STM32L051C8T3

{
  "slug": "stm32l051c8t3",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-48(7x7). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32l051c8t3",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
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    "stm32l051c8t3.kicad_mod",
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    "stm32l051c8t3.step",
    "stm32l051c8t3.lbr",
    "docs/hero.png",
    "docs/stm32l051c8t3-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stm32l051c8t3-hero.glb",
    "stm32l051c8t3-hero.overlay.json"
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  "component": {
    "mpn": "STM32L051C8T3",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-48(7x7)",
    "pin_count": 48,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886119459540992",
    "parts": {
      "symbol": "stm32l051c8t3.kicad_sym",
      "footprint": "stm32l051c8t3.kicad_mod",
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      "model_3d_step_plain": "stm32l051c8t3.step",
      "lbr": "stm32l051c8t3.lbr"
    },
    "distributor_links": {
      "lcsc": "C528751",
      "digikey": "497-15204-ND",
      "mouser": "511-STM32L051C8T3"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T01:13:36Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-15204-ND",
        "status": "found"
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      "mouser": {
        "pn": "511-STM32L051C8T3",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; the device power supply range is 1.65 V to 3.6 V."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) general-purpose I/O with additional functions RTC_TAMP1, RTC_TS, RTC_OUT and WKUP2."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O whose function after reset is PC14, with additional function OSC32_IN."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT (PC15)",
        "type": "bidirectional",
        "description": "Standard 3.3 V (TC) I/O whose function after reset is PC15, with additional function OSC32_OUT."
      },
      {
        "number": "5",
        "name": "PH0-OSC_IN",
        "type": "bidirectional",
        "description": "Standard 3.3 V (TC) I/O whose function after reset is PH0, with additional function OSC_IN."
      },
      {
        "number": "6",
        "name": "PH1-OSC_OUT (PH1)",
        "type": "bidirectional",
        "description": "Standard 3.3 V (TC) I/O whose function after reset is PH1, with additional function OSC_OUT."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with embedded weak pull-up resistor."
      },
      {
        "number": "8",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground pin."
      },
      {
        "number": "9",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply pin for the analog blocks of the device."
      },
      {
        "number": "10",
        "name": "PA0",
        "type": "bidirectional",
        "description": "Standard 3.3 V (TC) I/O with alternate functions TIM2_CH1, USART2_CTS, TIM2_ETR and COMP1_OUT, and additional functions COMP1_INM6, ADC_IN0 and RTC_TAMP2/WKUP1."
      },
      {
        "number": "11",
        "name": "PA1",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions EVENTOUT, TIM2_CH2, USART2_RTS/USART2_DE and TIM21_ETR, and additional functions COMP1_INP and ADC_IN1."
      },
      {
        "number": "12",
        "name": "PA2",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions TIM21_CH1, TIM2_CH3, USART2_TX and COMP2_OUT, and additional functions COMP2_INM6 and ADC_IN2."
      },
      {
        "number": "13",
        "name": "PA3",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions TIM21_CH2, TIM2_CH4 and USART2_RX, and additional functions COMP2_INP and ADC_IN3."
      },
      {
        "number": "14",
        "name": "PA4",
        "type": "bidirectional",
        "description": "Standard 3.3 V (TC) I/O with alternate functions SPI1_NSS, USART2_CK and TIM22_ETR, and additional functions COMP1_INM4, COMP2_INM4 and ADC_IN4."
      },
      {
        "number": "15",
        "name": "PA5",
        "type": "bidirectional",
        "description": "Standard 3.3 V (TC) I/O with alternate functions SPI1_SCK, TIM2_ETR and TIM2_CH1, and additional functions COMP1_INM5, COMP2_INM5 and ADC_IN5."
      },
      {
        "number": "16",
        "name": "PA6",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions SPI1_MISO, LPUART1_CTS, TIM22_CH1, EVENTOUT and COMP1_OUT, and additional function ADC_IN6."
      },
      {
        "number": "17",
        "name": "PA7",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions SPI1_MOSI, TIM22_CH2, EVENTOUT and COMP2_OUT, and additional function ADC_IN7."
      },
      {
        "number": "18",
        "name": "PB0",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate function EVENTOUT, and additional functions ADC_IN8 and VREF_OUT."
      },
      {
        "number": "19",
        "name": "PB1",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate function LPUART1_RTS/LPUART1_DE, and additional functions ADC_IN9 and VREF_OUT."
      },
      {
        "number": "20",
        "name": "PB2",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate function LPTIM1_OUT."
      },
      {
        "number": "21",
        "name": "PB10",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions TIM2_CH3, LPUART1_TX, SPI2_SCK and I2C2_SCL."
      },
      {
        "number": "22",
        "name": "PB11",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions EVENTOUT, TIM2_CH4, LPUART1_RX and I2C2_SDA."
