STM32L431RCI6

{
  "slug": "stm32l431rci6",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFBGA-64. Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32l431rci6",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32l431rci6.kicad_sym",
    "stm32l431rci6.kicad_mod",
    "stm32l431rci6.glb",
    "stm32l431rci6.step",
    "stm32l431rci6.lbr",
    "docs/hero.png",
    "docs/stm32l431rci6-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stm32l431rci6-hero.glb",
    "stm32l431rci6-hero.overlay.json"
  ],
  "component": {
    "mpn": "STM32L431RCI6",
    "manufacturer": "STMicroelectronics",
    "package": "UFBGA-64",
    "pin_count": 64,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588952459330510848",
    "parts": {
      "symbol": "stm32l431rci6.kicad_sym",
      "footprint": "stm32l431rci6.kicad_mod",
      "model_3d": "stm32l431rci6-hero.glb",
      "model_3d_plain": "stm32l431rci6.glb",
      "model_3d_step": "stm32l431rci6-etched.step",
      "model_3d_step_plain": "stm32l431rci6.step",
      "lbr": "stm32l431rci6.lbr"
    },
    "distributor_links": {
      "lcsc": "C1338732",
      "digikey": "497-16838-ND",
      "mouser": "511-STM32L431RCI6"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T02:03:45Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-16838-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32L431RCI6",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "A1",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) supplied through the power switch with a 3 mA sink limit, so output use is limited to 2 MHz with 30 pF and it must not source current such as an LED; also the LSE oscillator input OSC32_IN."
      },
      {
        "number": "A2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) supplied through the power switch with a 3 mA sink limit, so output use is limited to 2 MHz with 30 pF and it must not source current such as an LED; also RTC_TAMP1, RTC_TS, RTC_OUT and WKUP2."
      },
      {
        "number": "A3",
        "name": "PB9",
        "type": "bidirectional",
        "description": "FT_f I/O (5 V tolerant, Fm+ capable) with alternate functions including IR_OUT, I2C1_SDA, SPI2_NSS, CAN1_TX, SDMMC1_D5 and SAI1_FS_A."
      },
      {
        "number": "A4",
        "name": "PB4",
        "type": "bidirectional",
        "description": "FT_fa I/O (5 V tolerant, Fm+ capable, analog switch supplied by VDDA) that is configured as NJTRST with an internal pull-up after reset; alternate functions include I2C3_SDA, SPI1_MISO, SPI3_MISO, USART1_CTS and TSC_G2_IO1."
      },
      {
        "number": "A5",
        "name": "PB3",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) that is configured as the JTDO-TRACESWO debug function after reset; alternate functions include TIM2_CH2, SPI1_SCK, SPI3_SCK and USART1_RTS_DE."
      },
      {
        "number": "A6",
        "name": "PA15",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) that is configured as JTDI with an internal pull-up after reset; alternate functions include TIM2_CH1, TIM2_ETR, USART2_RX, SPI1_NSS and SPI3_NSS."
      },
      {
        "number": "A7",
        "name": "PA14",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) that is configured as JTCK-SWCLK with an internal pull-down after reset; alternate functions include LPTIM1_OUT, I2C1_SMBA, SWPMI1_RX and SAI1_FS_B."
      },
      {
        "number": "A8",
        "name": "PA13",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) that is configured as JTMS-SWDIO with an internal pull-up after reset; alternate functions include IR_OUT, SWPMI1_TX and SAI1_SD_B."
      },
      {
        "number": "B1",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) supplied through the power switch with a 3 mA sink limit, so output use is limited to 2 MHz with 30 pF and it must not source current such as an LED; also the LSE oscillator output OSC32_OUT."
      },
      {
        "number": "B2",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup domain supply for the RTC and 32x32-bit backup registers, with an operating range of 1.55 V to 3.6 V."
      },
      {
        "number": "B3",
        "name": "PB8",
        "type": "bidirectional",
        "description": "FT_f I/O (5 V tolerant, Fm+ capable) with alternate functions including I2C1_SCL, CAN1_RX, SDMMC1_D4, SAI1_MCLK_A and TIM16_CH1."
      },
      {
        "number": "B4",
        "name": "PH3/BOOT0",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) that is also used as the BOOT0 boot-configuration pin, with EVENTOUT as an alternate function."
      },
      {
        "number": "B5",
        "name": "PD2",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including USART3_RTS_DE, TSC_SYNC, SDMMC1_CMD and EVENTOUT."
