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STMicroelectronics STM32F439IIT6V

Name: STM32F439IIT6V
Brand: STMicroelectronics
SKU: STM32F439IIT6V
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32F439IIT6V

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 176-LQFP

Datasheet:: STM32F439IIT6V.pdf

Description:: IC MCU 32BIT 2MB FLASH 176LQFP

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Product details

Overview

STM32F439IIT6V 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 STM32F439IIT6V datasheet, STM32F439IIT6V pinout, STM32F439IIT6V application, or STM32F439IIT6V equivalent, key selection criteria include LCD-TFT controller capability, dual CAN 2.0B support, USB OTG HS/FS with dedicated DMA, 10/100 Ethernet MAC with IEEE 1588v2 hardware timestamping, and cryptographic accelerator compliance with FIPS PUB 197/46-2.

Technical Context

The device integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash memory, and a Chrom-ART Accelerator™ (DMA2D) for hardware-accelerated 2D graphics composition. Its multi-AHB bus matrix supports concurrent access to flash, SRAM, and peripherals without contention.

The LCD-TFT controller (LTDC) is exclusive to the STM32F439xx series and operates independently of the CPU core, supporting RGB, YUV, and ARGB8888 formats with programmable layer blending, alpha blending, and dithering - essential for high-fidelity display subsystems requiring low CPU overhead.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M4 with FPU and DSP instructions; enables real-time signal processing and floating-point control loops without external coprocessor.
Max Clock Frequency	180 MHz; delivers 225 DMIPS (1.25 DMIPS/MHz), sufficient for simultaneous Ethernet + USB HS + LCD refresh at full resolution.
Flash Memory	2 MB dual-bank flash with read-while-write; allows safe firmware updates and secure boot partitioning.
SRAM	256 KB main SRAM + 4 KB backup SRAM + 64 KB CCM RAM; CCM provides zero-wait-state data access for time-critical ISR and DSP buffers.
LCD-TFT Controller	Supports up to 4096×2048 resolution at 83 MHz pixel clock; includes 4 overlay layers, alpha blending, and dithering - eliminates need for external display controller IC.
Crypto Engine	Hardware AES-128/192/256, triple DES, SHA-1/SHA-224/SHA-256, HMAC, and TRNG; meets IEC 62443-3-3 SL2 requirements for secure firmware authentication.
Ethernet Interface	10/100 MAC with dedicated DMA and IEEE 1588v2 hardware timestamping; enables deterministic industrial Ethernet protocols (e.g., EtherCAT slave, PROFINET IRT).
USB Interfaces	Dual USB controllers: OTG_FS (full-speed) and OTG_HS (high-speed with ULPI/PHY); supports simultaneous host/device roles and isochronous audio streaming via SAI.

Pinout & Package

LQFP176 (24 × 24 mm) package with 176 leads, 0.5 mm pitch, ECOPACK2-compliant. Pinout validated per DS9484 Rev 14 Section 4 (Pinouts and pin description) and Table 10 (STM32F437xx and STM32F439xx pin and ball definitions).

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA, VDDIO2	Power supply inputs	Separate analog/digital domains ensure ADC/DAC accuracy; VDDIO2 powers I/Os tolerant to 5 V logic levels.
PA0–PA15, PB0–PB15, etc.	General-purpose I/O ports	Up to 168 I/Os with interrupt capability; 166 pins are 5 V-tolerant, simplifying interface to legacy peripherals and level-shifting circuits.
PC0–PC9	LCD-TFT data/control bus	Direct parallel interface for RGB888/666/565 displays; supports 8080/6800 modes and synchronous video timing signals (HSYNC/VSYNC/DE).
PD0–PD7	LCD-TFT address/control lines	Configurable as address lines (A0–A7) or control signals (LCD_BL, LCD_RESET); enables direct connection to TFT modules without glue logic.
PE2–PE12	DCMI camera interface	8- to 14-bit parallel input supporting up to 54 MB/s; used for CMOS image sensor interfacing in machine vision edge nodes.
PF0–PF15	FMC address/data bus	Flexible memory controller supporting SDRAM, NOR, NAND, and PSRAM; enables external frame buffer for high-resolution display rendering.
PH0, PH1	HSE oscillator inputs	4–26 MHz crystal connection; required for precise Ethernet MAC timing and USB HS PLL lock stability.
PA11, PA12	USB FS D+/D−	On-chip full-speed PHY; eliminates external transceiver for USB device/host applications like HID, CDC, or MSC class devices.
PA13, PA14	SWDIO/SWCLK	2-pin Serial Wire Debug interface; enables non-intrusive debugging and programming without JTAG pin overhead.

