STM32L451CCU6TR

{
  "slug": "stm32l451ccu6tr",
  "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",
    "stm32l451ccu6tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32l451ccu6tr.kicad_sym",
    "stm32l451ccu6tr.kicad_mod",
    "stm32l451ccu6tr.glb",
    "stm32l451ccu6tr.step",
    "stm32l451ccu6tr.lbr",
    "docs/hero.png",
    "docs/stm32l451ccu6tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stm32l451ccu6tr-hero.glb",
    "stm32l451ccu6tr-hero.overlay.json"
  ],
  "component": {
    "mpn": "STM32L451CCU6TR",
    "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/8588886692124372992",
    "parts": {
      "symbol": "stm32l451ccu6tr.kicad_sym",
      "footprint": "stm32l451ccu6tr.kicad_mod",
      "model_3d": "stm32l451ccu6tr-hero.glb",
      "model_3d_plain": "stm32l451ccu6tr.glb",
      "model_3d_step": "stm32l451ccu6tr-etched.step",
      "model_3d_step_plain": "stm32l451ccu6tr.step",
      "lbr": "stm32l451ccu6tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C910590",
      "digikey": "497-19678-2-ND",
      "mouser": "511-STM32L451CCU6TR"
    },
    "distributor_check": {
      "checked_at": "2026-10-10T21:46:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-19678-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32L451CCU6TR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup-domain supply for the RTC and 32x32-bit backup registers, with a backup operating voltage of 1.55 V to 3.6 V."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO supplied through the power switch, limited to 3 mA sink, output speed no higher than 2 MHz at 30 pF, and not usable as a current source; also RTC_TAMP1, RTC_TS, RTC_OUT and WKUP2."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO with the same power-switch limits as PC13 (3 mA sink, 2 MHz at 30 pF, no current sourcing), and the 32 kHz LSE crystal input OSC32_IN."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO with the same power-switch limits as PC13 (3 mA sink, 2 MHz at 30 pF, no current sourcing), and the 32 kHz LSE crystal output OSC32_OUT."
      },
      {
        "number": "5",
        "name": "PH0-OSC_IN",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO that serves as the OSC_IN input of the 4 to 48 MHz crystal oscillator (HSE)."
      },
      {
        "number": "6",
        "name": "PH1-OSC_OUT",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO that serves as the OSC_OUT output of the 4 to 48 MHz crystal oscillator (HSE)."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with an embedded weak pull-up resistor."
      },
      {
        "number": "8",
        "name": "VSSA/VREF-",
        "type": "power_in",
        "description": "Analog ground; on this package the pin is shared with the VREF- negative reference input, which is internally connected to VSSA."
      },
      {
        "number": "9",
        "name": "VDDA/VREF+",
        "type": "power_in",
        "description": "Analog supply, with VDDA at 1.62 V to 3.6 V when the ADC or COMP is used, 1.8 V minimum for DAC or OPAMP, and 2.4 V minimum for VREFBUF; on this package it is shared with the VREF+ reference input."
      },
      {
        "number": "10",
        "name": "PA0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with an analog switch supplied by VDDA; also ADC1_IN5, COMP1_INM, OPAMP1_VINP, TIM2_CH1, USART2_CTS, UART4_TX and WKUP1."
      },
      {
        "number": "11",
        "name": "PA1",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with an analog switch supplied by VDDA; also ADC1_IN6, COMP1_INP, OPAMP1_VINM, TIM2_CH2, SPI1_SCK and USART2_RTS_DE."
      },
      {
        "number": "12",
        "name": "PA2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with an analog switch supplied by VDDA; also ADC1_IN7, COMP2_INM, WKUP4, LSCO, TIM2_CH3, USART2_TX, LPUART1_TX and QUADSPI_BK1_NCS."
      },
      {
        "number": "13",
        "name": "PA3",
        "type": "bidirectional",
        "description": "3.6 V-tolerant I/O with an analog switch supplied by VDDA; also ADC1_IN8, COMP2_INP, OPAMP1_VOUT, TIM2_CH4, USART2_RX, LPUART1_RX and QUADSPI_CLK."
      },
      {
        "number": "14",
        "name": "PA4",
        "type": "bidirectional",
        "description": "3.6 V-tolerant I/O with an analog switch supplied by VDDA; also ADC1_IN9, DAC1_OUT1, COMP1_INM, COMP2_INM, SPI1_NSS, SPI3_NSS, USART2_CK and SAI1_FS_B."
