XL74LS139

{
  "slug": "xl74ls139",
  "version": "0.1.0",
  "type": "component",
  "description": "XINLUDA Signal Switches, Multiplexers, Decoders, SOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "xl74ls139",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "xl74ls139.kicad_sym",
    "xl74ls139.kicad_mod",
    "xl74ls139.glb",
    "xl74ls139.step",
    "xl74ls139.lbr",
    "docs/hero.png",
    "docs/xl74ls139-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "xl74ls139-hero.glb",
    "xl74ls139-hero.overlay.json",
    "xl74ls139-etched.glb"
  ],
  "component": {
    "mpn": "XL74LS139",
    "manufacturer": "XINLUDA",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905362212720640",
    "parts": {
      "symbol": "xl74ls139.kicad_sym",
      "footprint": "xl74ls139.kicad_mod",
      "model_3d": "xl74ls139-hero.glb",
      "model_3d_plain": "xl74ls139-etched.glb",
      "model_3d_step": "xl74ls139-etched.step",
      "model_3d_step_plain": "xl74ls139.step",
      "lbr": "xl74ls139.lbr"
    },
    "distributor_links": {
      "lcsc": "C521174"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T23:51:54Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1G",
        "type": "input",
        "description": "Active-low enable input for decoder 1; can be used as a data line in demultiplexing applications."
      },
      {
        "number": "2",
        "name": "1A",
        "type": "input",
        "description": "Select input A (LSB) of decoder 1; fully buffered, one normalized load, Schottky-clamped, VIH min 2 V and VIL max 0.8 V."
      },
      {
        "number": "3",
        "name": "1B",
        "type": "input",
        "description": "Select input B (MSB) of decoder 1; fully buffered, one normalized load, Schottky-clamped, VIH min 2 V and VIL max 0.8 V."
      },
      {
        "number": "4",
        "name": "1Y0",
        "type": "output",
        "description": "Active-low output 0 of decoder 1; low when enabled and select BA = LL, IOL max 8 mA, IOH max -0.4 mA."
      },
      {
        "number": "5",
        "name": "1Y1",
        "type": "output",
        "description": "Active-low output 1 of decoder 1; low when enabled and select BA = LH, IOL max 8 mA, IOH max -0.4 mA."
      },
      {
        "number": "6",
        "name": "1Y2",
        "type": "output",
        "description": "Active-low output 2 of decoder 1; low when enabled and select BA = HL, IOL max 8 mA, IOH max -0.4 mA."
      },
      {
        "number": "7",
        "name": "1Y3",
        "type": "output",
        "description": "Active-low output 3 of decoder 1; low when enabled and select BA = HH, IOL max 8 mA, IOH max -0.4 mA."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V) for the device."
      },
      {
        "number": "9",
        "name": "2Y3",
        "type": "output",
        "description": "Active-low output 3 of decoder 2; low when enabled and select BA = HH, IOL max 8 mA, IOH max -0.4 mA."
      },
      {
        "number": "10",
        "name": "2Y2",
        "type": "output",
        "description": "Active-low output 2 of decoder 2; low when enabled and select BA = HL, IOL max 8 mA, IOH max -0.4 mA."
      },
      {
        "number": "11",
        "name": "2Y1",
        "type": "output",
        "description": "Active-low output 1 of decoder 2; low when enabled and select BA = LH, IOL max 8 mA, IOH max -0.4 mA."
      },
      {
        "number": "12",
        "name": "2Y0",
        "type": "output",
        "description": "Active-low output 0 of decoder 2; low when enabled and select BA = LL, IOL max 8 mA, IOH max -0.4 mA."
      },
      {
        "number": "13",
        "name": "2B",
        "type": "input",
        "description": "Select input B (MSB) of decoder 2; fully buffered, one normalized load, Schottky-clamped, VIH min 2 V and VIL max 0.8 V."
      },
      {
        "number": "14",
        "name": "2A",
        "type": "input",
        "description": "Select input A (LSB) of decoder 2; fully buffered, one normalized load, Schottky-clamped, VIH min 2 V and VIL max 0.8 V."
      },
      {
        "number": "15",
        "name": "2G",
        "type": "input",
        "description": "Active-low enable input for decoder 2; can be used as a data line in demultiplexing applications."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, recommended 4.75 V to 5.25 V (5 V nominal), absolute maximum 7 V."
      }
    ],
    "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+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet electrical tables are labeled '74LS153' rather than 74LS139 (apparent copy-paste error); l; SOP16 chosen because the ordering table lists XL74LS139 as SOP16 (XD74LS139 is the DIP16); the pinou",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 8,
        "cost_usd": 0.2191,
        "at": "2026-10-18T23:49:49"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905362212720640",
        "pages": 8,
        "sha256": "e2ff59f97cf6c429",
        "source_tier": "lcsc"
      },
      "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": "xl74ls139.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": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "xl74ls139-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": "594d20ec6e9a8beac5019d1079122c23b0e7d2f637893f4c292130c337632ebc",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}