STMicroelectronics STM32U585RIT6

Overview

STM32U585RIT6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 32-bit MCU with TrustZone® and FPU, delivering 240 DMIPS at up to 160 MHz. It integrates 2 MB Flash (with ECC), 786 KB SRAM, hardware crypto accelerators (AES, PKA, HASH), and supports LPBAM autonomous peripheral operation down to Stop 2 mode. It targets secure, battery-powered IoT edge nodes requiring real-time sensing, encrypted telemetry, and long-term operation on coin-cell or energy-harvested power.

For engineers reviewing the STM32U585RIT6 datasheet, STM32U585RIT6 pinout, STM32U585RIT6 application, or STM32U585RIT6 equivalent, key selection criteria include its 160 nA Shutdown current, PSA Level 3/SESIP3 security certification, dual 14-/12-bit ADCs with Stop 2 autonomy, Octo-SPI on-the-fly decryption, and 48-pin UFQFPN package with 5V-tolerant I/Os.

Technical Context

The STM32U585RIT6 implements a dual-bank Arm Cortex-M33 core with TrustZone-enforced secure/non-secure world isolation, MPU, DSP extensions, and single-precision FPU. Its ART Accelerator includes 8 KB instruction cache and 4 KB data cache, enabling zero-wait-state execution from Flash and external memories.

Power architecture combines embedded LDO and SMPS step-down converter with dynamic voltage scaling and on-the-fly switching. Low-power modes are hierarchically structured: Shutdown (160 nA), Standby (210 nA), Stop 2 (4.0 µA with 16 KB SRAM), and Stop 3 (1.9 µA with 16 KB SRAM), all supporting autonomous DMA-driven peripheral operation via LPBAM.

Key Specifications

Pinout & Package

STM32U585RIT6 is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN) package measuring 7 × 7 mm with 0.5 mm pitch. The package supports soldering on standard PCBs and provides thermal performance suitable for extended industrial temperature operation (–40 °C to +125 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L562RET6 and RA4M3GDB001#AC0, the STM32U585RIT6 uniquely delivers PSA Level 3–certified TrustZone, on-the-fly external memory decryption, and sub-µA shutdown-enabling secure, long-life edge devices where firmware integrity, encrypted data-at-rest, and battery longevity are non-negotiable.

Availability

STM32U585RIT6 is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial wireless sensor nodes, and secure edge gateway controllers requiring stable component supply across multi-year production cycles.

Supply support for STM32U585RIT6 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.

The STM32U5 series is ST's flagship ultra-low-power secure MCU product line, engineered specifically for battery-constrained, safety-critical, and privacy-sensitive IoT endpoints demanding certified security, sub-microamp power, and rich analog/mixed-signal integration.

FAQ

What is the maximum operating temperature range for STM32U585RIT6?

The STM32U585RIT6 is qualified for industrial and extended temperature operation from –40 °C to +125 °C. This rating applies across all low-power modes and full-speed operation (160 MHz), validated per ST's production test flow and documented in Section 5.3.1 of DS13086 Rev 10. The UFQFPN48 package's thermal resistance (θ_JA = 40 °C/W) supports reliable operation under sustained ambient conditions within this range.

Does STM32U585RIT6 support hardware-based secure boot with anti-rollback?

Yes. STM32U585RIT6 implements a hardware-rooted secure boot sequence with anti-rollback protection via immutable one-time-programmable (OTP) registers storing monotonic counters and image version numbers. Boot validation occurs in the secure ROM loader before any user code executes, enforced by TrustZone and GTZC peripherals. This mechanism is integral to its PSA Level 3 certification and detailed in Sections 3.7 and 3.43.2 of the datasheet.

Can the 14-bit ADC operate while the CPU is in Stop 2 mode?

Yes. The 14-bit ADC1 can perform autonomous conversions in Stop 2 mode using LPBAM-triggered DMA transfers, with results stored directly to SRAM without CPU intervention. This capability is confirmed in Section 3.28.1 and Table 122 (ADC1 characteristics) of DS13086 Rev 10, where "Autonomous in Stop 2" is explicitly specified for ADC1 with hardware oversampling enabled.

What development tools are officially supported for STM32U585RIT6 firmware development?

ST officially supports STM32CubeIDE (v1.14+), STM32CubeMX (v6.12+), and STM32CubeU5 firmware package (v1.3.0+) for STM32U585RIT6. Debug is enabled via SWD using ST-LINK/V3 or J-Link Pro. Hardware evaluation is supported by the STM32U585I-EV evaluation board and STM32U585A-DK discovery kit, both including UCPD, Octo-SPI, and crypto acceleration demonstration examples.