STM32F303ZET6

{
  "slug": "stm32f303zet6",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-144(20x20). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32f303zet6",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32f303zet6.kicad_sym",
    "stm32f303zet6.kicad_mod",
    "stm32f303zet6.glb",
    "stm32f303zet6.step",
    "stm32f303zet6.lbr",
    "docs/hero.png",
    "docs/stm32f303zet6-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stm32f303zet6-hero.glb",
    "stm32f303zet6-hero.overlay.json"
  ],
  "component": {
    "mpn": "STM32F303ZET6",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-144(20x20)",
    "pin_count": 144,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586180216440172544",
    "parts": {
      "symbol": "stm32f303zet6.kicad_sym",
      "footprint": "stm32f303zet6.kicad_mod",
      "model_3d": "stm32f303zet6-hero.glb",
      "model_3d_plain": "stm32f303zet6.glb",
      "model_3d_step": "stm32f303zet6-etched.step",
      "model_3d_step_plain": "stm32f303zet6.step",
      "lbr": "stm32f303zet6.lbr"
    },
    "distributor_links": {
      "lcsc": "C88450",
      "digikey": "497-15165-ND",
      "mouser": "511-STM32F303ZET6"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T13:39:33Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-15165-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32F303ZET6",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PE2",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions TRACECK, EVENTOUT, TIM3_CH1, TSC_G7_IO1, SPI4_SCK, TIM20_CH1, FMC_A23."
      },
      {
        "number": "2",
        "name": "PE3",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions TRACED0, EVENTOUT, TIM3_CH2, TSC_G7_IO2, SPI4_NSS, TIM20_CH2, FMC_A19."
      },
      {
        "number": "3",
        "name": "PE4",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions TRACED1, EVENTOUT, TIM3_CH3, TSC_G7_IO3, SPI4_NSS, TIM20_CH1N, FMC_A20."
      },
      {
        "number": "4",
        "name": "PE5",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions TRACED2, EVENTOUT, TIM3_CH4, TSC_G7_IO4, SPI4_MISO, TIM20_CH2N, FMC_A21."
      },
      {
        "number": "5",
        "name": "PE6",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions TRACED3, EVENTOUT, SPI4_MOSI, TIM20_CH3N, FMC_A22; additional functions WKUP3, RTC_TAMP3."
      },
      {
        "number": "6",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup power supply pin for the RTC and backup registers."
      },
      {
        "number": "7",
        "name": "PC13",
        "type": "bidirectional",
        "description": "Standard 3.3 V I/O (TC) supplied through the power switch, which sinks only 3 mA, so output speed must not exceed 2 MHz with a 30 pF load and the pin must not source current such as an LED; alternate functions EVENTOUT, TIM1_CH1N; additional functions WKUP2, RTC_TAMP1, RTC_TS, RTC_OUT."
      },
      {
        "number": "8",
        "name": "PC14",
        "type": "bidirectional",
        "description": "Standard 3.3 V I/O (TC) supplied through the power switch (3 mA limit), so output speed must not exceed 2 MHz with a 30 pF load and it must not be used as a current source; alternate function EVENTOUT; additional function OSC32_IN."
      },
      {
        "number": "9",
        "name": "PC15",
        "type": "bidirectional",
        "description": "Standard 3.3 V I/O (TC) supplied through the power switch (3 mA limit), so output speed must not exceed 2 MHz with a 30 pF load and it must not be used as a current source; alternate function EVENTOUT; additional function OSC32_OUT."
      },
      {
        "number": "10",
        "name": "PH0",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_CH1, FMC_A0."
      },
      {
        "number": "11",
        "name": "PH1",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_CH2, FMC_A1."
      },
      {
        "number": "12",
        "name": "PF2",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM20_CH3, FMC_A2; additional function ADC12_IN10."
      },
      {
        "number": "13",
        "name": "PF3",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_CH4, FMC_A3."
      },
      {
        "number": "14",
        "name": "PF4",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, COMP1_OUT, TIM20_CH1N, FMC_A4; additional function ADC1_IN5 (fast ADC channel)."
      },
      {
        "number": "15",
        "name": "PF5",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_CH2N, FMC_A5."
      },
      {
        "number": "16",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin."
      },
      {
        "number": "17",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; VDD voltage range is 2.0 V to 3.6 V."
      },
      {
        "number": "18",
        "name": "PF6",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions EVENTOUT, TIM4_CH4, I2C2_SCL, USART3_RTS, FMC_NIORD."
