74AC244MTC

{
  "slug": "74ac244mtc",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Buffers / Drivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic ics",
    "74ac244mtc",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74ac244mtc.kicad_sym",
    "74ac244mtc.kicad_mod",
    "74ac244mtc.glb",
    "74ac244mtc.step",
    "74ac244mtc.lbr",
    "docs/hero.png",
    "docs/74ac244mtc-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74ac244mtc-hero.glb",
    "74ac244mtc-hero.overlay.json",
    "74ac244mtc-etched.glb"
  ],
  "component": {
    "mpn": "74AC244MTC",
    "manufacturer": "onsemi",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic ICs",
    "subcategory": "Buffers / Drivers",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/74ac244mtc-d.pdf",
    "parts": {
      "symbol": "74ac244mtc.kicad_sym",
      "footprint": "74ac244mtc.kicad_mod",
      "model_3d": "74ac244mtc-hero.glb",
      "model_3d_plain": "74ac244mtc-etched.glb",
      "model_3d_step": "74ac244mtc-etched.step",
      "model_3d_step_plain": "74ac244mtc.step",
      "lbr": "74ac244mtc.lbr"
    },
    "distributor_links": {
      "lcsc": "C897413",
      "digikey": "74AC244MTC-ND",
      "mouser": "512-74AC244MTC"
    },
    "distributor_check": {
      "checked_at": "2026-10-26T19:35:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "74AC244MTC-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "512-74AC244MTC",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OE1",
        "type": "input",
        "description": "3-STATE output enable input for outputs O0-O3 (pins 18, 16, 14, 12); outputs are enabled when low and high-impedance when high."
      },
      {
        "number": "2",
        "name": "I0",
        "type": "input",
        "description": "Data input I0 that drives output O0 when OE1 is low."
      },
      {
        "number": "3",
        "name": "O4",
        "type": "tri_state",
        "description": "3-STATE output O4, sources/sinks 24 mA, high-impedance when OE2 is high."
      },
      {
        "number": "4",
        "name": "I1",
        "type": "input",
        "description": "Data input I1 that drives output O1 when OE1 is low."
      },
      {
        "number": "5",
        "name": "O5",
        "type": "tri_state",
        "description": "3-STATE output O5, sources/sinks 24 mA, high-impedance when OE2 is high."
      },
      {
        "number": "6",
        "name": "I2",
        "type": "input",
        "description": "Data input I2 that drives output O2 when OE1 is low."
      },
      {
        "number": "7",
        "name": "O6",
        "type": "tri_state",
        "description": "3-STATE output O6, sources/sinks 24 mA, high-impedance when OE2 is high."
      },
      {
        "number": "8",
        "name": "I3",
        "type": "input",
        "description": "Data input I3 that drives output O3 when OE1 is low."
      },
      {
        "number": "9",
        "name": "O7",
        "type": "tri_state",
        "description": "3-STATE output O7, sources/sinks 24 mA, high-impedance when OE2 is high."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "11",
        "name": "I7",
        "type": "input",
        "description": "Data input I7 that drives output O7 when OE2 is low."
      },
      {
        "number": "12",
        "name": "O3",
        "type": "tri_state",
        "description": "3-STATE output O3, sources/sinks 24 mA, high-impedance when OE1 is high."
      },
      {
        "number": "13",
        "name": "I6",
        "type": "input",
        "description": "Data input I6 that drives output O6 when OE2 is low."
      },
      {
        "number": "14",
        "name": "O2",
        "type": "tri_state",
        "description": "3-STATE output O2, sources/sinks 24 mA, high-impedance when OE1 is high."
      },
      {
        "number": "15",
        "name": "I5",
        "type": "input",
        "description": "Data input I5 that drives output O5 when OE2 is low."
      },
      {
        "number": "16",
        "name": "O1",
        "type": "tri_state",
        "description": "3-STATE output O1, sources/sinks 24 mA, high-impedance when OE1 is high."
      },
      {
        "number": "17",
        "name": "I4",
        "type": "input",
        "description": "Data input I4 that drives output O4 when OE2 is low."
      },
      {
        "number": "18",
        "name": "O0",
        "type": "tri_state",
        "description": "3-STATE output O0, sources/sinks 24 mA, high-impedance when OE1 is high."
      },
      {
        "number": "19",
        "name": "OE2",
        "type": "input",
        "description": "3-STATE output enable input for outputs O4-O7 (pins 3, 5, 7, 9); outputs are enabled when low and high-impedance when high."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; recommended 2.0 to 6.0 V for AC (4.5 to 5.5 V for ACT), absolute maximum −0.5 to +7.0 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The connection diagram text on page 1 lacks pin numbers. I took them from the order of the pin names; The data inputs and outputs are paired by the standard 244 function and the truth tables, not by an ",
          "5/20 pins cited to the wrong page (name found elsewhere): ['10:GND@p1', '11:I7@p1', '13:I6@p1', '17:I4@p1']"
        ],
        "pages_sent": 11,
        "cost_usd": 0.1398,
        "at": "2026-10-26T19:35:13"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/74ac244mtc-d.pdf",
        "pages": 11,
        "sha256": "99ad504f29a09b78",
        "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": "74ac244mtc.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": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74ac244mtc-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": "8b09fa6b4e757bb07f5d9d0c9695f8a1570ced6114f210889074f7effd5a789f",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}