STMicroelectronics STM32F439AIH6

Overview

STM32F439AIH6 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 and medical imaging front-ends.

For engineers reviewing the STM32F439AIH6 datasheet, STM32F439AIH6 pinout, STM32F439AIH6 application, or STM32F439AIH6 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, and cryptographic acceleration for secure boot and data integrity.

Technical Context

The STM32F439AIH6 implements an Arm Cortex-M4 core with floating-point unit and DSP extensions, paired with ST's Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 180 MHz. Its memory subsystem includes dual-bank flash (enabling read-while-write) and flexible external memory controller supporting SDRAM, NOR, NAND, and PSRAM.

It integrates a dedicated LCD-TFT controller (LTDC) with programmable timing, 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 - alongside a 10/100 Ethernet MAC with hardware timestamping per IEEE 1588v2.

Key Specifications

Pinout & Package

STM32F439AIH6 is housed in a UFBGA169 package (7 × 7 mm, 0.5 mm ball pitch), optimized for high-density PCB layouts and thermal performance in compact industrial and medical systems. Pin functions are validated per ST's DS9484 Rev 14 datasheet Section 4 ("Pinouts and pin description") and Table 10 ("STM32F437xx and STM32F439xx pin and ball definitions").

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F439ZIT6, the AIH6 offers superior thermal dissipation and board density in UFBGA169; versus STM32H743BIT6, it delivers proven, lower-risk integration for TFT-based HMIs without requiring new graphics middleware or higher-voltage power rails.

Availability

STM32F439AIH6 is available at Aetrix Electronics and suitable for industrial HMI, medical imaging front-ends, and secure IoT gateways requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STM32F439AIH6 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 devices for industrial, automotive, and consumer markets.

The STM32F4-series targets high-performance real-time embedded applications demanding rich connectivity, graphics, and security - with the F439 variant specifically engineered for display-intensive, crypto-aware systems.

FAQ

What is the maximum resolution supported by the LCD-TFT controller on STM32F439AIH6?

The 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 QXGA (2048×1536) or dual-HD (1920×1080 ×2) configurations. Actual achievable resolution depends on external memory bandwidth and panel timing constraints, not internal controller limits.

Does STM32F439AIH6 support hardware-accelerated SHA-256 and AES-256?

Yes - the integrated cryptographic processor supports AES-128/192/256 in ECB/CBC/CTR/GCM modes, SHA-1 and SHA-224/256 hashing, and HMAC-SHA256. Performance measurements in ST's AN4510 show SHA-256 throughput exceeding 100 Mbps and AES-256-GCM >180 Mbps at 180 MHz.

Can STM32F439AIH6 run USB High-Speed (480 Mbps) without an external PHY?

No - USB HS operation requires an external ULPI-compliant PHY (e.g., SMSC USB3343 or Microchip USB5744). The chip provides only the ULPI interface (8-bit parallel bus); the full-speed USB OTG has an integrated PHY, but HS does not.

What is the purpose of the VCAP1 and VCAP2 pins on STM32F439AIH6?

VCAP1 and VCAP2 connect to 2.2 µF ceramic decoupling capacitors for the internal 1.2 V voltage regulator. They stabilize core logic voltage under dynamic load; omitting or undersizing these capacitors causes erratic behavior or failure to boot. Both pins must be populated with identical low-ESR capacitors placed within 5 mm of their respective balls.