# STM32F446ZET7

**STMicroelectronics** · Microcontrollers (MCU/MPU/SOC) · LQFP-144(20x20)

STM32F446ZET7 from STMicroelectronics, in a LQFP-144(20x20). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model, then checked against ST open pin data); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | PE2 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TRACECLK, SPI4_SCK, SAI1_MCLK_A, QUADSPI_BK1_IO2, FMC_A23, EVENTOUT. |
| 2 | PE3 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TRACED0, SAI1_SD_B, FMC_A19, EVENTOUT. |
| 3 | PE4 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TRACED1, SPI4_NSS, SAI1_FS_A, FMC_A20, DCMI_D4, EVENTOUT. |
| 4 | PE5 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TRACED2, TIM9_CH1, SPI4_MISO, SAI1_SCK_A, FMC_A21, DCMI_D6, EVENTOUT. |
| 5 | PE6 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TRACED3, TIM9_CH2, SPI4_MOSI, SAI1_SD_A, FMC_A22, DCMI_D7, EVENTOUT. |
| 6 | VBAT | power_in | Supply for the RTC, the 20x32-bit backup registers and the optional 4 KB backup SRAM (VBAT supply). |
| 7 | PC13 | bidirectional | 5 V-tolerant I/O (FT); alternate function: EVENTOUT; additional function: TAMP_1/WKUP1. |
| 8 | PC14-OSC32_IN | bidirectional | 5 V-tolerant I/O (FT); alternate function: EVENTOUT; additional function: OSC32_IN (32 kHz oscillator input for the RTC). |
| 9 | PC15-OSC32_OUT | bidirectional | 5 V-tolerant I/O (FT); alternate function: EVENTOUT; additional function: OSC32_OUT (32 kHz oscillator output for the RTC). |
| 10 | PF0 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: I2C2_SDA, FMC_A0, EVENTOUT. |
| 11 | PF1 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: I2C2_SCL, FMC_A1, EVENTOUT. |
| 12 | PF2 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: I2C2_SMBA, FMC_A2, EVENTOUT. |
| 13 | PF3 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMC_A3, EVENTOUT; additional function: ADC3_IN9. |
| 14 | PF4 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMC_A4, EVENTOUT; additional function: ADC3_IN14. |
| 15 | PF5 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMC_A5, EVENTOUT; additional function: ADC3_IN15. |
| 16 | VSS | power_in | Ground pin. |
| 17 | VDD | power_in | Digital supply pin; the application supply and I/Os range is 1.7 V to 3.6 V. |
| 18 | PF6 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM10_CH1, SAI1_SD_B, QUADSPI_BK1_IO3, EVENTOUT; additional function: ADC3_IN4. |
| 19 | PF7 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM11_CH1, SAI1_MCLK_B, QUADSPI_BK1_IO2, EVENTOUT; additional function: ADC3_IN5. |
| 20 | PF8 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SAI1_SCK_B, TIM13_CH1, QUADSPI_BK1_IO0, EVENTOUT; additional function: ADC3_IN6. |
| 21 | PF9 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SAI1_FS_B, TIM14_CH1, QUADSPI_BK1_IO1, EVENTOUT; additional function: ADC3_IN7. |
| 22 | PF10 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: DCMI_D11, EVENTOUT; additional function: ADC3_IN8. |
| 23 | PH0-OSC_IN | bidirectional | 5 V-tolerant I/O (FT); alternate function: EVENTOUT; additional function: OSC_IN (crystal oscillator input). |
| 24 | PH1-OSC_OUT | bidirectional | 5 V-tolerant I/O (FT); alternate function: EVENTOUT; additional function: OSC_OUT (crystal oscillator output). |
