MCP2120-I

{
  "slug": "mcp2120-i",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Interface - Specialized, PDIP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "communication interface chip-uart-485-232",
    "mcp2120-i",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mcp2120-i.kicad_sym",
    "mcp2120-i.kicad_mod",
    "mcp2120-i.glb",
    "mcp2120-i.step",
    "mcp2120-i.lbr",
    "docs/hero.png",
    "docs/mcp2120-i-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mcp2120-i-hero.glb",
    "mcp2120-i-hero.overlay.json",
    "mcp2120-i-etched.glb"
  ],
  "component": {
    "mpn": "MCP2120-I",
    "manufacturer": "Microchip Tech",
    "package": "PDIP-14",
    "pin_count": 14,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Interface - Specialized",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/931bc741a7b04d6991a1dd1fdd398f18.pdf",
    "parts": {
      "symbol": "mcp2120-i.kicad_sym",
      "footprint": "mcp2120-i.kicad_mod",
      "model_3d": "mcp2120-i-hero.glb",
      "model_3d_plain": "mcp2120-i-etched.glb",
      "model_3d_step": "mcp2120-i-etched.step",
      "model_3d_step_plain": "mcp2120-i.step",
      "lbr": "mcp2120-i.lbr"
    },
    "distributor_links": {
      "lcsc": "C636789"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T11:59:14Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply for logic and I/O pins."
      },
      {
        "number": "2",
        "name": "OSC1/CLKIN",
        "type": "input",
        "description": "Oscillator crystal input / external clock source input (CMOS compatible); external clock up to 20 MHz, DC minimum."
      },
      {
        "number": "3",
        "name": "OSC2",
        "type": "output",
        "description": "Oscillator crystal output."
      },
      {
        "number": "4",
        "name": "RESET",
        "type": "input",
        "description": "Resets the device when held low (Schmitt Trigger input); minimum low pulse width 2000 ns at VDD = 5.0 V."
      },
      {
        "number": "5",
        "name": "RXIR",
        "type": "input",
        "description": "Asynchronous receive input from the infrared transceiver (Schmitt Trigger input)."
      },
      {
        "number": "6",
        "name": "TXIR",
        "type": "output",
        "description": "Asynchronous transmit output to the infrared transceiver."
      },
      {
        "number": "7",
        "name": "MODE",
        "type": "input",
        "description": "Selects the device mode (Data/Command) for Software Baud Rate operation (TTL compatible input)."
      },
      {
        "number": "8",
        "name": "BAUD2",
        "type": "input",
        "description": "BAUD2:BAUD0 specify the baud rate of the device or whether it operates in Software Baud Rate mode (TTL compatible input)."
      },
      {
        "number": "9",
        "name": "BAUD1",
        "type": "input",
        "description": "BAUD2:BAUD0 specify the baud rate of the device or whether it operates in Software Baud Rate mode (TTL compatible input)."
      },
      {
        "number": "10",
        "name": "BAUD0",
        "type": "input",
        "description": "BAUD2:BAUD0 specify the baud rate of the device or whether it operates in Software Baud Rate mode (TTL compatible input)."
      },
      {
        "number": "11",
        "name": "RX",
        "type": "output",
        "description": "Asynchronous transmit output to the controller UART."
      },
      {
        "number": "12",
        "name": "TX",
        "type": "input",
        "description": "Asynchronous receive input from the controller UART (TTL compatible input)."
      },
      {
        "number": "13",
        "name": "EN",
        "type": "input",
        "description": "Device enable input."
      },
      {
        "number": "14",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference for logic and I/O pins."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet lists the MCP2120 pin table for PDIP and SOIC with identical numbering; no ambiguity i; EN has no buffer type listed in the datasheet; classified as input based on the 'I' pin type.",
          "1/14 pin names appear NOWHERE in the datasheet text: ['3:OSC2@p4']"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0787,
        "at": "2026-10-30T11:58:56"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/931bc741a7b04d6991a1dd1fdd398f18.pdf",
        "pages": 36,
        "sha256": "084e618aaa15a6a8",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mcp2120-i.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.05,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3dae072a95c64bee0d1e58be8e75383639f5017ab982de1749d05808a4eed058",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mcp2120-i-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.05,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b3e96b95d62bde13d7f26e537adf13fe2091289c3309d84f34547852a94ad7e1",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "P (PDIP-14, 300 mil)",
      "source_page": 28,
      "D": {
        "nom_mm": 19.05,
        "range_mm": [
          18.669,
          19.685
        ]
      },
      "E1": {
        "nom_mm": 6.35,
        "range_mm": [
          6.096,
          7.112
        ]
      },
      "E": {
        "nom_mm": 7.874,
        "range_mm": [
          7.366,
          8.255
        ]
      },
      "e": {
        "nom_mm": 2.54,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 5.334,
        "range_mm": [
          null,
          5.334
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "mcp2120-i.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}