STMicroelectronics STM32H7B3RIT6

Overview

STM32H7B3RIT6 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 STM32H7B3RIT6 datasheet, STM32H7B3RIT6 pinout, STM32H7B3RIT6 application, or STM32H7B3RIT6 equivalent, key selection criteria include its 280 MHz CPU frequency, dual-bank flash with RWW support, TCM RAM partitioning for deterministic real-time routines, and cryptographic acceleration (AES/GCM/SHA-2/HMAC) for secure firmware updates and trusted boot.

Technical Context

The STM32H7B3RIT6 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 interfaces enabling single-cycle cache-line fills from 128-bit flash. Its interconnect matrix comprises one AXI and two AHB bus matrices with five DMA controllers-including MDMA for high-speed peripheral-to-memory transfers.

It integrates two independent power domains (CPU domain and Smart Run Domain), supporting voltage scaling, retention-mode operation, and ultra-low-power Stop mode (32 µA with full RAM retention). Clock management includes three fractional PLLs, 64 MHz HSI, 48 MHz HSI48, and 32 kHz LSE-enabling precise RTC operation and low-jitter audio clocking via dedicated audio PLL.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant ECOPACK2 construction. Pin count reduced vs. larger variants (e.g., LQFP144), optimized for cost-sensitive, space-constrained applications where full peripheral set is not required.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H743VIT6, the STM32H7B3RIT6 trades I/O count and flash size for integrated SMPS and smaller LQFP64 packaging - ideal for compact, battery-aware edge nodes. Versus STM32H750VBH6, it doubles flash capacity and retains LQFP manufacturability while delivering identical power architecture and cryptographic features.

Availability

STM32H7B3RIT6 is available at Aetrix Electronics and suitable for industrial motor control, medical imaging subsystems, and smart building HMI applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STM32H7B3RIT6 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 performance, security, and rich multimedia capabilities - specifically engineered for motor control, industrial automation, medical devices, and advanced human-machine interfaces.

FAQ

What is the maximum operating frequency and supported voltage range for STM32H7B3RIT6?

The STM32H7B3RIT6 operates at up to 280 MHz using its Arm Cortex-M7 core. Its application supply voltage 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 the internal PVD enabled, minimum voltage is 1.71 V. The integrated SMPS supports input voltages from 2.7 V to 5.5 V.

Does STM32H7B3RIT6 support secure firmware updates and cryptographic functions?

Yes. It includes hardware AES-128/192/256 engines supporting ECB, CBC, CTR, GCM, and CCM modes; SHA-1/SHA-2 hash and HMAC computation; a true random number generator (TRNG); and on-the-fly decryption (OTFDEC) for external Octo-SPI memory. These features enable secure boot, authenticated firmware updates, and TLS acceleration in resource-constrained edge devices.

How does the LQFP64 package affect peripheral availability compared to larger STM32H7B3 variants?

The LQFP64 package (STM32H7B3RIT6) provides 49 GPIOs and supports core peripherals including USB OTG_FS, 5x USART/UART, 6x SPI/I2S, 4x I2C, 2x ADCs (24-channel total), 2x DACs, and Octo-SPI. It omits FMC, second SDMMC, HDMI-CEC, SAI2, and some timers found in 100+ pin variants - making it optimal for applications prioritizing compactness and cost over maximum peripheral count.

What low-power modes are available and what is the lowest achievable current consumption?

STM32H7B3RIT6 supports Sleep, Stop, and Standby modes. In Stop mode with full SRAM retention and clocks disabled, current drops to 32 µA. In Standby mode with Backup SRAM OFF, RTC and LSE ON, and PDR OFF, consumption is 2.8 µA. With VBAT supply active (RTC + LSE only), it achieves 0.8 µA - enabling multi-year battery life in metering or sensor-edge applications.