STMicroelectronics STM32H735IGK6

Overview

STM32H735IGK6 from STMicroelectronics is a high-performance Arm® Cortex®-M7 32-bit microcontroller operating at up to 550 MHz, featuring 1 MB embedded flash with ECC, 564 KB SRAM (all with ECC), dual 16-bit ADCs delivering up to 3.6 MSPS, triple FD-CAN interfaces, and integrated Chrom-ART Accelerator for graphics acceleration. It targets industrial HMI, real-time motor control, and secure IoT edge nodes requiring deterministic execution and cryptographic integrity.

For engineers reviewing the STM32H735IGK6 datasheet, STM32H735IGK6 pinout, STM32H735IGK6 application, or STM32H735IGK6 equivalent, key selection considerations include its VFQFPN68 package, dual-core-ready memory architecture (TCM + system RAM), hardware crypto accelerators (AES-128/192/256, HASH, OTFDEC), and support for Ethernet MAC, USB HS/FS OTG, and LCD-TFT up to XGA resolution.

Technical Context

The STM32H735IGK6 implements a dual-bank Arm Cortex-M7 core with tightly coupled memory (TCM) and L1 cache (32 KB I-cache + 32 KB D-cache), enabling zero-wait-state execution from flash or external memory. Its memory subsystem includes 128 KB data TCM RAM for real-time data and up to 256 KB remappable instruction TCM RAM - critical for deterministic ISR latency in motor control and audio processing.

It integrates three FD-CAN controllers compliant with ISO 11898-1:2015, supporting bit rates up to 5 Mbps and protocol-level time-triggered (TT-CAN) operation on FDCAN1. The analog subsystem features two independent 16-bit ADCs with interleaved mode (7.2 MSPS combined), 2× operational amplifiers (GBW = 8 MHz), and 2× 12-bit DACs - all with ECC protection and low-power timer synchronization.

Key Specifications

Pinout & Package

STM32H735IGK6 is housed in a 68-pin Very Thin Quad Flat No-lead (VFQFPN) package with 8 mm × 8 mm body and 0.4 mm pitch. The exposed thermal pad enhances thermal dissipation for sustained 550 MHz operation under industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H735IGK6, the H743VIT6 trades FD-CAN for higher memory and display capability, while the H753IIK6 extends security beyond symmetric crypto to include PKA and hardened secure firmware upgrade - making it preferable for regulated medical or financial edge devices.

Availability

STM32H735IGK6 is available at Aetrix Electronics and suitable for industrial HMI, real-time motor control, secure edge gateways, and medical imaging front-ends requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STM32H735IGK6 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 delivers high-performance, secure, and energy-efficient MCUs targeting real-time industrial automation, AI-at-the-edge inference, and functional-safety-critical systems - with the H735 variant optimized for FD-CAN–centric automotive and industrial networking applications.

FAQ

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

The STM32H735IGK6 achieves 550 MHz via its Arm Cortex-M7 core with dual L1 caches (32 KB instruction + 32 KB data) and dynamic voltage/frequency scaling. It requires VDD ≥ 2.7 V and proper clock tree configuration using PLL1 with HSE or HSI as source. Thermal management via the VFQFPN68 exposed pad is essential to sustain this frequency in continuous operation.

Does STM32H735IGK6 support secure boot and firmware updates?

Yes. It includes a hardware-based secure boot ROM with SFI (Secure Firmware Install) and SB-SFU (Secure Boot and Secure Firmware Update) support. The bootloader validates signed firmware images using public-key cryptography, enforces memory isolation via MPU, and leverages ROP/PC-ROP to prevent code reuse attacks during update and runtime.

How many FD-CAN interfaces does STM32H735IGK6 have, and what protocols do they support?

It integrates three fully independent FD-CAN controllers (FDCAN1, FDCAN2, FDCAN3), each compliant with ISO 11898-1:2015. All support Classical CAN, CAN FD (up to 5 Mbps), and time-triggered communication (TT-CAN) on FDCAN1 - enabling use in automotive diagnostics, industrial gateways, and safety-critical networked systems.

What are the key differences between STM32H735IGK6 and STM32H743VIT6?

The STM32H735IGK6 offers triple FD-CAN, 1 MB flash, and 564 KB RAM in VFQFPN68, prioritizing automotive and industrial networking. The H743VIT6 provides 2 MB flash, 1 MB RAM, DSI host, and JPEG codec in LQFP100, but only standard CAN - making it better for display-intensive applications where FD-CAN is unnecessary.