MC74VHC540DTR2G

{
  "slug": "mc74vhc540dtr2g",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "mc74vhc540dtr2g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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  "component": {
    "mpn": "MC74VHC540DTR2G",
    "manufacturer": "onsemi",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Buffers, Drivers, Receivers, Transceivers",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/mc74vhc540dtr2-d.pdf",
    "parts": {
      "symbol": "mc74vhc540dtr2g.kicad_sym",
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      "lbr": "mc74vhc540dtr2g.lbr"
    },
    "distributor_links": {
      "lcsc": "C904194",
      "digikey": "MC74VHC540DTR2GOSTR-ND",
      "mouser": "863-MC74VHC540DTR2G"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T19:07:19Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "MC74VHC540DTR2GOSTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "863-MC74VHC540DTR2G",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OE1",
        "type": "input",
        "description": "Active-low output enable 1, ANDed with OE2; when OE1 or OE2 is high the terminal outputs are forced to the high-impedance state."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Data input A1 tolerates up to 7.0 V and must be held within GND to VCC for proper operation, with unused inputs tied to GND or VCC."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "Data input A2 tolerates up to 7.0 V and must be held within GND to VCC for proper operation, with unused inputs tied to GND or VCC."
      },
      {
        "number": "4",
        "name": "A3",
        "type": "input",
        "description": "Data input A3 tolerates up to 7.0 V and must be held within GND to VCC for proper operation, with unused inputs tied to GND or VCC."
      },
      {
        "number": "5",
        "name": "A4",
        "type": "input",
        "description": "Data input A4 tolerates up to 7.0 V and must be held within GND to VCC for proper operation, with unused inputs tied to GND or VCC."
      },
      {
        "number": "6",
        "name": "A5",
        "type": "input",
        "description": "Data input A5 tolerates up to 7.0 V and must be held within GND to VCC for proper operation, with unused inputs tied to GND or VCC."
      },
      {
        "number": "7",
        "name": "A6",
        "type": "input",
        "description": "Data input A6 tolerates up to 7.0 V and must be held within GND to VCC for proper operation, with unused inputs tied to GND or VCC."
      },
      {
        "number": "8",
        "name": "A7",
        "type": "input",
        "description": "Data input A7 tolerates up to 7.0 V and must be held within GND to VCC for proper operation, with unused inputs tied to GND or VCC."
      },
      {
        "number": "9",
        "name": "A8",
        "type": "input",
        "description": "Data input A8 tolerates up to 7.0 V and must be held within GND to VCC for proper operation, with unused inputs tied to GND or VCC."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference; Vin and Vout must be constrained to the range GND to VCC for proper operation."
      },
      {
        "number": "11",
        "name": "Y8",
        "type": "tri_state",
        "description": "Inverting three-state output Y8 is high-impedance when either output enable is high, and unused outputs must be left open; rated ±25 mA per pin."
      },
      {
        "number": "12",
        "name": "Y7",
        "type": "tri_state",
        "description": "Inverting three-state output Y7 is high-impedance when either output enable is high, and unused outputs must be left open; rated ±25 mA per pin."
      },
      {
        "number": "13",
        "name": "Y6",
        "type": "tri_state",
        "description": "Inverting three-state output Y6 is high-impedance when either output enable is high, and unused outputs must be left open; rated ±25 mA per pin."
      },
      {
        "number": "14",
        "name": "Y5",
        "type": "tri_state",
        "description": "Inverting three-state output Y5 is high-impedance when either output enable is high, and unused outputs must be left open; rated ±25 mA per pin."
      },
      {
        "number": "15",
        "name": "Y4",
        "type": "tri_state",
        "description": "Inverting three-state output Y4 is high-impedance when either output enable is high, and unused outputs must be left open; rated ±25 mA per pin."
      },
      {
        "number": "16",
        "name": "Y3",
        "type": "tri_state",
        "description": "Inverting three-state output Y3 is high-impedance when either output enable is high, and unused outputs must be left open; rated ±25 mA per pin."
      },
      {
        "number": "17",
        "name": "Y2",
        "type": "tri_state",
        "description": "Inverting three-state output Y2 is high-impedance when either output enable is high, and unused outputs must be left open; rated ±25 mA per pin."
      },
      {
        "number": "18",
        "name": "Y1",
        "type": "tri_state",
        "description": "Inverting three-state output Y1 is high-impedance when either output enable is high, and unused outputs must be left open; rated ±25 mA per pin."
      },
      {
        "number": "19",
        "name": "OE2",
        "type": "input",
        "description": "Active-low output enable 2, ANDed with OE1; when OE1 or OE2 is high the terminal outputs are forced to the high-impedance state."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply; recommended operating range 2.0 V to 5.5 V, with absolute maximum 7.0 V."
      }
    ],
    "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 page 1 pin assignment text is a scrambled extraction. The pin-to-signal mapping was reconstructe; The TSSOP-20 drawing (page 7) states its terminal numbers are for reference only, so the pinout is t; The datasheet has no separate pinout for the TSSOP variant. The DT (TSSOP-20) and DW (SOIC-20) packa"
        ],
        "pages_sent": 8,
        "cost_usd": 0.0598,
        "at": "2026-10-21T19:02:53"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/mc74vhc540dtr2-d.pdf",
        "pages": 8,
        "sha256": "658a08d2dba59491",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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}