STM32L431RCT6TR

{
  "schema_version": 1,
  "type": "component",
  "slug": "stm32l431rct6tr",
  "title": "STM32L431RCT6TR",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "mcu",
    "stm32l431rct6tr"
  ],
  "component": {
    "mpn": "STM32L431RCT6TR",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-64(10x10)",
    "pin_count": 64,
    "category": "MCU",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://www.st.com/resource/en/datasheet/stm32l431rct6tr.pdf",
    "parts": {
      "symbol": "stm32l431rct6tr.kicad_sym",
      "footprint": "stm32l431rct6tr.kicad_mod",
      "model_3d": "stm32l431rct6tr-etched.glb",
      "model_3d_plain": "stm32l431rct6tr.glb",
      "model_3d_step": "stm32l431rct6tr-etched.step",
      "model_3d_step_plain": "stm32l431rct6tr.step",
      "lbr": "stm32l431rct6tr.lbr"
    },
    "distributor_links": {
      "digikey": "497-STM32L431RCT6TR-ND",
      "lcsc": "C529447"
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup battery supply for RTC and 32x32-bit backup registers. Typical 1.55 V to 3.6 V; ~200 nA in VBAT mode."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "GPIO PC13 (FT). Alt: EVENTOUT. Additional: RTC_TAMP1, RTC_TS, RTC_OUT, WKUP2."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "GPIO PC14 / LSE 32 kHz oscillator input (OSC32_IN). Muxed via RCC."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "GPIO PC15 / LSE 32 kHz oscillator output (OSC32_OUT)."
      },
      {
        "number": "5",
        "name": "PH0-OSC_IN",
        "type": "bidirectional",
        "description": "GPIO PH0 / HSE crystal oscillator input (OSC_IN)."
      },
      {
        "number": "6",
        "name": "PH1-OSC_OUT",
        "type": "bidirectional",
        "description": "GPIO PH1 / HSE crystal oscillator output (OSC_OUT)."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin, active low. Internal pull-up; driven low by MCU on internal reset sources."
      },
      {
        "number": "8",
        "name": "PC0",
        "type": "bidirectional",
        "description": "GPIO PC0 (FT_fa). Alt: LPTIM1_IN1, I2C3_SCL, LPUART1_RX, LPTIM2_IN1, EVENTOUT. Additional: ADC1_IN1."
      },
      {
        "number": "9",
        "name": "PC1",
        "type": "bidirectional",
        "description": "GPIO PC1 (FT_fa). Alt: LPTIM1_OUT, I2C3_SDA, LPUART1_TX, EVENTOUT. Additional: ADC1_IN2."
      },
      {
        "number": "10",
        "name": "PC2",
        "type": "bidirectional",
        "description": "GPIO PC2 (FT_a). Alt: LPTIM1_IN2, SPI2_MISO, EVENTOUT. Additional: ADC1_IN3."
      },
      {
        "number": "11",
        "name": "PC3",
        "type": "bidirectional",
        "description": "GPIO PC3 (FT_a). Alt: LPTIM1_ETR, SPI2_MOSI, SAI1_SD_A, LPTIM2_ETR, EVENTOUT. Additional: ADC1_IN4."
      },
      {
        "number": "12",
        "name": "VSSA/VREF-",
        "type": "power_in",
        "description": "Analog ground and negative ADC/DAC reference (tied together on this package)."
      },
      {
        "number": "13",
        "name": "VDDA/VREF+",
        "type": "power_in",
        "description": "Analog supply and positive ADC/DAC reference input, 1.62 V to 3.6 V."
      },
      {
        "number": "14",
        "name": "PA0",
        "type": "bidirectional",
        "description": "GPIO PA0 (FT_a). Alt: TIM2_CH1, USART2_CTS, COMP1_OUT, SAI1_EXTCLK, TIM2_ETR, EVENTOUT. Additional: OPAMP1_VINP, COMP1_INM, ADC1_IN5, RTC_TAMP2, WKUP1."
