74HC245KAJ

{
  "schema_version": 1,
  "type": "component",
  "slug": "74hc245kaj",
  "title": "74HC245KAJ",
  "brief": "Shenzhen Fuman Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "74hc245kaj",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "74HC245KAJ",
    "manufacturer": "Shenzhen Fuman",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Buffers, Drivers, Receivers, Transceivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590910725999583232",
    "parts": {
      "symbol": "74hc245kaj.kicad_sym",
      "footprint": "74hc245kaj.kicad_mod",
      "model_3d": "74hc245kaj-etched.glb",
      "model_3d_plain": "74hc245kaj.glb",
      "model_3d_step": "74hc245kaj-etched.step",
      "model_3d_step_plain": "74hc245kaj.step",
      "lbr": "74hc245kaj.lbr"
    },
    "distributor_links": {
      "lcsc": "C19192982"
    },
    "pins": [
      {
        "number": "1",
        "name": "DIR",
        "type": "input",
        "description": "Direction control input; selects data path direction (low = B to A, high = A to B)."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "bidirectional",
        "description": "Data input/output terminal A1; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "bidirectional",
        "description": "Data input/output terminal A2; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "4",
        "name": "A3",
        "type": "bidirectional",
        "description": "Data input/output terminal A3; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "5",
        "name": "A4",
        "type": "bidirectional",
        "description": "Data input/output terminal A4; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "6",
        "name": "A5",
        "type": "bidirectional",
        "description": "Data input/output terminal A5; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "7",
        "name": "A6",
        "type": "bidirectional",
        "description": "Data input/output terminal A6; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "8",
        "name": "A7",
        "type": "bidirectional",
        "description": "Data input/output terminal A7; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "9",
        "name": "A8",
        "type": "bidirectional",
        "description": "Data input/output terminal A8; output when /OE low and DIR = 1, input when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Logic ground (0 V reference)."
      },
      {
        "number": "11",
        "name": "B8",
        "type": "bidirectional",
        "description": "Data input/output terminal B8; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "12",
        "name": "B7",
        "type": "bidirectional",
        "description": "Data input/output terminal B7; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "13",
        "name": "B6",
        "type": "bidirectional",
        "description": "Data input/output terminal B6; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "14",
        "name": "B5",
        "type": "bidirectional",
        "description": "Data input/output terminal B5; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "15",
        "name": "B4",
        "type": "bidirectional",
        "description": "Data input/output terminal B4; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "16",
        "name": "B3",
        "type": "bidirectional",
        "description": "Data input/output terminal B3; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "17",
        "name": "B2",
        "type": "bidirectional",
        "description": "Data input/output terminal B2; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "18",
        "name": "B1",
        "type": "bidirectional",
        "description": "Data input/output terminal B1; input when /OE low and DIR = 1, output when /OE low and DIR = 0, high-impedance when /OE high."
      },
      {
        "number": "19",
        "name": "/OE",
        "type": "input",
        "description": "Output enable input (active low); when low enables tri-state outputs, when high places A and B buses in high impedance."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Logic power supply; operates from 3.0 to 5.5 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 8,
        "cost_usd": 0.1917,
        "at": "2026-09-17T18:10:56"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590910725999583232",
        "pages": 8,
        "sha256": "8547b64d6a0bcdd9",
        "source_tier": "lcsc"
      },
      "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": "74hc245kaj.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": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hc245kaj-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": "5996521284c3bdea65946e52e272822000745f1ca0c80ac838d3c99250654272",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Shenzhen Fuman",
      "Package": "TSSOP-20",
      "Category": "Logic",
      "Pins": "20"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "74hc245kaj"
  ],
  "discovery_pitch": "74HC245KAJ (Shenzhen Fuman) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74hc245kaj.kicad_sym",
    "74hc245kaj.kicad_mod",
    "74hc245kaj.glb",
    "74hc245kaj.step",
    "74hc245kaj.lbr",
    "docs/hero.png",
    "docs/74hc245kaj-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T14:56:37.336Z"
}