STMicroelectronics STM32U585CIT6

Overview

STM32U585CIT6 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 +85 °C and delivers 4.3 µA Stop 3 mode with full SRAM-enabling battery-powered IoT sensor nodes with secure firmware updates via TF-M.

For engineers reviewing the STM32U585CIT6 datasheet, STM32U585CIT6 pinout, STM32U585CIT6 application, or STM32U585CIT6 equivalent, key selection criteria include TrustZone-enabled peripheral isolation, LPBAM autonomous peripheral operation in Stop 2 mode, on-the-fly Octo-SPI decryption, ULPMark™-CP score of 450, and dual 14-/12-bit ADCs with hardware oversampling.

Technical Context

The STM32U585CIT6 implements a dual-bank Arm Cortex-M33 core with MPU, FPU, and TrustZone® for hardware-enforced secure/non-secure world separation. Its FlexPowerControl architecture enables low-power background autonomous mode (LPBAM) using DMA-driven peripherals down to Stop 2, with 16-Kbyte SRAM retention at 4.0 µA.

Security is anchored by SESIP3/PSA Level 3 certification, root-of-trust boot entry, secure hide protection area (HDP), and embedded root secure services (RSS) for secure firmware installation. Clocking includes three PLLs, autotrimmed 100 kHz–48 MHz oscillators, and 48 MHz clock recovery for USB.

Key Specifications

Pinout & Package

STM32U585CIT6 is housed in a 48-pin UFQFPN (7 × 7 mm) package with 0.5 mm pitch, optimized for space-constrained ultra-low-power applications. The package supports industrial temperature range (–40 °C to +85 °C) and features exposed thermal pad for enhanced thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power secure MCU applications.

Compared with STM32L562VEJ6, the STM32U585CIT6 adds OTFDEC, PSA Level 3, and LPBAM for autonomous sensing-critical for encrypted remote metering. Versus LPC55S69JBD100, it delivers 41% higher ULPMark™-CP and hardware-enforced peripheral security, making it superior for regulated industrial edge deployments.

Availability

STM32U585CIT6 is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial predictive maintenance nodes, and secure building automation gateways requiring stable component supply across multi-year production cycles.

Supply support for STM32U585CIT6 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 ICs, sensors, and automotive semiconductors since 1987.

The STM32U5 series targets ultra-low-power, high-security embedded applications-including battery-powered IoT endpoints and industrial edge nodes-by integrating TrustZone, advanced power gating, and hardware-accelerated cryptography into a single die.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating?

The STM32U585CIT6 runs at up to 160 MHz with an ART Accelerator enabling zero-wait-state execution. It achieves 240 DMIPS (Dhrystone 2.1) and 651 CoreMark® (4.07 CoreMark®/MHz), validated under full SRAM and Flash ECC enabled conditions per DS13086 Rev 10 Section 2.2.

Does STM32U585CIT6 support hardware-based secure boot and firmware update?

Yes. It implements secure boot via unique boot entry and secure hide protection area (HDP), and supports secure firmware upgrades using TF-M (Trusted Firmware-M). Embedded Root Secure Services (RSS) enable Secure Firmware Installation (SFI) with signature verification and rollback protection.

Which low-power modes retain SRAM content and support wake-up from external interrupts?

Stop 2, Stop 3, and Standby modes retain configurable SRAM blocks (up to full 786 KB in Stop 3 at 4.3 µA). All three support wake-up via any of 24 dedicated wake-up pins, RTC alarm, or external interrupt lines-verified in DS13086 Rev 10 Table 12 and Section 3.9.3.

Is the UFQFPN48 package of STM32U585CIT6 compatible with reflow soldering per J-STD-020?

Yes. The UFQFPN48 package (A0B9 variant) is qualified for standard Pb-free reflow per J-STD-020D, with peak temperature ≤260 °C and time above liquidus ≤60 seconds. Thermal pad soldering requires controlled stencil design and void minimization per ST Application Note AN5056.