STMicroelectronics STM32H7A3NIH6Q

Overview

STM32H7A3NIH6Q from STMicroelectronics is a 32-bit Arm® Cortex®-M7 microcontroller operating at up to 280 MHz, featuring dual-precision FPU, 16 KB instruction/16 KB data cache, 2 MB flash, and ~1.4 MB RAM (including 64 KB ITCM + 128 KB DTCM). It integrates dual Octo-SPI interfaces, FMC, 2x ADCs (16-bit, 3.6 MSPS), 2x DACs, 2x op-amps, and supports CAN FD and TT-CAN - deployed in industrial PLCs and motor control systems.

For engineers reviewing the STM32H7A3NIH6Q datasheet, STM32H7A3NIH6Q pinout, STM32H7A3NIH6Q application, or STM32H7A3NIH6Q equivalent, key selection considerations include its 280 MHz Cortex-M7 core with L1 cache, SMPS-integrated power architecture, dual-bank flash with RWW, TCM RAM allocation for real-time routines, and package-specific peripheral availability in UFBGA169 (7 × 7 mm).

Technical Context

The device implements a Harvard-architecture Cortex-M7 core with six-stage dual-issue pipeline and dynamic branch prediction, enabling deterministic execution of time-critical firmware. Its memory subsystem includes AXI/AHB bus matrices, three independent power domains (CPU, SRD, Backup), and hardware-accelerated peripherals including JPEG codec, Chrom-ART DMA2D, and GFXMMU for graphics offload.

Peripherals are distributed across four APB, three AHB, and one AXI interconnect; clocking uses three fractional PLLs (system + two kernel), while power management leverages SMPS step-down regulator, scalable LDO, and VOS voltage scaling modes to achieve 32 µA Stop mode with full RAM retention and 0.8 µA VBAT operation.

Key Specifications

Pinout & Package

STM32H7A3NIH6Q is housed in a 169-ball Ultra-Fine-Pitch Ball Grid Array (UFBGA169) package measuring 7 mm × 7 mm with 0.5 mm ball pitch, compliant with ECOPACK2 environmental standards. The package supports 168 general-purpose I/Os, including 164 5-V-tolerant pins, and features dedicated power/ground balls for noise-sensitive analog and digital domains.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H7B3IIK6 and STM32H743VIT6, the STM32H7A3NIH6Q uniquely combines integrated SMPS, TT-CAN, dual DFSDM, and UFBGA169 packaging - making it optimal for compact, power-sensitive industrial edge nodes requiring deterministic real-time control and multi-protocol fieldbus support.

Availability

STM32H7A3NIH6Q is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging devices, smart HVAC controllers, and wearable health monitors requiring stable component supply across extended product lifecycles.

Supply support for STM32H7A3NIH6Q 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 with over 45 years of industrial design-in experience.

The STM32H7 series targets high-end embedded applications demanding real-time performance, graphics capability, and functional safety - designed specifically for industrial automation, medical equipment, and advanced human-machine interfaces.

FAQ

What is the maximum operating frequency and supported voltage range for STM32H7A3NIH6Q?

The STM32H7A3NIH6Q operates at up to 280 MHz with a supply voltage range of 1.62 V to 3.6 V. At voltages below 2.7 V, the I/O high-speed low-voltage (HSLV) feature must be enabled for full-speed operation on compatible pins. The device supports voltage scaling (VOS0–VOS3) to optimize performance versus power consumption in Run and Stop modes.

Does STM32H7A3NIH6Q include hardware security features for firmware protection?

Yes - it integrates Read-Out Protection (ROP), PC-ROP (Program Counter Read-Out Protection), active tamper detection with dedicated pins, and secure firmware upgrade mechanisms. These features support secure boot and runtime integrity verification, aligning with IEC 62443-3-3 SL2 requirements for industrial control systems.

How many analog-to-digital converters does STM32H7A3NIH6Q provide, and what are their key specifications?

It includes two 16-bit ADCs supporting up to 24 channels total and a combined sampling rate of 3.6 MSPS. Both ADCs share common analog inputs and support hardware oversampling, injected/conversion sequencing, and analog watchdogs - enabling precise multi-sensor acquisition for motor control and condition monitoring.

What external memory interfaces are supported, and what are their maximum clock rates?

The device supports two Octo-SPI interfaces (up to 140 MHz SDR / 110 MHz DTR), a Flexible Memory Controller (FMC) for NOR/PSRAM/SDRAM/NAND (up to 125 MHz synchronous), and two SDMMC interfaces (up to 133 MHz). These allow direct attachment of serial and parallel memories without external glue logic.