STMicroelectronics STM32F439IIT6

Overview

STM32F439IIT6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 MCU with FPU, operating at 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 STM32F439IIT6 datasheet, STM32F439IIT6 pinout, STM32F439IIT6 application, or STM32F439IIT6 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 acceleration for secure boot and data integrity.

Technical Context

The STM32F439IIT6 implements an adaptive real-time memory accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 180 MHz, paired with a Memory Protection Unit (MPU) and core-coupled memory (CCM) for deterministic real-time interrupt response. Its dual-bank flash architecture supports read-while-write operations critical for firmware over-the-air (FOTA) updates.

It integrates a dedicated LCD-TFT controller (LTDC) with programmable timing, Chrom-ART Accelerator™ (DMA2D) for hardware-accelerated 2D graphics composition, and a parallel camera interface (DCMI) capable of 54 MB/s throughput - distinguishing it from the STM32F437xx series which lacks LTDC and DMA2D.

Key Specifications

Pinout & Package

LQFP176 (24 × 24 mm) package with 168 I/O pins - 164 rated up to 90 MHz, 166 5 V-tolerant - compliant with ECOPACK2 environmental standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F439IIT6, the STM32F767IIT6 trades display integration for higher compute throughput and cache efficiency, while the STM32H743IIT6 delivers significantly greater processing headroom and security features at the cost of increased design complexity for display subsystems.

Availability

STM32F439IIT6 is available at Aetrix Electronics and suitable for industrial HMI, medical imaging front-ends, secure IoT gateways, and networked test equipment requiring stable component supply across multi-year production cycles.

Supply support for STM32F439IIT6 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 STM32F4-series targets high-performance embedded applications demanding real-time responsiveness, rich connectivity, and integrated peripherals - specifically optimized for human-machine interfaces, industrial control, and medical devices with graphical user interfaces.

FAQ

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

The STM32F439IIT6'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 support for WXGA (1280×800), SXGA (1280×1024), and custom high-resolution panels without external timing controllers.

Does the STM32F439IIT6 support hardware-accelerated graphics composition?

Yes - the Chrom-ART Accelerator (DMA2D) provides hardware-accelerated 2D graphics operations including memory copy, pixel format conversion, and alpha-blended layer composition. It operates independently of the CPU, reducing GUI rendering latency and freeing the Cortex-M4 core for application logic.

Can the STM32F439IIT6 perform simultaneous USB Full-Speed and High-Speed operations?

Yes - it integrates two independent USB OTG controllers: one with on-chip full-speed PHY (OTG_FS) and another supporting high-speed operation via ULPI interface (OTG_HS). Both have dedicated DMA channels, enabling concurrent device/host roles and bandwidth isolation between interfaces.

What cryptographic algorithms are implemented in hardware?

The STM32F439IIT6 includes dedicated hardware for AES-128/192/256 encryption/decryption, triple DES, hash functions (MD5, SHA-1, SHA-224/256), HMAC, and a true random number generator (RNG). These accelerate secure boot, TLS handshakes, and data-at-rest encryption without CPU overhead.