STM32F401CBU3

{
  "schema_version": 1,
  "type": "component",
  "slug": "stm32f401cbu3",
  "title": "STM32F401CBU3",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-48(7x7). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32f401cbu3",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "STM32F401CBU3",
    "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/8588922587724861440",
    "parts": {
      "symbol": "stm32f401cbu3.kicad_sym",
      "footprint": "stm32f401cbu3.kicad_mod",
      "model_3d": "stm32f401cbu3-hero.glb",
      "model_3d_plain": "stm32f401cbu3.glb",
      "model_3d_step": "stm32f401cbu3-etched.step",
      "model_3d_step_plain": "stm32f401cbu3.step",
      "lbr": "stm32f401cbu3.lbr"
    },
    "distributor_links": {
      "lcsc": "C1342384",
      "digikey": "STM32F401CBU3-ND",
      "mouser": "511-STM32F401CBU3"
    },
    "distributor_check": {
      "checked_at": "2026-10-06T00:22:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "STM32F401CBU3-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32F401CBU3",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Battery supply voltage input, 1.7 V to 3.6 V, for RTC and backup domain."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "GPIO with RTC tamper input, RTC event output, and eventout capability."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "GPIO with 32.768 kHz oscillator input function, internally connected oscillator input."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "GPIO with 32.768 kHz oscillator output function, internally connected oscillator output."
      },
      {
        "number": "5",
        "name": "PH0-OSC_IN",
        "type": "bidirectional",
        "description": "GPIO with 4-26 MHz main oscillator input function."
      },
      {
        "number": "6",
        "name": "PH1-OSC_OUT",
        "type": "bidirectional",
        "description": "GPIO with 4-26 MHz main oscillator output function."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Reset input with internal weak pull-up resistor and Schmitt trigger for hardware reset generation."
      },
      {
        "number": "8",
        "name": "VSSA/VREF-",
        "type": "power_in",
        "description": "Analog ground reference, must be connected to VSS, serves as ADC reference negative input."
      },
      {
        "number": "9",
        "name": "VDDA/VREF+",
        "type": "power_out",
        "description": "Analog supply voltage 1.8 V to 3.6 V and ADC reference positive, requires 100 nF to 1 µF decoupling capacitor to VSSA."
      },
      {
        "number": "10",
        "name": "PA0",
        "type": "bidirectional",
        "description": "GPIO with ADC input channel 0, wake-up capability, and timer input/output function."
      },
      {
        "number": "11",
        "name": "PA1",
        "type": "bidirectional",
        "description": "GPIO with ADC input channel 1 and timer input/output capability."
      },
      {
        "number": "12",
        "name": "PA2",
        "type": "bidirectional",
        "description": "GPIO with ADC input channel 2, USART2 transmit, and timer input/output capability."
      },
      {
        "number": "13",
        "name": "PA3",
        "type": "bidirectional",
        "description": "GPIO with ADC input channel 3, USART2 receive, and timer input/output capability."
      },
      {
        "number": "14",
        "name": "PA4",
        "type": "bidirectional",
        "description": "GPIO with ADC input channel 4, SPI1/SPI3 chip select, and timer capability."
      },
      {
        "number": "15",
        "name": "PA5",
        "type": "bidirectional",
        "description": "GPIO with ADC input channel 5, SPI1 clock, and timer input/output capability."
      },
      {
        "number": "16",
        "name": "PA6",
        "type": "bidirectional",
        "description": "GPIO with ADC input channel 6, SPI1 MISO, TIM1 break-in, and timer input/output capability."
      },
      {
        "number": "17",
        "name": "PA7",
        "type": "bidirectional",
        "description": "GPIO with ADC input channel 7, SPI1 MOSI, TIM1 complementary output, and timer capability."
      },
      {
        "number": "18",
        "name": "PB0",
        "type": "bidirectional",
        "description": "GPIO with ADC input channel 8, TIM1 complementary output, and timer input/output capability."
      },
      {
        "number": "19",
        "name": "PB1",
        "type": "bidirectional",
        "description": "GPIO with ADC input channel 9, TIM1 complementary output, and timer input/output capability."
      },
      {
        "number": "20",
        "name": "PB2",
        "type": "bidirectional",
        "description": "GPIO with boot mode select functionality and eventout capability, labeled BOOT1 option."
      },
      {
        "number": "21",
        "name": "PB10",
        "type": "bidirectional",
        "description": "GPIO with I2C2 clock, SPI2 clock, and timer input/output capability."
      },
      {
        "number": "22",
        "name": "VCAP_1",
        "type": "passive",
        "description": "Decoupling capacitor connection for internal voltage regulator, 100 nF to 1 µF capacitor required between VCAP_1 and VCAP_2."
      },
      {
        "number": "23",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference voltage, must be connected to power supply ground plane."
      },
      {
        "number": "24",
        "name": "VDD",
        "type": "power_out",
        "description": "Digital supply voltage, 1.7 V to 3.6 V operating range."
      },
      {
        "number": "25",
        "name": "PB12",
        "type": "bidirectional",
        "description": "GPIO with SPI2 chip select, I2C2 SMBus alert, TIM1 break-in, and timer capability."
      },
      {
        "number": "26",
        "name": "PB13",
        "type": "bidirectional",
        "description": "GPIO with SPI2 clock, TIM1 complementary output, and timer input/output capability."
