STM8S103F3U3TR

{
  "schema_version": 1,
  "type": "component",
  "slug": "stm8s103f3u3tr",
  "title": "STM8S103F3U3TR",
  "brief": "STMicroelectronics Microcontroller Units (MCUs/MPUs/SOCs), UFQFPN-20(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "single chip microcomputer-microcontroller",
    "stm8s103f3u3tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "STM8S103F3U3TR",
    "manufacturer": "STMicroelectronics",
    "package": "UFQFPN-20(3x3)",
    "pin_count": 20,
    "category": "Single Chip Microcomputer/Microcontroller",
    "subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893454981582848",
    "parts": {
      "symbol": "stm8s103f3u3tr.kicad_sym",
      "footprint": "stm8s103f3u3tr.kicad_mod",
      "model_3d": "stm8s103f3u3tr-hero.glb",
      "model_3d_plain": "stm8s103f3u3tr.glb",
      "model_3d_step": "stm8s103f3u3tr-etched.step",
      "model_3d_step_plain": "stm8s103f3u3tr.step",
      "lbr": "stm8s103f3u3tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2052817",
      "digikey": "497-16046-2-ND",
      "mouser": "511-STM8S103F3U3TR"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T09:05:29Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-16046-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "511-STM8S103F3U3TR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Reset input with internal weak pull-up, active low."
      },
      {
        "number": "2",
        "name": "PA1/OSCIN",
        "type": "bidirectional",
        "description": "General-purpose I/O port A1, external oscillator crystal input."
      },
      {
        "number": "3",
        "name": "PA2/OSCOUT",
        "type": "bidirectional",
        "description": "General-purpose I/O port A2, external oscillator crystal output."
      },
      {
        "number": "4",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "5",
        "name": "VCAP",
        "type": "passive",
        "description": "1.8 V internal regulator output capacitor connection."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital power supply, 2.95 to 5.5 V."
      },
      {
        "number": "7",
        "name": "PA3/TIM2_CH3",
        "type": "bidirectional",
        "description": "High sink I/O port A3, Timer 2 channel 3 or configurable as SPI slave select via alternate function remapping."
      },
      {
        "number": "8",
        "name": "PB5/I2C_SDA",
        "type": "tri_state",
        "description": "True open-drain I/O port B5, I2C data or configurable as Timer 1 break input via alternate function remapping."
      },
      {
        "number": "9",
        "name": "PB4/I2C_SCL",
        "type": "tri_state",
        "description": "True open-drain I/O port B4, I2C clock or configurable as ADC external trigger via alternate function remapping."
      },
      {
        "number": "10",
        "name": "PC3/TIM1_CH3",
        "type": "bidirectional",
        "description": "High sink I/O port C3, Timer 1 channel 3 or configurable as top-level interrupt or inverted Timer 1 channel 1 via alternate function remapping."
      },
      {
        "number": "11",
        "name": "PC4/CLK_CCO/TIM1_CH4/AIN2",
        "type": "bidirectional",
        "description": "High sink I/O port C4, configurable as clock output, Timer 1 channel 4, analog input 2, or inverted Timer 1 channel 2 via alternate function remapping."
      },
      {
        "number": "12",
        "name": "PC5/SPI_SCK",
        "type": "bidirectional",
        "description": "High sink I/O port C5, SPI clock or configurable as Timer 2 channel 1 via alternate function remapping."
      },
      {
        "number": "13",
        "name": "PC6/SPI_MOSI",
        "type": "bidirectional",
        "description": "High sink I/O port C6, SPI master out/slave in or configurable as Timer 1 channel 1 via alternate function remapping."
      },
      {
        "number": "14",
        "name": "PC7/SPI_MISO",
        "type": "bidirectional",
        "description": "High sink I/O port C7, SPI master in/slave out or configurable as Timer 1 channel 2 via alternate function remapping."
      },
      {
        "number": "15",
        "name": "PD1/SWIM",
        "type": "bidirectional",
        "description": "High sink I/O port D1, SWIM single-wire interface for in-circuit debugging and programming."
      },
      {
        "number": "16",
        "name": "PD2/AIN3",
        "type": "bidirectional",
        "description": "High sink I/O port D2, analog input 3 or configurable as Timer 2 channel 3 via alternate function remapping."
      },
      {
        "number": "17",
        "name": "PD3/AIN4/TIM2_CH2/ADC_ETR",
        "type": "bidirectional",
        "description": "High sink I/O port D3, analog input 4, Timer 2 channel 2, or ADC external trigger."
      },
      {
        "number": "18",
        "name": "PD4/BEEP/TIM2_CH1/UART1_CK",
        "type": "bidirectional",
        "description": "High sink I/O port D4, configurable as beeper output, Timer 2 channel 1, or UART1 clock."
      },
      {
        "number": "19",
        "name": "PD5/AIN5/UART1_TX",
        "type": "bidirectional",
        "description": "High sink I/O port D5, UART1 transmit data or analog input 5."
      },
      {
        "number": "20",
        "name": "PD6/AIN6/UART1_RX",
        "type": "bidirectional",
        "description": "High sink I/O port D6, UART1 receive data or analog input 6."
      }
    ],
    "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": [],
        "pages_sent": 57,
        "cost_usd": 0.3651,
        "at": "2026-10-07T09:05:14"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893454981582848",
        "pages": 121,
        "sha256": "ac23789ac0a2f408",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "stm8s103f3u3tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3,
          3,
          0.6
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "a041605a19c65d5b64ab4e3e43119fd04980a1a759efc863cad57c0ec653b22b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stm8s103f3u3tr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "036f5df3155bfc107117ef7168168eb28fcc8154c3f60e38fe19a012c87c2f0c",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "UFQFPN-20(3x3)",
      "Category": "Single Chip Microcomputer/Microcontroller",
      "Pins": "20"
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "stm8s103f3u3tr"
  ],
  "discovery_pitch": "STM8S103F3U3TR (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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  "visibility": {
    "public": true
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}