      },
      {
        "number": "15",
        "name": "PA1",
        "type": "bidirectional",
        "description": "GPIO PA1 (FT_a). Alt: TIM2_CH2, I2C1_SMBA, SPI1_SCK, USART2_RTS_DE, TIM15_CH1N, EVENTOUT. Additional: OPAMP1_VINM, COMP1_INP, ADC1_IN6."
      },
      {
        "number": "16",
        "name": "PA2",
        "type": "bidirectional",
        "description": "GPIO PA2 (FT_a). Alt: TIM2_CH3, USART2_TX, LPUART1_TX, QUADSPI_BK1_NCS, COMP2_OUT, TIM15_CH1, EVENTOUT. Additional: COMP2_INM, ADC1_IN7, WKUP4, LSCO."
      },
      {
        "number": "17",
        "name": "PA3",
        "type": "bidirectional",
        "description": "GPIO PA3 (TT_a). Alt: TIM2_CH4, USART2_RX, LPUART1_RX, QUADSPI_CLK, SAI1_MCLK_A, TIM15_CH2, EVENTOUT. Additional: OPAMP1_VOUT, COMP2_INP, ADC1_IN8."
      },
      {
        "number": "18",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "19",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply, 1.71 V to 3.6 V."
      },
      {
        "number": "20",
        "name": "PA4",
        "type": "bidirectional",
        "description": "GPIO PA4 (TT_a). Alt: SPI1_NSS, SPI3_NSS, USART2_CK, SAI1_FS_B, LPTIM2_OUT, EVENTOUT. Additional: COMP1_INM, COMP2_INM, ADC1_IN9, DAC1_OUT1."
      },
      {
        "number": "21",
        "name": "PA5",
        "type": "bidirectional",
        "description": "GPIO PA5 (TT_a). Alt: TIM2_CH1, TIM2_ETR, SPI1_SCK, LPTIM2_ETR, EVENTOUT. Additional: COMP1_INM, COMP2_INM, ADC1_IN10, DAC1_OUT2."
      },
      {
        "number": "22",
        "name": "PA6",
        "type": "bidirectional",
        "description": "GPIO PA6 (FT_a). Alt: TIM1_BKIN, SPI1_MISO, COMP1_OUT, USART3_CTS, LPUART1_CTS, QUADSPI_BK1_IO3, TIM16_CH1, EVENTOUT. Additional: ADC1_IN11."
      },
      {
        "number": "23",
        "name": "PA7",
        "type": "bidirectional",
        "description": "GPIO PA7 (FT_a). Alt: TIM1_CH1N, SPI1_MOSI, QUADSPI_BK1_IO2, TIM17_CH1, EVENTOUT. Additional: COMP2_INP, ADC1_IN12."
      },
      {
        "number": "24",
        "name": "PC4",
        "type": "bidirectional",
        "description": "GPIO PC4 (FT_a). Alt: USART3_TX, EVENTOUT. Additional: ADC1_IN13."
      },
      {
        "number": "25",
        "name": "PC5",
        "type": "bidirectional",
        "description": "GPIO PC5 (FT_a). Alt: USART3_RX, EVENTOUT. Additional: WKUP5, ADC1_IN14."
      },
      {
        "number": "26",
        "name": "PB0",
        "type": "bidirectional",
        "description": "GPIO PB0 (FT_a). Alt: TIM1_CH2N, SPI1_NSS, USART3_CK, QUADSPI_BK1_IO1, SAI1_EXTCLK, COMP1_OUT, EVENTOUT. Additional: ADC1_IN15."
      },
      {
        "number": "27",
        "name": "PB1",
        "type": "bidirectional",
        "description": "GPIO PB1 (FT_a). Alt: TIM1_CH3N, USART3_RTS_DE, LPUART1_RTS_DE, QUADSPI_BK1_IO0, LPTIM2_IN1, EVENTOUT. Additional: ADC1_IN16."