      },
      {
        "number": "19",
        "name": "PF7",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_BKIN, FMC_NREG."
      },
      {
        "number": "20",
        "name": "PF8",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_BKIN2, FMC_NIOWR."
      },
      {
        "number": "21",
        "name": "PF9",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_BKIN, TIM15_CH1, SPI2_SCK, FMC_CD."
      },
      {
        "number": "22",
        "name": "PF10",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_BKIN2, TIM15_CH2, SPI2_SCK, FMC_INTR."
      },
      {
        "number": "23",
        "name": "PF0-OSC_IN",
        "type": "input",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf) listed as input; alternate functions EVENTOUT, I2C2_SDA, SPI2_NSS/I2S2_WS, TIM1_CH3N; additional function OSC_IN (external oscillator input)."
      },
      {
        "number": "24",
        "name": "PF1-OSC_OUT",
        "type": "output",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf) listed as output; alternate functions EVENTOUT, I2C2_SCL, SPI2_SCK/I2S2_CK; additional function OSC_OUT (external oscillator output)."
      },
      {
        "number": "25",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with embedded weak pull-up resistor; device reset input and internal reset output, active low."
      },
      {
        "number": "26",
        "name": "PC0",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_CH1; additional functions ADC12_IN6, COMP7_INM."
      },
      {
        "number": "27",
        "name": "PC1",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_CH2; additional functions ADC12_IN7, COMP7_INP."
      },
      {
        "number": "28",
        "name": "PC2",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_CH3, COMP7_OUT; additional function ADC12_IN8."
      },
      {
        "number": "29",
        "name": "PC3",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_CH4, TIM1_BKIN2; additional function ADC12_IN9."
      },
      {
        "number": "30",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground pin."
      },
      {
        "number": "31",
        "name": "VREF-",
        "type": "power_in",
        "description": "Negative reference voltage pin for the ADC, which can be internally connected to VSSA depending on the package."
      },
      {
        "number": "32",
        "name": "VREF+",
        "type": "power_in",
        "description": "Positive reference voltage pin for the ADC; the ADC characteristics specify VREF+ from 2 V to VDDA."
      },
      {
        "number": "33",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply pin; VDDA voltage range is 2.0 V to 3.6 V."
      },
      {
        "number": "34",
        "name": "PA0",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions TIM2_CH1/TIM2_ETR, TSC_G1_IO1, USART2_CTS, COMP1_OUT, TIM8_BKIN, TIM8_ETR, EVENTOUT; additional functions ADC1_IN1 (fast ADC channel), COMP1_INM, RTC_TAMP2, WKUP1."
      },
      {
        "number": "35",
        "name": "PA1",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions RTC_REFIN, TIM2_CH2, TSC_G1_IO2, USART2_RTS, TIM15_CH1N, EVENTOUT; additional functions ADC1_IN2 (fast ADC channel), COMP1_INP, OPAMP1_VINP, OPAMP3_VINP."
      },
      {
        "number": "36",
        "name": "PA2",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa) with reduced touch sensing sensitivity, recommended as sampling capacitor I/O; alternate functions TIM2_CH3, TSC_G1_IO3, USART2_TX, COMP2_OUT, TIM15_CH1, EVENTOUT; additional functions ADC1_IN3 (fast ADC channel), COMP2_INM, OPAMP1_VOUT."
      },
      {
        "number": "37",
        "name": "PA3",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions TIM2_CH4, TSC_G1_IO4, USART2_RX, TIM15_CH2, EVENTOUT; additional functions ADC1_IN4 (fast ADC channel), OPAMP1_VINM, OPAMP1_VINP."
      },
      {
        "number": "38",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin."
      },
      {
        "number": "39",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; VDD voltage range is 2.0 V to 3.6 V."
      },
      {
        "number": "40",
        "name": "PA4",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa) with reduced touch sensing sensitivity, recommended as sampling capacitor I/O; alternate functions TIM3_CH2, TSC_G2_IO1, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_CK, EVENTOUT; additional functions ADC2_IN1 (fast ADC channel), DAC1_OUT1, COMP1_INM to COMP7_INM, OPAMP4_VINP."
      },
      {
        "number": "41",
        "name": "PA5",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa) with reduced touch sensing sensitivity, recommended as sampling capacitor I/O; alternate functions TIM2_CH1/TIM2_ETR, TSC_G2_IO2, SPI1_SCK, EVENTOUT; additional functions ADC2_IN2 (fast ADC channel), DAC1_OUT2, COMP1_INM to COMP7_INM, OPAMP1_VINP, OPAMP2_VINM, OPAMP3_VINP."
