74AHC139D

{
  "slug": "74ahc139d",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Signal Switches, Multiplexers, Decoders, SO-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74ahc139d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74ahc139d.kicad_sym",
    "74ahc139d.kicad_mod",
    "74ahc139d.glb",
    "74ahc139d.step",
    "74ahc139d.lbr",
    "docs/hero.png",
    "docs/74ahc139d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74ahc139d-hero.glb",
    "74ahc139d-hero.overlay.json",
    "74ahc139d-etched.glb"
  ],
  "component": {
    "mpn": "74AHC139D",
    "manufacturer": "Nexperia",
    "package": "SO-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://assets.nexperia.com/documents/data-sheet/74AHC139D.pdf",
    "parts": {
      "symbol": "74ahc139d.kicad_sym",
      "footprint": "74ahc139d.kicad_mod",
      "model_3d": "74ahc139d-hero.glb",
      "model_3d_plain": "74ahc139d-etched.glb",
      "model_3d_step": "74ahc139d-etched.step",
      "model_3d_step_plain": "74ahc139d.step",
      "lbr": "74ahc139d.lbr"
    },
    "distributor_links": {
      "lcsc": "C554244"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T18:50:48Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1E",
        "type": "input",
        "description": "Enable input for decoder 1, active LOW; when this input is HIGH all outputs 1Y0 to 1Y3 are forced HIGH."
      },
      {
        "number": "2",
        "name": "1A0",
        "type": "input",
        "description": "Binary-weighted address input (LSB) for decoder 1, decoded to mutually exclusive outputs 1Y0 to 1Y3."
      },
      {
        "number": "3",
        "name": "1A1",
        "type": "input",
        "description": "Binary-weighted address input (MSB) for decoder 1, decoded to mutually exclusive outputs 1Y0 to 1Y3."
      },
      {
        "number": "4",
        "name": "1Y0",
        "type": "output",
        "description": "Decoder 1 mutually exclusive output 0; output current limited to -25 mA to +25 mA per the limiting values."
      },
      {
        "number": "5",
        "name": "1Y1",
        "type": "output",
        "description": "Decoder 1 mutually exclusive output 1; output current limited to -25 mA to +25 mA per the limiting values."
      },
      {
        "number": "6",
        "name": "1Y2",
        "type": "output",
        "description": "Decoder 1 mutually exclusive output 2; output current limited to -25 mA to +25 mA per the limiting values."
      },
      {
        "number": "7",
        "name": "1Y3",
        "type": "output",
        "description": "Decoder 1 mutually exclusive output 3; output current limited to -25 mA to +25 mA per the limiting values."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for all voltages on the device."
      },
      {
        "number": "9",
        "name": "2Y3",
        "type": "output",
        "description": "Decoder 2 mutually exclusive output 3; output current limited to -25 mA to +25 mA per the limiting values."
      },
      {
        "number": "10",
        "name": "2Y2",
        "type": "output",
        "description": "Decoder 2 mutually exclusive output 2; output current limited to -25 mA to +25 mA per the limiting values."
      },
      {
        "number": "11",
        "name": "2Y1",
        "type": "output",
        "description": "Decoder 2 mutually exclusive output 1; output current limited to -25 mA to +25 mA per the limiting values."
      },
      {
        "number": "12",
        "name": "2Y0",
        "type": "output",
        "description": "Decoder 2 mutually exclusive output 0; output current limited to -25 mA to +25 mA per the limiting values."
      },
      {
        "number": "13",
        "name": "2A1",
        "type": "input",
        "description": "Binary-weighted address input (MSB) for decoder 2, decoded to mutually exclusive outputs 2Y0 to 2Y3."
      },
      {
        "number": "14",
        "name": "2A0",
        "type": "input",
        "description": "Binary-weighted address input (LSB) for decoder 2, decoded to mutually exclusive outputs 2Y0 to 2Y3."
      },
      {
        "number": "15",
        "name": "2E",
        "type": "input",
        "description": "Enable input for decoder 2, active LOW; when this input is HIGH all outputs 2Y0 to 2Y3 are forced HIGH."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; 2.0 V to 5.5 V for 74AHC139 and 4.5 V to 5.5 V for 74AHCT139 per the recommended operating conditions."
      }
    ],
    "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: The datasheet covers both 74AHC139 and 74AHCT139 in one document. The SO16 (D, SOT109-1) pinout is t"
        ],
        "pages_sent": 14,
        "cost_usd": 0.0674,
        "at": "2026-10-21T18:46:29"
      },
      "datasheet": {
        "url": "https://assets.nexperia.com/documents/data-sheet/74AHC139D.pdf",
        "pages": 14,
        "sha256": "fc7e24dfc738e83f",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "74ahc139d.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74ahc139d-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1c53565a7a989d943d80bf0dd27ae908d2b454fe8dd99cd516d6545e1ff8bb67",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}