      },
      {
        "number": "28",
        "name": "PB2",
        "type": "bidirectional",
        "description": "GPIO PB2 (FT). Alt: RTC_OUT, LPTIM1_OUT, I2C3_SMBA, EVENTOUT."
      },
      {
        "number": "29",
        "name": "PB10",
        "type": "bidirectional",
        "description": "GPIO PB10 (FT_f). Alt: TIM2_CH3, I2C2_SCL, SPI2_SCK, USART3_TX, LPUART1_RX, QUADSPI_CLK, SAI1_SCK_A, COMP1_OUT, EVENTOUT."
      },
      {
        "number": "30",
        "name": "PB11",
        "type": "bidirectional",
        "description": "GPIO PB11 (FT_f). Alt: TIM2_CH4, I2C2_SDA, USART3_RX, LPUART1_TX, QUADSPI_BK1_NCS, COMP2_OUT, EVENTOUT."
      },
      {
        "number": "31",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "32",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply, 1.71 V to 3.6 V."
      },
      {
        "number": "33",
        "name": "PB12",
        "type": "bidirectional",
        "description": "GPIO PB12 (FT_fa). Alt: TIM1_BKIN, SPI2_NSS, USART3_CK, LPUART1_RTS_DE, SAI1_FS_A, TSC_G1_IO1, EVENTOUT. Additional: COMP2_INP."
      },
      {
        "number": "34",
        "name": "PB13",
        "type": "bidirectional",
        "description": "GPIO PB13 (FT_fa). Alt: TIM1_CH1N, I2C2_SCL, SPI2_SCK, USART3_CTS, LPUART1_CTS, SAI1_SCK_A, TSC_G1_IO2, EVENTOUT. Additional: COMP2_INM."
      },
      {
        "number": "35",
        "name": "PB14",
        "type": "bidirectional",
        "description": "GPIO PB14 (FT_fa). Alt: TIM1_CH2N, I2C2_SDA, SPI2_MISO, USART3_RTS_DE, SAI1_MCLK_A, TSC_G1_IO3, TIM15_CH1, EVENTOUT. Additional: COMP2_INP."
      },
      {
        "number": "36",
        "name": "PB15",
        "type": "bidirectional",
        "description": "GPIO PB15 (FT_fa). Alt: RTC_REFIN, TIM1_CH3N, SPI2_MOSI, SAI1_SD_A, TSC_G1_IO4, TIM15_CH2, EVENTOUT. Additional: COMP2_INM."
      },
      {
        "number": "37",
        "name": "PC6",
        "type": "bidirectional",
        "description": "GPIO PC6 (FT). Alt: TSC_G4_IO1, EVENTOUT."
      },
      {
        "number": "38",
        "name": "PC7",
        "type": "bidirectional",
        "description": "GPIO PC7 (FT). Alt: TSC_G4_IO2, EVENTOUT."
      },
      {
        "number": "39",
        "name": "PC8",
        "type": "bidirectional",
        "description": "GPIO PC8 (FT). Alt: TSC_G4_IO3, EVENTOUT."
      },
      {
        "number": "40",
        "name": "PC9",
        "type": "bidirectional",
        "description": "GPIO PC9 (FT). Alt: TIM8_BKIN2, I2C3_SDA, SAI1_D_A, TSC_G4_IO4, EVENTOUT."
      },
      {
        "number": "41",
        "name": "PA8",
        "type": "bidirectional",
        "description": "GPIO PA8 (FT). Alt: MCO, TIM1_CH1, USART1_CK, SAI1_SCK_A, LPTIM2_OUT, SWPMI1_IO1, EVENTOUT."
      },
      {
        "number": "42",
        "name": "PA9",
        "type": "bidirectional",
        "description": "GPIO PA9 (FT_f). Alt: TIM1_CH2, I2C1_SCL, USART1_TX, SAI1_FS_A, TIM15_BKIN, EVENTOUT."
      },
      {
        "number": "43",
        "name": "PA10",
        "type": "bidirectional",
        "description": "GPIO PA10 (FT_f). Alt: TIM1_CH3, I2C1_SDA, USART1_RX, SAI1_SD_A, EVENTOUT."
