STM32L431KCU6TR

{
  "slug": "stm32l431kcu6tr",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-32(5x5). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32l431kcu6tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "stm32l431kcu6tr.step",
    "stm32l431kcu6tr.lbr",
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    "docs/stm32l431kcu6tr-datasheet.pdf",
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    "viewers/footprint.html",
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    "stm32l431kcu6tr-hero.overlay.json"
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  "component": {
    "mpn": "STM32L431KCU6TR",
    "manufacturer": "STMicroelectronics",
    "package": "UFQFPN-32(5x5)",
    "pin_count": 33,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893407582294016",
    "parts": {
      "symbol": "stm32l431kcu6tr.kicad_sym",
      "footprint": "stm32l431kcu6tr.kicad_mod",
      "model_3d": "stm32l431kcu6tr-hero.glb",
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      "model_3d_step": "stm32l431kcu6tr-etched.step",
      "model_3d_step_plain": "stm32l431kcu6tr.step",
      "lbr": "stm32l431kcu6tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2054968",
      "digikey": "497-STM32L431KCU6TR-ND",
      "mouser": "511-STM32L431KCU6TR"
    },
    "distributor_check": {
      "checked_at": "2026-10-06T16:47:37Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-STM32L431KCU6TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32L431KCU6TR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Main power supply input, 1.71V to 3.6V range"
      },
      {
        "number": "2",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "Port C pin 14, 5V tolerant input/output, functions as external 32kHz oscillator input when configured as OSC32_IN"
      },
      {
        "number": "3",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "Port C pin 15, 5V tolerant input/output, functions as external 32kHz oscillator output when configured as OSC32_OUT"
      },
      {
        "number": "4",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with embedded weak pull-up resistor and debouncing for system reset control"
      },
      {
        "number": "5",
        "name": "VDDA/VREF+",
        "type": "power_in",
        "description": "Analog power supply for ADC, DAC, comparators and operational amplifiers, 1.62V to 3.6V, also serves as positive reference voltage"
      },
      {
        "number": "6",
        "name": "PA0/CK_IN",
        "type": "bidirectional",
        "description": "Port A pin 0, 5V tolerant input/output with analog capability for ADC1_IN5, can function as external clock input or TIM2_CH1"
      },
      {
        "number": "7",
        "name": "PA1",
        "type": "bidirectional",
        "description": "Port A pin 1, 5V tolerant input/output with analog capability for ADC1_IN6 or TIM2_CH2"
      },
      {
        "number": "8",
        "name": "PA2",
        "type": "bidirectional",
        "description": "Port A pin 2, 5V tolerant input/output with analog capability for ADC1_IN7 or USART2_TX"
      },
      {
        "number": "9",
        "name": "PA3",
        "type": "bidirectional",
        "description": "Port A pin 3, 3.6V tolerant input/output with analog capability for operational amplifier output OPAMP1_VOUT or ADC1_IN8"
      },
      {
        "number": "10",
        "name": "PA4",
        "type": "bidirectional",
        "description": "Port A pin 4, 3.6V tolerant input/output with analog capability for DAC1_OUT1 or ADC1_IN9"
      },
      {
        "number": "11",
        "name": "PA5",
        "type": "bidirectional",
        "description": "Port A pin 5, 3.6V tolerant input/output with analog capability for DAC1_OUT2 or ADC1_IN10"
      },
      {
        "number": "12",
        "name": "PA6",
        "type": "bidirectional",
        "description": "Port A pin 6, 5V tolerant input/output with analog capability for ADC1_IN11 or TIM16_CH1"
      },
      {
        "number": "13",
        "name": "PA7",
        "type": "bidirectional",
        "description": "Port A pin 7, 5V tolerant input/output with analog capability for ADC1_IN12, Fm+ capable"
      },
      {
        "number": "14",
        "name": "PB0",
        "type": "bidirectional",
        "description": "Port B pin 0, 5V tolerant input/output with analog capability for ADC1_IN15"
      },
      {
        "number": "15",
        "name": "PB1",
        "type": "bidirectional",
