STMicroelectronics STM32H747AII6

Overview

STM32H747AII6 from STMicroelectronics is a dual-core 32-bit Arm® Cortex®-M7 (480 MHz) and Cortex®-M4 (240 MHz) microcontroller with 2 MB flash, 1 MB RAM (192 KB TCM + 864 KB SRAM), and integrated SMPS regulator. It features 168 GPIOs, dual-domain power management (D1/D2/D3), and supports real-time deterministic control in industrial automation, motor drives, and embedded vision systems.

For engineers reviewing the STM32H747AII6 datasheet, STM32H747AII6 pinout, STM32H747AII6 application, or STM32H747AII6 equivalent, key selection considerations include dual-core asymmetric execution capability, 240 MHz M4 for real-time peripherals vs. 480 MHz M7 for compute-intensive tasks, SMPS integration for >30% power reduction over LDO-only operation, and UFBGA169 package compatibility with high-density PCB layouts.

Technical Context

The device implements a three-domain power architecture (D1 high-performance, D2 communication/timers, D3 reset/clock/PM) enabling independent clock gating and domain shutdown. Its interconnect matrix includes one AXI and two AHB bus matrices with five AHB2-APB and two AXI2-AHB bridges to manage concurrent high-bandwidth data flows between dual cores and peripherals.

Dual-core operation is coordinated via shared memory, mailbox, and semaphore mechanisms, with the M7 core handling complex algorithms (JPEG decode, FFT, AI inference) while the M4 manages time-critical I/O (CAN FD, PWM motor control, ADC sampling at 3.6 MSPS) using dedicated TCM RAM and ART Accelerator for zero-wait-state flash execution.

Key Specifications

Pinout & Package

STM32H747AII6 is packaged in UFBGA169 (7 × 7 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2 certified. The ball grid provides 168 user I/Os plus power/ground balls, supporting high-speed signal integrity with dedicated VCAP, VDDA, VREF+, and multiple VSS/VDD domains.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core Arm Cortex-M microcontroller applications.

Compared with STM32H747AII6, STM32H757IIT6 adds hardware crypto engines essential for secure boot and firmware signing, while i.MX RT1176AVM8B trades integrated power management and compact UFBGA169 for higher M7 clock speed and larger memory map - making it suitable for non-battery-powered, compute-intensive gateways.

Availability

STM32H747AII6 is available at Aetrix Electronics and suitable for industrial motor control, embedded vision systems, HMI with TFT display, and automotive gateway applications requiring stable component supply across multi-year production cycles.

Supply support for STM32H747AII6 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 R&D investment in Arm-based MCU platforms.

The STM32H7 series targets high-performance embedded applications demanding real-time determinism, rich peripheral integration, and energy efficiency - particularly in industrial automation, medical devices, and advanced human-machine interfaces.

FAQ

What is the maximum operating frequency of each core in the STM32H747AII6?

The Arm Cortex-M7 core operates at up to 480 MHz (1027 DMIPS), while the Cortex-M4 core runs at up to 240 MHz (300 DMIPS). Both frequencies are achievable simultaneously when using the SMPS regulator and proper voltage scaling configuration (VOS0 range), as confirmed in Section 6.3.14 of DS12930 Rev 3.

Does the STM32H747AII6 support external SDRAM, and what is the maximum clock rate?

Yes, the Flexible Memory Controller (FMC) supports SDRAM and LPDDR SDRAM with synchronous operation up to 125 MHz, as specified in Section 6.3.20 of the datasheet. This enables frame buffer expansion for display or vision applications requiring >1 MB of contiguous memory.

How many ADC channels does the STM32H747AII6 provide, and what is the maximum sampling rate?

The device integrates three 16-bit ADCs supporting up to 36 total channels and a combined sampling rate of 3.6 MSPS. Each ADC can operate independently or in interleaved mode, with hardware oversampling and digital filtering supported via the DFSDM peripheral.

Is the UFBGA169 package of the STM32H747AII6 compatible with standard reflow profiles?

Yes, the UFBGA169 (7 × 7 mm, 0.5 mm pitch) package complies with JEDEC J-STD-020 moisture sensitivity level 3 and supports standard Pb-free reflow profiles (peak temperature ≤ 260 °C). Thermal characteristics in Section 7.7 confirm θ_JA = 30.5 °C/W for 4-layer board design.