      },
      {
        "number": "B6",
        "name": "PC11",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including SPI3_MISO, USART3_RX, TSC_G3_IO3 and SDMMC1_D3."
      },
      {
        "number": "B7",
        "name": "PC10",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including SPI3_SCK, USART3_TX, TSC_G3_IO2 and SDMMC1_D2."
      },
      {
        "number": "B8",
        "name": "PA12",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including TIM1_ETR, SPI1_MOSI, USART1_RTS_DE and CAN1_TX."
      },
      {
        "number": "C1",
        "name": "PH0-OSC_IN",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) that is also the HSE oscillator input OSC_IN, with EVENTOUT as an alternate function."
      },
      {
        "number": "C2",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the external ground within the permitted range."
      },
      {
        "number": "C3",
        "name": "PB7",
        "type": "bidirectional",
        "description": "FT_fa I/O (5 V tolerant, analog switch supplied by VDDA) with alternate functions including LPTIM1_IN2, I2C1_SDA, USART1_RX and TSC_G2_IO4; additional functions COMP2_INM and PVD_IN."
      },
      {
        "number": "C4",
        "name": "PB5",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including LPTIM1_IN1, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI, USART1_CK, TSC_G2_IO2, COMP2_OUT, SAI1_SD_B and TIM16_BKIN."
      },
      {
        "number": "C5",
        "name": "PC12",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including SPI3_MOSI, USART3_CK, TSC_G3_IO4 and SDMMC1_CK."
      },
      {
        "number": "C6",
        "name": "PA10",
        "type": "bidirectional",
        "description": "FT_f I/O (5 V tolerant, Fm+ capable) with alternate functions including TIM1_CH3, I2C1_SDA, USART1_RX and SAI1_SD_A."
      },
      {
        "number": "C7",
        "name": "PA9",
        "type": "bidirectional",
        "description": "FT_f I/O (5 V tolerant, Fm+ capable) with alternate functions including TIM1_CH2, I2C1_SCL, USART1_TX, SAI1_FS_A and TIM15_BKIN."
      },
      {
        "number": "C8",
        "name": "PA11",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including TIM1_CH4, TIM1_BKIN2, SPI1_MISO, COMP1_OUT, USART1_CTS and CAN1_RX."
      },
      {
        "number": "D1",
        "name": "PH1-OSC_OUT",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) that is also the HSE oscillator output OSC_OUT, with EVENTOUT as an alternate function."
      },
      {
        "number": "D2",
        "name": "VDD",
        "type": "power_in",
        "description": "Standard operating voltage supply, 1.71 V to 3.6 V; all VDD pins must be connected to the external power supply."
      },
      {
        "number": "D3",
        "name": "PB6",
        "type": "bidirectional",
        "description": "FT_fa I/O (5 V tolerant, Fm+ capable, analog switch supplied by VDDA) with alternate functions including LPTIM1_ETR, I2C1_SCL, USART1_TX, TSC_G2_IO3 and SAI1_FS_B; additional function COMP2_INP."
      },
      {
        "number": "D4",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the external ground within the permitted range."
      },
      {
        "number": "D5",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the external ground within the permitted range."
      },
      {
        "number": "D6",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the external ground within the permitted range."
      },
      {
        "number": "D7",
        "name": "PA8",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including MCO, TIM1_CH1, USART1_CK, SWPMI1_IO, SAI1_SCK_A and LPTIM2_OUT."
      },
      {
        "number": "D8",
        "name": "PC9",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including TSC_G4_IO4, SDMMC1_D1 and EVENTOUT."
      },
      {
        "number": "E1",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with an embedded weak pull-up resistor."
      },
      {
        "number": "E2",
        "name": "PC1",
        "type": "bidirectional",
        "description": "FT_fa I/O (5 V tolerant, Fm+ capable, analog switch supplied by VDDA) with alternate functions including LPTIM1_OUT, I2C3_SDA and LPUART1_TX; additional function ADC1_IN2."
      },
      {
        "number": "E3",
        "name": "PC0",
        "type": "bidirectional",
        "description": "FT_fa I/O (5 V tolerant, Fm+ capable, analog switch supplied by VDDA) with alternate functions including LPTIM1_IN1, I2C3_SCL, LPUART1_RX and LPTIM2_IN1; additional function ADC1_IN1."
      },
      {
        "number": "E4",
        "name": "VDD",
        "type": "power_in",
        "description": "Standard operating voltage supply, 1.71 V to 3.6 V; all VDD pins must be connected to the external power supply."
