STM32F103TBU7

{
  "schema_version": 1,
  "type": "component",
  "slug": "stm32f103tbu7",
  "title": "STM32F103TBU7",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), UQFN-36-EP(6x6). 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",
    "stm32f103tbu7",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "STM32F103TBU7",
    "manufacturer": "STMicroelectronics",
    "package": "UQFN-36-EP(6x6)",
    "pin_count": 37,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893528851664896",
    "parts": {
      "symbol": "stm32f103tbu7.kicad_sym",
      "footprint": "stm32f103tbu7.kicad_mod",
      "model_3d": "stm32f103tbu7-hero.glb",
      "model_3d_plain": "stm32f103tbu7.glb",
      "model_3d_step": "stm32f103tbu7-etched.step",
      "model_3d_step_plain": "stm32f103tbu7.step",
      "lbr": "stm32f103tbu7.lbr"
    },
    "distributor_links": {
      "lcsc": "C1339326",
      "digikey": "497-18523-ND",
      "mouser": "511-STM32F103TBU7"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T00:48:43Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-18523-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "511-STM32F103TBU7",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD_3",
        "type": "power_in",
        "description": "Digital supply pin for the I/O ring and core; the application supply and I/Os operate from 2.0 to 3.6 V."
      },
      {
        "number": "2",
        "name": "OSC_IN",
        "type": "input",
        "description": "High-speed external oscillator input (4-16 MHz crystal) that is the default function after reset; PD0 can be selected by software remap, and in output mode PD0 is limited to 50 MHz."
      },
      {
        "number": "3",
        "name": "OSC_OUT",
        "type": "output",
        "description": "High-speed external oscillator output (4-16 MHz crystal) that is the default function after reset; PD1 can be selected by software remap, and in output mode PD1 is limited to 50 MHz."
      },
      {
        "number": "4",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Reset pin; its electrical characteristics are specified in the NRST pin characteristics section (5.3.14)."
      },
      {
        "number": "5",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground reference for the ADC and analog circuitry; all voltages are referenced to VSS."
      },
      {
        "number": "6",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply for the ADC and temperature sensor; the temperature sensor conversion range is 2 V < VDDA < 3.6 V."
      },
      {
        "number": "7",
        "name": "PA0-WKUP",
        "type": "bidirectional",
        "description": "GPIO PA0 (not marked 5 V tolerant) with WKUP wake-up, USART2_CTS, ADC12_IN0 and TIM2_CH1_ETR alternate functions."
      },
      {
        "number": "8",
        "name": "PA1",
        "type": "bidirectional",
        "description": "GPIO PA1 (not marked 5 V tolerant) with USART2_RTS, ADC12_IN1 and TIM2_CH2 alternate functions."
      },
      {
        "number": "9",
        "name": "PA2",
        "type": "bidirectional",
        "description": "GPIO PA2 (not marked 5 V tolerant) with USART2_TX, ADC12_IN2 and TIM2_CH3 alternate functions."
      },
      {
        "number": "10",
        "name": "PA3",
        "type": "bidirectional",
        "description": "GPIO PA3 (not marked 5 V tolerant) with USART2_RX, ADC12_IN3 and TIM2_CH4 alternate functions."
      },
      {
        "number": "11",
        "name": "PA4",
        "type": "bidirectional",
        "description": "GPIO PA4 (not marked 5 V tolerant) with SPI1_NSS, USART2_CK and ADC12_IN4 alternate functions."
      },
      {
        "number": "12",
        "name": "PA5",
        "type": "bidirectional",
        "description": "GPIO PA5 (not marked 5 V tolerant) with SPI1_SCK and ADC12_IN5 alternate functions."
      },
      {
        "number": "13",
        "name": "PA6",
        "type": "bidirectional",
        "description": "GPIO PA6 (not marked 5 V tolerant) with SPI1_MISO, ADC12_IN6, TIM3_CH1 and remapped TIM1_BKIN alternate functions."
      },
      {
        "number": "14",
        "name": "PA7",
        "type": "bidirectional",
        "description": "GPIO PA7 (not marked 5 V tolerant) with SPI1_MOSI, ADC12_IN7, TIM3_CH2 and remapped TIM1_CH1N alternate functions."
      },
      {
        "number": "15",
        "name": "PB0",
        "type": "bidirectional",
        "description": "GPIO PB0 (not marked 5 V tolerant) with ADC12_IN8, TIM3_CH3 and remapped TIM1_CH2N alternate functions."
      },
      {
        "number": "16",
        "name": "PB1",
        "type": "bidirectional",
        "description": "GPIO PB1 (not marked 5 V tolerant) with ADC12_IN9, TIM3_CH4 and remapped TIM1_CH3N alternate functions."