      },
      {
        "number": "27",
        "name": "PB14",
        "type": "bidirectional",
        "description": "GPIO with SPI2 MISO, TIM1 complementary output, and timer input/output capability."
      },
      {
        "number": "28",
        "name": "PB15",
        "type": "bidirectional",
        "description": "GPIO with SPI2 MOSI, RTC reference input, TIM1 complementary output, and timer capability."
      },
      {
        "number": "29",
        "name": "PA8",
        "type": "bidirectional",
        "description": "GPIO with I2C3 clock, USART1 clock, TIM1 output, USB SOF output, and MCO1 capability."
      },
      {
        "number": "30",
        "name": "PA9",
        "type": "bidirectional",
        "description": "GPIO with I2C3 SMBus alert, USART1 transmit, TIM1 output, and USB VBUS input capability."
      },
      {
        "number": "31",
        "name": "PA10",
        "type": "bidirectional",
        "description": "GPIO with USART1 receive, TIM1 output, USB ID input, and timer capability."
      },
      {
        "number": "32",
        "name": "PA11",
        "type": "bidirectional",
        "description": "GPIO with USART1 CTS, TIM1 output, and USB DM signal line capability."
      },
      {
        "number": "33",
        "name": "PA12",
        "type": "bidirectional",
        "description": "GPIO with USART1 RTS, TIM1 external trigger, and USB DP signal line capability."
      },
      {
        "number": "34",
        "name": "PA13",
        "type": "bidirectional",
        "description": "GPIO/JTAG TMS pin shared with SWD data I/O (SWDIO) for debug interface."
      },
      {
        "number": "35",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference voltage, must be connected to power supply ground plane."
      },
      {
        "number": "36",
        "name": "VDD",
        "type": "power_out",
        "description": "Digital supply voltage, 1.7 V to 3.6 V operating range."
      },
      {
        "number": "37",
        "name": "PA14",
        "type": "bidirectional",
        "description": "GPIO/JTAG TCK pin shared with SWD clock (SWCLK) for debug interface."
      },
      {
        "number": "38",
        "name": "PA15",
        "type": "bidirectional",
        "description": "GPIO/JTAG TDI pin with SPI1 chip select, SPI3 chip select, and timer input/output capability."
      },
      {
        "number": "39",
        "name": "PB3",
        "type": "bidirectional",
        "description": "GPIO/JTAG TDO pin shared with SWO trace output and SPI1 clock capability."
      },
      {
        "number": "40",
        "name": "PB4",
        "type": "bidirectional",
        "description": "GPIO/JTAG TRST pin with SPI1 MISO, I2C3 SDA, and timer input/output capability."
      },
      {
        "number": "41",
        "name": "PB5",
        "type": "bidirectional",
        "description": "GPIO with SPI1 MOSI, I2C1 SMBus alert, SPI3 MOSI, and timer input/output capability."
      },
      {
        "number": "42",
        "name": "PB6",
        "type": "bidirectional",
        "description": "GPIO with I2C1 clock, USART1 transmit, and timer input/output capability."
      },
      {
        "number": "43",
        "name": "PB7",
        "type": "bidirectional",
        "description": "GPIO with I2C1 data, USART1 receive, and timer input/output capability."
      },
      {
        "number": "44",
        "name": "BOOT0",
        "type": "input",
        "description": "Boot configuration pin sampled at reset, selects boot from flash or system memory, VPP during flash programming."
      },
      {
        "number": "45",
        "name": "PB8",
        "type": "bidirectional",
        "description": "GPIO with I2C1 clock, TIM4 output, TIM10 input/output, and SDIO data capability."
      },
      {
        "number": "46",
        "name": "PB9",
        "type": "bidirectional",
        "description": "GPIO with I2C1 data, SPI2 chip select, TIM4 output, TIM11 input/output, and SDIO data capability."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference voltage, must be connected to power supply ground plane."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_out",
        "description": "Digital supply voltage, 1.7 V to 3.6 V operating range."
      },
      {
        "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: VCAP_1 and VCAP_2 pins (22, 33 noted in Table 8 but pin 33 is VCAP_2 on LQFP100 only): These capacit; Oscillator pins (PC14-OSC32_IN, PC15-OSC32_OUT, PH0-OSC_IN, PH1-OSC_OUT): These GPIO pins have speci; Multiple VSS and VDD supply pins (pins 23, 24, 35, 36, 47, 48): All digital ground and power pins mu",
          "exposed pad 49 added from the footprint"
        ],
        "pages_sent": 56,
        "cost_usd": 0.4612,
        "at": "2026-10-06T00:21:55"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588922587724861440",
        "pages": 139,
        "sha256": "c38f92aa9d66e8cb",
        "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"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "UFQFPN-48(7x7)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "49"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "stm32f401cbu3"
  ],
  "discovery_pitch": "STM32F401CBU3 (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32f401cbu3.kicad_sym",
    "stm32f401cbu3.kicad_mod",
    "stm32f401cbu3.glb",
    "stm32f401cbu3.step",
    "stm32f401cbu3.lbr",
    "docs/hero.png",
    "docs/stm32f401cbu3-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stm32f401cbu3-hero.glb",
    "stm32f401cbu3-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}