SN74AHC245DBR

{
  "slug": "sn74ahc245dbr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Logic ICs, SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic ics",
    "sn74ahc245dbr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "sn74ahc245dbr.kicad_sym",
    "sn74ahc245dbr.kicad_mod",
    "sn74ahc245dbr.glb",
    "sn74ahc245dbr.step",
    "sn74ahc245dbr.lbr",
    "docs/hero.png",
    "docs/sn74ahc245dbr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74ahc245dbr-hero.glb",
    "sn74ahc245dbr-hero.overlay.json",
    "sn74ahc245dbr-etched.glb"
  ],
  "component": {
    "mpn": "SN74AHC245DBR",
    "manufacturer": "Texas Instruments",
    "package": "SSOP-20-208mil",
    "pin_count": 20,
    "category": "Logic ICs",
    "subcategory": "Logic ICs",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74ahc245dbr.pdf",
    "parts": {
      "symbol": "sn74ahc245dbr.kicad_sym",
      "footprint": "sn74ahc245dbr.kicad_mod",
      "model_3d": "sn74ahc245dbr-hero.glb",
      "model_3d_plain": "sn74ahc245dbr-etched.glb",
      "model_3d_step": "sn74ahc245dbr-etched.step",
      "model_3d_step_plain": "sn74ahc245dbr.step",
      "lbr": "sn74ahc245dbr.lbr"
    },
    "distributor_links": {
      "lcsc": "C125811",
      "digikey": "296-4586-2-ND",
      "mouser": "595-SN74AHC245DBR"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T06:26:21Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-4586-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-SN74AHC245DBR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "DIR",
        "type": "input",
        "description": "Direction control pin of the octal bus transceiver; the datasheet gives only the pin name and does not state its logic-level mapping."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "bidirectional",
        "description": "Bidirectional A-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "bidirectional",
        "description": "Bidirectional A-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "4",
        "name": "A3",
        "type": "bidirectional",
        "description": "Bidirectional A-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "5",
        "name": "A4",
        "type": "bidirectional",
        "description": "Bidirectional A-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "6",
        "name": "A5",
        "type": "bidirectional",
        "description": "Bidirectional A-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "7",
        "name": "A6",
        "type": "bidirectional",
        "description": "Bidirectional A-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "8",
        "name": "A7",
        "type": "bidirectional",
        "description": "Bidirectional A-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "9",
        "name": "A8",
        "type": "bidirectional",
        "description": "Bidirectional A-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the device."
      },
      {
        "number": "11",
        "name": "B8",
        "type": "bidirectional",
        "description": "Bidirectional B-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "12",
        "name": "B7",
        "type": "bidirectional",
        "description": "Bidirectional B-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "13",
        "name": "B6",
        "type": "bidirectional",
        "description": "Bidirectional B-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "14",
        "name": "B5",
        "type": "bidirectional",
        "description": "Bidirectional B-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "15",
        "name": "B4",
        "type": "bidirectional",
        "description": "Bidirectional B-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "16",
        "name": "B3",
        "type": "bidirectional",
        "description": "Bidirectional B-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "17",
        "name": "B2",
        "type": "bidirectional",
        "description": "Bidirectional B-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "18",
        "name": "B1",
        "type": "bidirectional",
        "description": "Bidirectional B-bus data input/output of the octal transceiver, used in the asynchronous two-way path between the A and B buses."
      },
      {
        "number": "19",
        "name": "OE",
        "type": "input",
        "description": "Output enable control pin of the device; the datasheet gives only the pin name and does not state its active level in the provided text."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply pin; the datasheet states the device operates from 4.5 V to 5.5 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 page 3 pin table is garbled in the text extraction. The NAME column has wrong entries at pins 16; The datasheet does not state the DIR logic-level mapping or the active level of OE in the provided t; The '208mil' width in the package hint is not stated in the provided text. The text gives the DB (SS"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0591,
        "at": "2026-10-18T06:22:33"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74ahc245dbr.pdf",
        "pages": 32,
        "sha256": "2e0da200efe77de1",
        "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": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          7.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9a01a276d0b4d9561efd58f2fcee56f52c1b6ab464ea7a0380cab4e87a924e6",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74ahc245dbr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0.0,
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        "sha256": "e8c821a2986dfb5c4f54cd3cf7ddcf7701a00645fce9970ba59646c9a85c848c",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}