STM32L431VCT6

{
  "slug": "stm32l431vct6",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-100(14x14). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32l431vct6",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32l431vct6.kicad_sym",
    "stm32l431vct6.kicad_mod",
    "stm32l431vct6.glb",
    "stm32l431vct6.step",
    "stm32l431vct6.lbr",
    "docs/hero.png",
    "docs/stm32l431vct6-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stm32l431vct6-hero.glb",
    "stm32l431vct6-hero.overlay.json"
  ],
  "component": {
    "mpn": "STM32L431VCT6",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-100(14x14)",
    "pin_count": 100,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886246482956288",
    "parts": {
      "symbol": "stm32l431vct6.kicad_sym",
      "footprint": "stm32l431vct6.kicad_mod",
      "model_3d": "stm32l431vct6-hero.glb",
      "model_3d_plain": "stm32l431vct6.glb",
      "model_3d_step": "stm32l431vct6-etched.step",
      "model_3d_step_plain": "stm32l431vct6.step",
      "lbr": "stm32l431vct6.lbr"
    },
    "distributor_links": {
      "lcsc": "C455384",
      "digikey": "497-17850-ND",
      "mouser": "511-STM32L431VCT6"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T08:22:30Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-17850-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32L431VCT6",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PE2",
        "type": "bidirectional",
        "description": "GPIO port E pin 2, 5V tolerant input/output, supports trace clock and SAI alternate functions."
      },
      {
        "number": "2",
        "name": "PE3",
        "type": "bidirectional",
        "description": "GPIO port E pin 3, 5V tolerant input/output, supports trace data and SAI alternate functions."
      },
      {
        "number": "3",
        "name": "PE4",
        "type": "bidirectional",
        "description": "GPIO port E pin 4, 5V tolerant input/output, supports trace data and SAI alternate functions."
      },
      {
        "number": "4",
        "name": "PE5",
        "type": "bidirectional",
        "description": "GPIO port E pin 5, 5V tolerant input/output, supports trace data and SAI alternate functions, RTC_TAMP3 and WKUP3."
      },
      {
        "number": "5",
        "name": "PE6",
        "type": "bidirectional",
        "description": "GPIO port E pin 6, 5V tolerant input/output, supports trace data and SAI alternate functions."
      },
      {
        "number": "6",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup battery supply input for RTC and 32x32-bit backup registers, 1.55-3.6V, operates independently during low-power modes."
      },
      {
        "number": "7",
        "name": "PC13",
        "type": "bidirectional",
        "description": "GPIO port C pin 13, 5V tolerant input/output with limited current (3 mA max through power switch), RTC wakeup and tamper functions."
      },
      {
        "number": "8",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "GPIO port C pin 14 / 32 kHz oscillator input, 5V tolerant, configurable for RTC external clock source."
      },
      {
        "number": "9",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "GPIO port C pin 15 / 32 kHz oscillator output, 5V tolerant, provides buffered clock to external circuits."
      },
      {
        "number": "10",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin, must be connected to external ground with main power supply and bypass capacitor."
      },
      {
        "number": "11",
        "name": "VDD",
        "type": "power_in",
        "description": "Main 3.3V power supply input, 1.71-3.6V, requires 100 nF bypass capacitor placed close to pin."
      },
      {
        "number": "12",
        "name": "PH0-OSC_IN",
        "type": "bidirectional",
        "description": "GPIO port H pin 0 / main oscillator input, 5V tolerant, accepts 4-48 MHz crystal or external clock."
      },
      {
        "number": "13",
        "name": "PH1-OSC_OUT",
        "type": "bidirectional",
        "description": "GPIO port H pin 1 / main oscillator output, 5V tolerant, drives resonator for crystal oscillator circuit."
      },
      {
        "number": "14",
        "name": "NRST",
        "type": "input",
        "description": "System reset pin with embedded weak pull-up resistor, triggers MCU reset when driven low, active low."
      },
      {
        "number": "15",
        "name": "PC0",
        "type": "bidirectional",
        "description": "GPIO port C pin 0, 5V tolerant with analog switch, supports LPTIM1, I2C3, LPUART1, and ADC1_IN1 functions."