      },
      {
        "number": "44",
        "name": "PA11",
        "type": "bidirectional",
        "description": "GPIO PA11 (FT). Alt: TIM1_CH4, TIM1_BKIN2, SPI1_MISO, USART1_CTS, CAN1_RX, EVENTOUT."
      },
      {
        "number": "45",
        "name": "PA12",
        "type": "bidirectional",
        "description": "GPIO PA12 (FT). Alt: TIM1_ETR, SPI1_MOSI, USART1_RTS_DE, CAN1_TX, EVENTOUT."
      },
      {
        "number": "46",
        "name": "PA13",
        "type": "bidirectional",
        "description": "GPIO PA13 (FT). Default SWDIO after reset. Alt: JTMS-SWDIO, IR_OUT, SWPMI1_TX, EVENTOUT."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply, 1.71 V to 3.6 V."
      },
      {
        "number": "49",
        "name": "PA14",
        "type": "bidirectional",
        "description": "GPIO PA14 (FT). Default SWCLK after reset. Alt: JTCK-SWCLK, LPTIM1_OUT, SWPMI1_RX, EVENTOUT."
      },
      {
        "number": "50",
        "name": "PA15",
        "type": "bidirectional",
        "description": "GPIO PA15 (FT). Default JTDI after reset. Alt: JTDI, TIM2_CH1, TIM2_ETR, USART2_RX, USART3_RTS_DE, SPI1_NSS, SPI3_NSS, TSC_G3_IO1, SWPMI1_SUSPEND, EVENTOUT."
      },
      {
        "number": "51",
        "name": "PC10",
        "type": "bidirectional",
        "description": "GPIO PC10 (FT). Alt: SPI3_SCK, USART3_TX, LPUART1_TX, SAI1_D_A, TSC_G3_IO2, EVENTOUT."
      },
      {
        "number": "52",
        "name": "PC11",
        "type": "bidirectional",
        "description": "GPIO PC11 (FT). Alt: SPI3_MISO, USART3_RX, LPUART1_RX, TSC_G3_IO3, EVENTOUT."
      },
      {
        "number": "53",
        "name": "PC12",
        "type": "bidirectional",
        "description": "GPIO PC12 (FT). Alt: SPI3_MOSI, USART3_CK, SAI1_D_A, TSC_G3_IO4, EVENTOUT."
      },
      {
        "number": "54",
        "name": "PD2",
        "type": "bidirectional",
        "description": "GPIO PD2 (FT). Alt: TIM3_ETR, USART3_RTS_DE, EVENTOUT."
      },
      {
        "number": "55",
        "name": "PB3",
        "type": "bidirectional",
        "description": "GPIO PB3 (FT). Default JTDO/TRACESWO after reset. Alt: JTDO-TRACESWO, TIM2_CH2, SPI1_SCK, SPI3_SCK, USART1_RTS_DE, SAI1_SCK_B, EVENTOUT."
      },
      {
        "number": "56",
        "name": "PB4",
        "type": "bidirectional",
        "description": "GPIO PB4 (FT). Default NJTRST after reset. Alt: NJTRST, TIM3_CH1, SPI1_MISO, SPI3_MISO, USART1_CTS, TSC_G2_IO1, SAI1_MCLK_B, TIM17_BKIN, EVENTOUT."
      },
      {
        "number": "57",
        "name": "PB5",
        "type": "bidirectional",
        "description": "GPIO PB5 (FT). Alt: LPTIM1_IN1, TIM3_CH2, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI, USART1_CK, CAN2_RX, TSC_G2_IO2, SAI1_SD_B, TIM16_BKIN, EVENTOUT."
      },
      {
        "number": "58",
        "name": "PB6",
        "type": "bidirectional",
        "description": "GPIO PB6 (FT_f). Alt: LPTIM1_ETR, TIM4_CH1, I2C1_SCL, USART1_TX, CAN2_TX, TSC_G2_IO3, SAI1_FS_B, TIM16_CH1N, EVENTOUT."