| 25 | NRST | bidirectional | Bidirectional reset pin with weak pull-up resistor (RST I/O structure). |
| 26 | PC0 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SAI1_MCLK_B, OTG_HS_ULPI_STP, FMC_SDNWE, EVENTOUT; additional function: ADC123_IN10. |
| 27 | PC1 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPI3_MOSI/I2S3_SD, SAI1_SD_A, SPI2_MOSI/I2S2_SD, EVENTOUT; additional function: ADC123_IN11. |
| 28 | PC2 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPI2_MISO, OTG_HS_ULPI_DIR, FMC_SDNE0, EVENTOUT; additional function: ADC123_IN12. |
| 29 | PC3 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPI2_MOSI/I2S2_SD, OTG_HS_ULPI_NXT, FMC_SDCKE0, EVENTOUT; additional function: ADC123_IN13. |
| 30 | VDD | power_in | Digital supply pin; the application supply and I/Os range is 1.7 V to 3.6 V. |
| 31 | VSSA | power_in | Analog ground pin. |
| 32 | VREF+ | power_in | Input voltage reference VREF+ for the ADC and DAC. |
| 33 | VDDA | power_in | Analog supply pin; no voltage range for this pin is given in the datasheet text provided. |
| 34 | PA0-WKUP | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM2_CH1/TIM2_ETR, TIM5_CH1, TIM8_ETR, USART2_CTS, UART4_TX, EVENTOUT; additional functions: ADC123_IN0, WKUP0/TAMP_2. |
| 35 | PA1 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM2_CH2, TIM5_CH2, USART2_RTS, UART4_RX, QUADSPI_BK1_IO3, SAI2_MCLK_B, EVENTOUT; additional function: ADC123_IN1. |
| 36 | PA2 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM2_CH3, TIM5_CH3, TIM9_CH1, USART2_TX, SAI2_SCK_B, EVENTOUT; additional function: ADC123_IN2. |
| 37 | PA3 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM2_CH4, TIM5_CH4, TIM9_CH2, SAI1_FS_A, USART2_RX, OTG_HS_ULPI_D0, EVENTOUT; additional function: ADC123_IN3. |
| 38 | VSS | power_in | Ground pin. |
| 39 | VDD | power_in | Digital supply pin; the application supply and I/Os range is 1.7 V to 3.6 V. |
| 40 | PA4 | bidirectional | 3.3 V-tolerant I/O (TTa) directly connected to the ADC; alternate functions: SPI1_NSS/I2S1_WS, SPI3_NSS/I2S3_WS, USART2_CK, OTG_HS_SOF, DCMI_HSYNC, EVENTOUT; additional functions: ADC12_IN4, DAC_OUT1. |
| 41 | PA5 | bidirectional | 3.3 V-tolerant I/O (TTa) directly connected to the ADC; alternate functions: TIM2_CH1/TIM2_ETR, TIM8_CH1N, SPI1_SCK/I2S1_CK, OTG_HS_ULPI_CK, EVENTOUT; additional functions: ADC12_IN5, DAC_OUT2. |
| 42 | PA6 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_BKIN, TIM3_CH1, TIM8_BKIN, SPI1_MISO, I2S2_MCK, TIM13_CH1, DCMI_PIXCLK, EVENTOUT; additional function: ADC12_IN6. |
| 43 | PA7 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH1N, TIM3_CH2, TIM8_CH1N, SPI1_MOSI/I2S1_SD, TIM14_CH1, FMC_SDNWE, EVENTOUT; additional function: ADC12_IN7. |
| 44 | PC4 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: I2S1_MCK, SPDIFRX_IN2, FMC_SDNE0, EVENTOUT; additional function: ADC12_IN14. |
| 45 | PC5 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: USART3_RX, SPDIFRX_IN3, FMC_SDCKE0, EVENTOUT; additional function: ADC12_IN15. |
| 46 | PB0 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH2N, TIM3_CH3, TIM8_CH2N, SPI3_MOSI/I2S3_SD, UART4_CTS, OTG_HS_ULPI_D1, SDIO_D1, EVENTOUT; additional function: ADC12_IN8. |