      },
      {
        "number": "42",
        "name": "PA6",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa) with reduced touch sensing sensitivity, recommended as sampling capacitor I/O; alternate functions TIM16_CH1, TIM3_CH1, TSC_G2_IO3, TIM8_BKIN, SPI1_MISO, TIM1_BKIN, COMP1_OUT, EVENTOUT; additional functions ADC2_IN3 (fast ADC channel), OPAMP2_VOUT."
      },
      {
        "number": "43",
        "name": "PA7",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions TIM17_CH1, TIM3_CH2, TSC_G2_IO4, TIM8_CH1N, SPI1_MOSI, TIM1_CH1N, EVENTOUT; additional functions ADC2_IN4 (fast ADC channel), COMP2_INP, OPAMP1_VINP, OPAMP2_VINP."
      },
      {
        "number": "44",
        "name": "PC4",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_ETR, USART1_TX; additional function ADC2_IN5 (fast ADC channel)."
      },
      {
        "number": "45",
        "name": "PC5",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM15_BKIN, TSC_G3_IO1, USART1_RX; additional functions ADC2_IN11, OPAMP1_VINM, OPAMP2_VINM."
      },
      {
        "number": "46",
        "name": "PB0",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions TIM3_CH3, TSC_G3_IO2, TIM8_CH2N, TIM1_CH2N, EVENTOUT; additional functions ADC3_IN12, COMP4_INP, OPAMP2_VINP, OPAMP3_VINP."
      },
      {
        "number": "47",
        "name": "PB1",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa) with reduced touch sensing sensitivity, recommended as sampling capacitor I/O; alternate functions TIM3_CH4, TSC_G3_IO3, TIM8_CH3N, TIM1_CH3N, COMP4_OUT, EVENTOUT; additional functions ADC3_IN1 (fast ADC channel), OPAMP3_VOUT."
      },
      {
        "number": "48",
        "name": "PB2",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions TSC_G3_IO4, EVENTOUT; additional functions ADC2_IN12, COMP4_INM, OPAMP3_VINM."
      },
      {
        "number": "49",
        "name": "PF11",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_ETR."
      },
      {
        "number": "50",
        "name": "PF12",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_CH1, FMC_A6."
      },
      {
        "number": "51",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin."
      },
      {
        "number": "52",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; VDD voltage range is 2.0 V to 3.6 V."
      },
      {
        "number": "53",
        "name": "PF13",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_CH2, FMC_A7."
      },
      {
        "number": "54",
        "name": "PF14",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_CH3, FMC_A8."
      },
      {
        "number": "55",
        "name": "PF15",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_CH4, FMC_A9."
      },
      {
        "number": "56",
        "name": "PG0",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_CH1N, FMC_A10."
      },
      {
        "number": "57",
        "name": "PG1",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_CH2N, FMC_A11."
      },
      {
        "number": "58",
        "name": "PE7",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_ETR, FMC_D4; additional function ADC3_IN13."
      },
      {
        "number": "59",
        "name": "PE8",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_CH1N, FMC_D5; additional functions ADC34_IN6, COMP4_INM."
      },
      {
        "number": "60",
        "name": "PE9",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_CH1, FMC_D6; additional function ADC3_IN2 (fast ADC channel)."
      },
      {
        "number": "61",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin."
      },
      {
        "number": "62",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; VDD voltage range is 2.0 V to 3.6 V."
      },
      {
        "number": "63",
        "name": "PE10",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_CH2N, FMC_D7; additional function ADC3_IN14."
      },
      {
        "number": "64",
        "name": "PE11",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_CH2, SPI4_NSS, FMC_D8; additional function ADC3_IN15."
      },
      {
        "number": "65",
        "name": "PE12",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_CH3N, SPI4_SCK, FMC_D9; additional function ADC3_IN16."
      },
      {
        "number": "66",
        "name": "PE13",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_CH3, SPI4_MISO, FMC_D10; additional function ADC3_IN3 (fast ADC channel)."
      },
      {
        "number": "67",
        "name": "PE14",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_CH4, SPI4_MOSI, TIM1_BKIN2, FMC_D11; additional function ADC4_IN1 (fast ADC channel)."
      },
      {
        "number": "68",
        "name": "PE15",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM1_BKIN, USART3_RX, FMC_D12; additional function ADC4_IN2 (fast ADC channel)."