      },
      {
        "number": "17",
        "name": "PB2/BOOT1",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PB2 that also serves as the BOOT1 boot-mode configuration pin."
      },
      {
        "number": "18",
        "name": "VSS_1",
        "type": "power_in",
        "description": "Digital ground pin for the I/O ring and core."
      },
      {
        "number": "19",
        "name": "VDD_1",
        "type": "power_in",
        "description": "Digital supply pin for the I/O ring and core; the application supply and I/Os operate from 2.0 to 3.6 V."
      },
      {
        "number": "20",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PA8 with USART1_CK, TIM1_CH1 and MCO alternate functions."
      },
      {
        "number": "21",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PA9 with USART1_TX and TIM1_CH2 alternate functions."
      },
      {
        "number": "22",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PA10 with USART1_RX and TIM1_CH3 alternate functions."
      },
      {
        "number": "23",
        "name": "PA11",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PA11 with USART1_CTS, CANRX, USBDM and TIM1_CH4 alternate functions."
      },
      {
        "number": "24",
        "name": "PA12",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PA12 with USART1_RTS, CANTX, USBDP and TIM1_ETR alternate functions."
      },
      {
        "number": "25",
        "name": "PA13",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PA13; its default function is JTMS/SWDIO (serial wire debug data)."
      },
      {
        "number": "26",
        "name": "VSS_2",
        "type": "power_in",
        "description": "Digital ground pin for the I/O ring and core."
      },
      {
        "number": "27",
        "name": "VDD_2",
        "type": "power_in",
        "description": "Digital supply pin for the I/O ring and core; the application supply and I/Os operate from 2.0 to 3.6 V."
      },
      {
        "number": "28",
        "name": "PA14",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PA14; its default function is JTCK/SWCLK (serial wire debug clock)."
      },
      {
        "number": "29",
        "name": "PA15",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PA15; its default function is JTDI, with TIM2_CH1_ETR and SPI1_NSS alternate functions."
      },
      {
        "number": "30",
        "name": "PB3",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PB3; its default function is JTDO, with TIM2_CH2, TRACESWO and remapped SPI1_SCK alternate functions."
      },
      {
        "number": "31",
        "name": "PB4",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PB4; its default function is JNTRST, with TIM3_CH1 and remapped SPI1_MISO alternate functions."
      },
      {
        "number": "32",
        "name": "PB5",
        "type": "bidirectional",
        "description": "GPIO PB5 (not marked 5 V tolerant) with I2C1_SMBAL, TIM3_CH2 and remapped SPI1_MOSI alternate functions."
      },
      {
        "number": "33",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PB6 with I2C1_SCL, TIM4_CH1 and USART1_TX alternate functions."
      },
      {
        "number": "34",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO PB7 with I2C1_SDA, TIM4_CH2 and USART1_RX alternate functions."
      },
      {
        "number": "35",
        "name": "BOOT0",
        "type": "input",
        "description": "Boot mode selection input (BOOT0); the boot mode behaviour is described in the Boot modes section of the datasheet."
      },
      {
        "number": "36",
        "name": "VSS_3",
        "type": "power_in",
        "description": "Digital ground pin for the I/O ring and core."
      },
      {
        "number": "37",
        "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: Package naming mismatch: the hint says UQFN-36-EP(6x6), but the datasheet names this 36-pin 6x6 mm, ; No exposed-pad (EP) pin is listed: the datasheet text for VFQFPN36 does not give an exposed pad pin ; Pins 2 and 3 are OSC_IN/OSC_OUT by default after reset; PD0/PD1 are software-remap alternatives (foo",
          "exposed pad 37 added from the footprint"
        ],
        "pages_sent": 66,
        "cost_usd": 0.2788,
        "at": "2026-10-08T00:48:25"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893528851664896",
        "pages": 117,
        "sha256": "4741c03c5793745c",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 37,
        "described": 37,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "stm32f103tbu7.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          6,
          0.77
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "6212c4fd2463ccb7c6ae2c35f5e24c80884153fcaeaf8e86549c0e49087bc8bb",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stm32f103tbu7-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          6,
          0.77
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c7c4220845bc41bc34838b3899544e57c7e0da01b9bc7d9b32343275d383cdf5",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "UQFN-36-EP(6x6)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "37"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "stm32f103tbu7"
  ],
  "discovery_pitch": "STM32F103TBU7 (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",
    "stm32f103tbu7.kicad_sym",
    "stm32f103tbu7.kicad_mod",
    "stm32f103tbu7.glb",
    "stm32f103tbu7.step",
    "stm32f103tbu7.lbr",
    "docs/hero.png",
    "docs/stm32f103tbu7-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stm32f103tbu7-hero.glb",
    "stm32f103tbu7-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}