      },
      {
        "number": "59",
        "name": "PB7",
        "type": "bidirectional",
        "description": "GPIO PB7 (FT_f). Alt: LPTIM1_IN2, TIM4_CH2, I2C1_SDA, USART1_RX, TSC_G2_IO4, TIM17_CH1N, EVENTOUT."
      },
      {
        "number": "60",
        "name": "PH3-BOOT0",
        "type": "bidirectional",
        "description": "GPIO PH3 muxed with BOOT0 boot-mode select input. Sampled at reset to choose the boot source (Main Flash, System memory bootloader, SRAM)."
      },
      {
        "number": "61",
        "name": "PB8",
        "type": "bidirectional",
        "description": "GPIO PB8 (FT_f). Alt: TIM4_CH3, TIM16_CH1, I2C1_SCL, CAN1_RX, SAI1_MCLK_A, SDMMC1_D4, EVENTOUT."
      },
      {
        "number": "62",
        "name": "PB9",
        "type": "bidirectional",
        "description": "GPIO PB9 (FT_f). Alt: TIM4_CH4, TIM17_CH1, I2C1_SDA, SPI2_NSS, CAN1_TX, IR_OUT, SAI1_FS_A, SDMMC1_D5, EVENTOUT."
      },
      {
        "number": "63",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "64",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply, 1.71 V to 3.6 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/stm32l431rct6tr.pdf",
        "pages": 208,
        "sha256": "71963de3cb899f8f",
        "source_tier": "mfr"
      },
      "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -5.675,
        -3.75
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "LQFP-64_10x10mm_P0.5mm@sha256:f5a3abeefd7fdfa3",
      "mark": "drawn"
    },
    "mcu": {
      "part_number": "STM32L431RCT6TR",
      "series": "STM32L4",
      "subfamily": "STM32L431",
      "core": "Arm Cortex-M4",
      "frequency_mhz": 80,
      "flash_kb": 256,
      "ram_kb": 64,
      "io_count": 52,
      "package": "LQFP 64 10x10x1.4 mm",
      "marketing_status": "Active",
      "fpu": "Single-precision FPU",
      "supply_v_min": 1.71,
      "supply_v_max": 3.6,
      "temp_min_c": -40,
      "temp_max_c": 85,
      "adc_count": 1,
      "timers": 5,
      "in_distributor_stock": false,
      "product_folder": "/en/microcontrollers-microprocessors/stm32l431rc.html",
      "source": "st.com portfolio grid CL1734"
    }
  },
  "metadata": {
    "specs": {
      "Core": "Arm Cortex-M4",
      "Max clock": "80 MHz",
      "Flash": "256 kB",
      "RAM": "64 kB",
      "I/O pins": 52,
      "ADC units": 1,
      "ST status": "Active",
      "Manufacturer": "STMicroelectronics",
      "Package": "LQFP-64(10x10)",
      "Category": "MCU",
      "Pins": "64"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "stm32l431rct6tr"
  ],
  "discovery_pitch": "STM32L431RCT6TR (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32l431rct6tr.kicad_sym",
    "stm32l431rct6tr.kicad_mod",
    "stm32l431rct6tr.glb",
    "stm32l431rct6tr.step",
    "stm32l431rct6tr.lbr",
    "docs/hero.png",
    "docs/stm32l431rct6tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "STM32L431RCT6TR",
      "kind": "packaging"
    },
    {
      "mpn": "STM32L431RCT6TRRCY6TR",
      "kind": "packaging"
    },
    {
      "mpn": "STM32L431RCT6TRVCT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32L431RCT6TRVCI6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32L431RCT6TRCCT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32L431RCT6TRCCU6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32L431RCT6TRCCY6TR",
      "kind": "packaging"
    },
    {
      "mpn": "STM32L431RCT6TRKCU6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32L431RCT6TRRCI6",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T08:54:55.056Z"
}