74HCT4051D

{
  "slug": "74hct4051d",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Analog Switches, Multiplexers, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "74hct4051d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74hct4051d.kicad_sym",
    "74hct4051d.kicad_mod",
    "74hct4051d.glb",
    "74hct4051d.step",
    "74hct4051d.lbr",
    "docs/hero.png",
    "docs/74hct4051d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74hct4051d-hero.glb",
    "74hct4051d-hero.overlay.json",
    "74hct4051d-etched.glb"
  ],
  "component": {
    "mpn": "74HCT4051D",
    "manufacturer": "Nexperia",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Interface",
    "subcategory": "Analog Switches, Multiplexers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586192090077913088",
    "parts": {
      "symbol": "74hct4051d.kicad_sym",
      "footprint": "74hct4051d.kicad_mod",
      "model_3d": "74hct4051d-hero.glb",
      "model_3d_plain": "74hct4051d-etched.glb",
      "model_3d_step": "74hct4051d-etched.step",
      "model_3d_step_plain": "74hct4051d.step",
      "lbr": "74hct4051d.lbr"
    },
    "distributor_links": {
      "lcsc": "C87239",
      "mouser": "757-74HCT4051D"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T08:05:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "error"
      },
      "mouser": {
        "pn": "757-74HCT4051D",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Y4",
        "type": "bidirectional",
        "description": "Independent analog input/output of the switch; the voltage at Yn may not exceed VCC or VEE."
      },
      {
        "number": "2",
        "name": "Y6",
        "type": "bidirectional",
        "description": "Independent analog input/output of the switch; the voltage at Yn may not exceed VCC or VEE."
      },
      {
        "number": "3",
        "name": "Z",
        "type": "bidirectional",
        "description": "Common analog output or input of the switch; the voltage at Z may not exceed VCC or VEE."
      },
      {
        "number": "4",
        "name": "Y7",
        "type": "bidirectional",
        "description": "Independent analog input/output of the switch; the voltage at Yn may not exceed VCC or VEE."
      },
      {
        "number": "5",
        "name": "Y5",
        "type": "bidirectional",
        "description": "Independent analog input/output of the switch; the voltage at Yn may not exceed VCC or VEE."
      },
      {
        "number": "6",
        "name": "E",
        "type": "input",
        "description": "Digital enable input, active LOW; when E is HIGH all switches are turned off."
      },
      {
        "number": "7",
        "name": "VEE",
        "type": "power_in",
        "description": "Supply voltage pin for the analog switch; analog signals range from -5 V to +5 V and Yn/Z may not exceed VEE."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground supply pin; all voltages are referenced to VSS = 0 V (ground)."
      },
      {
        "number": "9",
        "name": "S2",
        "type": "input",
        "description": "Digital select input; S2, S1 and S0 together choose which Yn channel is connected to Z."
      },
      {
        "number": "10",
        "name": "S1",
        "type": "input",
        "description": "Digital select input; S2, S1 and S0 together choose which Yn channel is connected to Z."
      },
      {
        "number": "11",
        "name": "S0",
        "type": "input",
        "description": "Digital select input; S2, S1 and S0 together choose which Yn channel is connected to Z."
      },
      {
        "number": "12",
        "name": "Y3",
        "type": "bidirectional",
        "description": "Independent analog input/output of the switch; the voltage at Yn may not exceed VCC or VEE."
      },
      {
        "number": "13",
        "name": "Y0",
        "type": "bidirectional",
        "description": "Independent analog input/output of the switch; the voltage at Yn may not exceed VCC or VEE."
      },
      {
        "number": "14",
        "name": "Y1",
        "type": "bidirectional",
        "description": "Independent analog input/output of the switch; the voltage at Yn may not exceed VCC or VEE."
      },
      {
        "number": "15",
        "name": "Y2",
        "type": "bidirectional",
        "description": "Independent analog input/output of the switch; the voltage at Yn may not exceed VCC or VEE."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage; the absolute maximum VCC is -0.5 V to +11.0 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 74HCT4051D is sold in the SO16 'D' package (SOT109-1, body width 3.9 mm), which matches the SOIC; The pin type classes are my interpretation, not printed in the datasheet. Yn and Z are marked bidire; The VEE and GND descriptions combine the Table 2 role with statements from the limiting-values and a"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0566,
        "at": "2026-10-19T08:02:46"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586192090077913088",
        "pages": 28,
        "sha256": "e5b40e804e4dea04",
        "source_tier": "lcsc"
      },
      "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": "74hct4051d.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hct4051d-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d1daaee1a6a861634ee4fd758c3528ded3c06d75e509c8d642d9fe91a89801f5",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}