STMicroelectronics STM32H7B3RIT6TR

Overview

STM32H7B3RIT6TR 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, 192 Kbytes of TCM RAM (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 STM32H7B3RIT6TR datasheet, STM32H7B3RIT6TR pinout, STM32H7B3RIT6TR application, or STM32H7B3RIT6TR equivalent, key selection criteria include its 280 MHz real-time performance, dual-bank flash with read-while-write, 168 GPIOs with 133 MHz toggle rate, and cryptographic acceleration for secure firmware updates in resource-constrained edge devices.

Technical Context

The device implements a six-stage dual-issue Cortex-M7 core with Harvard architecture, 16 KB instruction and 16 KB data caches, and tightly coupled memory interfaces enabling deterministic execution of time-critical routines. Its interconnect matrix comprises one AXI and two AHB bus matrices with five DMA controllers-including MDMA for high-speed peripheral-to-memory transfers.

Memory subsystem includes 2 MB flash (dual-bank, RWW), ~1.4 MB RAM split across TCM, user SRAM, and backup domains, plus flexible external memory support via FMC (NOR/SDRAM/NAND) and two Octo-SPI interfaces running up to 140 MHz SDR mode. Security features include ROP/PC-ROP, active tamper detection, and two OTFDEC engines for encrypted external memory access.

Key Specifications

Pinout & Package

STM32H7B3RIT6TR is housed in a 64-pin LQFP package (10 × 10 mm, ECOPACK2-compliant) with 51 general-purpose I/Os, including 49 5-V-tolerant pins. The package supports all core peripherals except FMC and second Octo-SPI (disabled due to pin count limitation).

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 RIT6TR trades FMC and pin count for compact LQFP64 packaging and integrated SMPS - ideal for space-constrained edge nodes. Against STM32H753VIT6, it prioritizes power integration and cost over maximum SRAM and advanced boot security - better suited for cost-sensitive industrial HMIs than safety-critical avionics.

Availability

STM32H7B3RIT6TR is available at Aetrix Electronics and suitable for industrial motor control, portable medical imaging, smart building HMI, and secure IoT gateway applications requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for STM32H7B3RIT6TR 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 components for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time performance, rich graphics, advanced security, and energy efficiency - exemplified by the H7B3's integrated SMPS, hardware JPEG, and dual OTFDEC engines.

FAQ

What is the maximum operating frequency and supported voltage range for STM32H7B3RIT6TR?

The STM32H7B3RIT6TR operates at up to 280 MHz with a supply voltage range of 1.62 V to 3.6 V. At 280 MHz, it requires VOS0 voltage scaling (core voltage ≥ 1.26 V); below 200 MHz, lower VOS levels reduce power consumption. The 1.62 V minimum is achievable only with external power supervisor and PDR_ON pin tied to VSS - otherwise, 1.71 V is enforced by internal PVD.

Does STM32H7B3RIT6TR support external memory interfaces like SDRAM or NAND flash?

No - the LQFP64 package (RIT6TR) excludes the Flexible Memory Controller (FMC). As confirmed in DS13139 Table 1, FMC is unavailable in all 64-pin variants. Only Octo-SPI and SPI interfaces are enabled for external memory; SDRAM, NOR, and NAND support require packages with ≥100 pins (e.g., LQFP144 or TFBGA225).

How many ADC channels and what resolution does STM32H7B3RIT6TR provide?

It integrates two 16-bit ADCs supporting up to 24 total channels (16 shared, 8 dedicated), with maximum sampling rate of 3.6 MSPS in interleaved mode. Each ADC has independent calibration, offset adjustment, and hardware oversampling - enabling precise current/voltage sensing in motor control and medical analog front-ends.

Is the USB OTG interface on STM32H7B3RIT6TR capable of high-speed operation?

Yes - it includes a USB OTG HS/FS interface with ULPI support, capable of 480 Mbps high-speed operation when paired with an external PHY. The internal USB regulator supplies the FS PHY; for HS mode, an external ULPI PHY (e.g., USB3343) must be used, connected via PC2/PC3 (ULPI_CLK/ULPI_Dx) pins routed per DS13139 Section 9.1.