STMicroelectronics STM32H742IIK6

Overview

STM32H742IIK6 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), dual CAN FD interfaces, and hardware JPEG codec. It integrates triple PLLs, LCD-TFT controller, and DFSDM for industrial HMI, motor control, and edge AI inference at the device level.

For engineers reviewing the STM32H742IIK6 datasheet, STM32H742IIK6 pinout, STM32H742IIK6 application, or STM32H742IIK6 equivalent, key selection criteria include dual-domain power management (D1/D2/D3), 16-bit ADC resolution with 3.6 MSPS sampling, Quad-SPI interface running at 133 MHz, and TFBGA176+25 package compatibility with high-density PCB layouts.

Technical Context

The STM32H742IIK6 implements a three-domain power architecture (D1 for CPU/flash, D2 for peripherals, D3 for reset/clock), enabling independent clock gating and voltage scaling across six configurable ranges. Its interconnect matrix comprises one AXI and two AHB bus matrices with five AHB2-APB bridges, supporting concurrent high-bandwidth data paths for DMA2D, MDMA, and Ethernet MAC.

It embeds three PLLs - one system PLL with fractional mode, plus two kernel PLLs - feeding clocks to the Cortex-M7 core, peripheral domains, and audio/video subsystems. The device supports true low-power operation with 2.95 µA Standby current (RTC/LSE active, Backup SRAM off) and VBAT battery charging capability.

Key Specifications

Pinout & Package

STM32H742IIK6 uses the TFBGA176+25 package (14 × 14 mm, 0.8 mm ball pitch), with 176 signal balls and 25 dedicated ground/power balls arranged in a 15 × 15 array (center balls omitted). Thermal pad exposed on underside for enhanced heat dissipation in high-performance applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H742IIK6, the STM32H743IIT6 adds analog and memory expansion at the cost of larger TFBGA240+25 packaging and higher BOM complexity, while the i.MX RT1176DVMAA trades integrated analog/peripheral depth for dual-core flexibility and external memory scalability.

Availability

STM32H742IIK6 is available at Aetrix Electronics and suitable for industrial HMI, motor control, edge vision, and secure gateway applications requiring stable component supply, long lifecycle assurance, and full ECOPACK2 compliance.

Supply support for STM32H742IIK6 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, specializing in microcontrollers, power management, sensors, and automotive ICs with vertical manufacturing capabilities.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, rich peripheral integration, and energy efficiency - designed specifically for industrial automation, medical imaging, and advanced human-machine interfaces.

FAQ

What is the maximum operating frequency of the STM32H742IIK6's Cortex-M7 core?

The STM32H742IIK6's Arm Cortex-M7 core operates at a maximum frequency of 480 MHz, validated across industrial temperature range (–40°C to +85°C) with full cache and FPU enabled. This frequency is sustained using the main PLL with HSE or HSI oscillator input, and requires proper VDD/VDDA regulation and VCAP capacitor placement per Section 6.3.2 of DS12110 Rev 11.

Does the STM32H742IIK6 support external SDRAM?

Yes - the STM32H742IIK6 integrates a Flexible Memory Controller (FMC) supporting SDRAM (including LPDDR/SDR), NOR/NAND flash, and PSRAM. It supports 16-bit or 32-bit data bus widths, with clock speeds up to 100 MHz in synchronous mode. Note that SDRAM initialization requires precise timing calibration via the FMC_BCR/FMC_BWTR registers and external termination resistors.

How many CAN FD interfaces does the STM32H742IIK6 provide?

The STM32H742IIK6 provides two fully independent CAN FD controllers compliant with ISO 11898-1:2015, each supporting bit rates up to 5 Mbps, payloads up to 64 bytes, and CRC-17 error detection. Both controllers support time-triggered communication (TT-CAN) mode and share no register overlap - enabling simultaneous CAN FD networks for redundancy or domain separation.

What is the purpose of the "+25" in the TFBGA176+25 package designation?

The "+25" denotes 25 dedicated ground and power balls (VSS/VDD) added to the standard 176-signal-ball TFBGA176 array, resulting in a 15×15 ball grid (225 total positions) with center balls omitted. These extra balls improve power integrity, reduce ground bounce, and support simultaneous switching noise (SSN) mitigation in high-speed 480 MHz operation - critical for EMI compliance in industrial environments.