      },
      {
        "number": "23",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "24",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; the device power supply range is 1.65 V to 3.6 V."
      },
      {
        "number": "25",
        "name": "PB12",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions SPI2_NSS/I2S2_WS, LPUART1_RTS/LPUART1_DE and EVENTOUT."
      },
      {
        "number": "26",
        "name": "PB13",
        "type": "bidirectional",
        "description": "5 V tolerant, FM+ capable (FTf) I/O with alternate functions SPI2_SCK/I2S2_CK, LPUART1_CTS, I2C2_SCL and TIM21_CH1."
      },
      {
        "number": "27",
        "name": "PB14",
        "type": "bidirectional",
        "description": "5 V tolerant, FM+ capable (FTf) I/O with alternate functions SPI2_MISO/I2S2_MCK, RTC_OUT, LPUART1_RTS/LPUART1_DE, I2C2_SDA and TIM21_CH2."
      },
      {
        "number": "28",
        "name": "PB15",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions SPI2_MOSI/I2S2_SD and RTC_REFIN."
      },
      {
        "number": "29",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions MCO, EVENTOUT and USART1_CK."
      },
      {
        "number": "30",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions MCO and USART1_TX."
      },
      {
        "number": "31",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate function USART1_RX."
      },
      {
        "number": "32",
        "name": "PA11",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O supplied by VDDIO2, with alternate functions SPI1_MISO, EVENTOUT, USART1_CTS and COMP1_OUT."
      },
      {
        "number": "33",
        "name": "PA12",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O supplied by VDDIO2, with alternate functions SPI1_MOSI, EVENTOUT, USART1_RTS/USART1_DE and COMP2_OUT."
      },
      {
        "number": "34",
        "name": "PA13",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate function SWDIO (serial wire debug data)."
      },
      {
        "number": "35",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "36",
        "name": "VDDIO2",
        "type": "power_in",
        "description": "Supply pin for I/Os PA11 and PA12 (greyed out in the pinout figure)."
      },
      {
        "number": "37",
        "name": "PA14",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions SWCLK (serial wire debug clock) and USART2_TX."
      },
      {
        "number": "38",
        "name": "PA15",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions SPI1_NSS, TIM2_ETR, EVENTOUT, USART2_RX and TIM2_CH1."
      },
      {
        "number": "39",
        "name": "PB3",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions SPI1_SCK, TIM2_CH2 and EVENTOUT, and additional function COMP2_INN."
      },
      {
        "number": "40",
        "name": "PB4",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions SPI1_MISO, EVENTOUT and TIM22_CH1, and additional function COMP2_INP."
      },
      {
        "number": "41",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V tolerant (FT) I/O with alternate functions SPI1_MOSI, LPTIM1_IN1, I2C1_SMBA and TIM22_CH2, and additional function COMP2_INP."
      },
      {
        "number": "42",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V tolerant, FM+ capable (FTf) I/O with alternate functions USART1_TX, I2C1_SCL and LPTIM1_ETR, and additional function COMP2_INP."
      },
      {
        "number": "43",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V tolerant, FM+ capable (FTf) I/O with alternate functions USART1_RX, I2C1_SDA and LPTIM1_IN2, and additional functions COMP2_INP and PVD_IN."
      },
      {
        "number": "44",
        "name": "BOOT0",
        "type": "input",
        "description": "Dedicated BOOT0 pin used to select the boot mode."
      },
      {
        "number": "45",
        "name": "PB8",
        "type": "bidirectional",
        "description": "5 V tolerant, FM+ capable (FTf) I/O with alternate function I2C1_SCL."
      },
      {
        "number": "46",
        "name": "PB9",
        "type": "bidirectional",
        "description": "5 V tolerant, FM+ capable (FTf) I/O with alternate functions EVENTOUT, I2C1_SDA and SPI2_NSS/I2S2_WS."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin; the device power supply range is 1.65 V to 3.6 V."
      }
    ],
    "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: Package selection: MPN STM32L051C8T3 decodes to 48-pin (C), 64 KB flash (8), LQFP (T). Pinout taken ; Conflicting I/O structure for PC15 (pin 4): Table 15 prints TC, but the revision history (Rev 5) sta; Pins 36 (VDDIO2) supply PA11 and PA12 (pins 32, 33), which are shown greyed out in the pinout figure"
        ],
        "pages_sent": 59,
        "cost_usd": 0.2635,
        "at": "2026-10-08T01:13:07"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886119459540992",
        "pages": 133,
        "sha256": "232fdca5c41218a1",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 48,
        "described": 48,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "9dea352d93177c2904afd7d7b68ea8855ce1ab691f69f8b3e13655600514b6bf",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "07fe4ae05879c4e52ecd8d2e03bb1168755c5f33996a56ca75d929286b7c3f54",
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}