74VHC157MTCX

{
  "slug": "74vhc157mtcx",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74vhc157mtcx",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74vhc157mtcx.kicad_sym",
    "74vhc157mtcx.kicad_mod",
    "74vhc157mtcx.glb",
    "74vhc157mtcx.step",
    "74vhc157mtcx.lbr",
    "docs/hero.png",
    "docs/74vhc157mtcx-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74vhc157mtcx-hero.glb",
    "74vhc157mtcx-hero.overlay.json",
    "74vhc157mtcx-etched.glb"
  ],
  "component": {
    "mpn": "74VHC157MTCX",
    "manufacturer": "onsemi",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/74vhc157mtcx-d.pdf",
    "parts": {
      "symbol": "74vhc157mtcx.kicad_sym",
      "footprint": "74vhc157mtcx.kicad_mod",
      "model_3d": "74vhc157mtcx-hero.glb",
      "model_3d_plain": "74vhc157mtcx-etched.glb",
      "model_3d_step": "74vhc157mtcx-etched.step",
      "model_3d_step_plain": "74vhc157mtcx.step",
      "lbr": "74vhc157mtcx.lbr"
    },
    "distributor_links": {
      "lcsc": "C903417",
      "digikey": "74VHC157MTCXTR-ND",
      "mouser": "512-74VHC157MTCX"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T18:10:35Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "74VHC157MTCXTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "512-74VHC157MTCX",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "S",
        "type": "input",
        "description": "Common Select input that determines whether the I0x or I1x inputs are routed to the outputs; must be held HIGH or LOW, not floating, and tolerates 0V to 5.5V."
      },
      {
        "number": "2",
        "name": "I0a",
        "type": "input",
        "description": "Source 0 data input for channel a, routed to Za when S is LOW and E is LOW."
      },
      {
        "number": "3",
        "name": "I1a",
        "type": "input",
        "description": "Source 1 data input for channel a, routed to Za when S is HIGH and E is LOW."
      },
      {
        "number": "4",
        "name": "Za",
        "type": "output",
        "description": "Channel a multiplexer output, forced LOW when E is HIGH."
      },
      {
        "number": "5",
        "name": "I0b",
        "type": "input",
        "description": "Source 0 data input for channel b, routed to Zb when S is LOW and E is LOW."
      },
      {
        "number": "6",
        "name": "I1b",
        "type": "input",
        "description": "Source 1 data input for channel b, routed to Zb when S is HIGH and E is LOW."
      },
      {
        "number": "7",
        "name": "Zb",
        "type": "output",
        "description": "Channel b multiplexer output, forced LOW when E is HIGH."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin (0V reference)."
      },
      {
        "number": "9",
        "name": "Zd",
        "type": "output",
        "description": "Channel d multiplexer output, forced LOW when E is HIGH."
      },
      {
        "number": "10",
        "name": "I1d",
        "type": "input",
        "description": "Source 1 data input for channel d, routed to Zd when S is HIGH and E is LOW."
      },
      {
        "number": "11",
        "name": "I0d",
        "type": "input",
        "description": "Source 0 data input for channel d, routed to Zd when S is LOW and E is LOW."
      },
      {
        "number": "12",
        "name": "Zc",
        "type": "output",
        "description": "Channel c multiplexer output, forced LOW when E is HIGH."
      },
      {
        "number": "13",
        "name": "I1c",
        "type": "input",
        "description": "Source 1 data input for channel c, routed to Zc when S is HIGH and E is LOW."
      },
      {
        "number": "14",
        "name": "I0c",
        "type": "input",
        "description": "Source 0 data input for channel c, routed to Zc when S is LOW and E is LOW."
      },
      {
        "number": "15",
        "name": "E",
        "type": "input",
        "description": "Active-LOW Enable input; when HIGH all outputs are forced LOW regardless of other inputs."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage, recommended 2.0V 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 ordering table lists 74VHC157MTC (MTC16, TSSOP-16); the requested MPN 74VHC157MTCX is its tape-a",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 12,
        "cost_usd": 0.3152,
        "at": "2026-10-21T18:06:16"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/74vhc157mtcx-d.pdf",
        "pages": 12,
        "sha256": "d4b55972ef61511e",
        "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": "74vhc157mtcx.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": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74vhc157mtcx-etched.step",
        "role": "eda",
        "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": "d8c8dec9e802426331f700d9319fe577eaf2c432e780b98c5bfd623df4065549",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}