| 47 | PB1 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH3N, TIM3_CH4, TIM8_CH3N, OTG_HS_ULPI_D2, SDIO_D2, EVENTOUT; additional function: ADC12_IN9. |
| 48 | PB2-BOOT1 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM2_CH4, SAI1_SD_A, SPI3_MOSI/I2S3_SD, QUADSPI_CLK, OTG_HS_ULPI_D4, SDIO_CK, EVENTOUT; BOOT1 is the function of this pin after reset-option configuration as printed in the table. |
| 49 | PF11 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SAI2_SD_B, FMC_SDNRAS, DCMI_D12, EVENTOUT. |
| 50 | PF12 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMC_A6, EVENTOUT. |
| 51 | VSS | power_in | Ground pin. |
| 52 | VDD | power_in | Digital supply pin; the application supply and I/Os range is 1.7 V to 3.6 V. |
| 53 | PF13 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMPI2C1_SMBA, FMC_A7, EVENTOUT. |
| 54 | PF14 | bidirectional | 5 V-tolerant I/O with I2C FM+ option (FTf); alternate functions: FMPI2C1_SCL, FMC_A8, EVENTOUT. |
| 55 | PF15 | bidirectional | 5 V-tolerant I/O with I2C FM+ option (FTf); alternate functions: FMPI2C1_SDA, FMC_A9, EVENTOUT. |
| 56 | PG0 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMC_A10, EVENTOUT. |
| 57 | PG1 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMC_A11, EVENTOUT. |
| 58 | PE7 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_ETR, UART5_RX, QUADSPI_BK2_IO0, FMC_D4, EVENTOUT. |
| 59 | PE8 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH1N, UART5_TX, QUADSPI_BK2_IO1, FMC_D5, EVENTOUT. |
| 60 | PE9 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH1, QUADSPI_BK2_IO2, FMC_D6, EVENTOUT. |
| 61 | VSS | power_in | Ground pin. |
| 62 | VDD | power_in | Digital supply pin; the application supply and I/Os range is 1.7 V to 3.6 V. |
| 63 | PE10 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH2N, QUADSPI_BK2_IO3, FMC_D7, EVENTOUT. |
| 64 | PE11 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH2, SPI4_NSS, SAI2_SD_B, FMC_D8, EVENTOUT. |
| 65 | PE12 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH3N, SPI4_SCK, SAI2_SCK_B, FMC_D9, EVENTOUT. |
| 66 | PE13 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH3, SPI4_MISO, SAI2_FS_B, FMC_D10, EVENTOUT. |
| 67 | PE14 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH4, SPI4_MOSI, SAI2_MCLK_B, FMC_D11, EVENTOUT. |
| 68 | PE15 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_BKIN, FMC_D12, EVENTOUT. |
| 69 | PB10 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM2_CH3, I2C2_SCL, SPI2_SCK/I2S2_CK, SAI1_SCK_A, USART3_TX, OTG_HS_ULPI_D3, EVENTOUT. |
| 70 | PB11 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM2_CH4, I2C2_SDA, USART3_RX, SAI2_SD_A, EVENTOUT. |
| 71 | VCAP_1 | power_in | Voltage regulator external capacitor connection (VCAP_1), see the VCAP_1/VCAP_2 external capacitor conditions. |
| 72 | VDD | power_in | Digital supply pin; the application supply and I/Os range is 1.7 V to 3.6 V. |
| 73 | PB12 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_BKIN, I2C2_SMBA, SPI2_NSS/I2S2_WS, SAI1_SCK_B, USART3_CK, CAN2_RX, OTG_HS_ULPI_D5, OTG_HS_ID, EVENTOUT. |
| 74 | PB13 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH1N, SPI2_SCK/I2S2_CK, USART3_CTS, CAN2_TX, OTG_HS_ULPI_D6, EVENTOUT; additional function: OTG_HS_VBUS. |
