MC74VHC138DTR2G

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  "type": "component",
  "slug": "mc74vhc138dtr2g",
  "title": "MC74VHC138DTR2G",
  "brief": "onsemi Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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    "logic",
    "mc74vhc138dtr2g",
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  "component": {
    "mpn": "MC74VHC138DTR2G",
    "manufacturer": "onsemi",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/mc74vhc138dtr2-d.pdf",
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    },
    "distributor_links": {
      "lcsc": "C463311",
      "digikey": "MC74VHC138DTR2GOSTR-ND",
      "mouser": "863-MC74VHC138DTR2G"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T04:36:14Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "MC74VHC138DTR2GOSTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "863-MC74VHC138DTR2G",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A0",
        "type": "input",
        "description": "Binary select input A0 of the 3-to-8 decoder; inputs tolerate up to 7 V and must be held within GND to VCC or tied to a logic level when unused."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Binary select input A1 of the 3-to-8 decoder; inputs tolerate up to 7 V and must be held within GND to VCC or tied to a logic level when unused."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "Binary select input A2 of the 3-to-8 decoder; inputs tolerate up to 7 V and must be held within GND to VCC or tied to a logic level when unused."
      },
      {
        "number": "4",
        "name": "E1",
        "type": "input",
        "description": "Active-high enable input; when E1 is held High the decoding function is inhibited and all outputs go High."
      },
      {
        "number": "5",
        "name": "E2",
        "type": "input",
        "description": "Active-high enable input; when E2 is held High the decoding function is inhibited and all outputs go High."
      },
      {
        "number": "6",
        "name": "E3",
        "type": "input",
        "description": "Active-low enable input; when E3 is held Low the decoding function is inhibited and all outputs go High."
      },
      {
        "number": "7",
        "name": "Y7",
        "type": "output",
        "description": "Active-low decoded output Y7, driven by a buffer stage that goes Low when the address is 111 with the device enabled."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device; Vin and Vout must stay within GND to VCC."
      },
      {
        "number": "9",
        "name": "Y6",
        "type": "output",
        "description": "Active-low decoded output Y6, goes Low when the address is 110 with the device enabled."
      },
      {
        "number": "10",
        "name": "Y5",
        "type": "output",
        "description": "Active-low decoded output Y5, goes Low when the address is 101 with the device enabled."
      },
      {
        "number": "11",
        "name": "Y4",
        "type": "output",
        "description": "Active-low decoded output Y4, goes Low when the address is 100 with the device enabled."
      },
      {
        "number": "12",
        "name": "Y3",
        "type": "output",
        "description": "Active-low decoded output Y3, goes Low when the address is 011 with the device enabled."
      },
      {
        "number": "13",
        "name": "Y2",
        "type": "output",
        "description": "Active-low decoded output Y2, goes Low when the address is 010 with the device enabled."
      },
      {
        "number": "14",
        "name": "Y1",
        "type": "output",
        "description": "Active-low decoded output Y1, goes Low when the address is 001 with the device enabled."
      },
      {
        "number": "15",
        "name": "Y0",
        "type": "output",
        "description": "Active-low decoded output Y0, goes Low when the address is 000 with the device enabled."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply; the datasheet specifies a DC supply range of 2.0 V to 5.5 V and absolute maximum of -0.5 V to 7.0 V."
      }
    ],
    "provenance": {
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        "primary_model": "claude-haiku-5-5",
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        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
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        "at": "2026-10-18T04:31:24"
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        "pages": 8,
        "sha256": "20c8764ebb22ca67",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
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        "total": 16,
        "described": 16,
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  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "TSSOP-16",
      "Category": "Logic",
      "Pins": "16"
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    "characteristics": {
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          "name": "DC Supply Voltage",
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          "name": "Power Dissipation in Still Air, TSSOP Package",
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          "name": "Minimum High-Level Output Voltage",
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          "name": "Minimum High-Level Output Voltage",
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          "name": "Minimum High-Level Output Voltage",
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