74LCX257FT

{
  "slug": "74lcx257ft",
  "version": "0.1.0",
  "type": "component",
  "description": "TOSHIBA Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74lcx257ft",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74lcx257ft.kicad_sym",
    "74lcx257ft.kicad_mod",
    "74lcx257ft.glb",
    "74lcx257ft.step",
    "74lcx257ft.lbr",
    "docs/hero.png",
    "docs/74lcx257ft-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74lcx257ft-hero.glb",
    "74lcx257ft-hero.overlay.json",
    "74lcx257ft-etched.glb"
  ],
  "component": {
    "mpn": "74LCX257FT",
    "manufacturer": "TOSHIBA",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/b3393fb8a7291d00a15ea27f0eedd087.pdf",
    "parts": {
      "symbol": "74lcx257ft.kicad_sym",
      "footprint": "74lcx257ft.kicad_mod",
      "model_3d": "74lcx257ft-hero.glb",
      "model_3d_plain": "74lcx257ft-etched.glb",
      "model_3d_step": "74lcx257ft-etched.step",
      "model_3d_step_plain": "74lcx257ft.step",
      "lbr": "74lcx257ft.lbr"
    },
    "distributor_links": {
      "lcsc": "C2674461",
      "digikey": "74LCX257FTTR-ND",
      "mouser": "757-74LCX257FT"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T04:57:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "74LCX257FTTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "757-74LCX257FT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SELECT",
        "type": "input",
        "description": "Common select input: low enables the A data inputs, high enables the B data inputs."
      },
      {
        "number": "2",
        "name": "1A",
        "type": "input",
        "description": "Channel 1 data input A, routed to 1Y when SELECT is low; 5-V tolerant."
      },
      {
        "number": "3",
        "name": "1B",
        "type": "input",
        "description": "Channel 1 data input B, routed to 1Y when SELECT is high; 5-V tolerant."
      },
      {
        "number": "4",
        "name": "1Y",
        "type": "tri_state",
        "description": "Channel 1 3-state output, high impedance when OE is high; |IOH|/IOL 24 mA min at VCC = 3.0 V."
      },
      {
        "number": "5",
        "name": "2A",
        "type": "input",
        "description": "Channel 2 data input A, routed to 2Y when SELECT is low; 5-V tolerant."
      },
      {
        "number": "6",
        "name": "2B",
        "type": "input",
        "description": "Channel 2 data input B, routed to 2Y when SELECT is high; 5-V tolerant."
      },
      {
        "number": "7",
        "name": "2Y",
        "type": "tri_state",
        "description": "Channel 2 3-state output, high impedance when OE is high; |IOH|/IOL 24 mA min at VCC = 3.0 V."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) supply pin."
      },
      {
        "number": "9",
        "name": "3Y",
        "type": "tri_state",
        "description": "Channel 3 3-state output, high impedance when OE is high; |IOH|/IOL 24 mA min at VCC = 3.0 V."
      },
      {
        "number": "10",
        "name": "3B",
        "type": "input",
        "description": "Channel 3 data input B, routed to 3Y when SELECT is high; 5-V tolerant."
      },
      {
        "number": "11",
        "name": "3A",
        "type": "input",
        "description": "Channel 3 data input A, routed to 3Y when SELECT is low; 5-V tolerant."
      },
      {
        "number": "12",
        "name": "4Y",
        "type": "tri_state",
        "description": "Channel 4 3-state output, high impedance when OE is high; |IOH|/IOL 24 mA min at VCC = 3.0 V."
      },
      {
        "number": "13",
        "name": "4B",
        "type": "input",
        "description": "Channel 4 data input B, routed to 4Y when SELECT is high; 5-V tolerant."
      },
      {
        "number": "14",
        "name": "4A",
        "type": "input",
        "description": "Channel 4 data input A, routed to 4Y when SELECT is low; 5-V tolerant."
      },
      {
        "number": "15",
        "name": "OE",
        "type": "input",
        "description": "Active-low output enable; when high the outputs are held in high impedance."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, operating range 1.65 to 3.6 V (absolute maximum -0.5 to 6.5 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": 11,
        "cost_usd": 0.2856,
        "at": "2026-10-18T04:53:24"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/b3393fb8a7291d00a15ea27f0eedd087.pdf",
        "pages": 11,
        "sha256": "1d247549b87461cf",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "74lcx257ft.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74lcx257ft-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          1.1
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "0740929bd201663bd91af01e85e2f0b11ded4d5086d879ed9d3f806951098d44",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}