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Ray Set visibility: public da85279 4h ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "u74hct245g",
  "title": "U74HCT245G",
  "brief": "UTC Unisonic Tech Logic Gates, 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": [
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    "logic",
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    "extractor-text"
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  "component": {
    "mpn": "U74HCT245G",
    "manufacturer": "UTC Unisonic Tech",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Logic Gates",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602995877329838080",
    "parts": {
      "symbol": "u74hct245g.kicad_sym",
      "footprint": "u74hct245g.kicad_mod",
      "model_3d": "u74hct245g-hero.glb",
      "model_3d_plain": "u74hct245g-etched.glb",
      "model_3d_step": "u74hct245g-etched.step",
      "model_3d_step_plain": "u74hct245g.step",
      "lbr": "u74hct245g.lbr"
    },
    "distributor_links": {
      "lcsc": "C7494911"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T15:07:11Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "DIR",
        "type": "input",
        "description": "Direction control: high transmits data from the A bus to the B bus, low transmits from B bus to A bus."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "bidirectional",
        "description": "A-bus data I/O 1, TTL-compatible input with 3-state output."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "bidirectional",
        "description": "A-bus data I/O 2, TTL-compatible input with 3-state output."
      },
      {
        "number": "4",
        "name": "A3",
        "type": "bidirectional",
        "description": "A-bus data I/O 3, TTL-compatible input with 3-state output."
      },
      {
        "number": "5",
        "name": "A4",
        "type": "bidirectional",
        "description": "A-bus data I/O 4, TTL-compatible input with 3-state output."
      },
      {
        "number": "6",
        "name": "A5",
        "type": "bidirectional",
        "description": "A-bus data I/O 5, TTL-compatible input with 3-state output."
      },
      {
        "number": "7",
        "name": "A6",
        "type": "bidirectional",
        "description": "A-bus data I/O 6, TTL-compatible input with 3-state output."
      },
      {
        "number": "8",
        "name": "A7",
        "type": "bidirectional",
        "description": "A-bus data I/O 7, TTL-compatible input with 3-state output."
      },
      {
        "number": "9",
        "name": "A8",
        "type": "bidirectional",
        "description": "A-bus data I/O 8, TTL-compatible input with 3-state output."
      },
      {
        "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, TTL-compatible input with 3-state output."
      },
      {
        "number": "12",
        "name": "B7",
        "type": "bidirectional",
        "description": "B-bus data I/O 7, TTL-compatible input with 3-state output."
      },
      {
        "number": "13",
        "name": "B6",
        "type": "bidirectional",
        "description": "B-bus data I/O 6, TTL-compatible input with 3-state output."
      },
      {
        "number": "14",
        "name": "B5",
        "type": "bidirectional",
        "description": "B-bus data I/O 5, TTL-compatible input with 3-state output."
      },
      {
        "number": "15",
        "name": "B4",
        "type": "bidirectional",
        "description": "B-bus data I/O 4, TTL-compatible input with 3-state output."
      },
      {
        "number": "16",
        "name": "B3",
        "type": "bidirectional",
        "description": "B-bus data I/O 3, TTL-compatible input with 3-state output."
      },
      {
        "number": "17",
        "name": "B2",
        "type": "bidirectional",
        "description": "B-bus data I/O 2, TTL-compatible input with 3-state output."
      },
      {
        "number": "18",
        "name": "B1",
        "type": "bidirectional",
        "description": "B-bus data I/O 1, TTL-compatible input with 3-state output."
      },
      {
        "number": "19",
        "name": "OE",
        "type": "input",
        "description": "Active-low output enable: high isolates the device from the buses."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, recommended 4.5V to 5.5V (absolute maximum 7.0V)."
      }
    ],
    "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": [
          "extractor flagged: The datasheet has a single pin configuration drawing shared by DIP-20, SOP-20, SSOP-20 and TSSOP-20.",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 5,
        "cost_usd": 0.2335,
        "at": "2026-10-17T15:05:51"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602995877329838080",
        "pages": 5,
        "sha256": "def9debb908d308d",
        "source_tier": "lcsc"
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      "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"
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "u74hct245g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "UTC Unisonic Tech",
      "Package": "TSSOP-20",
      "Category": "Logic",
      "Pins": "20"
    },
    "characteristics": {
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      "source": "datasheet",
      "datasheet_sha256": "def9debb908d308dae478741703d2a09143095e43b0cd61ee572a9fd3b1d5d31",
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          "max": 5.5,
          "conditions": "",
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        },
        {
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          "kind": "recommended_operating",
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        {
          "name": "Output Voltage",
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        {
          "name": "Ambient Operating Temperature",
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          "unit": "mA",
          "min": -20,
          "typ": null,
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          "conditions": "VIN<0",
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        {
          "name": "Output Clamp Current",
          "symbol": "IOK",
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          "unit": "mA",
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          "typ": null,
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          "conditions": "",
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        },
        {
          "name": "VCC or GND Current",
          "symbol": "ICC",
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          "unit": "mA",
          "min": -70,
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        },
        {
          "name": "Storage Temperature",
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          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
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        {
          "name": "High-Level input voltage",
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          "min": 2,
          "typ": null,
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          "conditions": "VCC=4.5V~5.5V",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Low-Level input voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
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          "conditions": "VCC=4.5V~5.5V",
          "source_page": 3,
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          "max": 0.1,
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          "source_page": 3,
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          "conditions": "VCC=4.5V, IOL=6mA",
          "source_page": 3,
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        {
          "name": "Input Current of DIR or OE",
          "symbol": "II(LEAK)",
          "kind": "electrical",
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          "min": -100,
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          "max": 100,
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          "name": "Output OFF-state current",
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          "conditions": "VCC=5.5V, VOUT=VCC or GND",
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          "name": "Additional Quiescent Supply Current",
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          "conditions": "VCC=5.5V, One input at 0.5V or 2.4V, other inputs at 0 or VCC",
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        {
          "name": "Input Capacitance of DIR or OE",
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          "kind": "electrical",
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          "min": null,
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          "max": 10,
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          "name": "3-state output enable time from OE to output (A or B), CL=50pF",
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