STMicroelectronics STM32F439IIH6TR

Overview

STM32F439IIH6TR from STMicroelectronics is a 32-bit Arm® Cortex®-M4 MCU 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 STM32F439IIH6TR datasheet, STM32F439IIH6TR pinout, STM32F439IIH6TR application, or STM32F439IIH6TR equivalent, key selection considerations include LCD-TFT controller capability, dual USB OTG (FS/HS) with dedicated DMA, 10/100 Ethernet MAC with IEEE 1588v2 support, and cryptographic accelerator compatibility with TLS offload requirements.

Technical Context

The device integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 180 MHz, alongside a Chrom-ART Accelerator™ (DMA2D) for hardware-accelerated 2D graphics composition. Its memory subsystem includes dual-bank flash for read-while-write operation and flexible external memory controller supporting SDRAM, NOR, NAND, and PSRAM.

It implements two independent CAN 2.0B controllers, a parallel 8–14-bit DCMI interface (54 MB/s), and dual USB OTG PHYs - one full-speed on-chip, one high-speed with ULPI support - all managed via dedicated DMA channels to minimize CPU load during concurrent high-bandwidth peripheral operation.

Key Specifications

Pinout & Package

STM32F439IIH6TR uses a UFBGA176 (10 × 10 mm) package with 176 I/O balls, 166 of which are 5 V-tolerant, and supports up to 168 GPIOs with interrupt capability. Pin functions include dedicated LTDC data/control lines (LCD_R0–R7, LCD_G0–G7, LCD_B0–B7, LCD_HSYNC/VSYNC/DE/CLK), dual USB OTG PHY interfaces (ULPI and FS), and dual Ethernet MII/RMII signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F439IIH6TR, the STM32F769NIH6 trades LCD-TFT integration for higher FPU throughput and cache, while the STM32H743VIT6 shifts to dual-core architecture and MIPI DSI - making the F439 optimal for cost-sensitive, single-core designs requiring native RGB-TFT support without bridge components.

Availability

STM32F439IIH6TR is available at Aetrix Electronics and suitable for industrial HMI, medical imaging gateways, and smart building control systems requiring stable component supply across multi-year production cycles.

Supply support for STM32F439IIH6TR 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.

The STM32F4-series targets high-performance embedded applications demanding rich peripherals, real-time responsiveness, and hardware-accelerated graphics/crypto - optimized for human-machine interface, industrial connectivity, and vision-adjacent edge processing.

FAQ

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

The LTDC supports total display dimensions up to 4096 pixels wide and 2048 lines tall, with pixel clock up to 83 MHz. This enables native WQXGA (2560×1600) at 60 Hz or 4K-compatible timing with appropriate panel timing parameters configured in the LTDC registers.

Does STM32F439IIH6TR support hardware-accelerated SHA-256?

Yes - the integrated cryptographic processor supports SHA-1, SHA-224, SHA-256, MD5, HMAC-SHA, and AES-128/192/256 in hardware. SHA-256 computation is fully offloaded, achieving throughput >10 MB/s with minimal CPU intervention.

Can both USB OTG interfaces operate simultaneously?

Yes - the full-speed (FS) and high-speed (HS) USB OTG controllers are physically and logically independent, each with dedicated DMA channels and PHYs. They can run concurrently as host/device or dual-host, provided software manages resource arbitration and memory bandwidth.

What external memory types does the Flexible Memory Controller support?

The FMC supports SRAM, PSRAM, NOR flash, NAND flash, and SDRAM/LPSDR SDRAM with up to 32-bit data bus width. It includes dedicated timing registers per memory type and supports asynchronous/synchronous protocols with programmable wait states and burst modes.