      },
      {
        "number": "16",
        "name": "PC1",
        "type": "bidirectional",
        "description": "GPIO port C pin 1, 5V tolerant with analog switch, supports LPTIM1, I2C3, LPUART1, and ADC1_IN2 functions."
      },
      {
        "number": "17",
        "name": "PC2",
        "type": "bidirectional",
        "description": "GPIO port C pin 2, 5V tolerant with analog switch, supports LPTIM1, SPI2, and ADC1_IN3 functions."
      },
      {
        "number": "18",
        "name": "PC3",
        "type": "bidirectional",
        "description": "GPIO port C pin 3, 5V tolerant with analog switch, supports LPTIM1, SPI2, SAI1, and ADC1_IN4 functions."
      },
      {
        "number": "19",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground pin for ADC/DAC/OPAMP/COMP, must be connected to main ground with 100 nF bypass capacitor."
      },
      {
        "number": "20",
        "name": "VREF-",
        "type": "power_in",
        "description": "Negative reference voltage pin for ADC, typically connected to VSSA or 0V, affects ADC conversion accuracy."
      },
      {
        "number": "21",
        "name": "VREF+",
        "type": "power_in",
        "description": "Positive reference voltage pin for ADC, 2V to VDDA, requires 1 µF plus 100 nF bypass capacitors, supports VREFBUF output."
      },
      {
        "number": "22",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog power supply input 1.62-3.6V, powers ADC, DAC, OPAMP, COMP, and VREFBUF, requires independent filtering."
      },
      {
        "number": "23",
        "name": "PA0",
        "type": "bidirectional",
        "description": "GPIO port A pin 0, 5V tolerant with analog switch, supports TIM2, USART2, COMP, SAI1, ADC1_IN5, RTC_TAMP2, and WKUP1."
      },
      {
        "number": "24",
        "name": "PA1",
        "type": "bidirectional",
        "description": "GPIO port A pin 1, 5V tolerant with analog switch, supports TIM2, I2C1, SPI1, USART2, TIM15, and ADC1_IN6."
      },
      {
        "number": "25",
        "name": "PA2",
        "type": "bidirectional",
        "description": "GPIO port A pin 2, 5V tolerant with analog switch, supports TIM2, USART2, LPUART1, QUADSPI, COMP2, TIM15, ADC1_IN7, WKUP4."
      },
      {
        "number": "26",
        "name": "PA3",
        "type": "bidirectional",
        "description": "GPIO port A pin 3, 3.6V tolerant with analog switch, supports TIM2, USART2, LPUART1, QUADSPI, SAI1, TIM15, ADC1_IN8."
      },
      {
        "number": "27",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin, must be connected to external ground with main power supply and bypass capacitor."
      },
      {
        "number": "28",
        "name": "VDD",
        "type": "power_in",
        "description": "Main 3.3V power supply input, 1.71-3.6V, requires 100 nF bypass capacitor placed close to pin."
      },
      {
        "number": "29",
        "name": "PA4",
        "type": "bidirectional",
        "description": "GPIO port A pin 4, 3.6V tolerant with analog switch, supports SPI1, SPI3, USART2, SAI1, LPTIM2, DAC1_OUT1, ADC1_IN9."
      },
      {
        "number": "30",
        "name": "PA5",
        "type": "bidirectional",
        "description": "GPIO port A pin 5, 3.6V tolerant with analog switch, supports TIM2, SPI1, LPTIM2, DAC1_OUT2, ADC1_IN10."
      },
      {
        "number": "31",
        "name": "PA6",
        "type": "bidirectional",
        "description": "GPIO port A pin 6, 5V tolerant with analog switch, supports TIM1, SPI1, COMP1, USART3, LPUART1, QUADSPI, TIM16, ADC1_IN11."
      },
      {
        "number": "32",
        "name": "PA7",
        "type": "bidirectional",
        "description": "GPIO port A pin 7, 5V tolerant with analog switch and Fm+ capable, supports TIM1, I2C3, SPI1, QUADSPI, COMP2, ADC1_IN12."
      },
      {
        "number": "33",
        "name": "PC4",
        "type": "bidirectional",
        "description": "GPIO port C pin 4, 5V tolerant with analog switch, supports USART3 and ADC1_IN13 functions."
