MC74AC245DTR2G

{
  "slug": "mc74ac245dtr2g",
  "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",
    "mc74ac245dtr2g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mc74ac245dtr2g.kicad_sym",
    "mc74ac245dtr2g.kicad_mod",
    "mc74ac245dtr2g.glb",
    "mc74ac245dtr2g.step",
    "mc74ac245dtr2g.lbr",
    "docs/hero.png",
    "docs/mc74ac245dtr2g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mc74ac245dtr2g-hero.glb",
    "mc74ac245dtr2g-hero.overlay.json",
    "mc74ac245dtr2g-etched.glb"
  ],
  "component": {
    "mpn": "MC74AC245DTR2G",
    "manufacturer": "onsemi",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Buffers, Drivers, Receivers, Transceivers",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/mc74ac245dtr2-d.pdf",
    "parts": {
      "symbol": "mc74ac245dtr2g.kicad_sym",
      "footprint": "mc74ac245dtr2g.kicad_mod",
      "model_3d": "mc74ac245dtr2g-hero.glb",
      "model_3d_plain": "mc74ac245dtr2g-etched.glb",
      "model_3d_step": "mc74ac245dtr2g-etched.step",
      "model_3d_step_plain": "mc74ac245dtr2g.step",
      "lbr": "mc74ac245dtr2g.lbr"
    },
    "distributor_links": {
      "lcsc": "C903975",
      "mouser": "863-MC74AC245DTR2G"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T18:34:01Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": "863-MC74AC245DTR2G",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "T/R",
        "type": "input",
        "description": "Transmit/Receive input sets the data direction: HIGH enables data from A ports to B ports (transmit), and LOW enables data from B ports to A ports (receive)."
      },
      {
        "number": "2",
        "name": "A0",
        "type": "bidirectional",
        "description": "Side A 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "3",
        "name": "A1",
        "type": "bidirectional",
        "description": "Side A 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "4",
        "name": "A2",
        "type": "bidirectional",
        "description": "Side A 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "5",
        "name": "A3",
        "type": "bidirectional",
        "description": "Side A 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "6",
        "name": "A4",
        "type": "bidirectional",
        "description": "Side A 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "7",
        "name": "A5",
        "type": "bidirectional",
        "description": "Side A 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "8",
        "name": "A6",
        "type": "bidirectional",
        "description": "Side A 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "9",
        "name": "A7",
        "type": "bidirectional",
        "description": "Side A 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference; all DC input and output voltages are referenced to GND."
      },
      {
        "number": "11",
        "name": "B7",
        "type": "bidirectional",
        "description": "Side B 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "12",
        "name": "B6",
        "type": "bidirectional",
        "description": "Side B 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "13",
        "name": "B5",
        "type": "bidirectional",
        "description": "Side B 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "14",
        "name": "B4",
        "type": "bidirectional",
        "description": "Side B 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "15",
        "name": "B3",
        "type": "bidirectional",
        "description": "Side B 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "16",
        "name": "B2",
        "type": "bidirectional",
        "description": "Side B 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "17",
        "name": "B1",
        "type": "bidirectional",
        "description": "Side B 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "18",
        "name": "B0",
        "type": "bidirectional",
        "description": "Side B 3-state input or 3-state output, rated for 24 mA sink/source at the A and B ports (IOL = 24 mA, IOH = −24 mA)."
      },
      {
        "number": "19",
        "name": "OE",
        "type": "input",
        "description": "Output Enable input; when HIGH it disables both A and B ports by placing them in a High Z condition."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage: 2.0 V to 6.0 V for ′AC devices and 4.5 V to 5.5 V for ′ACT devices, referenced to GND (absolute maximum −0.5 V to +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 pin-to-signal mapping is inferred from the scrambled text of Figure 1 (page 1), which has no exp; Pin 1 (T/R), pin 10 (GND), pin 19 (OE) and pin 20 (VCC) are the pins most likely to be misread from ; The MPN MC74AC245DTR2G is listed on page 6 as TSSOP-20 (Pb-Free), 2500 per tape and reel, so the TSS"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0666,
        "at": "2026-10-21T18:28:42"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/mc74ac245dtr2-d.pdf",
        "pages": 9,
        "sha256": "a28a6cb76feeacd2",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mc74ac245dtr2g.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mc74ac245dtr2g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "245cb113ff001d925d34426ff33c60883ed09e716d9be2095c92528a3239d124",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}