74HCT139D

{
  "slug": "74hct139d",
  "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": [
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    "logic",
    "74hct139d",
    "factory-2.0.0",
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  "component": {
    "mpn": "74HCT139D",
    "manufacturer": "Nexperia",
    "package": "SO-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588913597796003840",
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      "lbr": "74hct139d.lbr"
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    "distributor_links": {
      "lcsc": "C545677"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T12:56:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1E",
        "type": "input",
        "description": "Active-LOW enable input for decoder 1; when it is HIGH, all outputs 1Y0 to 1Y3 are forced HIGH."
      },
      {
        "number": "2",
        "name": "1A0",
        "type": "input",
        "description": "Address input bit 0 for decoder 1 (binary weight 1), which selects one of outputs 1Y0 to 1Y3."
      },
      {
        "number": "3",
        "name": "1A1",
        "type": "input",
        "description": "Address input bit 1 for decoder 1 (binary weight 2), which selects one of outputs 1Y0 to 1Y3."
      },
      {
        "number": "4",
        "name": "1Y0",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 0 of decoder 1, LOW when nE is LOW and nA1 nA0 = 00."
      },
      {
        "number": "5",
        "name": "1Y1",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 1 of decoder 1, LOW when nE is LOW and nA1 nA0 = 01."
      },
      {
        "number": "6",
        "name": "1Y2",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 2 of decoder 1, LOW when nE is LOW and nA1 nA0 = 10."
      },
      {
        "number": "7",
        "name": "1Y3",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 3 of decoder 1, LOW when nE is LOW and nA1 nA0 = 11."
      },
      {
        "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": "Active-LOW mutually exclusive output 3 of decoder 2, LOW when 2E is LOW and 2A1 2A0 = 11."
      },
      {
        "number": "10",
        "name": "2Y2",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 2 of decoder 2, LOW when 2E is LOW and 2A1 2A0 = 10."
      },
      {
        "number": "11",
        "name": "2Y1",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 1 of decoder 2, LOW when 2E is LOW and 2A1 2A0 = 01."
      },
      {
        "number": "12",
        "name": "2Y0",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 0 of decoder 2, LOW when 2E is LOW and 2A1 2A0 = 00."
      },
      {
        "number": "13",
        "name": "2A1",
        "type": "input",
        "description": "Address input bit 1 for decoder 2 (binary weight 2), which selects one of outputs 2Y0 to 2Y3."
      },
      {
        "number": "14",
        "name": "2A0",
        "type": "input",
        "description": "Address input bit 0 for decoder 2 (binary weight 1), which selects one of outputs 2Y0 to 2Y3."
      },
      {
        "number": "15",
        "name": "2E",
        "type": "input",
        "description": "Active-LOW enable input for decoder 2; when it is HIGH, all outputs 2Y0 to 2Y3 are forced HIGH."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage; the 74HCT139 recommended range is 4.5 V to 5.5 V with respect to GND."
      }
    ],
    "provenance": {
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        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 13,
        "cost_usd": 0.0713,
        "at": "2026-10-18T12:52:47"
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        "pages": 13,
        "sha256": "388b7843cfdd5442",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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}