      },
      {
        "number": "E5",
        "name": "VDD",
        "type": "power_in",
        "description": "Standard operating voltage supply, 1.71 V to 3.6 V; all VDD pins must be connected to the external power supply."
      },
      {
        "number": "E6",
        "name": "VDD",
        "type": "power_in",
        "description": "Standard operating voltage supply, 1.71 V to 3.6 V; all VDD pins must be connected to the external power supply."
      },
      {
        "number": "E7",
        "name": "PC7",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including TSC_G4_IO2, SDMMC1_D7 and EVENTOUT."
      },
      {
        "number": "E8",
        "name": "PC8",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including TSC_G4_IO3, SDMMC1_D0 and EVENTOUT."
      },
      {
        "number": "F1",
        "name": "VSSA/VREF-",
        "type": "power_in",
        "description": "Analog ground and negative ADC reference VREF-; VREF- can be internally connected to VSSA depending on the package."
      },
      {
        "number": "F2",
        "name": "PC2",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) with alternate functions including LPTIM1_IN2 and SPI2_MISO; additional function ADC1_IN3."
      },
      {
        "number": "F3",
        "name": "PA2",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) with alternate functions including TIM2_CH3, USART2_TX, LPUART1_TX, QUADSPI_BK1_NCS and COMP2_OUT; additional functions COMP2_INM, ADC1_IN7, WKUP4 and LSCO."
      },
      {
        "number": "F4",
        "name": "PA5",
        "type": "bidirectional",
        "description": "TT_a I/O (3.6 V tolerant, analog switch supplied by VDDA) with alternate functions including TIM2_CH1, TIM2_ETR, SPI1_SCK and LPTIM2_ETR; additional functions COMP1_INM, COMP2_INM, ADC1_IN10 and DAC1_OUT2."
      },
      {
        "number": "F5",
        "name": "PB0",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) with alternate functions including TIM1_CH2N, SPI1_NSS, USART3_CK, QUADSPI_BK1_IO1, COMP1_OUT and SAI1_EXTCLK; additional function ADC1_IN15."
      },
      {
        "number": "F6",
        "name": "PC6",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including TSC_G4_IO1, SDMMC1_D6 and EVENTOUT."
      },
      {
        "number": "F7",
        "name": "PB15",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including RTC_REFIN, TIM1_CH3N, SPI2_MOSI, TSC_G1_IO4, SWPMI1_SUSPEND, SAI1_SD_A and TIM15_CH2."
      },
      {
        "number": "F8",
        "name": "PB14",
        "type": "bidirectional",
        "description": "FT_f I/O (5 V tolerant, Fm+ capable) with alternate functions including TIM1_CH2N, I2C2_SDA, SPI2_MISO, USART3_RTS_DE, TSC_G1_IO3 and TIM15_CH1."
      },
      {
        "number": "G1",
        "name": "PC3",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) with alternate functions including LPTIM1_ETR, SPI2_MOSI, SAI1_SD_A and LPTIM2_ETR; additional function ADC1_IN4."
      },
      {
        "number": "G2",
        "name": "PA0",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) with alternate functions including TIM2_CH1, USART2_CTS, COMP1_OUT, SAI1_EXTCLK and TIM2_ETR; additional functions OPAMP1_VINP, COMP1_INM, ADC1_IN5, RTC_TAMP2 and WKUP1."
      },
      {
        "number": "G3",
        "name": "PA3",
        "type": "bidirectional",
        "description": "TT_a I/O (3.6 V tolerant, analog switch supplied by VDDA) with alternate functions including TIM2_CH4, USART2_RX, LPUART1_RX, QUADSPI_CLK, SAI1_MCLK_A and TIM15_CH2; additional functions OPAMP1_VOUT, COMP2_INP and ADC1_IN8."
      },
      {
        "number": "G4",
        "name": "PA6",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) with alternate functions including TIM1_BKIN, SPI1_MISO, COMP1_OUT, USART3_CTS, LPUART1_CTS, QUADSPI_BK1_IO3 and TIM16_CH1; additional function ADC1_IN11."
      },
      {
        "number": "G5",
        "name": "PB1",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) with alternate functions including TIM1_CH3N, USART3_RTS_DE, LPUART1_RTS_DE, QUADSPI_BK1_IO0 and LPTIM2_IN1; additional functions COMP1_INM and ADC1_IN16."
