STMicroelectronics STM32H7A3VIH6Q

Overview

STM32H7A3VIH6Q from STMicroelectronics is a 32-bit Arm® Cortex®-M7 microcontroller operating at up to 280 MHz with double-precision FPU, 2 Mbytes of flash memory, 1.4 Mbytes of RAM (including 64 Kbytes ITCM + 128 Kbytes DTCM), and integrated SMPS regulator. It features dual Octo-SPI interfaces, FMC for NOR/SDRAM/NAND, two 16-bit ADCs (up to 24 channels, 3.6 MSPS), dual DACs, two op-amps, and hardware JPEG codec - deployed in industrial PLCs, motor drives, and medical imaging systems.

For engineers reviewing the STM32H7A3VIH6Q datasheet, STM32H7A3VIH6Q pinout, STM32H7A3VIH6Q application, or STM32H7A3VIH6Q equivalent, key selection criteria include verified 280 MHz CPU performance with L1 cache, confirmed SMPS integration for power efficiency, validated dual Octo-SPI timing (140 MHz SDR / 110 MHz DTR), and package-specific GPIO count (168 I/Os in UFBGA176+25).

Technical Context

The STM32H7A3VIH6Q implements a six-stage dual-issue Cortex-M7 core with Harvard architecture, 16 KB instruction and 16 KB data caches, and deterministic TCM memory access (64 KB ITCM + 128 KB DTCM) for time-critical routines. Its interconnect matrix comprises one AXI and two AHB bus matrices with five DMA controllers including MDMA for high-speed peripheral offload.

It integrates three PLLs (system + two kernel clocks) with fractional mode, dual 16-bit ADCs supporting simultaneous sampling across 24 channels, and two DFSDM units (8-channel + 2-channel) for sigma-delta sensor interfacing. The device supports two CAN FD controllers and one time-triggered CAN (TT-CAN), plus LCD-TFT controller with Chrom-ART DMA2D acceleration and hardware JPEG compression/decompression.

Key Specifications

Pinout & Package

STM32H7A3VIH6Q is housed in a 176+25-ball UFBGA package (10 × 10 mm, 0.65 mm pitch) with 168 user I/Os, including 164 5-V-tolerant pins and dedicated power/ground balls for noise-sensitive analog and digital domains. Pin functions are validated per DS13195 Rev 8 Table 7 (pin/ball definition) and RM0455 Section 11.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance Cortex-M7 microcontroller applications.

Compared with STM32H7B3VIH6, the STM32H7A3VIH6Q offers integrated SMPS for reduced BOM and better efficiency, while STM32H743VIT6 trades I/O count and memory interface speed for lower package cost and legacy compatibility.

Availability

STM32H7A3VIH6Q is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging devices, motor drive controllers, and smart building gateways requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STM32H7A3VIH6Q 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time performance, rich connectivity, and advanced graphics - specifically engineered for motor control, medical instrumentation, and human-machine interface systems.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32H7A3VIH6Q achieves 280 MHz CPU frequency using its Arm Cortex-M7 core with six-stage dual-issue pipeline, dynamic branch prediction, and 16 KB instruction/data caches. This requires stable 1.2 V core supply (via SMPS or LDO), proper clock tree configuration (PLL1 with fractional mode), and enabling I/D-cache and prefetch. DS13195 specifies this frequency is guaranteed across −40 °C to +85 °C with VDD ≥ 1.71 V (or 1.62 V with external supervisor).

Does STM32H7A3VIH6Q support external SDRAM, and what interface is used?

Yes, STM32H7A3VIH6Q supports external SDRAM through its Flexible Memory Controller (FMC) interface, which provides a 32-bit data bus and supports SDRAM/LPSDR SDRAM operation. The FMC is accessible only in packages with ≥100 pins (e.g., UFBGA176+25), and timing parameters are defined in DS13195 Section 6.3.2. It does not support DDR SDRAM - only single-data-rate SDRAM up to 125 MHz in synchronous mode.

How many analog-to-digital converters does STM32H7A3VIH6Q have, and what are their key specs?

It integrates two 16-bit ADCs (ADC1 and ADC2), each supporting up to 24 input channels and simultaneous sampling. Maximum conversion rate is 3.6 MSPS in interleaved mode with hardware oversampling. Both ADCs share common analog supplies (VDDA/VSSA) and reference (VREF+), and support programmable sampling time, injected/conversion sequences, and analog watchdogs - fully documented in RM0455 Chapter 22.

Is the UFBGA176+25 package RoHS and REACH compliant?

Yes, all STM32H7A3xI/G devices, including STM32H7A3VIH6Q in UFBGA176+25, are ECOPACK2-compliant - meeting RoHS Directive 2011/65/EU, REACH Regulation (EC) No. 1907/2006, and halogen-free requirements. Package materials data and declarations are published in ST's official product change notifications and material declarations portal.