SN74LVC257APWR

{
  "slug": "sn74lvc257apwr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "sn74lvc257apwr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
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    "sn74lvc257apwr.step",
    "sn74lvc257apwr.lbr",
    "docs/hero.png",
    "docs/sn74lvc257apwr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
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  "component": {
    "mpn": "SN74LVC257APWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74lvc257a.pdf",
    "parts": {
      "symbol": "sn74lvc257apwr.kicad_sym",
      "footprint": "sn74lvc257apwr.kicad_mod",
      "model_3d": "sn74lvc257apwr-etched.glb",
      "model_3d_plain": "sn74lvc257apwr.glb",
      "model_3d_step": "sn74lvc257apwr-etched.step",
      "model_3d_step_plain": "sn74lvc257apwr.step",
      "lbr": "sn74lvc257apwr.lbr"
    },
    "distributor_links": {
      "lcsc": "C205921"
    },
    "pins": [
      {
        "number": "1",
        "name": "A/B",
        "type": "input",
        "description": "Select input; low selects channel A data, high selects channel B data; rated for 0 to VCC logic levels."
      },
      {
        "number": "2",
        "name": "1A",
        "type": "input",
        "description": "Multiplexer input A for output 1Y; accepts input signals from 0 to 5.5 V; input impedance 5 pF."
      },
      {
        "number": "3",
        "name": "1B",
        "type": "input",
        "description": "Multiplexer input B for output 1Y; accepts input signals from 0 to 5.5 V; input impedance 5 pF."
      },
      {
        "number": "4",
        "name": "1Y",
        "type": "tri_state",
        "description": "Tri-state multiplexer output for channel 1; VOH ≥ VCC − 0.2 V at IOH = −100 μA, VOL ≤ 0.2 V at IOL = 100 μA."
      },
      {
        "number": "5",
        "name": "2A",
        "type": "input",
        "description": "Multiplexer input A for output 2Y; accepts input signals from 0 to 5.5 V; input impedance 5 pF."
      },
      {
        "number": "6",
        "name": "2B",
        "type": "input",
        "description": "Multiplexer input B for output 2Y; accepts input signals from 0 to 5.5 V; input impedance 5 pF."
      },
      {
        "number": "7",
        "name": "2Y",
        "type": "tri_state",
        "description": "Tri-state multiplexer output for channel 2; VOH ≥ VCC − 0.2 V at IOH = −100 μA, VOL ≤ 0.2 V at IOL = 100 μA."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference; return path for all device currents."
      },
      {
        "number": "9",
        "name": "3Y",
        "type": "tri_state",
        "description": "Tri-state multiplexer output for channel 3; VOH ≥ VCC − 0.2 V at IOH = −100 μA, VOL ≤ 0.2 V at IOL = 100 μA."
      },
      {
        "number": "10",
        "name": "3B",
        "type": "input",
        "description": "Multiplexer input B for output 3Y; accepts input signals from 0 to 5.5 V; input impedance 5 pF."
      },
      {
        "number": "11",
        "name": "3A",
        "type": "input",
        "description": "Multiplexer input A for output 3Y; accepts input signals from 0 to 5.5 V; input impedance 5 pF."
      },
      {
        "number": "12",
        "name": "4Y",
        "type": "tri_state",
        "description": "Tri-state multiplexer output for channel 4; VOH ≥ VCC − 0.2 V at IOH = −100 μA, VOL ≤ 0.2 V at IOL = 100 μA."
      },
      {
        "number": "13",
        "name": "4B",
        "type": "input",
        "description": "Multiplexer input B for output 4Y; accepts input signals from 0 to 5.5 V; input impedance 5 pF."
      },
      {
        "number": "14",
        "name": "4A",
        "type": "input",
        "description": "Multiplexer input A for output 4Y; accepts input signals from 0 to 5.5 V; input impedance 5 pF."
      },
      {
        "number": "15",
        "name": "OE",
        "type": "input",
        "description": "Active-low output enable; when high, all Y outputs enter tri-state; when low, outputs driven; 0 to VCC logic levels."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply voltage; operating range 1.65 V to 3.6 V; add 0.1 μF bypass capacitor per pin."
      }
    ],
    "provenance": {
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        "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": 39,
        "cost_usd": 0.3039,
        "at": "2026-09-17T23:22:45"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74lvc257a.pdf",
        "pages": 39,
        "sha256": "79a39fc53062a5a3",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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      "footprint": "viewers/footprint.html"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
        "checked": "2026-10-07",
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        "checked": "2026-10-19",
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}