STMicroelectronics STM32H743AII6

Overview

STM32H743AII6 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 CAN FD interfaces, and hardware JPEG codec. It integrates LCD-TFT controller, Chrom-ART accelerator, and high-resolution timer for real-time industrial HMI and motor control applications.

For engineers reviewing the STM32H743AII6 datasheet, STM32H743AII6 pinout, STM32H743AII6 application, or STM32H743AII6 equivalent, key selection criteria include dual-domain power management (D1/D2/D3), 16-bit ADC resolution at 3.6 MSPS, Quad-SPI interface up to 133 MHz, and support for USB OTG HS/FS with crystal-less operation.

Technical Context

The STM32H743AII6 implements a triple-domain power architecture (D1 high-performance, D2 communication/timers, D3 reset/clock/power), enabling selective clock gating and voltage scaling across six configurable ranges. Its interconnect matrix comprises one AXI and two AHB bus matrices with five AHB2-APB bridges, supporting concurrent high-bandwidth peripheral access.

It integrates three PLLs - one system clock PLL and two kernel-clock PLLs with fractional mode - feeding independent clock trees for CPU, peripherals, and audio/video subsystems. The device supports true low-power modes including Standby at 2.95 µA (RTC/LSE ON, Backup SRAM OFF) and VBAT battery operation with charging capability.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with 100 leads; ECOPACK2 compliant, RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H753VIT6, the STM32H743AII6 trades crypto acceleration for lower cost and identical analog/peripheral integration; versus i.MX RT1176DVMAA, it offers superior on-chip graphics and deterministic real-time performance without external memory latency.

Availability

STM32H743AII6 is available at Aetrix Electronics and suitable for industrial HMI, motor control, medical imaging edge nodes, and secure industrial gateways requiring stable component supply across long-life production cycles.

Supply support for STM32H743AII6 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, specializing in microcontrollers, power management, sensors, and automotive ICs with strong industrial and automotive focus.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, rich graphics, and multi-protocol connectivity - designed specifically for industrial automation, medical equipment, and advanced human-machine interfaces.

FAQ

What is the maximum operating frequency of the STM32H743AII6?

The STM32H743AII6 operates at a maximum CPU frequency of 480 MHz using its Arm Cortex-M7 core. This is achieved via the main PLL with fractional mode configuration and requires proper VDD scaling (Range 0 or 1) and thermal management. All peripherals remain fully functional at this speed, with timers and ADCs synchronized to dedicated kernel clocks derived from separate PLLs.

Does the STM32H743AII6 support external SDRAM?

Yes, the STM32H743AII6 supports external SDRAM through its Flexible Memory Controller (FMC) with up to 32-bit data bus width and clocking up to 100 MHz in synchronous mode. It supports LPDDR/SDR SDRAM and includes features such as auto-refresh control, programmable timing parameters, and bank interleaving to maximize bandwidth for graphics or data buffering applications.

How many CAN FD interfaces does the STM32H743AII6 include?

The STM32H743AII6 integrates two fully independent CAN FD controllers (FDCAN1 and FDCAN2), each supporting bit rates up to 5 Mbps in FD mode and time-triggered communication (TT-CAN) capability. Both controllers feature dedicated message RAM, flexible filtering, and loopback/self-test modes - enabling robust multi-bus automotive or industrial fieldbus designs without external transceivers beyond physical layer.

Is the STM32H743AII6 pin-compatible with other STM32H743 variants?

Yes, the STM32H743AII6 in LQFP100 package shares identical pinout with all other STM32H743xI/G variants in the same LQFP100 footprint (e.g., STM32H743VIT6, STM32H743VIH6). Pin functions, power/ground assignments, and alternate function mappings are fully compatible, allowing drop-in replacement within the same package family without PCB redesign.