AT89C4051-12SU

{
  "slug": "at89c4051-12su",
  "version": "0.1.1",
  "type": "component",
  "description": "Microchip Tech Pre-ordered MCUs, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "at89c4051-12su",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "at89c4051-12su.kicad_sym",
    "at89c4051-12su.kicad_mod",
    "at89c4051-12su.glb",
    "at89c4051-12su.step",
    "at89c4051-12su.lbr",
    "docs/hero.png",
    "docs/at89c4051-12su-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "at89c4051-12su-hero.glb",
    "at89c4051-12su-hero.overlay.json",
    "at89c4051-12su-etched.glb"
  ],
  "component": {
    "mpn": "AT89C4051-12SU",
    "manufacturer": "Microchip Tech",
    "package": "SOIC-20-300mil",
    "pin_count": 20,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Pre-ordered MCUs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/32518bbd29f048caa64e52b063a36c82.pdf",
    "parts": {
      "symbol": "at89c4051-12su.kicad_sym",
      "footprint": "at89c4051-12su.kicad_mod",
      "model_3d": "at89c4051-12su-hero.glb",
      "model_3d_plain": "at89c4051-12su-etched.glb",
      "model_3d_step": "at89c4051-12su-etched.step",
      "model_3d_step_plain": "at89c4051-12su.step",
      "lbr": "at89c4051-12su.lbr"
    },
    "distributor_links": {
      "lcsc": "C1340460",
      "digikey": "AT89C4051-12SU-ND",
      "mouser": "556-A89C405112SU"
    },
    "distributor_check": {
      "checked_at": "2026-11-11T02:20:05Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "AT89C4051-12SU-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "556-A89C405112SU",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RST/VPP",
        "type": "input",
        "description": "Reset input: holding RST high for two machine cycles while the oscillator is running resets the device, and RST is raised to 12V to enable Flash programming."
      },
      {
        "number": "2",
        "name": "P3.0",
        "type": "bidirectional",
        "description": "Bi-directional I/O pin with internal pullup; alternate function is RXD, the serial input port."
      },
      {
        "number": "3",
        "name": "P3.1",
        "type": "bidirectional",
        "description": "Bi-directional I/O pin with internal pullup; alternate function is TXD, the serial output port, and it serves as RDY/BSY output during programming."
      },
      {
        "number": "4",
        "name": "XTAL2",
        "type": "output",
        "description": "Output from the inverting oscillator amplifier; left unconnected when the device is driven from an external clock."
      },
      {
        "number": "5",
        "name": "XTAL1",
        "type": "input",
        "description": "Input to the inverting oscillator amplifier and to the internal clock operating circuit."
      },
      {
        "number": "6",
        "name": "P3.2",
        "type": "bidirectional",
        "description": "Bi-directional I/O pin with internal pullup; alternate function is INT0, external interrupt 0."
      },
      {
        "number": "7",
        "name": "P3.3",
        "type": "bidirectional",
        "description": "Bi-directional I/O pin with internal pullup; alternate function is INT1, external interrupt 1."
      },
      {
        "number": "8",
        "name": "P3.4",
        "type": "bidirectional",
        "description": "Bi-directional I/O pin with internal pullup; alternate function is T0, the timer 0 external input."
      },
      {
        "number": "9",
        "name": "P3.5",
        "type": "bidirectional",
        "description": "Bi-directional I/O pin with internal pullup; alternate function is T1, the timer 1 external input."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "11",
        "name": "P3.7",
        "type": "bidirectional",
        "description": "Bi-directional I/O pin with internal pullup; it also receives control signals for Flash programming and verification."
      },
      {
        "number": "12",
        "name": "P1.0 (AIN0)",
        "type": "bidirectional",
        "description": "Port 1 bi-directional I/O pin without internal pullup, requiring an external pullup; it is the positive input (AIN0) of the on-chip analog comparator."
      },
      {
        "number": "13",
        "name": "P1.1 (AIN1)",
        "type": "bidirectional",
        "description": "Port 1 bi-directional I/O pin without internal pullup, requiring an external pullup; it is the negative input (AIN1) of the on-chip analog comparator."
      },
      {
        "number": "14",
        "name": "P1.2",
        "type": "bidirectional",
        "description": "Port 1 bi-directional I/O pin with internal pullup; Port 1 output buffers can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "15",
        "name": "P1.3",
        "type": "bidirectional",
        "description": "Port 1 bi-directional I/O pin with internal pullup; Port 1 output buffers can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "16",
        "name": "P1.4",
        "type": "bidirectional",
        "description": "Port 1 bi-directional I/O pin with internal pullup; Port 1 output buffers can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "17",
        "name": "P1.5",
        "type": "bidirectional",
        "description": "Port 1 bi-directional I/O pin with internal pullup; Port 1 output buffers can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "18",
        "name": "P1.6",
        "type": "bidirectional",
        "description": "Port 1 bi-directional I/O pin with internal pullup; Port 1 output buffers can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "19",
        "name": "P1.7",
        "type": "bidirectional",
        "description": "Port 1 bi-directional I/O pin with internal pullup; Port 1 output buffers can sink 20 mA and drive LED displays directly."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, specified from 2.7V to 6.0V for operation."
      }
    ],
    "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: Pin numbers were assigned from the PDIP/SOIC pin-configuration figure on page 2, whose text extracti; P3.6 is not a pin on this package. The datasheet states it is internally wired to the comparator out; Port 1 pins P1.0 and P1.1 need external pullups when used as outputs. The datasheet's idle and power"
        ],
        "pages_sent": 19,
        "cost_usd": 0.0808,
        "at": "2026-11-11T02:19:45"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/32518bbd29f048caa64e52b063a36c82.pdf",
        "pages": 19,
        "sha256": "7dd0a76556785ab0",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
    },
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        "units": "mm",
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        "seat": "z = 0",
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
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        "checked": "2026-11-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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        "sha256": "0f0d93ff53151324e4d9728bb2dbd187fa813aab9a5d903a7ab59ce7dc6ef5a0",
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      }
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  }
}