STM32L431CCU6

{
  "slug": "stm32l431ccu6",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-48(7x7). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32l431ccu6",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32l431ccu6.kicad_sym",
    "stm32l431ccu6.kicad_mod",
    "stm32l431ccu6.glb",
    "stm32l431ccu6.step",
    "stm32l431ccu6.lbr",
    "docs/hero.png",
    "docs/stm32l431ccu6-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stm32l431ccu6-hero.glb",
    "stm32l431ccu6-hero.overlay.json"
  ],
  "component": {
    "mpn": "STM32L431CCU6",
    "manufacturer": "STMicroelectronics",
    "package": "UFQFPN-48(7x7)",
    "pin_count": 49,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893825142304768",
    "parts": {
      "symbol": "stm32l431ccu6.kicad_sym",
      "footprint": "stm32l431ccu6.kicad_mod",
      "model_3d": "stm32l431ccu6-hero.glb",
      "model_3d_plain": "stm32l431ccu6.glb",
      "model_3d_step": "stm32l431ccu6-etched.step",
      "model_3d_step_plain": "stm32l431ccu6.step",
      "lbr": "stm32l431ccu6.lbr"
    },
    "distributor_links": {
      "lcsc": 1337258,
      "digikey": "497-17838-ND",
      "mouser": "511-STM32L431CCU6"
    },
    "distributor_check": {
      "checked_at": "2026-10-03T03:01:16Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-17838-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32L431CCU6",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup domain supply for RTC and backup registers, 1.55 V to 3.6 V operating range."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "5 V tolerant I/O supplied through the power switch (limited to 3 mA, max 2 MHz with 30 pF load in output mode); also RTC_TAMP1, RTC_TS, RTC_OUT, WKUP2."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "5 V tolerant I/O on the backup power switch (output mode limited to 2 MHz, 30 pF); LSE crystal input OSC32_IN."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "5 V tolerant I/O on the backup power switch (output mode limited to 2 MHz, 30 pF); LSE crystal output OSC32_OUT."
      },
      {
        "number": "5",
        "name": "PH0-OSC_IN",
        "type": "bidirectional",
        "description": "5 V tolerant I/O, also the HSE oscillator input OSC_IN."
      },
      {
        "number": "6",
        "name": "PH1-OSC_OUT",
        "type": "bidirectional",
        "description": "5 V tolerant I/O, also the HSE oscillator output OSC_OUT."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with embedded weak pull-up resistor."
      },
      {
        "number": "8",
        "name": "VSSA/VREF-",
        "type": "power_in",
        "description": "Analog ground, internally connected to the negative ADC reference VREF- in this package."
      },
      {
        "number": "9",
        "name": "VDDA/VREF+",
        "type": "power_in",
        "description": "Analog supply (1.62 V to 3.6 V for ADC/COMP use), internally connected to the positive reference VREF+ in this package."
      },
      {
        "number": "10",
        "name": "PA0",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with analog switch; TIM2_CH1, USART2_CTS, COMP1_OUT, OPAMP1_VINP, COMP1_INM, ADC1_IN5, RTC_TAMP2, WKUP1."
      },
      {
        "number": "11",
        "name": "PA1",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with analog switch; TIM2_CH2, I2C1_SMBA, SPI1_SCK, USART2_RTS_DE, OPAMP1_VINM, COMP1_INP, ADC1_IN6."
      },
      {
        "number": "12",
        "name": "PA2",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with analog switch; TIM2_CH3, USART2_TX, LPUART1_TX, QUADSPI_BK1_NCS, COMP2_INM, ADC1_IN7, WKUP4, LSCO."
      },
      {
        "number": "13",
        "name": "PA3",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch; TIM2_CH4, USART2_RX, LPUART1_RX, QUADSPI_CLK, OPAMP1_VOUT, COMP2_INP, ADC1_IN8."
