MC74HC240ADWR2G

{
  "slug": "mc74hc240adwr2g",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Buffers / Drivers, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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    "mpn": "MC74HC240ADWR2G",
    "manufacturer": "onsemi",
    "package": "SOIC-20-300mil",
    "pin_count": 20,
    "category": "Logic ICs",
    "subcategory": "Buffers / Drivers",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/mc74hc240adwr2-d.pdf",
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    "distributor_links": {
      "lcsc": "C899700",
      "digikey": "MC74HC240ADWR2GOSTR-ND",
      "mouser": "863-MC74HC240ADWR2G"
    },
    "distributor_check": {
      "checked_at": "2026-10-26T19:17:56Z",
      "source": "Component Ocean /api/assign-pns",
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        "pn": "MC74HC240ADWR2GOSTR-ND",
        "status": "found",
        "lifecycle": "Active"
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        "pn": "863-MC74HC240ADWR2G",
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    "pins": [
      {
        "number": "1",
        "name": "ENABLE A",
        "type": "input",
        "description": "Active-low output enable for the YA outputs; low enables them as inverters, high puts them in high impedance."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Data input 1 of group A; appears inverted on YA1 when the outputs are enabled."
      },
      {
        "number": "3",
        "name": "YB4",
        "type": "tri_state",
        "description": "Inverting 3-state output of group B, high impedance when Enable B is high."
      },
      {
        "number": "4",
        "name": "A2",
        "type": "input",
        "description": "Data input 2 of group A; appears inverted on YA2 when the outputs are enabled."
      },
      {
        "number": "5",
        "name": "YB3",
        "type": "tri_state",
        "description": "Inverting 3-state output of group B, high impedance when Enable B is high."
      },
      {
        "number": "6",
        "name": "A3",
        "type": "input",
        "description": "Data input 3 of group A; appears inverted on YA3 when the outputs are enabled."
      },
      {
        "number": "7",
        "name": "YB2",
        "type": "tri_state",
        "description": "Inverting 3-state output of group B, high impedance when Enable B is high."
      },
      {
        "number": "8",
        "name": "A4",
        "type": "input",
        "description": "Data input 4 of group A; appears inverted on YA4 when the outputs are enabled."
      },
      {
        "number": "9",
        "name": "YB1",
        "type": "tri_state",
        "description": "Inverting 3-state output of group B, high impedance when Enable B is high."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V reference) for the device."
      },
      {
        "number": "11",
        "name": "B1",
        "type": "input",
        "description": "Data input 1 of group B; appears inverted on YB1 when the outputs are enabled."
      },
      {
        "number": "12",
        "name": "YA4",
        "type": "tri_state",
        "description": "Inverting 3-state output of group A, high impedance when Enable A is high."
      },
      {
        "number": "13",
        "name": "B2",
        "type": "input",
        "description": "Data input 2 of group B; appears inverted on YB2 when the outputs are enabled."
      },
      {
        "number": "14",
        "name": "YA3",
        "type": "tri_state",
        "description": "Inverting 3-state output of group A, high impedance when Enable A is high."
      },
      {
        "number": "15",
        "name": "B3",
        "type": "input",
        "description": "Data input 3 of group B; appears inverted on YB3 when the outputs are enabled."
      },
      {
        "number": "16",
        "name": "YA2",
        "type": "tri_state",
        "description": "Inverting 3-state output of group A, high impedance when Enable A is high."
      },
      {
        "number": "17",
        "name": "B4",
        "type": "input",
        "description": "Data input 4 of group B; appears inverted on YB4 when the outputs are enabled."
      },
      {
        "number": "18",
        "name": "YA1",
        "type": "tri_state",
        "description": "Inverting 3-state output of group A, high impedance when Enable A is high."
      },
      {
        "number": "19",
        "name": "ENABLE B",
        "type": "input",
        "description": "Active-low output enable for the YB outputs; low enables them as inverters, high puts them in high impedance."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage, recommended operating range 2.0 to 6.0 V (absolute maximum 7.0 V)."
      }
    ],
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
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        "cost_usd": 0.1196,
        "at": "2026-10-26T19:17:31"
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      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/mc74hc240adwr2-d.pdf",
        "pages": 8,
        "sha256": "00c1a4065eb3b90d",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
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