      },
      {
        "number": "34",
        "name": "PC5",
        "type": "bidirectional",
        "description": "GPIO port C pin 5, 5V tolerant with analog switch, supports USART3, ADC1_IN14, COMP1_INP, and WKUP5."
      },
      {
        "number": "35",
        "name": "PB0",
        "type": "bidirectional",
        "description": "GPIO port B pin 0, 5V tolerant with analog switch, supports TIM1, SPI1, USART3, QUADSPI, COMP1, SAI1, ADC1_IN15."
      },
      {
        "number": "36",
        "name": "PB1",
        "type": "bidirectional",
        "description": "GPIO port B pin 1, 5V tolerant with analog switch, supports TIM1, USART3, LPUART1, QUADSPI, LPTIM2, ADC1_IN16."
      },
      {
        "number": "37",
        "name": "PB2",
        "type": "bidirectional",
        "description": "GPIO port B pin 2, 5V tolerant with analog switch, supports RTC_OUT, LPTIM1, I2C3 SMBA, and COMP1_INP."
      },
      {
        "number": "38",
        "name": "PE7",
        "type": "bidirectional",
        "description": "GPIO port E pin 7, 5V tolerant input/output, supports TIM1 and SAI1 alternate functions."
      },
      {
        "number": "39",
        "name": "PE8",
        "type": "bidirectional",
        "description": "GPIO port E pin 8, 5V tolerant input/output, supports TIM1 and SAI1 alternate functions."
      },
      {
        "number": "40",
        "name": "PE9",
        "type": "bidirectional",
        "description": "GPIO port E pin 9, 5V tolerant input/output, supports TIM1 and SAI1 alternate functions."
      },
      {
        "number": "41",
        "name": "PE10",
        "type": "bidirectional",
        "description": "GPIO port E pin 10, 5V tolerant input/output, supports TIM1, TSC_G5_IO1, QUADSPI, and SAI1 alternate functions."
      },
      {
        "number": "42",
        "name": "PE11",
        "type": "bidirectional",
        "description": "GPIO port E pin 11, 5V tolerant input/output, supports TIM1, TSC_G5_IO2, and QUADSPI alternate functions."
      },
      {
        "number": "43",
        "name": "PE12",
        "type": "bidirectional",
        "description": "GPIO port E pin 12, 5V tolerant input/output, supports TIM1, SPI1, TSC_G5_IO3, and QUADSPI alternate functions."
      },
      {
        "number": "44",
        "name": "PE13",
        "type": "bidirectional",
        "description": "GPIO port E pin 13, 5V tolerant input/output, supports TIM1, SPI1, TSC_G5_IO4, and QUADSPI alternate functions."
      },
      {
        "number": "45",
        "name": "PE14",
        "type": "bidirectional",
        "description": "GPIO port E pin 14, 5V tolerant input/output, supports TIM1, SPI1, COMP2, and QUADSPI alternate functions."
      },
      {
        "number": "46",
        "name": "PE15",
        "type": "bidirectional",
        "description": "GPIO port E pin 15, 5V tolerant input/output, supports TIM1, SPI1, COMP1, and QUADSPI alternate functions."
      },
      {
        "number": "47",
        "name": "PB10",
        "type": "bidirectional",
        "description": "GPIO port B pin 10, 5V tolerant Fm+ capable input/output, supports TIM2, I2C2, SPI2, USART3, LPUART1, QUADSPI, COMP1, SAI1."
      },
      {
        "number": "48",
        "name": "PB11",
        "type": "bidirectional",
        "description": "GPIO port B pin 11, 5V tolerant Fm+ capable input/output, supports TIM2, I2C2, USART3, LPUART1, QUADSPI, COMP2."
      },
      {
        "number": "49",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin, must be connected to external ground with main power supply and bypass capacitor."
      },
      {
        "number": "50",
        "name": "VDD",
        "type": "power_in",
        "description": "Main 3.3V power supply input, 1.71-3.6V, requires 100 nF bypass capacitor placed close to pin."
      },
      {
        "number": "51",
        "name": "PB12",
        "type": "bidirectional",
        "description": "GPIO port B pin 12, 5V tolerant input/output, supports TIM1, I2C2, SPI2, USART3, LPUART1, TSC_G1_IO1, SWPMI1, SAI1, TIM15."
