STMicroelectronics STM32H742VIH6TR

Overview

STM32H742VIH6TR from STMicroelectronics is a 32-bit Arm® Cortex®-M7 microcontroller operating at up to 480 MHz, featuring 2 MB flash, 1 MB RAM (including 192 KB TCM), and dual-domain power architecture (D1/D2/D3). It integrates dual CAN FD controllers, Ethernet MAC, LCD-TFT controller, hardware JPEG codec, and 3× 16-bit ADCs (3.6 MSPS), deployed in industrial HMI, motor control gateways, and real-time vision edge nodes.

For engineers reviewing the STM32H742VIH6TR datasheet, STM32H742VIH6TR pinout, STM32H742VIH6TR application, or STM32H742VIH6TR equivalent, key selection considerations include D1/D2/D3 domain clock gating, TCM RAM allocation for deterministic code execution, Quad-SPI interface timing (133 MHz), FMC support for SDRAM/NOR/NAND, and dual CAN FD with time-triggered capability.

Technical Context

The device implements a triple-bus matrix interconnect (1 AXI + 2 AHB) with 5 AHB2-APB and 2 AXI2-AHB bridges, enabling concurrent high-bandwidth peripheral access. Its memory subsystem includes separate ITCM (64 KB) and DTCM (128 KB) for zero-wait-state critical routines, plus 864 KB user SRAM and 4 KB backup SRAM.

Three independent PLLs support fractional synthesis: one system PLL (up to 480 MHz), two kernel PLLs for peripheral clocks (e.g., USB, Ethernet, ADC). The 168-pin LQFP package maps all 35 communication peripherals-including 6 SPI, 4 USART/UART, 2 SDIO, SPDIFRX, SWPMI, and MDIO-across dedicated and remappable GPIO banks with interrupt capability.

Key Specifications

Pinout & Package

LQFP100 package with exposed thermal pad; 100 leads, 0.5 mm pitch, 14 × 14 mm body size, RoHS-compliant and ECOPACK2 certified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance MCU applications.

Compared with STM32H743VIH6 and STM32H753VIH6, the STM32H742VIH6 delivers identical real-time performance, memory hierarchy, and peripheral count-except for omitted ART Accelerator, crypto accelerators, and Octo-SPI-making it optimal for cost-sensitive, non-crypto-intensive HMI and motor control designs.

Availability

STM32H742VIH6TR is available at Aetrix Electronics and suitable for industrial HMI, motor control gateways, and smart vision sensors requiring stable component supply across extended product lifecycles.

Supply support for STM32H742VIH6TR 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, rich connectivity, and graphical capability-designed specifically for industrial automation, medical imaging, and advanced motor control systems.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32H742VIH6TR achieves 480 MHz via its Arm Cortex-M7 core with dual-issue superscalar pipeline and integrated L1 cache (16 KB instruction + 16 KB data). This frequency requires proper voltage scaling (Range 0), stable 1.2 V core supply (via VCAP decoupling), and PLL configuration with HSE or HSI as source. Thermal derating applies above 85°C ambient.

Does this MCU support external SDRAM, and what interface is used?

Yes, it supports external SDRAM up to 100 MHz using the Flexible Memory Controller (FMC) with 32-bit data bus and dedicated SDRAM command signals (CK, CKE, CAS, RAS, WE). Configuration requires precise timing parameters from the SDRAM datasheet and initialization sequence via FMC registers before use.

How many independent power domains does the STM32H742VIH6TR have, and why does it matter?

It has three independent power domains: D1 (CPU/Cache), D2 (communication/peripheral timers), and D3 (reset/clock/power management). This enables selective clock gating and power-down-e.g., keeping D3 active for RTC while shutting down D1/D2 in Standby-to achieve ultra-low 2.95 µA current consumption without losing system state.

Is the LQFP100 package RoHS-compliant and lead-free?

Yes, the STM32H742VIH6TR in LQFP100 package is RoHS-compliant and lead-free, meeting EU Directive 2011/65/EU. It carries ST's ECOPACK2 certification, confirming compliance with environmental standards including halogen-free materials and strict heavy-metal limits.