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

STMicroelectronics STM32U585AII6

Name: STM32U585AII6
Brand: STMicroelectronics
SKU: STM32U585AII6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32U585AII6

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 169-UFBGA

Datasheet:: STM32U585AII6.pdf

Description:: IC MCU 32BIT 2MB FLASH 169UFBGA

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Product details

Overview

STM32U585AII6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 32-bit microcontroller with TrustZone® security, 240 DMIPS performance, 2 MB Flash (ECC), 786 KB SRAM, and integrated crypto accelerators (AES, PKA, HASH, RNG). It operates from 1.71–3.6 V across –40 °C to +125 °C and delivers 19.5 µA/MHz in Run mode - designed for secure, battery-constrained IoT edge nodes requiring real-time sensing, encrypted telemetry, and long-life operation.

For engineers reviewing the STM32U585AII6 datasheet, STM32U585AII6 pinout, STM32U585AII6 application, or STM32U585AII6 equivalent, key selection considerations include its dual-bank read-while-write Flash, LPBAM autonomous peripheral mode down to Stop 2, VBAT-powered RTC + 2 KB backup SRAM, and PSA Level 3/SESIP3-certified security architecture.

Technical Context

The device integrates an Arm Cortex-M33 core with TrustZone-enabled memory isolation, MPU, FPU, and DSP extensions, coupled with ART Accelerator (8 KB I-cache, 4 KB D-cache) enabling zero-wait-state execution at up to 160 MHz. Its power architecture combines embedded LDO and SMPS step-down converter with dynamic voltage scaling and on-the-fly switching.

Security is implemented via hardware root of trust, secure boot with HDP protection, SFI support, and tamper-aware life-cycle management. Peripheral security includes securable I/Os, TrustZone-classified peripherals (GTZC), and isolated memory regions for secure firmware and data storage.

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 cryptographic offload.
Max Clock / Performance	160 MHz / 240 DMIPS - supports high-throughput sensor fusion and protocol stacks without external co-processors.
Flash Memory	2 MB with ECC, dual-bank RWW - allows safe over-the-air firmware updates with zero downtime and field-programmable reliability.
SRAM	786 KB total (722 KB with ECC ON) - sufficient for large buffers, TLS handshakes, and multi-threaded RTOS workloads in secure context.
Low-Power Modes	160 nA Shutdown, 530 nA Standby with RTC - extends battery life in always-on monitoring applications beyond 10 years on coin cell.
Crypto Acceleration	Dual AES coprocessors (one DPA-resistant), PKA, HASH, TRNG (NIST SP800-90B compliant) - meets PSA Level 3 and SESIP3 certification requirements for secure boot and data-at-rest encryption.
ADC/DAC	14-bit ADC @ 2.5 Msps (hardware oversampling), dual 12-bit DACs - supports precision analog signal acquisition and control in industrial sensing and medical wearables.
Communication Peripherals	1 CAN FD, 6 USARTs (incl. LIN/IrDA), 4 I²C, 2 SAI, USB Type-C PD controller, OTG FS - enables robust wired connectivity for industrial gateways and smart energy devices.

Pinout & Package

STM32U585AII6 is packaged in UFQFPN48 (7 × 7 mm, 0.5 mm pitch), a space-constrained, thermally efficient package suitable for compact PCB layouts in portable and embedded systems. Pin functions are validated per STMicroelectronics DS13086 Rev 10, Section 4.2.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Core power supply and ground	Supports 1.71–3.6 V operation; decoupling required per layout guidelines for stable low-noise MCU operation.
VDDA, VSSA	Analog domain supply and ground	Independent analog rail enables precise ADC/DAC conversion unaffected by digital switching noise.
VBAT	Backup power input	Supplies RTC, 32 × 32-bit backup registers, and 2 KB backup SRAM during main power loss - critical for time-critical logging.
NRST	Active-low reset input	Asynchronous reset with internal pull-up; compatible with external reset supervisors and brown-out detection circuits.
PA0–PA15, PB0–PB15, etc.	General-purpose I/Os	Up to 136 fast I/Os; most 5V-tolerant, 14 with independent 1.08–3.6 V supply - supports mixed-voltage interfacing and flexible peripheral routing.
CLKIN/CLKOUT	External clock interface	Accepts 4–50 MHz crystal or external clock source for system timing; supports high-accuracy RTC and PLL synchronization.
BOOT0	Boot mode selection	Configures boot source (system memory, embedded Flash, or SRAM); essential for production programming and recovery sequences.

