MM74HCT245WM

{
  "slug": "mm74hct245wm",
  "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.",
  "tags": [
    "component",
    "logic ics",
    "mm74hct245wm",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mm74hct245wm.kicad_sym",
    "mm74hct245wm.kicad_mod",
    "mm74hct245wm.glb",
    "mm74hct245wm.step",
    "mm74hct245wm.lbr",
    "docs/hero.png",
    "docs/mm74hct245wm-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mm74hct245wm-hero.glb",
    "mm74hct245wm-hero.overlay.json",
    "mm74hct245wm-etched.glb"
  ],
  "component": {
    "mpn": "MM74HCT245WM",
    "manufacturer": "onsemi",
    "package": "SOIC-20-300mil",
    "pin_count": 20,
    "category": "Logic ICs",
    "subcategory": "Buffers / Drivers",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/mm74hct245wm-d.pdf",
    "parts": {
      "symbol": "mm74hct245wm.kicad_sym",
      "footprint": "mm74hct245wm.kicad_mod",
      "model_3d": "mm74hct245wm-hero.glb",
      "model_3d_plain": "mm74hct245wm-etched.glb",
      "model_3d_step": "mm74hct245wm-etched.step",
      "model_3d_step_plain": "mm74hct245wm.step",
      "lbr": "mm74hct245wm.lbr"
    },
    "distributor_links": {
      "lcsc": "C906744",
      "digikey": "2156-MM74HCT245WM-ND",
      "mouser": "512-MM74HCT245WM"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T09:28:38Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-MM74HCT245WM-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "512-MM74HCT245WM",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "DIR",
        "type": "input",
        "description": "Direction control input: HIGH passes data from A to B, LOW passes data from B to A."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "bidirectional",
        "description": "A-bus data I/O 1, 3-STATE; input when DIR is HIGH, output when DIR is LOW."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "bidirectional",
        "description": "A-bus data I/O 2, 3-STATE; input when DIR is HIGH, output when DIR is LOW."
      },
      {
        "number": "4",
        "name": "A3",
        "type": "bidirectional",
        "description": "A-bus data I/O 3, 3-STATE; input when DIR is HIGH, output when DIR is LOW."
      },
      {
        "number": "5",
        "name": "A4",
        "type": "bidirectional",
        "description": "A-bus data I/O 4, 3-STATE; input when DIR is HIGH, output when DIR is LOW."
      },
      {
        "number": "6",
        "name": "A5",
        "type": "bidirectional",
        "description": "A-bus data I/O 5, 3-STATE; input when DIR is HIGH, output when DIR is LOW."
      },
      {
        "number": "7",
        "name": "A6",
        "type": "bidirectional",
        "description": "A-bus data I/O 6, 3-STATE; input when DIR is HIGH, output when DIR is LOW."
      },
      {
        "number": "8",
        "name": "A7",
        "type": "bidirectional",
        "description": "A-bus data I/O 7, 3-STATE; input when DIR is HIGH, output when DIR is LOW."
      },
      {
        "number": "9",
        "name": "A8",
        "type": "bidirectional",
        "description": "A-bus data I/O 8, 3-STATE; input when DIR is HIGH, output when DIR is LOW."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground, 0 V reference."
      },
      {
        "number": "11",
        "name": "B8",
        "type": "bidirectional",
        "description": "B-bus data I/O 8, 3-STATE; output when DIR is HIGH, input when DIR is LOW."
      },
      {
        "number": "12",
        "name": "B7",
        "type": "bidirectional",
        "description": "B-bus data I/O 7, 3-STATE; output when DIR is HIGH, input when DIR is LOW."
      },
      {
        "number": "13",
        "name": "B6",
        "type": "bidirectional",
        "description": "B-bus data I/O 6, 3-STATE; output when DIR is HIGH, input when DIR is LOW."
      },
      {
        "number": "14",
        "name": "B5",
        "type": "bidirectional",
        "description": "B-bus data I/O 5, 3-STATE; output when DIR is HIGH, input when DIR is LOW."
      },
      {
        "number": "15",
        "name": "B4",
        "type": "bidirectional",
        "description": "B-bus data I/O 4, 3-STATE; output when DIR is HIGH, input when DIR is LOW."
      },
      {
        "number": "16",
        "name": "B3",
        "type": "bidirectional",
        "description": "B-bus data I/O 3, 3-STATE; output when DIR is HIGH, input when DIR is LOW."
      },
      {
        "number": "17",
        "name": "B2",
        "type": "bidirectional",
        "description": "B-bus data I/O 2, 3-STATE; output when DIR is HIGH, input when DIR is LOW."
      },
      {
        "number": "18",
        "name": "B1",
        "type": "bidirectional",
        "description": "B-bus data I/O 1, 3-STATE; output when DIR is HIGH, input when DIR is LOW."
      },
      {
        "number": "19",
        "name": "G",
        "type": "input",
        "description": "Active-low enable input; when HIGH the A and B buses are isolated (outputs 3-STATE)."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, recommended 4.5 V to 5.5 V (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+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 10,
        "cost_usd": 0.3102,
        "at": "2026-10-31T09:28:19"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/mm74hct245wm-d.pdf",
        "pages": 10,
        "sha256": "6d9408b00aa346a8",
        "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": "mm74hct245wm.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          12.8,
          2.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "59a10b341e6972b31d81802a048060326da627d8b92dcf4263064f4f62ec808e",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mm74hct245wm-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          12.8,
          2.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "5171bca0d9081785aefa3adbcc0efbf209226849d641f7b5ba2526f0c3c30860",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}