STMicroelectronics STM32U5A5ZIT6Q

Overview

STM32U5A5ZIT6Q from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 32-bit microcontroller with TrustZone® security, 4 MB Flash, 2.5 MB SRAM, MIPI® DSI host controller, LTDC, and hardware crypto accelerators. It operates from 1.71 V to 3.6 V across –40 °C to +125 °C, delivers 240 DMIPS at 160 MHz, and supports autonomous low-power background mode (LPBAM) down to Stop 2. It targets secure, graphics-rich IoT edge nodes and industrial HMIs requiring real-time responsiveness and extended battery life.

For engineers reviewing the STM32U5A5ZIT6Q datasheet, STM32U5A5ZIT6Q pinout, STM32U5A5ZIT6Q application, or STM32U5A5ZIT6Q equivalent, key selection criteria include TrustZone-enabled secure boot, dual 14-bit ADCs with Stop 2 autonomy, Neo-Chrom GPU2D acceleration, on-the-fly Octo-SPI decryption, and 156 5V-tolerant I/Os with independent supply options down to 1.08 V.

Technical Context

The device integrates a dual-cache Arm Cortex-M33 core (32 KB ICACHE + 16 KB DCACHE1) with TrustZone for memory/peripheral isolation, MPU, DSP extensions, and FPU-enabling deterministic real-time execution and secure firmware partitioning. Its FlexPowerControl architecture enables LPBAM operation where peripherals (ADC, DAC, timers, UART) remain active in Stop 2 mode using DMA without CPU intervention.

Security is implemented via SESIP3/PSA Level 3 certification, embedded root of trust, secure hide-protection area (HDP), hardware unique key (HUK), and two AES coprocessors-one DPA-resistant-plus PKA, HASH, RNG (NIST SP800-90B compliant), and OTFDEC for external memory encryption.

Key Specifications

Pinout & Package

LQFP144 (20 × 20 mm, 0.5 mm pitch) package with 156 I/Os (144 usable pins + power/ground). Pin functions include dual VDDIO2 supplies (1.08–3.6 V), dedicated VBAT, multiple clock inputs (HSE/LSE), TrustZone-secured debug (SWJ-DP), and peripheral-dedicated pins for MIPI DSI, LTDC, OCTOSPI, and SDMMC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32U5A5ZIT6Q, STM32U575ZIT6Q trades display interfaces for enhanced USB-C PD and crypto, while RA6M5GFP offers lower memory and no graphics acceleration-making both less suitable for high-fidelity, battery-operated HMIs requiring MIPI DSI and GPU2D.

Availability

STM32U5A5ZIT6Q is available at Aetrix Electronics and suitable for smart energy meters, secure industrial gateways, portable medical diagnostics, and automotive cabin controllers requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for STM32U5A5ZIT6Q 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 analog devices for industrial, automotive, and consumer markets.

The STM32U5 series is ST's flagship ultra-low-power MCU line built on the Arm Cortex-M33 core, targeting secure, graphics-capable edge devices with stringent energy budgets and safety certifications.

FAQ

What is the maximum operating temperature for STM32U5A5ZIT6Q?

The STM32U5A5ZIT6Q is rated for operation from –40 °C to +125 °C (ambient temperature), qualified per AEC-Q100 Grade 1 for automotive use and validated for industrial extended temperature applications. This rating applies to the LQFP144 package variant and assumes proper PCB thermal design per ST's AN5247 layout guidelines.

Does STM32U5A5ZIT6Q support secure boot with hardware root of trust?

Yes. The device implements a hardware root of trust via unique boot entry, secure hide-protection area (HDP), and embedded root secure services (RSS). It supports Secure Firmware Installation (SFI) and is certified to PSA Level 3 and SESIP3, enabling immutable secure boot chain verification and runtime attestation.

Can the Neo-Chrom GPU2D render vector graphics without CPU involvement?

No. Neo-Chrom GPU2D accelerates raster operations (rotation, scaling, texture mapping) but requires CPU setup of command lists and memory buffers. It does not execute vector path rendering natively; however, it significantly reduces CPU load for bitmap-based UI composition and animation playback.

How many wake-up pins are available in Shutdown mode?

The STM32U5A5ZIT6Q supports 24 dedicated wake-up pins in Shutdown mode, all capable of generating interrupts from deep sleep. These include all GPIOs configured as EXTI lines, plus dedicated pins like RTC_ALARM and TAMPER events-enabling flexible low-power system wake-up strategies.