stores private keys; 137000 SecureMark™-TLS score validates crypto throughput.

Use Scenario: ECG/PPG wearable with capacitive touch UI, motion sensing, and medical-grade analog front-end.

IC Role / Device Role / Timing Role: Analog hub controlling OPAMP-PGA gain, TSC touch sensing, and 12-bit DAC-driven reference calibration.

Use Value: 20-channel TSC supports multi-touch gesture recognition; 12-bit DAC with sample-and-hold enables stable biasing of biopotential amplifiers.

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), added Ethernet MAC and JPEG codec; same LQFP64 package and pinout.	Targeted at HMI gateways and networked edge controllers-not optimized for sub-µA battery operation.	Select when needing Ethernet connectivity or >512 KB code space; avoid if minimizing BOM cost and leakage current is critical.
NXP KW38Z168VHT4	ARM Cortex-M0+ core, no TrustZone, 128 KB flash, BLE 5.0 radio integrated; QFN48 package.	Designed for Bluetooth SoC applications-lacks octo-SPI, CAN FD, and advanced analog peripherals.	Choose only for pure BLE endpoint designs where RF integration outweighs need for external memory expansion or industrial bus support.

Compared with STM32U575RIT6, the STM32U535RCI6 delivers superior ultra-low-power efficiency (90 nA vs. 300 nA shutdown) and lower system cost for sensor-fusion applications, while the KW38Z168VHT4 lacks TrustZone, CAN FD, and hardware math accelerators required for deterministic industrial control.

Availability

STM32U535RCI6 is available at Aetrix Electronics and suitable for smart metering nodes, predictive maintenance sensors, secure BLE gateways, and medical wearable hubs requiring stable component supply across extended product lifecycles.

Supply support for STM32U535RCI6 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, specializing in microcontrollers, power management, and automotive ICs-with over 40 years of embedded systems innovation.

The STM32U5 series targets ultra-low-power, secure IoT endpoints-combining Arm TrustZone, silicon-proven power gating, and hardware crypto accelerators to meet PSA Certified Level 3 and IEC 62443 requirements.

FAQ

What is the maximum operating temperature range for STM32U535RCI6?

The STM32U535RCI6 is rated for –40 °C to +85 °C ambient operation per DS14217 Rev 5 Section 5.3.1. This industrial temperature grade supports deployment in outdoor utility meters, factory-floor sensors, and automotive cabin modules without derating.

Does STM32U535RCI6 support external memory interfaces beyond OCTOSPI?

No-OCTOSPI is the sole high-speed external memory interface. It supports x1/x2/x4/x8 modes for serial NOR/NAND, HyperRAM, and PSRAM. Parallel memory interfaces (e.g., FSMC) are not implemented; external storage must use OCTOSPI, SDMMC, or USB.

How is TrustZone security configured at boot time?

TrustZone is enabled via the TZEN bit in the option bytes, programmed via ST-LINK or bootloader. When activated, the GTZC enforces secure/non-secure memory and peripheral attribution per SAU configuration-verified at every boot by the root-of-trust boot ROM using HDP and RDP settings.

Can the 14-bit ADC operate autonomously in Stop 2 mode?

No-the 14-bit ADC (ADC1) requires VDD voltage and is disabled in Stop 2. However, the 12-bit ADC4 remains functional in Stop 2 mode with autonomous hardware oversampling, delivering 12-bit results directly to memory via LPDMA without CPU intervention.

STM32U535RCI6 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:: 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 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:

STM32U535RCI6 FAQ

1.How can I place an order for STM32U535RCI6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32U535RCI6 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 STM32U535RCI6 reliable?

The price and inventory of STM32U535RCI6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32U535RCI6 is usually 5 days.

3.What payment methods are accepted for STM32U535RCI6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32U535RCI6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32U535RCI6?

STM32U535RCI6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32U535RCI6 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 STM32U535RCI6?

For technical support, including STM32U535RCI6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32U535RCI6 requirements.

6.How does Aetrix verify that STM32U535RCI6 is sourced from the original manufacturer or authorized distributors?

All STM32U535RCI6 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 STM32U535RCI6 meets industry standards.

7.What is the process for return or replacement of STM32U535RCI6?

All STM32U535RCI6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32U535RCI6, 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 STM32U535RCI6 part is unused and in its original packaging.

Return procedure for STM32U535RCI6:

1.Submit a request within 90 days.

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

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