Key Features

Feature	Design Value
LPBAM (Low-Power Background Autonomous Mode)	Enables DMA-driven peripheral operation (ADC, UART, timers) in Stop 2 mode - eliminates CPU wake-ups for periodic sensing, reducing average current by >70%.
TrustZone + GTZC	Hardware-enforced isolation between secure/non-secure worlds, including securable memories, peripherals, and I/Os - foundational for PSA-certified firmware and secure OTA updates.
OCTOSPI + OTFDEC	On-the-fly decryption of external Octo-SPI memories using AES-256 - allows secure code execution directly from encrypted external Flash without exposing plaintext in RAM.
Chrom-ART Accelerator (DMA2D)	Hardware-accelerated 2D graphics rendering (copy, blend, format conversion) - reduces CPU load in HMI applications with color displays and touch interfaces.
CORDIC + FMAC	Hardware trigonometric (sin/cos/tan) and filter math acceleration - enables real-time motor control, FFT-based vibration analysis, and sensor fusion without floating-point overhead.
Secure Firmware Installation (SFI)	Root-secured service for authenticated, integrity-checked firmware loading - prevents unauthorized code injection during manufacturing or field deployment.

Applications

Smart Utility Metering

Industrial Predictive Maintenance Sensor

Use Scenario: Battery-powered gas/water meter with ultrasonic flow sensing, encrypted data transmission, and 15-year lifespan.

IC Role / Device Role / Timing Role: Main controller executing metrology algorithms, managing secure LoRaWAN/NB-IoT telemetry, and maintaining accurate time via VBAT-backed RTC.

Use Value: 160 nA Shutdown current and LPBAM enable multi-year operation on primary cells; PSA Level 3 certification satisfies utility-grade security mandates.

Use Scenario: Vibration/temperature/acoustic sensor node mounted on rotating machinery in hazardous environments.

IC Role / Device Role / Timing Role: Real-time edge processor acquiring synchronized multi-channel analog data, performing FFT via CORDIC/FMAC, and triggering alerts via CAN FD.

Use Value: 14-bit ADC with hardware oversampling and autonomous Stop 2 operation ensure high-fidelity capture without CPU intervention; -40 °C to +125 °C rating ensures reliability in harsh enclosures.

Medical Wearable Monitor

Secure Smart Home Hub

Use Scenario: ECG/PPG patch continuously monitoring vital signs with Bluetooth LE telemetry and local anomaly detection.

IC Role / Device Role / Timing Role: Secure host MCU managing analog front-end (OPAMP, COMP), cryptographic signing of health data, and low-latency BLE stack.

Use Value: Dual 12-bit DACs drive precision analog stimulation; TRNG + AES coprocessor enable HIPAA-compliant data encryption; 19.5 µA/MHz minimizes thermal load on skin-contact devices.

Use Scenario: Local gateway aggregating Zigbee, Matter-over-Thread, and BLE devices while enforcing end-to-end encryption and local policy enforcement.

IC Role / Device Role / Timing Role: Trusted execution environment (TEE) host running TF-M, managing secure key storage (HUK), and orchestrating secure firmware updates for connected peripherals.

Use Value: Hardware root of trust, OTP, and securable I/Os prevent physical tampering; UCPD controller enables USB-C power negotiation and secure debug lockdown.

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
STM32L562VEJ6	Same Cortex-M33 core, but only 512 KB Flash, no OCTOSPI, no UCPD, lower crypto suite (no PKA, single AES), 125 °C max temp.	Lacks external encrypted memory support and USB-C PD control - unsuitable for secure gateways or high-density firmware deployments.	Select when cost-sensitive, lower-feature secure edge node is acceptable and external Flash expansion is unnecessary.
NXP LPC55S69JBD100	Arm Cortex-M33 with TrustZone, 640 KB Flash, 320 KB SRAM, no SMPS, higher active current (28 µA/MHz), no PSA Level 3 certification.	Missing ULPMark-PP/CP benchmarks and certified security assurance - requires additional validation for regulated IoT deployments.	Prefer where NXP ecosystem tooling or specific peripheral sets (e.g., FlexSPI, CASPER crypto) align better with existing design infrastructure.