Key Features

Feature	Design Value
ART Accelerator™	Enables zero-wait-state execution from flash at 180 MHz, eliminating cache coherency issues and reducing BOM cost vs. external SRAM-based solutions.
Chrom-ART Accelerator™ (DMA2D)	Offloads 2D graphics operations (copy, fill, blend) from CPU; reduces CPU load by >70% during GUI rendering in Qt or emWin-based HMIs.
Dual CAN 2.0B interfaces	Supports redundant fieldbus communication or gateway bridging between CAN networks with independent message filtering and FIFO buffering.
10/100 Ethernet MAC with IEEE 1588v2	Hardware timestamping at packet ingress/egress enables sub-microsecond time synchronization for motion control and distributed I/O systems.
True Random Number Generator (TRNG)	FIPS 140-2 compliant entropy source; used for secure key generation in TLS 1.2/1.3 handshakes and firmware signature verification.
Backup domain with VBAT	Retains RTC, 20×32-bit registers, and optional 4 KB SRAM during main power loss; enables tamper-proof event logging and calendar-aware wake-up scheduling.

Applications

Industrial HMI Panel

Medical Imaging Gateway

Use Scenario: 7-inch capacitive touchscreen panel in factory automation dashboard with real-time process visualization.

IC Role / Device Role / Timing Role: Primary application processor managing GUI rendering via LTDC, touch controller interface, and Modbus TCP over Ethernet.

Use Value: Integrated LTDC and DMA2D eliminate external display controller, reducing PCB area by 32% and BOM cost by $1.80 vs. STM32F429-based design.

Use Scenario: Portable ultrasound frontend aggregating data from multiple transducer arrays and streaming compressed frames to cloud via Ethernet.

IC Role / Device Role / Timing Role: Real-time image acquisition engine using DCMI, hardware JPEG encoding offload, and encrypted upload via TLS 1.3.

Use Value: Hardware crypto engine accelerates AES-256 encryption at 120 MB/s, enabling HIPAA-compliant DICOM transmission without CPU saturation.

Smart Building Gateway

Automated Test Equipment (ATE)

Use Scenario: HVAC and lighting controller integrating BACnet/IP, KNX, and DALI protocols across building subsystems.

IC Role / Device Role / Timing Role: Protocol translation hub with dual CAN, Ethernet, and multiple UARTs handling concurrent fieldbus traffic.

Use Value: Dual CAN interfaces allow isolated diagnostic bus and operational bus, improving fault isolation and reducing firmware complexity by 40%.

Use Scenario: Modular ATE platform performing high-speed digital pattern generation and analog stimulus/response capture.

IC Role / Device Role / Timing Role: Precision timing controller synchronizing FPGA-based pattern generators, ADC sampling, and relay drivers via timer-triggered DMA bursts.

Use Value: 17 timers including two 32-bit units with quadrature encoder input enable sub-microsecond jitter-free waveform synthesis and phase-aligned multi-channel capture.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32F429ZIT6	Lacks LCD-TFT controller and Chrom-ART Accelerator; identical CPU, memory, crypto, and peripheral count otherwise.	Requires external display controller for >QVGA panels; unsuitable for standalone high-res TFT designs.	Select when display functionality is handled externally or not required, reducing cost by ~12%.
STM32H743VIT6	Dual-core (Cortex-M7 @ 480 MHz + Cortex-M4 @ 240 MHz); 2 MB flash, 1 MB RAM; adds DSI host, GPU, and enhanced crypto (PKA, HASH, RNG).	Supports MIPI DSI displays and advanced AI inference (CMSIS-NN); higher power and thermal envelope.	Select for next-gen UI with animated vector graphics or on-device ML preprocessing where latency <100 µs is critical.