      },
      {
        "number": "52",
        "name": "PB13",
        "type": "bidirectional",
        "description": "GPIO port B pin 13, 5V tolerant Fm+ capable input/output, supports TIM1, I2C2, SPI2, USART3, LPUART1, TSC_G1_IO2, SWPMI1, SAI1."
      },
      {
        "number": "53",
        "name": "PB14",
        "type": "bidirectional",
        "description": "GPIO port B pin 14, 5V tolerant Fm+ capable input/output, supports TIM1, I2C2, SPI2, USART3, TSC_G1_IO3, SWPMI1, SAI1, TIM15."
      },
      {
        "number": "54",
        "name": "PB15",
        "type": "bidirectional",
        "description": "GPIO port B pin 15, 5V tolerant input/output, supports RTC_REFIN, TIM1, SPI2, TSC_G1_IO4, SWPMI1, SAI1, TIM15."
      },
      {
        "number": "55",
        "name": "PD8",
        "type": "bidirectional",
        "description": "GPIO port D pin 8, 5V tolerant input/output, supports USART3 alternate function."
      },
      {
        "number": "56",
        "name": "PD9",
        "type": "bidirectional",
        "description": "GPIO port D pin 9, 5V tolerant input/output, supports USART3 alternate function."
      },
      {
        "number": "57",
        "name": "PD10",
        "type": "bidirectional",
        "description": "GPIO port D pin 10, 5V tolerant input/output, supports USART3, TSC_G6_IO1 alternate functions."
      },
      {
        "number": "58",
        "name": "PD11",
        "type": "bidirectional",
        "description": "GPIO port D pin 11, 5V tolerant input/output, supports USART3, TSC_G6_IO2, LPTIM2 alternate functions."
      },
      {
        "number": "59",
        "name": "PD12",
        "type": "bidirectional",
        "description": "GPIO port D pin 12, 5V tolerant input/output, supports USART3, TSC_G6_IO3, LPTIM2 alternate functions."
      },
      {
        "number": "60",
        "name": "PD13",
        "type": "bidirectional",
        "description": "GPIO port D pin 13, 5V tolerant input/output, supports TSC_G6_IO4, LPTIM2 alternate functions."
      },
      {
        "number": "61",
        "name": "PD14",
        "type": "bidirectional",
        "description": "GPIO port D pin 14, 5V tolerant input/output, EVENTOUT alternate function only."
      },
      {
        "number": "62",
        "name": "PD15",
        "type": "bidirectional",
        "description": "GPIO port D pin 15, 5V tolerant input/output, EVENTOUT alternate function only."
      },
      {
        "number": "63",
        "name": "PC6",
        "type": "bidirectional",
        "description": "GPIO port C pin 6, 5V tolerant input/output, supports TSC_G4_IO1, SDMMC1_D6 alternate functions."
      },
      {
        "number": "64",
        "name": "PC7",
        "type": "bidirectional",
        "description": "GPIO port C pin 7, 5V tolerant input/output, supports TSC_G4_IO2, SDMMC1_D7 alternate functions."
      },
      {
        "number": "65",
        "name": "PC8",
        "type": "bidirectional",
        "description": "GPIO port C pin 8, 5V tolerant input/output, supports TSC_G4_IO3, SDMMC1_D0 alternate functions."
      },
      {
        "number": "66",
        "name": "PC9",
        "type": "bidirectional",
        "description": "GPIO port C pin 9, 5V tolerant input/output, supports TSC_G4_IO4, SDMMC1_D1 alternate functions."
      },
      {
        "number": "67",
        "name": "PA8",
        "type": "bidirectional",
        "description": "GPIO port A pin 8, 5V tolerant input/output, supports MCO, TIM1, USART1, SWPMI1, SAI1, LPTIM2 alternate functions."
      },
      {
        "number": "68",
        "name": "PA9",
        "type": "bidirectional",
        "description": "GPIO port A pin 9, 5V tolerant Fm+ capable input/output, supports TIM1, I2C1, USART1, SAI1, TIM15 alternate functions."
