74HC138DRG

{
  "slug": "74hc138drg",
  "version": "0.1.0",
  "type": "component",
  "description": "HANSCHIP semiconductor Signal Switches, Multiplexers, Decoders, SOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74hc138drg",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
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  "component": {
    "mpn": "74HC138DRG",
    "manufacturer": "HANSCHIP semiconductor",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603358269725962240",
    "parts": {
      "symbol": "74hc138drg.kicad_sym",
      "footprint": "74hc138drg.kicad_mod",
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      "lbr": "74hc138drg.lbr"
    },
    "distributor_links": {
      "lcsc": "C22439339"
    },
    "distributor_check": {
      "checked_at": "2026-10-15T14:20:29Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A",
        "type": "input",
        "description": "Data/address input A, the least significant bit of the 3-bit binary select code that chooses one of the eight outputs."
      },
      {
        "number": "2",
        "name": "B",
        "type": "input",
        "description": "Data/address input B, the middle bit of the 3-bit binary select code that chooses one of the eight outputs."
      },
      {
        "number": "3",
        "name": "C",
        "type": "input",
        "description": "Data/address input C, the most significant bit of the 3-bit binary select code that chooses one of the eight outputs."
      },
      {
        "number": "4",
        "name": "G2B",
        "type": "input",
        "description": "Active-low enable input; combined with G2A as G2 = G2A + G2B, the decoder is enabled only when both G2A and G2B are low (together with G1 high)."
      },
      {
        "number": "5",
        "name": "G2A",
        "type": "input",
        "description": "Active-low enable input; combined with G2B as G2 = G2A + G2B, the decoder is enabled only when both G2A and G2B are low (together with G1 high)."
      },
      {
        "number": "6",
        "name": "G1",
        "type": "input",
        "description": "Active-high enable input; the decoder outputs are enabled only when G1 is high (together with G2A and G2B low)."
      },
      {
        "number": "7",
        "name": "Y7",
        "type": "output",
        "description": "Decoded active-low output 7 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground pin."
      },
      {
        "number": "9",
        "name": "Y6",
        "type": "output",
        "description": "Decoded active-low output 6 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "10",
        "name": "Y5",
        "type": "output",
        "description": "Decoded active-low output 5 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "11",
        "name": "Y4",
        "type": "output",
        "description": "Decoded active-low output 4 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "12",
        "name": "Y3",
        "type": "output",
        "description": "Decoded active-low output 3 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "13",
        "name": "Y2",
        "type": "output",
        "description": "Decoded active-low output 2 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "14",
        "name": "Y1",
        "type": "output",
        "description": "Decoded active-low output 1 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "15",
        "name": "Y0",
        "type": "output",
        "description": "Decoded active-low output 0 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply pin."
      }
    ],
    "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 pin table and package diagram label pin 4 as G2B and pin 5 as G2A, and the bar overlin; Output and input function descriptions are summarized from the page-2 function table and truth table; The datasheet gives VCC and GND only as '电源正' and '电源地' with no SOP-specific pin drawing. The SOP-16"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0449,
        "at": "2026-10-15T14:20:12"
      },
      "datasheet": {
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        "pages": 10,
        "sha256": "ff89870c2a241011",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
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  }
}