Compared with STM32L562VEJ6 and LPC55S69JBD100, the STM32U585AII6 uniquely combines PSA Level 3 certification, 2 MB RWW Flash, OCTOSPI+OTFDEC, and sub-µA standby with RTC - making it the only choice for certified, field-upgradable, long-life secure edge controllers demanding both performance and compliance.

Availability

STM32U585AII6 is available at Aetrix Electronics and suitable for smart metering, predictive maintenance sensors, medical wearables, and secure home hubs requiring stable component supply, long-term lifecycle assurance, and certified security features.

Supply support for STM32U585AII6 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 innovation in embedded systems.

The STM32U5 series is ST's flagship ultra-low-power, secure MCU product line targeting certified IoT edge devices, emphasizing energy efficiency, hardware-enforced security, and seamless integration with Azure Sphere and AWS IoT Greengrass.

FAQ

What is the maximum operating temperature for STM32U585AII6?

The STM32U585AII6 is qualified for operation from –40 °C to +125 °C ambient temperature, as specified in DS13086 Rev 10 Section 5.3.1. This extended range supports deployment in industrial enclosures, automotive under-hood modules, and outdoor utility infrastructure without derating.

Does STM32U585AII6 support external memory encryption?

Yes - it includes an On-the-Fly Decryption Engine (OTFDEC) that performs real-time AES-256 decryption of Octo-SPI external memories. This enables secure code execution directly from encrypted NOR/FRAM without exposing plaintext in internal SRAM, satisfying PSA Level 3 requirements.

How many wake-up pins does STM32U585AII6 support in Standby mode?

The device supports 24 dedicated wake-up pins in Standby mode, as confirmed in DS13086 Rev 10 Section 3.9.3. These pins retain interrupt capability even with the core powered down, enabling responsive event-driven operation while consuming only 210 nA (or 530 nA with RTC enabled).

Is the STM32U585AII6 pin-compatible with other STM32U5 variants?

No - the "AII6" suffix denotes the UFQFPN48 package. While electrical functionality is consistent across the U585xx family, pinouts differ significantly between packages (e.g., LQFP48, WLCSP90, UFBGA132). Designers must use the specific pin mapping for UFQFPN48 from DS13086 Section 4.1 to ensure correct layout and signal routing.

STM32U585AII6 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 169-UFBGA

Series:: STM32U5

Packaging:: Bulk

Product Status:: Active

Programmable:: -

Core Processor:: ARM® Cortex®-M33

Core Size:: 32-Bit

Speed:: 160MHz

Connectivity:: CANbus, I2C, IrDA, LINbus, MMC/SD/SDIO, SAI, SmartCard, SPDIF, SPI, UART/USART, USB, USB OTG

Peripherals:: Brown-out Detect/Reset, DMA, LCD, Motor Control PWM, POR, PWM, WDT

Number of I/O:: 136

Program Memory Size:: 2MB (2M x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 784K x 8

Voltage - Supply (Vcc/Vdd):: 1.71V ~ 3.6V

Data Converters:: A/D 24x12/14b SAR; D/A 2x12b

Oscillator Type:: External, Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32U585AII6 FAQ

1.How can I place an order for STM32U585AII6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32U585AII6 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 STM32U585AII6 reliable?

The price and inventory of STM32U585AII6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32U585AII6 is usually 5 days.

3.What payment methods are accepted for STM32U585AII6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32U585AII6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32U585AII6?

STM32U585AII6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32U585AII6 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 STM32U585AII6?

For technical support, including STM32U585AII6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32U585AII6 requirements.

6.How does Aetrix verify that STM32U585AII6 is sourced from the original manufacturer or authorized distributors?

All STM32U585AII6 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 STM32U585AII6 meets industry standards.

7.What is the process for return or replacement of STM32U585AII6?

All STM32U585AII6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32U585AII6, 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 STM32U585AII6 part is unused and in its original packaging.

Return procedure for STM32U585AII6:

1.Submit a request within 90 days.

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

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