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Ray Set visibility: public 645efac 20d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74ahc540dwr",
  "title": "SN74AHC540DWR",
  "brief": "Texas Instruments Buffer/Driver/Transceiver, SOIC-20-300mil. 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 ics",
    "sn74ahc540dwr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SN74AHC540DWR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-20-300mil",
    "pin_count": 20,
    "category": "Logic ICs",
    "subcategory": "Buffer/Driver/Transceiver",
    "datasheet": "https://www.ti.com/cn/lit/gpn/sn74ahc540",
    "parts": {
      "symbol": "sn74ahc540dwr.kicad_sym",
      "footprint": "sn74ahc540dwr.kicad_mod",
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      "model_3d_plain": "sn74ahc540dwr.glb",
      "model_3d_step": "sn74ahc540dwr-etched.step",
      "model_3d_step_plain": "sn74ahc540dwr.step",
      "lbr": "sn74ahc540dwr.lbr"
    },
    "distributor_links": {
      "lcsc": "C527545",
      "digikey": "296-4605-2-ND",
      "mouser": "595-SN74AHC540DWR"
    },
    "distributor_check": {
      "checked_at": "2026-10-10T20:15:23Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-4605-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-SN74AHC540DWR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OE1",
        "type": "input",
        "description": "Output Enable 1 input for the first group of buffer channels; the active level is not stated in the provided pages, and all unused inputs must be held at VCC or GND."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "A1 data input to buffer channel 1; input voltage must stay within 0 V to 5.5 V."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "A2 data input to buffer channel 2; input voltage must stay within 0 V to 5.5 V."
      },
      {
        "number": "4",
        "name": "A3",
        "type": "input",
        "description": "A3 data input to buffer channel 3; input voltage must stay within 0 V to 5.5 V."
      },
      {
        "number": "5",
        "name": "A4",
        "type": "input",
        "description": "A4 data input to buffer channel 4; input voltage must stay within 0 V to 5.5 V."
      },
      {
        "number": "6",
        "name": "A5",
        "type": "input",
        "description": "A5 data input to buffer channel 5; input voltage must stay within 0 V to 5.5 V."
      },
      {
        "number": "7",
        "name": "A6",
        "type": "input",
        "description": "A6 data input to buffer channel 6; input voltage must stay within 0 V to 5.5 V."
      },
      {
        "number": "8",
        "name": "A7",
        "type": "input",
        "description": "A7 data input to buffer channel 7; input voltage must stay within 0 V to 5.5 V."
      },
      {
        "number": "9",
        "name": "A8",
        "type": "input",
        "description": "A8 data input to buffer channel 8; input voltage must stay within 0 V to 5.5 V."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the device."
      },
      {
        "number": "11",
        "name": "Y8",
        "type": "tri_state",
        "description": "Three-state output of buffer channel 8; output voltage is limited to 0 V to VCC and continuous output current to ±25 mA (absolute maximum)."
      },
      {
        "number": "12",
        "name": "Y7",
        "type": "tri_state",
        "description": "Three-state output of buffer channel 7; output voltage is limited to 0 V to VCC and continuous output current to ±25 mA (absolute maximum)."
      },
      {
        "number": "13",
        "name": "Y6",
        "type": "tri_state",
        "description": "Three-state output of buffer channel 6; output voltage is limited to 0 V to VCC and continuous output current to ±25 mA (absolute maximum)."
      },
      {
        "number": "14",
        "name": "Y5",
        "type": "tri_state",
        "description": "Three-state output of buffer channel 5; output voltage is limited to 0 V to VCC and continuous output current to ±25 mA (absolute maximum)."
      },
      {
        "number": "15",
        "name": "Y4",
        "type": "tri_state",
        "description": "Three-state output of buffer channel 4; output voltage is limited to 0 V to VCC and continuous output current to ±25 mA (absolute maximum)."
      },
      {
        "number": "16",
        "name": "Y3",
        "type": "tri_state",
        "description": "Three-state output of buffer channel 3; output voltage is limited to 0 V to VCC and continuous output current to ±25 mA (absolute maximum)."
      },
      {
        "number": "17",
        "name": "Y2",
        "type": "tri_state",
        "description": "Three-state output of buffer channel 2; output voltage is limited to 0 V to VCC and continuous output current to ±25 mA (absolute maximum)."
      },
      {
        "number": "18",
        "name": "Y1",
        "type": "tri_state",
        "description": "Three-state output of buffer channel 1; output voltage is limited to 0 V to VCC and continuous output current to ±25 mA (absolute maximum)."
      },
      {
        "number": "19",
        "name": "OE2",
        "type": "input",
        "description": "Output Enable 2 input for the second group of buffer channels; the active level is not stated in the provided pages, and all unused inputs must be held at VCC or GND."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply pin; the recommended supply range is 2 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 pin table gives only the names 'Output Enable 1' and 'Output Enable 2'. The active level of OE1/; The pin table lists these outputs as 'O'. The datasheet title describes the device as having three-s; The pin table gives only 'A<n> Input' for these pins. The descriptions use the device-wide input vol"
        ],
        "pages_sent": 8,
        "cost_usd": 0.0468,
        "at": "2026-10-10T20:15:05"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/sn74ahc540",
        "pages": 39,
        "sha256": "968d034cf8044230",
        "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": [
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        "file": "sn74ahc540dwr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "59a10b341e6972b31d81802a048060326da627d8b92dcf4263064f4f62ec808e",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74ahc540dwr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "016f38d6ed7c50786a93f02def21208c705ff27e5a63997caa9dccb44855ea8b",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-20-300mil",
      "Category": "Logic ICs",
      "Pins": "20"
    }
  },
  "variants": [],
  "sections": [
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  "discovery_triggers": [
    "sn74ahc540dwr"
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  "discovery_pitch": "SN74AHC540DWR (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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}