      },
      {
        "number": "15",
        "name": "PA5",
        "type": "bidirectional",
        "description": "3.6 V-tolerant I/O with an analog switch supplied by VDDA; also ADC1_IN10, COMP1_INM, COMP2_INM, TIM2_CH1, TIM2_ETR, SPI1_SCK, DFSDM1_CKOUT and LPTIM2_ETR."
      },
      {
        "number": "16",
        "name": "PA6",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with an analog switch supplied by VDDA; also ADC1_IN11, TIM1_BKIN, TIM3_CH1, SPI1_MISO, COMP1_OUT, USART3_CTS, LPUART1_CTS and QUADSPI_BK1_IO3."
      },
      {
        "number": "17",
        "name": "PA7",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O with an analog switch supplied by VDDA; also ADC1_IN12, TIM1_CH1N, TIM3_CH2, I2C3_SCL, SPI1_MOSI, DFSDM1_DATIN0 and QUADSPI_BK1_IO2."
      },
      {
        "number": "18",
        "name": "PB0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with an analog switch supplied by VDDA; also ADC1_IN15, TIM1_CH2N, TIM3_CH3, SPI1_NSS, USART3_CK, QUADSPI_BK1_IO1, COMP1_OUT and SAI1_EXTCLK."
      },
      {
        "number": "19",
        "name": "PB1",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with an analog switch supplied by VDDA; also ADC1_IN16, COMP1_INM, TIM1_CH3N, TIM3_CH4, USART3_RTS_DE, LPUART1_RTS_DE, QUADSPI_BK1_IO0 and LPTIM2_IN1."
      },
      {
        "number": "20",
        "name": "PB2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with an analog switch supplied by VDDA; also COMP1_INP, RTC_OUT, LPTIM1_OUT, I2C3_SMBA and DFSDM1_CKIN0."
      },
      {
        "number": "21",
        "name": "PB10",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O; also TIM2_CH3, I2C2_SCL, I2C4_SCL, SPI2_SCK, USART3_TX, LPUART1_RX, TSC_SYNC, QUADSPI_CLK, COMP1_OUT and SAI1_SCK_A."
      },
      {
        "number": "22",
        "name": "PB11",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O; also TIM2_CH4, I2C2_SDA, I2C4_SDA, USART3_RX, LPUART1_TX, QUADSPI_BK1_NCS and COMP2_OUT."
      },
      {
        "number": "23",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the external ground, with variation between ground pins limited to 50 mV."
      },
      {
        "number": "24",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply with a standard operating voltage of 1.71 V to 3.6 V; variation between VDD pins of the same domain is limited to 50 mV."
      },
      {
        "number": "25",
        "name": "PB12",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O; also TIM1_BKIN, I2C2_SMBA, SPI2_NSS, DFSDM1_DATIN1, USART3_CK, LPUART1_RTS_DE, TSC_G1_IO1, CAN1_RX, SAI1_FS_A and TIM15_BKIN."
      },
      {
        "number": "26",
        "name": "PB13",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O; also TIM1_CH1N, I2C2_SCL, SPI2_SCK, DFSDM1_CKIN1, USART3_CTS, LPUART1_CTS, TSC_G1_IO2, CAN1_TX, SAI1_SCK_A and TIM15_CH1N."
      },
      {
        "number": "27",
        "name": "PB14",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O; also TIM1_CH2N, I2C2_SDA, SPI2_MISO, DFSDM1_DATIN2, USART3_RTS_DE, TSC_G1_IO3, SAI1_MCLK_A and TIM15_CH1."
      },
      {
        "number": "28",
        "name": "PB15",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O; also RTC_REFIN, TIM1_CH3N, SPI2_MOSI, DFSDM1_CKIN2, TSC_G1_IO4, SAI1_SD_A and TIM15_CH2."
      },
      {
        "number": "29",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O; also MCO, TIM1_CH1, DFSDM1_CKIN1, USART1_CK, SAI1_SCK_A and LPTIM2_OUT."
      },
      {
        "number": "30",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O; also TIM1_CH2, I2C1_SCL, DFSDM1_DATIN1, USART1_TX, SAI1_FS_A and TIM15_BKIN."
      },
      {
        "number": "31",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O; also TIM1_CH3, I2C1_SDA, USART1_RX and SAI1_SD_A."
      },
      {
        "number": "32",
        "name": "PA11",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O; also TIM1_CH4, TIM1_BKIN2, SPI1_MISO, COMP1_OUT, USART1_CTS and CAN1_RX."
