STMicroelectronics STM32H573IIT6

Overview

STM32H573IIT6 from STMicroelectronics is a high-performance, secure Arm® Cortex®-M33 32-bit microcontroller with TrustZone®, FPU, and 250 MHz operation delivering 375 DMIPS. It integrates 2-Mbyte ECC-protected flash (dual-bank read-while-write), 640-Kbyte SRAM (including ECC-enabled SRAM2/SRAM3), and hardware cryptographic accelerators (AES, PKA, HASH, OTFDEC). It targets secure industrial control, IoT edge nodes, and trusted firmware execution environments requiring PSA Level 3 and SESIP3 certification.

For engineers reviewing the STM32H573IIT6 datasheet, STM32H573IIT6 pinout, STM32H573IIT6 application, or STM32H573IIT6 equivalent, key selection considerations include TrustZone-enforced peripheral isolation, dual-bank flash for robust OTA updates, on-the-fly Octo-SPI decryption, 1.71–3.6 V supply range with SMPS support, and 140 fast 5 V-tolerant GPIOs with independent low-voltage I/O capability.

Technical Context

The STM32H573IIT6 implements Armv8-M mainline security with configurable SAU regions and preconfigured immutable root of trust (ST-iROT), enabling hardware-enforced secure boot and runtime isolation. Its dual-core-aware GPDMA controllers offload CPU-intensive data movement across peripherals including FMC, Octo-SPI, SDMMC, and Ethernet MAC.

It features ART Accelerator with 8-Kbyte instruction cache and 4-Kbyte data cache for zero-wait-state execution from flash and external memories, plus CORDIC and FMAC coprocessors for real-time trigonometric and filtering computations - critical for motor control and sensor fusion applications.

Key Specifications

Pinout & Package

LQFP176 package (24 × 24 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant ECOPACK2; operating ambient temperature range: –40 °C to +105 °C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar secure MCU applications.

Compared with STM32U575ZIT6, the STM32H573IIT6 delivers higher compute density (375 vs. 230 DMIPS), mandatory dual-bank RWW for fail-safe OTA, and full PSA Level 3 assurance; versus i.MX RT1176, it offers smaller footprint, lower BOM cost, and certified security architecture - ideal for resource-constrained certified endpoints.

Availability

STM32H573IIT6 is available at Aetrix Electronics and suitable for industrial PLCs, secure IoT gateways, medical diagnostic equipment, and smart energy meters requiring stable component supply, long-term lifecycle support, and certified security functionality.

Supply support for STM32H573IIT6 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 STM32H5 series is ST's flagship secure MCU line targeting PSA Certified Level 3 and SESIP3 assurance for high-trust embedded applications in industrial, healthcare, and infrastructure markets.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32H573IIT6 operates at up to 250 MHz and achieves 375 DMIPS (Dhrystone 2.1) with its Arm Cortex-M33 core. This performance is sustained under real-world conditions thanks to the 8-Kbyte instruction cache (ART Accelerator), which enables zero-wait-state execution from embedded flash. The core also delivers 1023 CoreMark® (4.092 CoreMark®/MHz), confirming deterministic throughput for real-time applications.

Does the device support secure boot from external memory?

Yes - the STM32H573IIT6 supports secure boot from external Octo-SPI memory via its on-the-fly decryption engine (OTFDEC), which decrypts AES-128/256-encrypted code in real time during fetch. Combined with immutable root of trust (ST-iROT) and secure firmware installation (SFI), this enables cryptographically verified execution directly from external flash without exposing plaintext firmware.

How many GPIOs are 5 V-tolerant and what is their low-voltage capability?

Up to 140 GPIOs are 5 V-tolerant, allowing direct interface with legacy 5 V peripherals without level shifters. Additionally, ten I/Os support independent supply down to 1.08 V (VDDIO2 rail), enabling native interfacing with ultra-low-voltage sensors, displays, or RF modules while maintaining full functionality and interrupt capability.

What packaging and thermal specifications apply to the STM32H573IIT6?

The STM32H573IIT6 is offered in LQFP176 (24 × 24 mm, 0.5 mm pitch) with an exposed thermal pad. Its specified ambient operating temperature range is –40 °C to +105 °C. Thermal resistance θ_JA is 24.5 °C/W (JEDEC JESD51-7), and θ_JC is 5.5 °C/W, supporting reliable operation in thermally constrained industrial enclosures without forced airflow.