CD74HC4051E

{
  "slug": "cd74hc4051e",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Analog Switches, Multiplexers, PDIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "cd74hc4051e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cd74hc4051e.kicad_sym",
    "cd74hc4051e.kicad_mod",
    "cd74hc4051e.glb",
    "cd74hc4051e.step",
    "cd74hc4051e.lbr",
    "docs/hero.png",
    "docs/cd74hc4051e-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cd74hc4051e-hero.glb",
    "cd74hc4051e-hero.overlay.json",
    "cd74hc4051e-etched.glb"
  ],
  "component": {
    "mpn": "CD74HC4051E",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-16",
    "pin_count": 16,
    "category": "Interface",
    "subcategory": "Analog Switches, Multiplexers",
    "datasheet": "https://www.ti.com/cn/lit/ds/symlink/cd74hc4051.pdf",
    "parts": {
      "symbol": "cd74hc4051e.kicad_sym",
      "footprint": "cd74hc4051e.kicad_mod",
      "model_3d": "cd74hc4051e-hero.glb",
      "model_3d_plain": "cd74hc4051e-etched.glb",
      "model_3d_step": "cd74hc4051e-etched.step",
      "model_3d_step_plain": "cd74hc4051e.step",
      "lbr": "cd74hc4051e.lbr"
    },
    "distributor_links": {
      "lcsc": "C205976",
      "digikey": "296-12810-5-ND",
      "mouser": "595-CD74HC4051E"
    },
    "distributor_check": {
      "checked_at": "2026-10-14T12:53:01Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-12810-5-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-CD74HC4051E",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CH A4",
        "type": "bidirectional",
        "description": "Analog channel 4 input/output, connected to COM when E is low and S2=H, S1=L, S0=L."
      },
      {
        "number": "2",
        "name": "CH A6",
        "type": "bidirectional",
        "description": "Analog channel 6 input/output, connected to COM when E is low and S2=H, S1=H, S0=L."
      },
      {
        "number": "3",
        "name": "COM OUT/IN",
        "type": "bidirectional",
        "description": "Common analog output/input that connects to whichever channel is selected by S2, S1, S0 while E is low."
      },
      {
        "number": "4",
        "name": "CH A7",
        "type": "bidirectional",
        "description": "Analog channel 7 input/output, connected to COM when E is low and S2=H, S1=H, S0=H."
      },
      {
        "number": "5",
        "name": "CH A5",
        "type": "bidirectional",
        "description": "Analog channel 5 input/output, connected to COM when E is low and S2=H, S1=L, S0=H."
      },
      {
        "number": "6",
        "name": "E",
        "type": "input",
        "description": "Active-low enable input; when high it disables all switches into the off state."
      },
      {
        "number": "7",
        "name": "VEE",
        "type": "power_in",
        "description": "Negative power supply input; recommended range is 0 V to -6 V, and VCC - VEE must stay within 2 V to 10 V."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for all voltages on the device."
      },
      {
        "number": "9",
        "name": "S2",
        "type": "input",
        "description": "Channel select 2 binary address input (most significant bit) for choosing among channels 0 to 7."
      },
      {
        "number": "10",
        "name": "S1",
        "type": "input",
        "description": "Channel select 1 binary address input for choosing among channels 0 to 7."
      },
      {
        "number": "11",
        "name": "S0",
        "type": "input",
        "description": "Channel select 0 binary address input (least significant bit) for choosing among channels 0 to 7."
      },
      {
        "number": "12",
        "name": "CH A3",
        "type": "bidirectional",
        "description": "Analog channel 3 input/output, connected to COM when E is low and S2=L, S1=H, S0=H."
      },
      {
        "number": "13",
        "name": "CH A0",
        "type": "bidirectional",
        "description": "Analog channel 0 input/output, connected to COM when E is low and S2=L, S1=L, S0=L."
      },
      {
        "number": "14",
        "name": "CH A1",
        "type": "bidirectional",
        "description": "Analog channel 1 input/output, connected to COM when E is low and S2=L, S1=L, S0=H."
      },
      {
        "number": "15",
        "name": "CH A2",
        "type": "bidirectional",
        "description": "Analog channel 2 input/output, connected to COM when E is low and S2=L, S1=H, S0=L."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply input; recommended VCC is 2 V to 6 V for HC types (4.5 V to 5.5 V for HCT types)."
      }
    ],
    "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: Pin table (Table 4-1) is for the CDxHCx4051B family and the pin-function figure covers the J/N/D/NS/; Channel and COM pins are listed as I/O in the datasheet and mapped to KiCad 'bidirectional'; the dat; Enable pin is printed as '!E' in the text extraction and described as active-low (低电平有效) in Table 4-"
        ],
        "pages_sent": 22,
        "cost_usd": 0.1211,
        "at": "2026-10-14T12:52:42"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/ds/symlink/cd74hc4051.pdf",
        "pages": 50,
        "sha256": "cc5bd993625a4388",
        "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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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.177,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "17a30b1f0ab3fd5384a1231e3c63c394888d5b952c542a8c189e023ed3467464",
        "checked": "2026-10-14",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "1f0436d942718849db802d66835ce1e810b2bd7c8c6dcd5dfbb13bfefa9968cf",
        "checked": "2026-10-14",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}