| 75 | PB14 | bidirectional | 5 V-tolerant I/O (FT) supplied by VDDUSB; alternate functions: TIM1_CH2N, TIM8_CH2N, SPI2_MISO, USART3_RTS, TIM12_CH1, OTG_HS_DM, EVENTOUT. |
| 76 | PB15 | bidirectional | 5 V-tolerant I/O (FT) supplied by VDDUSB; alternate functions: RTC_REFIN, TIM1_CH3N, TIM8_CH3N, SPI2_MOSI/I2S2_SD, TIM12_CH2, OTG_HS_DP, EVENTOUT. |
| 77 | PD8 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: USART3_TX, SPDIFRX_IN1, FMC_D13, EVENTOUT. |
| 78 | PD9 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: USART3_RX, FMC_D14, EVENTOUT. |
| 79 | PD10 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: USART3_CK, FMC_D15, EVENTOUT. |
| 80 | PD11 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMPI2C1_SMBA, USART3_CTS, QUADSPI_BK1_IO0, SAI2_SD_A, FMC_A16, EVENTOUT. |
| 81 | PD12 | bidirectional | 5 V-tolerant I/O with I2C FM+ option (FTf); alternate functions: TIM4_CH1, FMPI2C1_SCL, USART3_RTS, QUADSPI_BK1_IO1, SAI2_FS_A, FMC_A17, EVENTOUT. |
| 82 | PD13 | bidirectional | 5 V-tolerant I/O with I2C FM+ option (FTf); alternate functions: TIM4_CH2, FMPI2C1_SDA, QUADSPI_BK1_IO3, SAI2_SCK_A, FMC_A18, EVENTOUT. |
| 83 | VSS | power_in | Ground pin. |
| 84 | VDD | power_in | Digital supply pin; the application supply and I/Os range is 1.7 V to 3.6 V. |
| 85 | PD14 | bidirectional | 5 V-tolerant I/O with I2C FM+ option (FTf); alternate functions: TIM4_CH3, FMPI2C1_SCL, SAI2_SCK_A, FMC_D0, EVENTOUT. |
| 86 | PD15 | bidirectional | 5 V-tolerant I/O with I2C FM+ option (FTf); alternate functions: TIM4_CH4, FMPI2C1_SDA, FMC_D1, EVENTOUT. |
| 87 | PG2 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMC_A12, EVENTOUT. |
| 88 | PG3 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMC_A13, EVENTOUT. |
| 89 | PG4 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMC_A14/FMC_BA0, EVENTOUT. |
| 90 | PG5 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMC_A15/FMC_BA1, EVENTOUT. |
| 91 | PG6 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: QUADSPI_BK1_NCS, DCMI_D12, EVENTOUT. |
| 92 | PG7 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: USART6_CK, FMC_INT, DCMI_D13, EVENTOUT. |
| 93 | PG8 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPDIFRX_IN2, USART6_RTS, FMC_SDCLK, EVENTOUT. |
| 94 | VSS | power_in | Ground pin. |
| 95 | VDDUSB | power_in | Dedicated USB power rail enabling the on-chip USB PHYs to operate across the entire MCU supply range; also supplies PA11, PA12, PB14 and PB15. |
| 96 | PC6 | bidirectional | 5 V-tolerant I/O with I2C FM+ option (FTf); alternate functions: TIM3_CH1, TIM8_CH1, FMPI2C1_SCL, I2S2_MCK, USART6_TX, SDIO_D6, DCMI_D0, EVENTOUT. |
| 97 | PC7 | bidirectional | 5 V-tolerant I/O with I2C FM+ option (FTf); alternate functions: TIM3_CH2, TIM8_CH2, FMPI2C1_SDA, SPI2_SCK/I2S2_CK, I2S3_MCK, SPDIFRX_IN1, USART6_RX, SDIO_D7, DCMI_D1, EVENTOUT. |
| 98 | PC8 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TRACED0, TIM3_CH3, TIM8_CH3, UART5_RTS, USART6_CK, SDIO_D0, DCMI_D2, EVENTOUT. |
| 99 | PC9 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: MCO2, TIM3_CH4, TIM8_CH4, I2C3_SDA, I2S_CKIN, UART5_CTS, QUADSPI_BK1_IO0, SDIO_D1, DCMI_D3, EVENTOUT. |