        "description": "Port B pin 1, 5V tolerant input/output with analog capability for ADC1_IN16"
      },
      {
        "number": "16",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground (0V reference) for digital and analog circuits"
      },
      {
        "number": "17",
        "name": "VDD",
        "type": "power_in",
        "description": "Main power supply input, 1.71V to 3.6V range"
      },
      {
        "number": "18",
        "name": "PA8",
        "type": "bidirectional",
        "description": "Port A pin 8, 5V tolerant input/output for MCO clock output or TIM1_CH1"
      },
      {
        "number": "19",
        "name": "PA9",
        "type": "bidirectional",
        "description": "Port A pin 9, 5V tolerant input/output with Fm+ capability for USART1_TX or TIM1_CH2"
      },
      {
        "number": "20",
        "name": "PA10",
        "type": "bidirectional",
        "description": "Port A pin 10, 5V tolerant input/output with Fm+ capability for USART1_RX or TIM1_CH3"
      },
      {
        "number": "21",
        "name": "PA11",
        "type": "bidirectional",
        "description": "Port A pin 11, 5V tolerant input/output for CAN1_RX or TIM1_CH4"
      },
      {
        "number": "22",
        "name": "PA12",
        "type": "bidirectional",
        "description": "Port A pin 12, 5V tolerant input/output for CAN1_TX or USART1_RTS_DE"
      },
      {
        "number": "23",
        "name": "PA13",
        "type": "bidirectional",
        "description": "Port A pin 13, 5V tolerant input/output configured as JTAG TMS or Serial Wire Debug SWDIO after reset, internal pull-up resistor enabled"
      },
      {
        "number": "24",
        "name": "PA14",
        "type": "bidirectional",
        "description": "Port A pin 14, 5V tolerant input/output configured as JTAG TCK or Serial Wire Debug SWCLK after reset, internal pull-down resistor enabled"
      },
      {
        "number": "25",
        "name": "PA15",
        "type": "bidirectional",
        "description": "Port A pin 15, 5V tolerant input/output configured as JTAG TDI after reset, internal pull-up resistor enabled"
      },
      {
        "number": "26",
        "name": "PB3",
        "type": "bidirectional",
        "description": "Port B pin 3, 5V tolerant input/output with analog capability configured as JTAG TDO or Serial Wire Debug trace after reset"
      },
      {
        "number": "27",
        "name": "PB4",
        "type": "bidirectional",
        "description": "Port B pin 4, 5V tolerant input/output with Fm+ capability configured as JTAG NTRST after reset, internal pull-up resistor enabled"
      },
      {
        "number": "28",
        "name": "PB5",
        "type": "bidirectional",
        "description": "Port B pin 5, 5V tolerant input/output for LPTIM1_IN1 or SPI1_MOSI"
      },
      {
        "number": "29",
        "name": "PB6",
        "type": "bidirectional",
        "description": "Port B pin 6, 5V tolerant input/output with Fm+ capability for USART1_TX or I2C1_SCL"
      },
      {
        "number": "30",
        "name": "PB7",
        "type": "bidirectional",
        "description": "Port B pin 7, 5V tolerant input/output with Fm+ capability for USART1_RX or I2C1_SDA"
      },
      {
        "number": "31",
        "name": "PH3/BOOT0",
        "type": "bidirectional",
        "description": "Port H pin 3, 5V tolerant input/output, functions as BOOT0 for boot mode selection between Flash and system memory"
      },
      {
        "number": "32",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground (0V reference) for digital and analog circuits"
      },
      {
        "number": "33",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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: Pin 5 (VDDA/VREF+) combines analog power supply and positive reference voltage; verify that external; Debug/JTAG pins (23, 24, 25, 26, 27) have alternate functions after reset that should not conflict w; Pin 31 (PH3/BOOT0) function selection depends on voltage level during power-up; confirm boot mode re",
          "exposed pad 33 added from the footprint"
        ],
        "pages_sent": 80,
        "cost_usd": 0.5544,
        "at": "2026-10-06T16:47:18"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893407582294016",
        "pages": 208,
        "sha256": "71963de3cb899f8f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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}