STMicroelectronics STM32H7B3ZIT6Q

Overview

STM32H7B3ZIT6Q 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 64 KB ITCM + 128 KB DTCM). It integrates two Octo-SPI interfaces with on-the-fly AES-128 decryption, FMC for SDRAM/NAND/NOR, and supports CAN FD and TT-CAN for real-time industrial control.

For engineers reviewing the STM32H7B3ZIT6Q datasheet, STM32H7B3ZIT6Q pinout, STM32H7B3ZIT6Q application, or STM32H7B3ZIT6Q equivalent, key selection criteria include its 280 MHz CPU frequency, dual-bank flash with read-while-write, TCM RAM partitioning for deterministic timing, SMPS support for high-efficiency power delivery, and hardware JPEG/Chrom-ART acceleration for embedded graphics.

Technical Context

The STM32H7B3ZIT6Q implements a six-stage dual-issue Cortex-M7 core with dynamic branch prediction and Harvard architecture, enabling deterministic execution of time-critical firmware in motor control and real-time audio processing. Its interconnect matrix comprises one AXI and two AHB bus matrices, plus five DMA controllers-including MDMA for high-bandwidth peripheral-to-memory transfers-reducing CPU load during sensor data acquisition or display refresh.

Memory subsystem includes dual-bank 2 MB flash with ECC and RWW, 192 KB TCM RAM (64 KB ITCM + 128 KB DTCM), 1.18 MB user SRAM, and 4 KB backup SRAM. Two Octo-SPI interfaces operate up to 140 MHz (SDR) and 110 MHz (DTR), each with dedicated OTFDEC AES-128 engines for secure external memory access without software overhead.

Key Specifications

Pinout & Package

STM32H7B3ZIT6Q is housed in a 144-pin LQFP package (20 × 20 mm, 0.5 mm pitch), ECOPACK2-compliant, with 97 GPIOs (168 total available across family), including 164 5-V-tolerant pins and fast I/Os rated up to 133 MHz. The package supports all core peripherals including dual Octo-SPI, FMC, USB OTG_HS/FS, SDMMC, LCD-TFT, and cryptographic accelerators.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H743VIT6, the STM32H7B3ZIT6Q delivers higher integration via SMPS and dual OTFDEC engines, reducing BOM count and enabling secure external memory; versus STM32H753ZIT6, it trades some security features (SHA-256, extra tamper pins) for identical core performance at lower unit cost.

Availability

STM32H7B3ZIT6Q is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging systems, smart building HVAC controllers, and secure IoT gateways requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STM32H7B3ZIT6Q 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 products for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, rich connectivity, and hardware-accelerated graphics/crypto - specifically engineered for motor control, medical imaging, and secure edge computing.

FAQ

What is the maximum operating frequency and supported voltage range for STM32H7B3ZIT6Q?

The STM32H7B3ZIT6Q operates at up to 280 MHz under VOS0 voltage scaling. Its application supply range is 1.62 V to 3.6 V; operation down to 1.62 V requires an external power supervisor and PDR_ON pin tied to VSS. With internal PVD enabled, minimum supply is 1.71 V. All I/Os are 5-V-tolerant across this range.

Does STM32H7B3ZIT6Q support external memory encryption, and how is it implemented?

Yes - it integrates two dedicated OTFDEC (On-The-Fly Decryption) AES-128 engines, one per Octo-SPI interface. Each engine decrypts data in CTR mode during read access from external Octo-SPI memories (e.g., HyperRAM or NOR flash), with keys stored in secure OTP or TAMP registers. No CPU involvement is required during decryption.

How many timers and communication interfaces does STM32H7B3ZIT6Q provide?

It provides 19 timers: 2× 32-bit general-purpose, 2× 16-bit advanced motor control, 10× 16-bit general-purpose, 3× 16-bit low-power, plus SysTick and RTC. Communication interfaces include 2× CAN FD + 1× TT-CAN, 6× SPI/I2S, 5× USART/UART + 1× LPUART, 2× SDMMC, 2× SAI, SPDIFRX, SWPMI, MDIO, USB OTG_HS/FS, HDMI-CEC, and FDCAN.

What package and pin count does STM32H7B3ZIT6Q use, and which peripherals are fully supported?

STM32H7B3ZIT6Q uses a 144-pin LQFP package (20 × 20 mm, 0.5 mm pitch) with 97 GPIOs. Fully supported peripherals include dual Octo-SPI, FMC, USB OTG_HS/FS, 2× SDMMC, LCD-TFT controller, JPEG codec, Chrom-ART, 2× ADCs, 2× DACs, DFSDM, and cryptographic accelerators - all accessible within pin constraints per Table 7 of DS13139 Rev 8.