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STMicroelectronics STM32F429IIT6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F429IIT6 STM32 MCU, 180MHz Cortex-M4, 2MB Flash

MPNSTM32F429IIT6
Active

STMicroelectronics STM32F4 series, STM32F429IIT6, ARM Cortex-M4 32-bit MCU, 180MHz, 2MB Flash, 256K x 8 SRAM, 140 I/O, Ethernet, LCD, 176-LQFP, -40 to 85°C.

$19.5800Ref. price · indicative, final on quote
STMicroelectronics STM32F429IIT6 datasheet (PDF)
Packaging176-LQFP
RoHSROHS3 Compliant
SeriesSTM32F4
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32F429IIT6 specifications
ParameterValue
SeriesSTM32F4
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.8V ~ 3.6V
Operating temperature-40°C ~ 85°C (TA)
Speed180MHz
PackageTray
RAM size256K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, I²S, LCD, POR, PWM, WDT
ConnectivityCANbus, EBI/EMI, Ethernet, I²C, IrDA, LINbus, SPI, UART/USART, USB OTG
Number of i (O)140
Core processorARM® Cortex®-M4
Case176-LQFP
Data convertersA/D 24x12b; D/A 2x12b
Program memory size2MB (2M x 8)

Product details

180 MHz Cortex-M4 with 2 MB Flash — what you get

Program memory is 2 MB of Flash, backed by 256K x 8 SRAM, and the part carries 140 GPIOs in a 176-LQFP package. Built-in peripherals include a TFT LCD controller, a full-speed Ethernet MAC with dedicated DMA, CANbus, multiple I²C and SPI ports, and two 12-bit DACs plus 24 12-bit ADC channels. This peripheral set targets human-machine interfaces (HMI), industrial gateways, and motor-control panels that need a display and wired networking on a single chip.

Ethernet on-chip — no external MAC needed

The Ethernet controller is a 10/100 MAC with dedicated DMA, which saves an external MAC-PHY bridge and reduces BOM cost for connected designs. The PHY interface is MII/RMII, so the board still needs an external PHY chip and magnetics, but the MAC integration cuts component count and simplifies the PCB layout.

ROHS3 compliant. For a production BOM, this means no last-time-buy scheduling and no forced redesign in the near term. The base product number is STM32F429, and the series (STM32F4) has broad ST support with multiple density and package options.

Frequently asked questions

Does the STM32F429IIT6 have an Ethernet controller?

Yes, it integrates a 10/100 Ethernet MAC with dedicated DMA. You still need an external PHY and magnetics, but the MAC is on-chip.

What is the maximum clock speed of the STM32F429IIT6?

The Cortex-M4 core runs at 180 MHz, with a hardware FPU and single-cycle multiply for DSP tasks.

What is the closest functional alternative to the STM32F429IIT6?

The STM32F429 sits in the high-performance STM32F4 line. A lower-power sibling, the STM32L151CBU6A (Cortex-M3 at 32 MHz), shares the ARM ecosystem but has far less Flash (128 KB), no Ethernet, and fewer I/O — it is not a pin-compatible drop-in. For a true second source, look at the STM32F407 series (same package options, similar peripherals but without the LCD controller).