STMicroelectronics STM32H523CCU6

Overview

STM32H523CCU6 from STMicroelectronics is a 32-bit Arm® Cortex®-M33 microcontroller with TrustZone® security, FPU, and 250 MHz max clock frequency. It integrates 512 Kbytes of ECC-protected flash (dual-bank read-while-write), 272 Kbytes of SRAM (80 Kbytes with ECC), and supports secure firmware installation (SFI) and PSA Level 3 certification. It targets secure industrial control, IoT edge nodes, and smart metering where real-time performance, cryptographic acceleration, and tamper-resistant boot are required.

For engineers reviewing the STM32H523CCU6 datasheet, STM32H523CCU6 pinout, STM32H523CCU6 application, or STM32H523CCU6 equivalent, key selection considerations include TrustZone-aware peripheral configuration, dual-bank flash update capability, 12-bit ADC sampling at 5 Msps, Octo-SPI interface for serial PSRAM/NOR, and UFBGA48 package compatibility with high-density PCB layouts.

Technical Context

The STM32H523CCU6 implements Armv8-M mainline security with configurable SAU regions and TrustZone-aware peripherals including GPDMA, FDCAN, USB Type-C®/PD controller (UCPD), and HASH/PKA accelerators. Its ART Accelerator includes 8-Kbyte instruction cache and 4-Kbyte data cache to enable zero-wait-state execution from flash and external memories.

It features two dual-port DMA controllers, two FDCAN interfaces compliant with ISO 11898-1:2015, and a flexible memory controller supporting SRAM, PSRAM, FRAM, and NOR/NAND - all accessible under TrustZone-secured memory mapping with privilege enforcement.

Key Specifications

Pinout & Package

STM32H523CCU6 uses a 48-ball UFBGA package (5 × 5 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignment follows ST's standardized ballout for H5-series MCUs in this footprint, optimized for signal integrity and thermal dissipation in space-constrained industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H523CCU6, the STM32H563VIT6 offers greater memory and interface scalability at the cost of size and power, while the STM32L562RET6 trades performance and advanced peripherals for sub-μA sleep current - making the H523CCU6 optimal for compact, feature-rich, mains-powered secure edge nodes.

Availability

STM32H523CCU6 is available at Aetrix Electronics and suitable for industrial PLC edge nodes, secure smart meters, IoT gateway modules, and USB-C PD subsystems requiring stable component supply across multi-year production cycles.

Supply support for STM32H523CCU6 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 products for industrial, automotive, and consumer markets.

The STM32H5 series is ST's flagship secure MCU line built on Arm Cortex-M33 with TrustZone, targeting applications demanding PSA-certified security, real-time determinism, and scalable connectivity - especially where firmware integrity and hardware-rooted trust are non-negotiable.

FAQ

What is the maximum operating frequency and associated DMIPS rating?

The STM32H523CCU6 operates at up to 250 MHz with an integer Dhrystone 2.1 score of 375 DMIPS. This performance is sustained across its full voltage range (1.71–3.6 V) and ambient temperature range (–40°C to +105°C), validated per DS14540 Rev 3 Section 5.3.1. The ART Accelerator's 8-Kbyte instruction cache ensures zero-wait-state execution from embedded flash at this frequency.

Does STM32H523CCU6 support secure boot with hardware root of trust?

Yes. It implements a hardware root of trust via unique 96-bit device ID, secure hide protection area (HDP), and immutable boot entry. Secure Firmware Installation (SFI) enforces authenticated firmware loading, and PSA Level 3/SESIP3 certification confirms robustness against physical and logical attacks per defined assurance targets.

Which package variant does STM32H523CCU6 use, and what are its key mechanical attributes?

STM32H523CCU6 uses the UFBGA48 package (5 × 5 mm body, 0.5 mm ball pitch, 48-ball layout). It features an exposed thermal pad for enhanced heat dissipation and complies with ECOPACK2 RoHS/REACH requirements. Ballout matches ST's standardized H5-series pin mapping for UFBGA48, enabling drop-in layout reuse across compatible variants.

Can the internal ADC achieve 5 Msps continuously, and under what conditions?

Yes - both 12-bit ADCs support up to 5 Msps in interleaved mode with single-ended inputs and no oversampling. This requires VDDA ≥ 2.7 V, ADC clock derived from APB2 (max 72 MHz), and use of DMA for continuous data streaming. Performance is specified in DS14540 Rev 3 Section 5.3.22, Table 25, with typical SNR of 70.5 dB at 5 Msps.