STMicroelectronics STM32U575RGT3

Overview

STM32U575RGT3 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 32-bit microcontroller with TrustZone® security, FPU, and 240 DMIPS performance. It integrates 2 MB Flash (with ECC), 786 KB SRAM, and supports LPBAM autonomous peripheral operation down to Stop 2 mode. Designed for secure, battery-sensitive edge nodes, it delivers 4.3 µA Stop 3 mode with full SRAM retention and 19.5 µA/MHz Run mode at 3.3 V.

For engineers reviewing the STM32U575RGT3 datasheet, STM32U575RGT3 pinout, STM32U575RGT3 application, or STM32U575RGT3 equivalent, key selection criteria include TrustZone-enabled secure boot, dual 14-/12-bit ADCs with Stop 2 autonomy, integrated SMPS + LDO power management, and USB Type-C®/PD controller support for energy-constrained IoT endpoints.

Technical Context

The STM32U575RGT3 implements a dual-bank Flash architecture with read-while-write capability and hardware ECC, enabling secure over-the-air firmware updates without runtime interruption. Its TrustZone security enforces strict isolation between secure and non-secure worlds via configurable memory regions, securable peripherals (e.g., RNG, HASH, AES), and root-of-trust boot with HDP protection.

Power architecture combines embedded SMPS step-down converter (switch-on-the-fly) and LDO, supporting dynamic voltage scaling across operating modes. The low-power background autonomous mode (LPBAM) enables DMA-driven peripheral sequences-including ADC sampling, SPI transfers, and timer-triggered DAC output-without CPU intervention, even in Stop 2 (530 nA RTC-active standby).

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; 64-pin configuration supporting 5V-tolerant GPIOs (most), independent 1.08–3.6 V I/O supply options, and dedicated TrustZone-secured debug pins (SWD/JTAG).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L562RET6, the STM32U575RGT3 adds USB-C PD, SMPS, and larger memory for complex edge gateways; versus RA4M3, it trades raw DSP throughput for certified security primitives and 3× lower standby current with RTC retention.

Availability

STM32U575RGT3 is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial wireless sensor nodes, and secure access control terminals requiring stable component supply across multi-year production lifecycles.

Supply support for STM32U575RGT3 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.

The STM32U5 series targets ultra-low-power, security-critical edge devices - combining Arm TrustZone, advanced power gating, and hardware crypto accelerators for certified IoT endpoints and industrial controllers.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating?

The STM32U575RGT3 runs at up to 160 MHz using its ART Accelerator, achieving 240 DMIPS (1.5 DMIPS/MHz per Dhrystone 2.1). This performance is sustained with zero wait states thanks to the 8-KB instruction cache, even when executing from Flash or external memories.

How does the LPBAM (Low-Power Background Autonomous Mode) reduce system power consumption?

LPBAM enables peripherals-including ADC, timers, SPI, and DMA-to execute predefined data acquisition or transfer sequences autonomously in Stop 2 mode without waking the CPU. This eliminates CPU overhead and leakage during background tasks, cutting average power by up to 70% in sensor logging applications.

Which security features are hardware-enforced and cannot be disabled?

TrustZone memory isolation, secure boot with HDP-protected initial vector, 96-bit unique ID, and NIST SP800-90B–compliant TRNG are fixed hardware features. The RDP (Readout Protection) level and debug access permissions are fuse-configurable and irreversible once set to Level 2.

Does the STM32U575RGT3 support external memory interfaces, and what types are compatible?

Yes - it integrates a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, NAND, and FRAM, plus two Octo-SPI interfaces for high-speed serial flash and RAM. These allow expansion beyond on-chip memory for firmware overlays, data logging buffers, or graphical framestores.