      },
      {
        "number": "G6",
        "name": "PB2",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) with alternate functions including RTC_OUT, LPTIM1_OUT and I2C3_SMBA; additional function COMP1_INP."
      },
      {
        "number": "G7",
        "name": "PB10",
        "type": "bidirectional",
        "description": "FT_f I/O (5 V tolerant, Fm+ capable) with alternate functions including TIM2_CH3, I2C2_SCL, SPI2_SCK, USART3_TX, LPUART1_RX, TSC_SYNC, QUADSPI_CLK, COMP1_OUT and SAI1_SCK_A."
      },
      {
        "number": "G8",
        "name": "PB13",
        "type": "bidirectional",
        "description": "FT_f I/O (5 V tolerant, Fm+ capable) with alternate functions including TIM1_CH1N, I2C2_SCL, SPI2_SCK, USART3_CTS, LPUART1_CTS, TSC_G1_IO2, SWPMI1_TX, SAI1_SCK_A and TIM15_CH1N."
      },
      {
        "number": "H1",
        "name": "VDDA/VREF+",
        "type": "power_in",
        "description": "Analog supply VDDA (1.62 V to 3.6 V when ADC or COMP is used) combined with the positive reference VREF+; VREF+ can be internally connected to VDDA depending on the package."
      },
      {
        "number": "H2",
        "name": "PA1",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) with alternate functions including TIM2_CH2, I2C1_SMBA, SPI1_SCK, USART2_RTS_DE and TIM15_CH1N; additional functions OPAMP1_VINM, COMP1_INP and ADC1_IN6."
      },
      {
        "number": "H3",
        "name": "PA4",
        "type": "bidirectional",
        "description": "TT_a I/O (3.6 V tolerant, analog switch supplied by VDDA) with alternate functions including SPI1_NSS, SPI3_NSS, USART2_CK, SAI1_FS_B and LPTIM2_OUT; additional functions COMP1_INM, COMP2_INM, ADC1_IN9 and DAC1_OUT1."
      },
      {
        "number": "H4",
        "name": "PA7",
        "type": "bidirectional",
        "description": "FT_fa I/O (5 V tolerant, Fm+ capable, analog switch supplied by VDDA) with alternate functions including TIM1_CH1N, I2C3_SCL, SPI1_MOSI, QUADSPI_BK1_IO2 and COMP2_OUT; additional function ADC1_IN12."
      },
      {
        "number": "H5",
        "name": "PC4",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) with alternate function USART3_TX; additional functions COMP1_INM and ADC1_IN13."
      },
      {
        "number": "H6",
        "name": "PC5",
        "type": "bidirectional",
        "description": "FT_a I/O (5 V tolerant, analog switch supplied by VDDA) with alternate function USART3_RX; additional functions COMP1_INP, ADC1_IN14 and WKUP5."
      },
      {
        "number": "H7",
        "name": "PB11",
        "type": "bidirectional",
        "description": "FT_f I/O (5 V tolerant, Fm+ capable) with alternate functions including TIM2_CH4, I2C2_SDA, USART3_RX, LPUART1_TX, QUADSPI_BK1_NCS and COMP2_OUT."
      },
      {
        "number": "H8",
        "name": "PB12",
        "type": "bidirectional",
        "description": "FT I/O (5 V tolerant) with alternate functions including TIM1_BKIN, TIM1_BKIN_COMP2, I2C2_SMBA, SPI2_NSS, USART3_CK, LPUART1_RTS_DE, TSC_G1_IO1, SWPMI1_IO, SAI1_FS_A and TIM15_BKIN."
      }
    ],
    "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: Figure 9 (UFBGA64 ballout) text is not cleanly extractable from the provided pages. Ball-to-pin mapp; Pin types are mapped to KiCad classes: I/O pins as bidirectional, supply pins as power_in (GND and s; PC13, PC14 and PC15 are supplied through the power switch (3 mA sink limit). The datasheet limits th"
        ],
        "pages_sent": 80,
        "cost_usd": 0.4755,
        "at": "2026-10-11T02:03:30"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588952459330510848",
        "pages": 208,
        "sha256": "71963de3cb899f8f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 64,
        "described": 64,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "stm32l431rci6.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          0.756
        ],
        "zmin_mm": -0.006,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "2f49e811f614ad2ee15508cecac786db8987d46925c72898fe5072a5814fff1e",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stm32l431rci6-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": -0.006,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "51a489a7d387e33b1a2a38f97e7df08a79bbae239d73d1204401be7091357c7e",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}