STMicroelectronics STM32F439IIH7

Overview

STM32F439IIH7 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 180 MHz (225 DMIPS), featuring 2 MB flash, 256+4 KB SRAM (including 64 KB CCM), hardware crypto acceleration (AES-128/192/256, SHA-1/2, HMAC), and integrated LCD-TFT controller supporting up to 4096×2048 resolution at 83 MHz pixel clock - deployed in industrial HMI, medical imaging front-ends, and embedded vision gateways.

For engineers reviewing the STM32F439IIH7 datasheet, STM32F439IIH7 pinout, STM32F439IIH7 application, or STM32F439IIH7 equivalent, key selection criteria include LCD-TFT controller capability, dual USB OTG (FS + HS) with dedicated DMA, 10/100 Ethernet MAC with IEEE 1588v2 support, DCMI camera interface (54 MB/s), and cryptographic accelerator co-processor for secure boot and firmware signing.

Technical Context

The STM32F439IIH7 implements a dual-bank flash architecture enabling true read-while-write operation and supports ART Accelerator™ for zero-wait-state execution at 180 MHz. Its memory subsystem includes 64 KB core-coupled memory (CCM) for time-critical code/data and flexible external memory controller (FMC) supporting SDRAM, NOR, NAND, and PSRAM.

It integrates specialized peripherals not present in F437 variants: full LCD-TFT controller (LTDC) with layer blending, Chrom-ART Accelerator™ (DMA2D) for 2D graphics composition, and dual USB OTG controllers - one full-speed with on-chip PHY, one high-speed with ULPI interface and dedicated DMA - enabling simultaneous host/device roles in multi-interface systems.

Key Specifications

Pinout & Package

STM32F439IIH7 is housed in a 176-pin UFBGA package (10 × 10 mm, 0.8 mm pitch), with I/Os arranged in four sides for balanced PCB routing. The package supports 166 5 V-tolerant pins and features dedicated power/ground pairs for analog, digital, and I/O domains to minimize noise coupling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F439IIH7, the F769NIH6 trades DCMI for DSI and higher CPU performance, while the H743VIT6 abandons both LTDC and DCMI in favor of raw compute and memory bandwidth - making the F439IIH7 uniquely balanced for camera-driven, high-res display applications with cryptographic security.

Availability

STM32F439IIH7 is available at Aetrix Electronics and suitable for industrial HMI, medical imaging front-ends, smart building gateways, and test & measurement instruments requiring stable component supply across long-lifecycle deployments.

Supply support for STM32F439IIH7 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F4-series targets high-performance embedded applications demanding real-time responsiveness, rich connectivity, and hardware-accelerated graphics/crypto - specifically engineered for human-machine interfaces, industrial automation, and vision-enabled edge devices.

FAQ

What is the maximum resolution supported by the integrated LCD-TFT controller?

The STM32F439IIH7's LTDC supports total display resolutions up to 4096 pixels wide and 2048 lines tall, with pixel clock frequencies up to 83 MHz. This enables native driving of QXGA (2048×1536), WQXGA (2560×1600), and custom high-density panels without external timing controllers or FPGAs.

Does STM32F439IIH7 support hardware-accelerated cryptographic operations?

Yes - it integrates dedicated hardware accelerators for AES-128/192/256 encryption/decryption, triple DES, SHA-1/SHA-224/SHA-256 hashing, HMAC generation, and a true random number generator (TRNG). These accelerate TLS stack execution, secure boot verification, and firmware signature validation in under 10 µs per block.

Can STM32F439IIH7 interface directly with CMOS image sensors?

Yes - its 8–14-bit parallel Digital Camera Interface (DCMI) supports up to 54 MB/s throughput with programmable polarity, data alignment, and embedded sync signals (HSYNC/VSYNC/PCLK). It directly connects to common sensors like OV5640, AR0330, and MT9V034 without level shifters or bridge ICs.

What are the key differences between STM32F439IIH7 and STM32F437IIH7?

The STM32F439IIH7 adds the LCD-TFT controller (LTDC), Chrom-ART Accelerator (DMA2D), and enhanced USB OTG HS support compared to the F437IIH7. It also includes additional GPIOs mapped to LTDC/DCMI functions and updated silicon revision with improved thermal behavior - making it the only F4-series variant capable of native high-res parallel display driving.