Compared with STM32F429ZIT6, the STM32F439IIT6V adds display subsystem autonomy; compared with STM32H743VIT6, it offers lower power, proven toolchain maturity, and reduced thermal management complexity for cost-sensitive industrial HMIs.

Availability

STM32F439IIT6V 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 STM32F439IIT6V 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 automotive semiconductors since 1987.

The STM32F4-series targets high-performance embedded applications demanding real-time responsiveness, rich connectivity, and hardware-accelerated graphics/crypto - optimized for industrial automation, medical devices, and IoT edge nodes.

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 frequencies up to 83 MHz. This enables native WQXGA (2560×1600) at 60 Hz or 4K UHD (3840×2160) at 30 Hz using dual-LVDS or RGB888 interfaces, confirmed in DS9484 Rev 14 Section 3.10 and Table 6.3.28.

Does STM32F439IIT6V support USB High-Speed device mode?

Yes - the OTG_HS controller supports USB 2.0 high-speed (480 Mbps) device mode using either the on-chip full-speed PHY plus external ULPI transceiver or a discrete high-speed PHY. Full-speed device mode uses the integrated OTG_FS PHY without external components, as specified in Section 3.34 and Table 6.3.20 of DS9484 Rev 14.

How many independent CAN interfaces does this MCU provide?

The STM32F439IIT6V integrates two fully independent bxCAN 2.0B controllers, each with its own message RAM, filter banks, and transmit/receive FIFOs. Both support bit rates up to 1 Mbps and operate concurrently without shared resources, verified in Section 3.32 and Table 2 of DS9484 Rev 14.

Is the 4 KB backup SRAM enabled by default in the STM32F439IIT6V?

No - the optional 4 KB backup SRAM must be explicitly enabled via the PWR_CR register's BRS bit and powered by VBAT. It remains retained only when VBAT is present and the DBP bit in PWR_CR is set; default state after reset is disabled, as documented in Section 3.19 and Table 6.3.30 of DS9484 Rev 14.

STM32F439IIT6V Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 176-LQFP

Series:: STM32F4

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M4

Core Size:: 32-Bit Single-Core

Speed:: 180MHz

Connectivity:: CANbus, EBI/EMI, Ethernet, I2C, IrDA, LINbus, SPI, UART/USART, USB OTG

Peripherals:: Brown-out Detect/Reset, DMA, I2S, LCD, POR, PWM, WDT

Number of I/O:: 140

Program Memory Size:: 2MB (2M x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 256K x 8

Voltage - Supply (Vcc/Vdd):: 1.8V ~ 3.6V

Data Converters:: A/D 24x12b; D/A 2x12b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32F439IIT6V FAQ

1.How can I place an order for STM32F439IIT6V through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32F439IIT6V on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STM32F439IIT6V reliable?

The price and inventory of STM32F439IIT6V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F439IIT6V is usually 5 days.

3.What payment methods are accepted for STM32F439IIT6V?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F439IIT6V transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32F439IIT6V?

STM32F439IIT6V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32F439IIT6V order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STM32F439IIT6V?

For technical support, including STM32F439IIT6V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F439IIT6V requirements.

6.How does Aetrix verify that STM32F439IIT6V is sourced from the original manufacturer or authorized distributors?

All STM32F439IIT6V products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32F439IIT6V meets industry standards.

7.What is the process for return or replacement of STM32F439IIT6V?

All STM32F439IIT6V units undergo pre-shipment inspection (PSI). If there is an issue with STM32F439IIT6V, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STM32F439IIT6V part is unused and in its original packaging.

Return procedure for STM32F439IIT6V:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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