STMicroelectronics STM32H7B3NIH6Q

Overview

STM32H7B3NIH6Q from STMicroelectronics is a 32-bit Arm® Cortex®-M7 microcontroller operating at up to 280 MHz, featuring dual-precision FPU, 16 KB instruction and 16 KB data cache, 2 MB flash, and ~1.4 MB RAM (including 192 KB TCM). It integrates dual Octo-SPI with on-the-fly AES-128 decryption, FMC for SDRAM/NOR/PSRAM, dual CAN FD + TT-CAN, USB OTG HS/FS, JPEG codec, and LCD-TFT controller - deployed in industrial motor control, medical imaging, and IoT edge gateways.

For engineers reviewing the STM32H7B3NIH6Q datasheet, STM32H7B3NIH6Q pinout, STM32H7B3NIH6Q application, or STM32H7B3NIH6Q equivalent, key selection criteria include verified 280 MHz real-time performance, dual-bank flash with RWW support, deterministic TCM latency for safety-critical routines, and hardware crypto acceleration (AES-GCM/SHA-2/HMAC) compliant with IEC 62443-3-3.

Technical Context

The device implements a six-stage dual-issue Cortex-M7 core with dynamic branch prediction and Harvard architecture, enabling 599 DMIPS at 280 MHz. Its memory subsystem includes AXI/AHB interconnect matrices, three independent power domains (CPU, SRD, Backup), and configurable voltage scaling across Run/Stop modes.

Peripherals are distributed across four APB buses and three AHB buses, with dedicated MDMA for high-bandwidth transfers and two DFSDM units (8+2 filters) supporting sigma-delta sensor interfaces. The dual Octo-SPI controllers operate up to 140 MHz SDR and 110 MHz DTR, each with independent OTFDEC AES-128 engines for secure external memory access.

Key Specifications

Pinout & Package

STM32H7B3NIH6Q is housed in a WLCSP132 package (4.57 × 4.37 mm, 0.4 mm pitch), optimized for space-constrained portable and wearable applications. This ultra-compact wafer-level chip-scale package supports full I/O functionality including 168 GPIOs (164 5-V-tolerant), dual Octo-SPI, FMC, USB ULPI, and SDMMC with VDDMMC separation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H743VIH6, STM32H7B3NIH6Q delivers integrated SMPS and USB regulator for simplified power design, while STM32H753IIK6 extends security with PKA and larger memory - making STM32H7B3NIH6Q optimal for balanced performance, power efficiency, and hardware crypto in compact industrial edge nodes.

Availability

STM32H7B3NIH6Q is available at Aetrix Electronics and suitable for industrial motor control, medical imaging edge nodes, smart building gateways, and secure industrial IoT edge deployments requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STM32H7B3NIH6Q 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 management ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, rich peripheral integration, and hardware security - specifically engineered for industrial automation, medical equipment, and next-generation IoT edge intelligence.

FAQ

What is the maximum operating frequency and thermal specification for STM32H7B3NIH6Q?

The STM32H7B3NIH6Q operates at up to 280 MHz across the −40 °C to +85 °C ambient temperature range. Its junction temperature is rated to 130 °C, with a derating limit of 105 °C in VOS0 voltage scaling mode. Thermal performance is validated using the WLCSP132 package's 0.4 mm pitch and exposed die pad, requiring PCB copper pour and thermal vias per ST AN5057 guidelines.

Does STM32H7B3NIH6Q support hardware encryption for external Octo-SPI memory?

Yes - it integrates two independent OTFDEC (On-The-Fly Decryption) modules, each implementing AES-128 in CTR mode for secure access to external Octo-SPI NOR/PSRAM/HyperRAM. Each module decrypts data in real time during read operations without CPU intervention, supporting key rotation and secure key storage in OTP memory.

How many GPIOs and what I/O voltage tolerance does STM32H7B3NIH6Q provide?

It provides up to 168 I/O ports, of which 164 are 5-V-tolerant across all supported voltage ranges (1.62–3.6 V). Fast I/Os achieve up to 133 MHz toggle rate. Pin functions are multiplexed via SYSCFG registers, and all GPIOs support external interrupt generation with configurable wakeup capability on 6 dedicated WKUP pins.

Is the JPEG codec capable of real-time encoding and decoding?

Yes - the hardware JPEG codec supports both encoding and decoding of baseline JPEG (YUV422) at up to 60 fps for XGA (1024×768) resolution. It operates independently of the CPU via DMA, with dedicated FIFOs and programmable quality/compression parameters. Latency is fixed at ~1.2 ms per frame, confirmed in ST Application Note AN5277.