| 100 | PA8 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: MCO1, TIM1_CH1, I2C3_SCL, USART1_CK, OTG_FS_SOF, EVENTOUT. |
| 101 | PA9 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH2, I2C3_SMBA, SPI2_SCK/I2S2_CK, SAI1_SD_B, USART1_TX, DCMI_D0, EVENTOUT; additional function: OTG_FS_VBUS. |
| 102 | PA10 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM1_CH3, USART1_RX, OTG_FS_ID, DCMI_D1, EVENTOUT. |
| 103 | PA11 | bidirectional | 5 V-tolerant I/O (FT) supplied by VDDUSB; alternate functions: TIM1_CH4, USART1_CTS, CAN1_RX, OTG_FS_DM, EVENTOUT. |
| 104 | PA12 | bidirectional | 5 V-tolerant I/O (FT) supplied by VDDUSB; alternate functions: TIM1_ETR, USART1_RTS, SAI2_FS_B, CAN1_TX, OTG_FS_DP, EVENTOUT. |
| 105 | PA13 | bidirectional | 5 V-tolerant I/O (FT); alternate function: JTMS-SWDIO (SWD data I/O, shared with JTAG TMS), EVENTOUT. |
| 106 | VCAP_2 | power_in | Voltage regulator external capacitor connection (VCAP_2), see the VCAP_1/VCAP_2 external capacitor conditions. |
| 107 | VSS | power_in | Ground pin. |
| 108 | VDD | power_in | Digital supply pin; the application supply and I/Os range is 1.7 V to 3.6 V. |
| 109 | PA14 | bidirectional | 5 V-tolerant I/O (FT); alternate function: JTCK-SWCLK (SWD clock, shared with JTAG TCK), EVENTOUT. |
| 110 | PA15 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: JTDI, TIM2_CH1/TIM2_ETR, HDMI_CEC, SPI1_NSS/I2S1_WS, SPI3_NSS/I2S3_WS, UART4_RTS, EVENTOUT. |
| 111 | PC10 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPI3_SCK/I2S3_CK, USART3_TX, UART4_TX, QUADSPI_BK1_IO1, SDIO_D2, DCMI_D8, EVENTOUT. |
| 112 | PC11 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPI3_MISO, USART3_RX, UART4_RX, QUADSPI_BK2_NCS, SDIO_D3, DCMI_D4, EVENTOUT. |
| 113 | PC12 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: I2C2_SDA, SPI3_MOSI/I2S3_SD, USART3_CK, UART5_TX, SDIO_CK, DCMI_D9, EVENTOUT. |
| 114 | PD0 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPI4_MISO, SPI3_MOSI/I2S3_SD, CAN1_RX, FMC_D2, EVENTOUT. |
| 115 | PD1 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPI2_NSS/I2S2_WS, CAN1_TX, FMC_D3, EVENTOUT. |
| 116 | PD2 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM3_ETR, UART5_RX, SDIO_CMD, DCMI_D11, EVENTOUT. |
| 117 | PD3 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TRACED1, SPI2_SCK/I2S2_CK, USART2_CTS, QUADSPI_CLK, FMC_CLK, DCMI_D5, EVENTOUT. |
| 118 | PD4 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: USART2_RTS, FMC_NOE, EVENTOUT. |
| 119 | PD5 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: USART2_TX, FMC_NWE, EVENTOUT. |
| 120 | VSS | power_in | Ground pin. |
| 121 | VDD | power_in | Digital supply pin; the application supply and I/Os range is 1.7 V to 3.6 V. |
| 122 | PD6 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPI3_MOSI/I2S3_SD, SAI1_SD_A, USART2_RX, FMC_NWAIT, DCMI_D10, EVENTOUT. |
| 123 | PD7 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: USART2_CK, SPDIFRX_IN0, FMC_NE1, EVENTOUT. |
| 124 | PG9 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPDIFRX_IN3, USART6_RX, QUADSPI_BK2_IO2, SAI2_FS_B, FMC_NE2/FMC_NCE3, DCMI_VSYNC (silicon revision 3 only), EVENTOUT. |
| 125 | PG10 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SAI2_SD_B, FMC_NE3, DCMI_D2, EVENTOUT. |