      },
      {
        "number": "69",
        "name": "PB10",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions TIM2_CH3, TSC_SYNC, USART3_TX, EVENTOUT; additional functions COMP5_INM, OPAMP3_VINM, OPAMP4_VINM."
      },
      {
        "number": "70",
        "name": "PB11",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions TIM2_CH4, TSC_G6_IO1, USART3_RX, EVENTOUT; additional functions ADC12_IN14, COMP6_INP, OPAMP4_VINP."
      },
      {
        "number": "71",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin."
      },
      {
        "number": "72",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; VDD voltage range is 2.0 V to 3.6 V."
      },
      {
        "number": "73",
        "name": "PB12",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa) with reduced touch sensing sensitivity, recommended as sampling capacitor I/O; alternate functions TSC_G6_IO2, I2C2_SMBAL, SPI2_NSS/I2S2_WS, TIM1_BKIN, USART3_CK, EVENTOUT; additional functions ADC4_IN3 (fast ADC channel), COMP3_INM, OPAMP4_VOUT."
      },
      {
        "number": "74",
        "name": "PB13",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions TSC_G6_IO3, SPI2_SCK/I2S2_CK, TIM1_CH1N, USART3_CTS, EVENTOUT; additional functions ADC3_IN5 (fast ADC channel), COMP5_INP, OPAMP3_VINP, OPAMP4_VINP."
      },
      {
        "number": "75",
        "name": "PB14",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions TIM15_CH1, TSC_G6_IO4, SPI2_MISO/I2S2ext_SD, TIM1_CH2N, USART3_RTS, EVENTOUT; additional functions ADC4_IN4 (fast ADC channel), COMP3_INP, OPAMP2_VINP."
      },
      {
        "number": "76",
        "name": "PB15",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions RTC_REFIN, TIM15_CH2, TIM15_CH1N, TIM1_CH3N, SPI2_MOSI/I2S2_SD, EVENTOUT; additional functions ADC4_IN5 (fast ADC channel), COMP6_INM."
      },
      {
        "number": "77",
        "name": "PD8",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, USART3_TX, FMC_D13; additional functions ADC4_IN12, OPAMP4_VINM."
      },
      {
        "number": "78",
        "name": "PD9",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, USART3_RX, FMC_D14; additional function ADC4_IN13."
      },
      {
        "number": "79",
        "name": "PD10",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, USART3_CK, FMC_D15; additional functions ADC34_IN7, COMP6_INM."
      },
      {
        "number": "80",
        "name": "PD11",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, USART3_CTS, FMC_A16; additional functions ADC34_IN8, OPAMP4_VINP."
      },
      {
        "number": "81",
        "name": "PD12",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM4_CH1, TSC_G8_IO1, USART3_RTS, FMC_A17; additional function ADC34_IN9."
      },
      {
        "number": "82",
        "name": "PD13",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM4_CH2, TSC_G8_IO2, FMC_A18; additional functions ADC34_IN10, COMP5_INM."
      },
      {
        "number": "83",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin."
      },
      {
        "number": "84",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; VDD voltage range is 2.0 V to 3.6 V."
      },
      {
        "number": "85",
        "name": "PD14",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM4_CH3, TSC_G8_IO3, FMC_D0; additional functions ADC34_IN11, OPAMP2_VINP."
      },
      {
        "number": "86",
        "name": "PD15",
        "type": "bidirectional",
        "description": "3.3 V tolerant I/O (TTa); alternate functions EVENTOUT, TIM4_CH4, TSC_G8_IO4, SPI2_NSS, FMC_D1; additional function COMP3_INM."
      },
      {
        "number": "87",
        "name": "PG2",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_CH3N, FMC_A12."
      },
      {
        "number": "88",
        "name": "PG3",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_BKIN, FMC_A13."
      },
      {
        "number": "89",
        "name": "PG4",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_BKIN2, FMC_A14."
      },
      {
        "number": "90",
        "name": "PG5",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM20_ETR, FMC_A15."
      },
      {
        "number": "91",
        "name": "PG6",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, FMC_INT2."
      },
      {
        "number": "92",
        "name": "PG7",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, FMC_INT3."
      },
      {
        "number": "93",
        "name": "PG8",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate function EVENTOUT."
      },
      {
        "number": "94",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin."
      },
      {
        "number": "95",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; VDD voltage range is 2.0 V to 3.6 V."