      },
      {
        "number": "33",
        "name": "PA12",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O; also TIM1_ETR, SPI1_MOSI, USART1_RTS_DE and CAN1_TX."
      },
      {
        "number": "34",
        "name": "PA13 (JTMS/SWDIO)",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O that is configured as the JTMS/SWDIO debug function after reset with its internal pull-up activated; also IR_OUT and SAI1_SD_B."
      },
      {
        "number": "35",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the external ground, with variation between ground pins limited to 50 mV."
      },
      {
        "number": "36",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply with a standard operating voltage of 1.71 V to 3.6 V; variation between VDD pins of the same domain is limited to 50 mV."
      },
      {
        "number": "37",
        "name": "PA14 (JTCK/SWCLK)",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O that is configured as the JTCK/SWCLK debug function after reset with its internal pull-down activated; also LPTIM1_OUT, I2C1_SMBA, I2C4_SMBA and SAI1_FS_B."
      },
      {
        "number": "38",
        "name": "PA15 (JTDI)",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O that is configured as the JTDI debug function after reset with its internal pull-up activated; also TIM2_CH1, TIM2_ETR, USART2_RX and SPI1_NSS."
      },
      {
        "number": "39",
        "name": "PB3 (JTDO/TRACESWO)",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with an analog switch supplied by VDDA; configured as the JTDO/TRACESWO debug function after reset, and also TIM2_CH2, SPI1_SCK, SPI3_SCK, USART1_RTS_DE and SAI1_SCK_B."
      },
      {
        "number": "40",
        "name": "PB4 (NJTRST)",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O with an analog switch supplied by VDDA; configured as NJTRST after reset with its internal pull-up activated, and also TIM3_CH1, I2C3_SDA, SPI1_MISO, SPI3_MISO, USART1_CTS and COMP2_INP."
      },
      {
        "number": "41",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O; also LPTIM1_IN1, TIM3_CH2, CAN1_RX, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI, USART1_CK, COMP2_OUT, SAI1_SD_B and TIM16_BKIN."
      },
      {
        "number": "42",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O with an analog switch supplied by VDDA; also LPTIM1_ETR, I2C1_SCL, I2C4_SCL, USART1_TX, CAN1_TX, TSC_G2_IO3, SAI1_FS_B, TIM16_CH1N and COMP2_INP."
      },
      {
        "number": "43",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O with an analog switch supplied by VDDA; also LPTIM1_IN2, I2C1_SDA, I2C4_SDA, USART1_RX, UART4_CTS, TSC_G2_IO4, COMP2_INM and PVD_IN."
      },
      {
        "number": "44",
        "name": "PH3-BOOT0",
        "type": "bidirectional",
        "description": "Pin with the BOOT0 function; Table 16 gives no I/O structure or tolerance for it, and it is also listed with EVENTOUT."
      },
      {
        "number": "45",
        "name": "PB8",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O; also I2C1_SCL, CAN1_RX, SDMMC1_D4, SAI1_MCLK_A and TIM16_CH1."
      },
      {
        "number": "46",
        "name": "PB9",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O; also IR_OUT, I2C1_SDA, SPI2_NSS, CAN1_TX, SDMMC1_D5 and SAI1_FS_A."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the external ground, with variation between ground pins limited to 50 mV."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply with a standard operating voltage of 1.71 V to 3.6 V; variation between VDD pins of the same domain is limited to 50 mV."
      },
      {
        "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-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The exposed die pad under the UFQFPN48 package (p.198-199) is not assigned a pin number in the pin d; Table 16 gives no I/O structure (shown as '-') for PH3-BOOT0; the I/O type is taken from the table's; Supply limits quoted in the descriptions (VBAT, VDDA by peripheral, VDD) come from Table 23 on p.91 ",
          "exposed pad 49 added from the footprint"
        ],
        "pages_sent": 77,
        "cost_usd": 0.3415,
        "at": "2026-10-10T21:45:51"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886692124372992",
        "pages": 207,
        "sha256": "aa4890e697f5f52e",
        "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"
    },
    "models_3d": [
      {
        "file": "stm32l451ccu6tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.0,
          7.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f2b38b0b4bf967c77e683e8d4599608b9f0503055ec535b93c4ebb5d0163e916",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stm32l451ccu6tr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.0,
          7.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "edcb83300acdb54883414c62f60e205e17f3b680ee8346e710c8ddc4e23c75cb",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}