      },
      {
        "number": "69",
        "name": "PA10",
        "type": "bidirectional",
        "description": "GPIO port A pin 10, 5V tolerant Fm+ capable input/output, supports TIM1, I2C1, USART1, SAI1 alternate functions."
      },
      {
        "number": "70",
        "name": "PA11",
        "type": "bidirectional",
        "description": "GPIO port A pin 11, 5V tolerant input/output, supports TIM1, SPI1, COMP1, USART1, CAN1_RX alternate functions."
      },
      {
        "number": "71",
        "name": "PA12",
        "type": "bidirectional",
        "description": "GPIO port A pin 12, 5V tolerant input/output, supports TIM1, SPI1, USART1, CAN1_TX alternate functions."
      },
      {
        "number": "72",
        "name": "PA13",
        "type": "bidirectional",
        "description": "GPIO port A pin 13 / JTAG TMS / Serial Wire Debug I/O, 5V tolerant, internal pull-up after reset, debug port shared with alternate functions."
      },
      {
        "number": "73",
        "name": "VDD",
        "type": "power_in",
        "description": "Main 3.3V power supply input, 1.71-3.6V, requires 100 nF bypass capacitor placed close to pin."
      },
      {
        "number": "74",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin, must be connected to external ground with main power supply and bypass capacitor."
      },
      {
        "number": "75",
        "name": "VDD",
        "type": "power_in",
        "description": "Main 3.3V power supply input, 1.71-3.6V, requires 100 nF bypass capacitor placed close to pin."
      },
      {
        "number": "76",
        "name": "PA14",
        "type": "bidirectional",
        "description": "GPIO port A pin 14 / JTAG TCK / Serial Wire Debug Clock, 5V tolerant, internal pull-down after reset, debug port shared with alternate functions."
      },
      {
        "number": "77",
        "name": "PA15",
        "type": "bidirectional",
        "description": "GPIO port A pin 15 / JTAG TDI, 5V tolerant, internal pull-up after reset, supports TIM2, USART2, SPI1, SPI3, USART3, TSC_G3_IO1, SWPMI1."
      },
      {
        "number": "78",
        "name": "PC10",
        "type": "bidirectional",
        "description": "GPIO port C pin 10, 5V tolerant input/output, supports SPI3, USART3, TSC_G3_IO2, SDMMC1_D2 alternate functions."
      },
      {
        "number": "79",
        "name": "PC11",
        "type": "bidirectional",
        "description": "GPIO port C pin 11, 5V tolerant input/output, supports SPI3, USART3, TSC_G3_IO3, SDMMC1_D3 alternate functions."
      },
      {
        "number": "80",
        "name": "PC12",
        "type": "bidirectional",
        "description": "GPIO port C pin 12, 5V tolerant input/output, supports SPI3, USART3, TSC_G3_IO4, SDMMC1_CK alternate functions."
      },
      {
        "number": "81",
        "name": "PD0",
        "type": "bidirectional",
        "description": "GPIO port D pin 0, 5V tolerant input/output, supports SPI2_NSS, CAN1_RX alternate functions."
      },
      {
        "number": "82",
        "name": "PD1",
        "type": "bidirectional",
        "description": "GPIO port D pin 1, 5V tolerant input/output, supports SPI2_SCK, CAN1_TX alternate functions."
      },
      {
        "number": "83",
        "name": "PD2",
        "type": "bidirectional",
        "description": "GPIO port D pin 2, 5V tolerant input/output, supports USART3, TSC_SYNC, SDMMC1_CMD alternate functions."
      },
      {
        "number": "84",
        "name": "PD3",
        "type": "bidirectional",
        "description": "GPIO port D pin 3, 5V tolerant input/output, supports SPI2, USART2, QUADSPI alternate functions."
      },
      {
        "number": "85",
        "name": "PD4",
        "type": "bidirectional",
        "description": "GPIO port D pin 4, 5V tolerant input/output, supports SPI2, USART2, QUADSPI alternate functions."
      },
      {
        "number": "86",
        "name": "PD5",
        "type": "bidirectional",
        "description": "GPIO port D pin 5, 5V tolerant input/output, supports USART2, QUADSPI alternate functions."
      },
      {
        "number": "87",
        "name": "PD6",
        "type": "bidirectional",
        "description": "GPIO port D pin 6, 5V tolerant input/output, supports USART2, QUADSPI, SAI1 alternate functions."