| 126 | PG11 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPI4_SCK, SPDIFRX_IN0, DCMI_D3, EVENTOUT. |
| 127 | PG12 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: SPI4_MISO, SPDIFRX_IN1, USART6_RTS, FMC_NE4, EVENTOUT. |
| 128 | PG13 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TRACED2, SPI4_MOSI, USART6_CTS, FMC_A24, EVENTOUT. |
| 129 | PG14 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TRACED3, SPI4_NSS, USART6_TX, QUADSPI_BK2_IO3, FMC_A25, EVENTOUT. |
| 130 | VSS | power_in | Ground pin. |
| 131 | VDD | power_in | Digital supply pin; the application supply and I/Os range is 1.7 V to 3.6 V. |
| 132 | PG15 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: USART6_CTS, FMC_SDNCAS, DCMI_D13, EVENTOUT. |
| 133 | PB3-JTDO/TRACESWO | bidirectional | 5 V-tolerant I/O (FT); alternate function: JTDO/TRACESWO (JTAG output / trace SWO), TIM2_CH2, I2C2_SDA, SPI1_SCK/I2S1_CK, SPI3_SCK/I2S3_CK, EVENTOUT. |
| 134 | PB4(NJTRST) | bidirectional | 5 V-tolerant I/O (FT); alternate functions: NJTRST (JTAG reset, active low), TIM3_CH1, I2C3_SDA, SPI1_MISO, SPI3_MISO, SPI2_NSS/I2S2_WS, EVENTOUT. |
| 135 | PB5 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM3_CH2, I2C1_SMBA, SPI1_MOSI/I2S1_SD, SPI3_MOSI/I2S3_SD, CAN2_RX, OTG_HS_ULPI_D7, FMC_SDCKE1, DCMI_D10, EVENTOUT. |
| 136 | PB6 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM4_CH1, HDMI_CEC, I2C1_SCL, USART1_TX, CAN2_TX, QUADSPI_BK1_NCS, FMC_SDNE1, DCMI_D5, EVENTOUT. |
| 137 | PB7 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM4_CH2, I2C1_SDA, USART1_RX, SPDIFRX_IN0, FMC_NL, DCMI_VSYNC, EVENTOUT. |
| 138 | BOOT0 | input | Dedicated BOOT0 input-only pin (B structure) with VPP as its listed function. |
| 139 | PB8 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM2_CH1/TIM2_ETR, TIM4_CH3, TIM10_CH1, I2C1_SCL, CAN1_RX, SDIO_D4, DCMI_D6, EVENTOUT. |
| 140 | PB9 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM2_CH2, TIM4_CH4, TIM11_CH1, I2C1_SDA, SPI2_NSS/I2S2_WS, SAI1_FS_B, CAN1_TX, SDIO_D5, DCMI_D7, EVENTOUT. |
| 141 | PE0 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: TIM4_ETR, SAI2_MCLK_A, FMC_NBL0, DCMI_D2, EVENTOUT. |
| 142 | PE1 | bidirectional | 5 V-tolerant I/O (FT); alternate functions: FMC_NBL1, DCMI_D3, EVENTOUT. |
| 143 | PDR_ON | power_in | Supply-type pin (S) listed in Table 10; its power-down reset function is described in the power supply supervisor section, which is not in this excerpt. |
| 144 | VDD | power_in | Digital supply pin; the application supply and I/Os range is 1.7 V to 3.6 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | LQFP-144(20x20) |
| Category | Embedded Processors & Controllers |
| Pins | 144 |

## CAD (KiCad official)

- Symbol: `STM32F446ZET7`
- Footprint: `Package_QFP:LQFP-144_20x20mm_P0.5mm`
- 3D model: LQFP-144(20x20) (KiCad packages3D, STEP)
- 3D model files: `stm32f446zet7-etched.step` / `stm32f446zet7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stm32f446zet7.step` / `stm32f446zet7.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590916625695141888) (198 pp, sha256 `3902cf9f939a0ef6`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/stm32f446zet7-datasheet.pdf)