      },
      {
        "number": "14",
        "name": "PA4",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch; SPI1_NSS, SPI3_NSS, USART2_CK, COMP1_INM, COMP2_INM, ADC1_IN9, DAC1_OUT1."
      },
      {
        "number": "15",
        "name": "PA5",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch; TIM2_CH1, TIM2_ETR, SPI1_SCK, COMP1_INM, COMP2_INM, ADC1_IN10, DAC1_OUT2."
      },
      {
        "number": "16",
        "name": "PA6",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with analog switch; TIM1_BKIN, SPI1_MISO, COMP1_OUT, USART3_CTS, QUADSPI_BK1_IO3, ADC1_IN11."
      },
      {
        "number": "17",
        "name": "PA7",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O with analog switch; TIM1_CH1N, I2C3_SCL, SPI1_MOSI, QUADSPI_BK1_IO2, ADC1_IN12."
      },
      {
        "number": "18",
        "name": "PB0",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with analog switch; TIM1_CH2N, SPI1_NSS, USART3_CK, QUADSPI_BK1_IO1, ADC1_IN15."
      },
      {
        "number": "19",
        "name": "PB1",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with analog switch; TIM1_CH3N, USART3_RTS_DE, LPUART1_RTS_DE, QUADSPI_BK1_IO0, COMP1_INM, ADC1_IN16."
      },
      {
        "number": "20",
        "name": "PB2",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with analog switch; RTC_OUT, LPTIM1_OUT, I2C3_SMBA, COMP1_INP."
      },
      {
        "number": "21",
        "name": "PB10",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O; TIM2_CH3, I2C2_SCL, SPI2_SCK, USART3_TX, LPUART1_RX, TSC_SYNC, QUADSPI_CLK, SAI1_SCK_A."
      },
      {
        "number": "22",
        "name": "PB11",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O; TIM2_CH4, I2C2_SDA, USART3_RX, LPUART1_TX, QUADSPI_BK1_NCS, COMP2_OUT."
      },
      {
        "number": "23",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground supply pin."
      },
      {
        "number": "24",
        "name": "VDD",
        "type": "power_in",
        "description": "Main digital supply, 1.71 V to 3.6 V."
      },
      {
        "number": "25",
        "name": "PB12",
        "type": "bidirectional",
        "description": "5 V tolerant I/O; TIM1_BKIN, I2C2_SMBA, SPI2_NSS, USART3_CK, LPUART1_RTS_DE, TSC_G1_IO1, SWPMI1_IO, SAI1_FS_A."
      },
      {
        "number": "26",
        "name": "PB13",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O; TIM1_CH1N, I2C2_SCL, SPI2_SCK, USART3_CTS, LPUART1_CTS, TSC_G1_IO2, SWPMI1_TX, SAI1_SCK_A."
      },
      {
        "number": "27",
        "name": "PB14",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O; TIM1_CH2N, I2C2_SDA, SPI2_MISO, USART3_RTS_DE, TSC_G1_IO3, SWPMI1_RX, SAI1_MCLK_A."
      },
      {
        "number": "28",
        "name": "PB15",
        "type": "bidirectional",
        "description": "5 V tolerant I/O; RTC_REFIN, TIM1_CH3N, SPI2_MOSI, TSC_G1_IO4, SWPMI1_SUSPEND, SAI1_SD_A."
      },
      {
        "number": "29",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V tolerant I/O; MCO, TIM1_CH1, USART1_CK, SWPMI1_IO, SAI1_SCK_A, LPTIM2_OUT."
      },
      {
        "number": "30",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O; TIM1_CH2, I2C1_SCL, USART1_TX, SAI1_FS_A, TIM15_BKIN."
      },
      {
        "number": "31",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O; TIM1_CH3, I2C1_SDA, USART1_RX, SAI1_SD_A."