      },
      {
        "number": "88",
        "name": "PD7",
        "type": "bidirectional",
        "description": "GPIO port D pin 7, 5V tolerant input/output, supports USART2, QUADSPI alternate functions."
      },
      {
        "number": "89",
        "name": "PB3",
        "type": "bidirectional",
        "description": "GPIO port B pin 3 / JTAG TDO / Trace Serial Wire Output, 5V tolerant with analog switch, internal pull-up after reset, debug port shared with alternate functions."
      },
      {
        "number": "90",
        "name": "PB4",
        "type": "bidirectional",
        "description": "GPIO port B pin 4 / JTAG NTRST, 5V tolerant with analog switch and Fm+ capable, internal pull-up after reset, supports I2C3, SPI1, SPI3, USART1, TSC_G2_IO1, SAI1."
      },
      {
        "number": "91",
        "name": "PB5",
        "type": "bidirectional",
        "description": "GPIO port B pin 5, 5V tolerant input/output, supports LPTIM1, I2C1, SPI1, SPI3, USART1, TSC_G2_IO2, COMP2, SAI1, TIM16."
      },
      {
        "number": "92",
        "name": "PB6",
        "type": "bidirectional",
        "description": "GPIO port B pin 6, 5V tolerant with analog switch and Fm+ capable input/output, supports LPTIM1, I2C1, USART1, TSC_G2_IO3, SAI1, TIM16."
      },
      {
        "number": "93",
        "name": "PB7",
        "type": "bidirectional",
        "description": "GPIO port B pin 7, 5V tolerant with analog switch and Fm+ capable input/output, supports LPTIM1, I2C1, USART1, TSC_G2_IO4, COMP2_INM, PVD_IN."
      },
      {
        "number": "94",
        "name": "PH3/BOOT0",
        "type": "bidirectional",
        "description": "GPIO port H pin 3 / Boot configuration pin, 5V tolerant input/output, selects boot from flash (low) or system memory (high) during reset."
      },
      {
        "number": "95",
        "name": "PB8",
        "type": "bidirectional",
        "description": "GPIO port B pin 8, 5V tolerant Fm+ capable input/output, supports I2C1, CAN1_RX, SDMMC1_D4, SAI1, TIM16 alternate functions."
      },
      {
        "number": "96",
        "name": "PB9",
        "type": "bidirectional",
        "description": "GPIO port B pin 9, 5V tolerant Fm+ capable input/output, supports IR_OUT, I2C1, SPI2, CAN1_TX, SDMMC1_D5, SAI1 alternate functions."
      },
      {
        "number": "97",
        "name": "PE0",
        "type": "bidirectional",
        "description": "GPIO port E pin 0, 5V tolerant input/output, supports TIM16 alternate function."
      },
      {
        "number": "98",
        "name": "PE1",
        "type": "bidirectional",
        "description": "GPIO port E pin 1, 5V tolerant input/output, EVENTOUT alternate function only."
      },
      {
        "number": "99",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin, must be connected to external ground with main power supply and bypass capacitor."
      },
      {
        "number": "100",
        "name": "VDD",
        "type": "power_in",
        "description": "Main 3.3V power supply input, 1.71-3.6V, requires 100 nF bypass capacitor placed close to pin."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Multiple VDD, VSS, VDDA, VSSA pins present in 100-pin package require proper decoupling strategy as ; Debug pins PA13, PA14, PA15, PB3, PB4 have special configurations with internal pull-up/pull-down re; Oscillator pins PH0, PH1, PC14, PC15 require specific circuit design per application note recommenda"
        ],
        "pages_sent": 80,
        "cost_usd": 0.5843,
        "at": "2026-10-07T08:21:57"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886246482956288",
        "pages": 208,
        "sha256": "71963de3cb899f8f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 100,
        "described": 100,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "stm32l431vct6.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          16.0,
          16.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "51720097260ffba41c3062f85f67623721102fa535901c47cb555a1f444feeb3",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stm32l431vct6-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          16.0,
          16.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6f717ab848a551583a6c19e0f9a16be7f0b47de3ba3ccf06a64c2867fe40a231",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}