      },
      {
        "number": "96",
        "name": "PC6",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM3_CH1, TIM8_CH1, I2S2_MCK, COMP6_OUT."
      },
      {
        "number": "97",
        "name": "PC7",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM3_CH2, TIM8_CH2, I2S3_MCK, COMP5_OUT."
      },
      {
        "number": "98",
        "name": "PC8",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM3_CH3, TIM8_CH3, COMP3_OUT."
      },
      {
        "number": "99",
        "name": "PC9",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions EVENTOUT, TIM3_CH4, I2C3_SDA, TIM8_CH4, I2SCKIN, TIM8_BKIN2."
      },
      {
        "number": "100",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions MCO, I2C3_SCL, I2C2_SMBAL, I2S2_MCK, TIM1_CH1, USART1_CK, COMP3_OUT, TIM4_ETR, EVENTOUT."
      },
      {
        "number": "101",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions I2C3_SMBAL, TSC_G4_IO1, I2C2_SCL, I2S3_MCK, TIM1_CH2, USART1_TX, COMP5_OUT, TIM15_BKIN, TIM2_CH3, EVENTOUT."
      },
      {
        "number": "102",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions TIM17_BKIN, TSC_G4_IO2, I2C2_SDA, SPI2_MISO/I2S2ext_SD, TIM1_CH3, USART1_RX, COMP6_OUT, TIM2_CH4, TIM8_BKIN, EVENTOUT."
      },
      {
        "number": "103",
        "name": "PA11",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions SPI2_MOSI/I2S2_SD, TIM1_CH1N, USART1_CTS, COMP1_OUT, CAN_RX, TIM4_CH1, TIM1_CH4, TIM1_BKIN2, EVENTOUT; additional function USB_DM."
      },
      {
        "number": "104",
        "name": "PA12",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions TIM16_CH1, I2SCKIN, TIM1_CH2N, USART1_RTS, COMP2_OUT, CAN_TX, TIM4_CH2, TIM1_ETR, EVENTOUT; additional function USB_DP."
      },
      {
        "number": "105",
        "name": "PA13",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions SWDIO-JTMS, TIM16_CH1N, TSC_G4_IO3, IR-OUT, USART3_CTS, TIM4_CH3, EVENTOUT."
      },
      {
        "number": "106",
        "name": "PH2",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate function EVENTOUT."
      },
      {
        "number": "107",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin."
      },
      {
        "number": "108",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; VDD voltage range is 2.0 V to 3.6 V."
      },
      {
        "number": "109",
        "name": "PA14",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions SWCLK-JTCK, TSC_G4_IO4, I2C1_SDA, TIM8_CH2, TIM1_BKIN, USART2_TX, EVENTOUT."
      },
      {
        "number": "110",
        "name": "PA15",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions JTDI, TIM2_CH1/TIM2_ETR, TIM8_CH1, TSC_SYNC, I2C1_SCL, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_RX, TIM1_BKIN, EVENTOUT."
      },
      {
        "number": "111",
        "name": "PC10",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM8_CH1N, UART4_TX, SPI3_SCK/I2S3_CK, USART3_TX."
      },
      {
        "number": "112",
        "name": "PC11",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM8_CH2N, UART4_RX, SPI3_MISO/I2S3ext_SD, USART3_RX."
      },
      {
        "number": "113",
        "name": "PC12",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM8_CH3N, UART5_TX, SPI3_MOSI/I2S3_SD, USART3_CK."
      },
      {
        "number": "114",
        "name": "PD0",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, CAN_RX, FMC_D2."
      },
      {
        "number": "115",
        "name": "PD1",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM8_CH4, TIM8_BKIN2, CAN_TX, FMC_D3."
      },
      {
        "number": "116",
        "name": "PD2",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM3_ETR, TIM8_BKIN, UART5_RX."
      },
      {
        "number": "117",
        "name": "PD3",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM2_CH1/TIM2_ETR, USART2_CTS, FMC_CLK."
      },
      {
        "number": "118",
        "name": "PD4",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM2_CH2, USART2_RTS, FMC_NOE."
      },
      {
        "number": "119",
        "name": "PD5",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, USART2_TX, FMC_NWE."
      },
      {
        "number": "120",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin."
      },
      {
        "number": "121",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; VDD voltage range is 2.0 V to 3.6 V."
      },
      {
        "number": "122",
        "name": "PD6",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM2_CH4, USART2_RX, FMC_NWAIT."