      },
      {
        "number": "32",
        "name": "PA11",
        "type": "bidirectional",
        "description": "5 V tolerant I/O; TIM1_CH4, TIM1_BKIN2, SPI1_MISO, COMP1_OUT, USART1_CTS, CAN1_RX."
      },
      {
        "number": "33",
        "name": "PA12",
        "type": "bidirectional",
        "description": "5 V tolerant I/O; TIM1_ETR, SPI1_MOSI, USART1_RTS_DE, CAN1_TX."
      },
      {
        "number": "34",
        "name": "PA13 (JTMS-SWDIO)",
        "type": "bidirectional",
        "description": "5 V tolerant I/O configured as JTMS-SWDIO after reset with internal pull-up active; also IR_OUT, SWPMI1_TX, SAI1_SD_B."
      },
      {
        "number": "35",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground supply pin."
      },
      {
        "number": "36",
        "name": "VDD",
        "type": "power_in",
        "description": "Main digital supply, 1.71 V to 3.6 V."
      },
      {
        "number": "37",
        "name": "PA14 (JTCK-SWCLK)",
        "type": "bidirectional",
        "description": "5 V tolerant I/O configured as JTCK-SWCLK after reset with internal pull-down active; also LPTIM1_OUT, I2C1_SMBA, SWPMI1_RX, SAI1_FS_B."
      },
      {
        "number": "38",
        "name": "PA15 (JTDI)",
        "type": "bidirectional",
        "description": "5 V tolerant I/O configured as JTDI after reset with internal pull-up active; also TIM2_CH1, USART2_RX, SPI1_NSS, SPI3_NSS, TSC_G3_IO1."
      },
      {
        "number": "39",
        "name": "PB3 (JTDO-TRACESWO)",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with analog switch, JTDO-TRACESWO after reset; TIM2_CH2, SPI1_SCK, SPI3_SCK, USART1_RTS_DE, SAI1_SCK_B, COMP2_INM."
      },
      {
        "number": "40",
        "name": "PB4 (NJTRST)",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O with analog switch, NJTRST after reset with internal pull-up active; I2C3_SDA, SPI1_MISO, SPI3_MISO, USART1_CTS, COMP2_INP."
      },
      {
        "number": "41",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V tolerant I/O; LPTIM1_IN1, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI, USART1_CK, COMP2_OUT, SAI1_SD_B, TIM16_BKIN."
      },
      {
        "number": "42",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O with analog switch; LPTIM1_ETR, I2C1_SCL, USART1_TX, SAI1_FS_B, TIM16_CH1N, COMP2_INP."
      },
      {
        "number": "43",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O with analog switch; LPTIM1_IN2, I2C1_SDA, USART1_RX, COMP2_INM, PVD_IN."
      },
      {
        "number": "44",
        "name": "PH3/BOOT0",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (PH3) that also serves as the BOOT0 boot-mode pin."
      },
      {
        "number": "45",
        "name": "PB8",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O; I2C1_SCL, CAN1_RX, SDMMC1_D4, SAI1_MCLK_A, TIM16_CH1."
      },
      {
        "number": "46",
        "name": "PB9",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O; IR_OUT, I2C1_SDA, SPI2_NSS, CAN1_TX, SDMMC1_D5, SAI1_FS_A."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground supply pin."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_in",
        "description": "Main digital supply, 1.71 V to 3.6 V."
      },
      {
        "number": "49",
        "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: PC13, PC14, PC15 pins (2,3,4) have reduced drive capability (3mA max) and speed limitation (2MHz max; JTAG/SWD pins (PA13, PA14, PA15, PB3, PB4) pins (27, 48, 47, 46, 45) have specific pull-up/pull-down",
          "exposed pad 49 added from the footprint"
        ],
        "pages_sent": 80,
        "cost_usd": 0.5211,
        "at": "2026-10-03T03:00:53"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893825142304768",
        "pages": 208,
        "sha256": "71963de3cb899f8f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 49,
        "described": 49,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    }
  }
}