74AHC157D

{
  "slug": "74ahc157d",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Signal Switches, Multiplexers, Decoders, SO-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74ahc157d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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    "README.md",
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    "74ahc157d.step",
    "74ahc157d.lbr",
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    "docs/74ahc157d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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    "74ahc157d-hero.overlay.json",
    "74ahc157d-etched.glb"
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  "component": {
    "mpn": "74AHC157D",
    "manufacturer": "Nexperia",
    "package": "SO-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588923699042508800",
    "parts": {
      "symbol": "74ahc157d.kicad_sym",
      "footprint": "74ahc157d.kicad_mod",
      "model_3d": "74ahc157d-hero.glb",
      "model_3d_plain": "74ahc157d-etched.glb",
      "model_3d_step": "74ahc157d-etched.step",
      "model_3d_step_plain": "74ahc157d.step",
      "lbr": "74ahc157d.lbr"
    },
    "distributor_links": {
      "lcsc": "C2442288",
      "mouser": "771-74AHC157D"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T04:09:06Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": "771-74AHC157D",
        "status": "found",
        "lifecycle": "End of Life"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "S",
        "type": "input",
        "description": "Common data select input that chooses the nI0 data inputs when LOW and the nI1 data inputs when HIGH."
      },
      {
        "number": "2",
        "name": "1I0",
        "type": "input",
        "description": "Data input from source 0 for multiplexer channel 1, selected when S is LOW; recommended input voltage range is 0 V to 5.5 V."
      },
      {
        "number": "3",
        "name": "1I1",
        "type": "input",
        "description": "Data input from source 1 for multiplexer channel 1, selected when S is HIGH; recommended input voltage range is 0 V to 5.5 V."
      },
      {
        "number": "4",
        "name": "1Y",
        "type": "output",
        "description": "Multiplexer output for channel 1, forced LOW when the enable input E is HIGH."
      },
      {
        "number": "5",
        "name": "2I0",
        "type": "input",
        "description": "Data input from source 0 for multiplexer channel 2, selected when S is LOW; recommended input voltage range is 0 V to 5.5 V."
      },
      {
        "number": "6",
        "name": "2I1",
        "type": "input",
        "description": "Data input from source 1 for multiplexer channel 2, selected when S is HIGH; recommended input voltage range is 0 V to 5.5 V."
      },
      {
        "number": "7",
        "name": "2Y",
        "type": "output",
        "description": "Multiplexer output for channel 2, forced LOW when the enable input E is HIGH."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for all device voltages."
      },
      {
        "number": "9",
        "name": "3Y",
        "type": "output",
        "description": "Multiplexer output for channel 3, forced LOW when the enable input E is HIGH."
      },
      {
        "number": "10",
        "name": "3I1",
        "type": "input",
        "description": "Data input from source 1 for multiplexer channel 3, selected when S is HIGH; recommended input voltage range is 0 V to 5.5 V."
      },
      {
        "number": "11",
        "name": "3I0",
        "type": "input",
        "description": "Data input from source 0 for multiplexer channel 3, selected when S is LOW; recommended input voltage range is 0 V to 5.5 V."
      },
      {
        "number": "12",
        "name": "4Y",
        "type": "output",
        "description": "Multiplexer output for channel 4, forced LOW when the enable input E is HIGH."
      },
      {
        "number": "13",
        "name": "4I1",
        "type": "input",
        "description": "Data input from source 1 for multiplexer channel 4, selected when S is HIGH; recommended input voltage range is 0 V to 5.5 V."
      },
      {
        "number": "14",
        "name": "4I0",
        "type": "input",
        "description": "Data input from source 0 for multiplexer channel 4, selected when S is LOW; recommended input voltage range is 0 V to 5.5 V."
      },
      {
        "number": "15",
        "name": "E",
        "type": "input",
        "description": "Enable input, active LOW; when HIGH all outputs 1Y to 4Y are forced LOW regardless of other inputs."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; recommended range is 2.0 V to 5.5 V for 74AHC157 and 4.5 V to 5.5 V for 74AHCT157."
      }
    ],
    "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 datasheet's Table 2 gives pin numbers per signal group (e.g. nI0 = 2, 5, 11, 14). The individual; The datasheet covers both 74AHC157 and 74AHCT157 with the same pinout. The MPN 74AHC157D is the 74AH"
        ],
        "pages_sent": 16,
        "cost_usd": 0.0715,
        "at": "2026-10-19T04:08:51"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588923699042508800",
        "pages": 16,
        "sha256": "7a0db500324c30a7",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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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,
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        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74ahc157d-etched.step",
        "role": "eda",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
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        "sha256": "a8739679e2bf5ab4f9ef3a6cba3f27b7894fe35bd791c8610bac0a0936d82687",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}