      },
      {
        "number": "123",
        "name": "PD7",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM2_CH3, USART2_CK, FMC_NE1/FMC_NCE2."
      },
      {
        "number": "124",
        "name": "PG9",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, FMC_NE2/FMC_NCE3."
      },
      {
        "number": "125",
        "name": "PG10",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, FMC_NCE4_1/FMC_NE3."
      },
      {
        "number": "126",
        "name": "PG11",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, FMC_NCE4_2."
      },
      {
        "number": "127",
        "name": "PG12",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, FMC_NE4."
      },
      {
        "number": "128",
        "name": "PG13",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, FMC_A24."
      },
      {
        "number": "129",
        "name": "PG14",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, FMC_A25."
      },
      {
        "number": "130",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin."
      },
      {
        "number": "131",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; VDD voltage range is 2.0 V to 3.6 V."
      },
      {
        "number": "132",
        "name": "PG15",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate function EVENTOUT."
      },
      {
        "number": "133",
        "name": "PB3",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions JTDO-TRACESWO, TIM2_CH2, TIM4_ETR, TSC_G5_IO1, TIM8_CH1N, SPI1_SCK, SPI3_SCK/I2S3_CK, USART2_TX, TIM3_ETR, EVENTOUT."
      },
      {
        "number": "134",
        "name": "PB4",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions JTRST, TIM16_CH1, TIM3_CH1, TSC_G5_IO2, TIM8_CH2N, SPI1_MISO, SPI3_MISO/I2S3ext_SD, USART2_RX, TIM17_BKIN, EVENTOUT."
      },
      {
        "number": "135",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions TIM16_BKIN, TIM3_CH2, TIM8_CH3N, I2C1_SMBAl, SPI1_MOSI, SPI3_MOSI/I2S3_SD, USART2_CK, I2C3_SDA, TIM17_CH1, EVENTOUT."
      },
      {
        "number": "136",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions TIM16_CH1N, TIM4_CH1, TSC_G5_IO3, I2C1_SCL, TIM8_CH1, TIM8_ETR, USART1_TX, TIM8_BKIN2, EVENTOUT."
      },
      {
        "number": "137",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions TIM17_CH1N, TIM4_CH2, TSC_G5_IO4, I2C1_SDA, TIM8_BKIN, USART1_RX, TIM3_CH4, FMC_NADV, EVENTOUT."
      },
      {
        "number": "138",
        "name": "BOOT0",
        "type": "input",
        "description": "Dedicated BOOT0 pin used for boot mode selection; the datasheet table gives no I/O structure for it."
      },
      {
        "number": "139",
        "name": "PB8",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions TIM16_CH1, TIM4_CH3, TSC_SYNC, I2C1_SCL, USART3_RX, COMP1_OUT, CAN_RX, TIM8_CH2, TIM1_BKIN, EVENTOUT."
      },
      {
        "number": "140",
        "name": "PB9",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with I2C FM+ option (FTf); alternate functions TIM17_CH1, TIM4_CH4, I2C1_SDA, IR-OUT, USART3_TX, COMP2_OUT, CAN_TX, TIM8_CH3, EVENTOUT."
      },
      {
        "number": "141",
        "name": "PE0",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM4_ETR, TIM16_CH1, TIM20_ETR, USART1_TX, FMC_NBL0."
      },
      {
        "number": "142",
        "name": "PE1",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions EVENTOUT, TIM17_CH1, TIM20_CH4, USART1_RX, FMC_NBL1."
      },
      {
        "number": "143",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin."
      },
      {
        "number": "144",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; VDD voltage range is 2.0 V to 3.6 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Package taken from the LQFP144 (20 x 20 mm) column of Table 13 and Figure 6. The MPN suffix Z (144 p; Table 13 note 1 applies to many pins: the function is available only on certain devices. Alternate a; Pins 7, 8 and 9 (PC13, PC14, PC15) are powered through the power switch, which sinks only 3 mA. Per "
        ],
        "pages_sent": 70,
        "cost_usd": 0.4165,
        "at": "2026-10-11T13:38:52"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586180216440172544",
        "pages": 173,
        "sha256": "5009ea08fac5eb65",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 144,
        "described": 144,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "stm32f303zet6.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          22.0,
          22.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b4d698da8bb7697b754adb5655c932342462d9b9341cdaa081b3604dbdf7559b",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stm32f303zet6-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          22.0,
          22.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "da191dc87a6a8ba9d0036452311a03537d238ff3e454743a5857c9380bc21efc",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}