STM32F439IIT6V — STM32F4 180MHz ARM Cortex-M4 MCU, 2MB Flash, 176-LQFP
STMicroelectronics STM32F4 series, 32-bit ARM Cortex-M4 single-core MCU at 180MHz, 2MB Flash, 256KB SRAM, 140 I/O, Ethernet MAC, USB OTG, CAN, 24×12-bit ADC, 2×12-bit DAC, 176-LQFP tray package, -40°C to 85°C operating temperature, 1.8V to 3.6V supply.
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Specifications
| Parameter | Value |
|---|---|
| Series | STM32F4 |
| Mounting type | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.8V ~ 3.6V |
| Operating temperature | -40°C ~ 85°C (TA) |
| Speed | 180MHz |
| Package | Tray |
| RAM size | 256K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, I²S, LCD, POR, PWM, WDT |
| Connectivity | CANbus, EBI/EMI, Ethernet, I²C, IrDA, LINbus, SPI, UART/USART, USB OTG |
| Number of i (O) | 140 |
| Core processor | ARM® Cortex®-M4 |
| Case | 176-LQFP |
| Data converters | A/D 24x12b; D/A 2x12b |
| Program memory size | 2MB (2M x 8) |
Frequently asked questions
Does the 176-LQFP package match the footprint of the STM32F429ZI?
No. The STM32F439IIT6V uses a 176-lead LQFP (24×24mm, 1.0mm pitch) with 140 I/O — the STM32F429ZI is a 144-lead LQFP. These are different footprints requiring separate board layouts.
Does the STM32F439IIT6V support Profinet IRT natively?
The integrated Ethernet MAC handles the data link layer, but a physical PHY is required for any Ethernet connection. Profinet IRT protocol stack and real-time scheduling must be implemented in firmware or through ST middleware — the MAC hardware alone does not deliver the real-time protocol.
What is the thermal derating constraint at 85°C ambient with all peripherals active?
The part is rated to 85°C maximum ambient (TA). Sustained operation at 180MHz with 256KB SRAM active, 24 ADC channels sampling, and Ethernet MAC running will require junction-temperature analysis against the LQFP thermal resistance — the distributor listing gives package dimensions, not the junction-to-ambient thermal resistance. Confirm junction temperature stays below 125°C before committing this part to a safety-rated design.