STMicroelectronics STM32H743IIT6

Overview

STM32H743IIT6 from STMicroelectronics is a 32-bit Arm® Cortex®-M7 microcontroller operating at up to 480 MHz, featuring 2 MB flash, 1 MB RAM (including 192 KB TCM), dual-bank read-while-write capability, and integrated FPU with L1 cache. It integrates dual CAN FD controllers, Ethernet MAC, JPEG codec, LCD-TFT controller, and hardware-accelerated DMA2D for high-performance industrial HMI and real-time control applications.

For engineers reviewing the STM32H743IIT6 datasheet, STM32H743IIT6 pinout, STM32H743IIT6 application, or STM32H743IIT6 equivalent, key selection considerations include its triple-domain power architecture (D1/D2/D3), 16-bit ADCs with 3.6 MSPS, 2× 12-bit DACs, ultra-low-power comparators, and support for external SDRAM/NOR/NAND via flexible memory controller.

Technical Context

The STM32H743IIT6 implements a multi-bus interconnect matrix with one AXI and two AHB bus matrices, enabling concurrent high-bandwidth data transfers between CPU, peripherals, and memory domains. Its three independent PLLs (system + two kernel) support fractional-N synthesis for precise clock distribution across D1/D2/D3 domains.

It features a 3-tier power architecture: D1 domain hosts the Cortex-M7 core and high-speed peripherals (e.g., Ethernet, USB HS); D2 manages communication interfaces (CAN FD, SDMMC, SPI/I2S); D3 handles reset/clock/power management and low-power timers - each domain supports independent voltage scaling and clock gating.

Key Specifications

Pinout & Package

LQFP100 package: 14 × 14 mm body, 0.5 mm pitch, exposed thermal pad (EP), RoHS-compliant, ECOPACK2 certified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance MCU applications.

Compared with STM32H753IIT6, the H743IIT6 trades crypto acceleration for lower cost and identical analog/peripheral integration; versus i.MX RT1176, it offers superior analog subsystem density and deterministic real-time performance but less multimedia throughput.

Availability

STM32H743IIT6 is available at Aetrix Electronics and suitable for industrial HMI, motor control, medical imaging edge nodes, and secure IIoT gateways requiring stable component supply across long-life production cycles.

Supply support for STM32H743IIT6 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 STM32H7 series targets high-end embedded applications demanding real-time determinism, rich peripheral integration, and energy efficiency - designed specifically for industrial automation, advanced HMI, and intelligent edge devices.

FAQ

What is the maximum operating frequency and core type of the STM32H743IIT6?

The STM32H743IIT6 features an Arm Cortex-M7 core rated for up to 480 MHz operation, validated across industrial temperature range (–40°C to +85°C). It includes double-precision floating-point unit (FPU), 16 KB instruction cache, and 16 KB data cache, delivering 1027 DMIPS at peak frequency per Dhrystone 2.1 benchmark.

Does the STM32H743IIT6 support external SDRAM, and what interface is used?

Yes, the STM32H743IIT6 supports external SDRAM up to 100 MHz using its Flexible Memory Controller (FMC) with 32-bit data bus. The FMC also supports NOR/NAND flash, PSRAM, and SRAM, with dedicated control signals (RAS/CAS/WE) and address/data multiplexing compatible with standard LPDDR/SDR SDRAM chips.

How many CAN FD interfaces does the STM32H743IIT6 integrate, and are they fully compliant?

The STM32H743IIT6 integrates two fully compliant CAN FD controllers (FDCAN1 and FDCAN2), supporting ISO 11898-1:2015 with bit rates up to 5 Mbps in FD mode and classic CAN up to 1 Mbps. Both controllers include dedicated message RAM, Tx FIFOs, and hardware timestamping for deterministic networking in automotive and industrial applications.

What are the key low-power capabilities of the STM32H743IIT6 in Standby mode?

In Standby mode with Backup SRAM disabled and RTC + LSE enabled, the STM32H743IIT6 consumes only 2.95 µA. This mode retains RTC calendar, backup registers, and wake-up capability via WKUP pins or RTC alarm - ideal for battery-backed applications like smart meters and portable diagnostics where multi-year operation is required.