STMicroelectronics STM32F4 series, 32-bit ARM Cortex-M4 single-core at 180 MHz, 2 MB Flash, 256 KB RAM, 140 I/O, Ethernet/USB OTG/CAN/SPI/I²C/UART, 1.8-3.6 V supply, -40°C to 85°C, 201-UFBGA tray package.
| Parameter | Value |
|---|---|
| Series | STM32F4 |
| Mounting | 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 | 201-UFBGA |
| Data converters | A/D 24x12b; D/A 2x12b |
| Program memory size | 2MB (2M x 8) |
The STM32F439IIH6: The 201-UFBGA package (176+25 balls, 10x10 mm body) is a fine-pitch BGA — the 0.5 mm ball pitch demands controlled impedance PCB routing and X-ray inspection post-reflow. The tray shipping medium means the parts arrive in a rigid carrier; plan for pick-and-place handling with a dedicated BGA nozzle.
The difference is the package. STM32F439IIH6 comes in a 201-UFBGA (176+25 balls, 10x10 mm), while STM32F439NIH6 uses a 216-TFBGA. Both carry the same core, memory, and peripheral set — the package choice drives PCB footprint and rework process, not functional capability.
Yes, the STM32F439IIH6 is pin-compatible with the STM32F429IIH6 in the same 201-UFBGA package. The F439 adds a hardware cryptographic accelerator and a true random number generator (TRNG) that the F429 lacks. If your firmware does not use those blocks, the F439 drops in as a direct replacement with no board change.