STMicroelectronics STM32H7B3VIT6

Overview

STM32H7B3VIT6 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 supports dual Octo-SPI interfaces with on-the-fly AES-128 decryption, hardware JPEG codec, and LCD-TFT controller - deployed in industrial motor control, medical imaging subsystems, and high-resolution HMI applications.

For engineers reviewing the STM32H7B3VIT6 datasheet, STM32H7B3VIT6 pinout, STM32H7B3VIT6 application, or STM32H7B3VIT6 equivalent, key selection criteria include its 280 MHz real-time performance, dual-bank flash with RWW support, TCM RAM partitioning for deterministic code execution, and cryptographic acceleration (AES-GCM/CCM, HASH, TRNG) required for secure boot and firmware updates.

Technical Context

The STM32H7B3VIT6 implements a six-stage dual-issue Cortex-M7 core with Harvard architecture, 16 KB instruction and 16 KB data L1 caches, and tightly coupled memory (ITCM/DTCM) for zero-wait-state execution of time-critical routines. Its interconnect matrix includes one AXI and two AHB bus matrices, five DMA controllers (including MDMA and DFSDM-dedicated DMA), and three PLLs with fractional mode for precise clock domain isolation.

It integrates dual Octo-SPI controllers supporting SDR/DTR modes up to 140/110 MHz, FMC for NOR/PSRAM/SDRAM/NAND, and advanced analog peripherals: two 16-bit ADCs (up to 3.6 MSPS, 24 channels), dual DACs (1× single-channel + 1× dual-channel, 12-bit), two ultra-low-power comparators, and two 8-MHz op-amps - all mapped across CPU and Smart Run Domains for power-aware peripheral activation.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with 100 leads; RoHS-compliant ECOPACK2; thermal pad exposed on underside for enhanced heat dissipation in continuous 280 MHz operation.

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 STM32H7B3VIT6 delivers higher memory density and integrated security features essential for encrypted edge AI inference; versus STM32H753VIT6, it trades certified tamper resistance for lower unit cost while retaining identical real-time performance and power architecture.

Availability

STM32H7B3VIT6 is available at Aetrix Electronics and suitable for industrial motor control, medical imaging subsystems, smart building HMIs, and secure IIoT gateways requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STM32H7B3VIT6 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 multimedia capability, and hardware-enforced security - specifically engineered for motor control, medical devices, and intelligent edge nodes where performance-per-watt and functional safety are critical.

FAQ

What is the maximum operating temperature range for STM32H7B3VIT6?

The STM32H7B3VIT6 is rated for ambient temperatures from −40 °C to +85 °C, with a junction temperature limit of 130 °C. In VOS0 voltage scaling mode, the junction temperature must be kept below 105 °C to maintain guaranteed performance and reliability per DS13139 Rev 8 specifications.

Does STM32H7B3VIT6 support USB High-Speed device mode without an external PHY?

Yes - the STM32H7B3VIT6 integrates a USB OTG HS/FS controller with an internal ULPI interface and dedicated USB 3.3 V regulator. When configured in HS mode, it connects directly to an external ULPI PHY (e.g., USB334x) using 8-bit parallel signals (D[7:0], CLK, DIR, NXT, STP), eliminating need for discrete transceivers.

How many Octo-SPI interfaces does STM32H7B3VIT6 provide, and what memory types do they support?

The STM32H7B3VIT6 provides two independent Octo-SPI interfaces (OCTOSPI1 and OCTOSPI2), each supporting serial NOR flash, HyperRAM, PSRAM, and serial NAND in both SDR and DTR modes. OCTOSPI1 runs up to 140 MHz in SDR and 110 MHz in DTR; OCTOSPI2 shares identical timing specs and includes on-the-fly AES-128 decryption via OTFDEC2.

Can the internal SMPS regulator supply both VCORE and external circuitry simultaneously?

Yes - the integrated SMPS step-down converter can be configured to supply the VCORE domain directly or drive an external buck converter stage. Its output (VLXSMPS) is externally accessible via dedicated pins (VLXSMPS, VFBSMPS), enabling hybrid power architectures where the SMPS powers the MCU core while a secondary regulator supplies noise-sensitive analog or interface circuits.