STM32F446ZET7 by STMicroelectronics — 180MHz ARM Cortex-M4 MCU 512KB Flash
STMicroelectronics STM32F4 series, 32-bit single-core ARM Cortex-M4 MCU at 180MHz, 512KB Flash, 128KB RAM, 114 I/O, 144-LQFP tray, -40 to 105°C operating temperature, 1.7 to 3.6V supply, dual CAN bus and USB OTG, 24-channel 12-bit ADC.
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Specifications
| Parameter | Value |
|---|---|
| Series | STM32F4 |
| Mounting type | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.7V ~ 3.6V |
| Operating temperature | -40°C~105°C(TA) |
| Speed | 180MHz |
| Package | Tray |
| RAM size | 128K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, I²S, LVD, POR, PWM, WDT |
| Connectivity | CANbus, EBI/EMI, I²C, IrDA, LINbus, SAI, SD, SPDIF-Rx, SPI, UART/USART, USB, USB OTG |
| Number of i (O) | 114 |
| Core processor | ARM® Cortex®-M4 |
| Case | 144-LQFP |
| Data converters | A/D 24x12b; D/A 2x12b |
| Program memory size | 512KB (512K x 8) |
Frequently asked questions
Does the STM32F446ZET7 have a second CAN controller built in, or do I need an external MCP2515?
Dual CAN is listed in the connectivity peripherals — no external CAN controller is required for a second CAN node. The integrated dual CAN bus handles primary CAN-FD and a secondary CAN channel simultaneously on-chip.
Will the STM32F446ZET7 drop into my existing 100-pin LQFP board layout?
No. The 144-LQFP package has 114 I/O on a 0.5 mm pitch over a 20 mm body. The 44 extra pins and wider footprint require a PCB respin and new harness — it is not mechanically or electrically compatible with the 100-pin layout used by parts like the STM32F103 family.
What voltage and supply conditions apply for 24V industrial rails?
The MCU operates at 1.7 to 3.6V; a regulated rail (typically 3.3V) is required between the 24V field supply and the Vdd pins. The integrated brown-out detect and LVD peripherals provide configurable reset thresholds suitable for monitoring the regulated 3.3V rail on a 24V industrial system.