CD74HC4066

{
  "schema_version": 1,
  "type": "component",
  "slug": "cd74hc4066",
  "title": "CD74HC4066",
  "brief": "TI quad bilateral (analog) switch, SOIC-14. Four SPST switches, low on-resistance, 2-6 V. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "analog-switch",
    "bilateral-switch",
    "transmission-gate",
    "4066",
    "soic-14",
    "texas-instruments"
  ],
  "component": {
    "mpn": "CD74HC4066",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-14",
    "pin_count": 14,
    "category": "Multiplexer",
    "subcategory": "Quad bilateral analog switch",
    "datasheet": "https://www.ti.com/lit/ds/symlink/cd74hc4066.pdf",
    "parts": {
      "symbol": "cd74hc4066.kicad_sym",
      "footprint": "cd74hc4066.kicad_mod",
      "model_3d": "cd74hc4066-etched.glb",
      "model_3d_plain": "cd74hc4066.glb",
      "lbr": "cd74hc4066.lbr",
      "model_3d_step": "cd74hc4066-etched.step",
      "model_3d_step_plain": "cd74hc4066.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "1Y",
        "type": "bidirectional",
        "description": "Switch 1 analog I/O terminal (Y side). Bidirectional analog signal path connected internally to 1Z when 1E is high. Handles analog voltages between GND and Vcc."
      },
      {
        "number": "2",
        "name": "1Z",
        "type": "bidirectional",
        "description": "Switch 1 analog I/O terminal (Z side). Bidirectional analog signal path connected internally to 1Y when 1E is high."
      },
      {
        "number": "3",
        "name": "2Z",
        "type": "bidirectional",
        "description": "Switch 2 analog I/O terminal (Z side). Bidirectional analog signal path connected internally to 2Y when 2E is high."
      },
      {
        "number": "4",
        "name": "2Y",
        "type": "bidirectional",
        "description": "Switch 2 analog I/O terminal (Y side). Bidirectional analog signal path connected internally to 2Z when 2E is high."
      },
      {
        "number": "5",
        "name": "2E",
        "type": "input",
        "description": "Switch 2 enable/control input. High level (>= VIH) closes the switch between 2Y and 2Z; low level opens it. CMOS logic input referenced to VCC/GND."
      },
      {
        "number": "6",
        "name": "3E",
        "type": "input",
        "description": "Switch 3 enable/control input. High level (>= VIH) closes the switch between 3Y and 3Z; low level opens it. CMOS logic input referenced to VCC/GND."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V). Return current path for the device supply and lower bound of the recommended analog signal range."
      },
      {
        "number": "8",
        "name": "3Y",
        "type": "bidirectional",
        "description": "Switch 3 analog I/O terminal (Y side). Bidirectional analog signal path connected internally to 3Z when 3E is high."
      },
      {
        "number": "9",
        "name": "3Z",
        "type": "bidirectional",
        "description": "Switch 3 analog I/O terminal (Z side). Bidirectional analog signal path connected internally to 3Y when 3E is high."
      },
      {
        "number": "10",
        "name": "4Z",
        "type": "bidirectional",
        "description": "Switch 4 analog I/O terminal (Z side). Bidirectional analog signal path connected internally to 4Y when 4E is high."
      },
      {
        "number": "11",
        "name": "4Y",
        "type": "bidirectional",
        "description": "Switch 4 analog I/O terminal (Y side). Bidirectional analog signal path connected internally to 4Z when 4E is high."
      },
      {
        "number": "12",
        "name": "4E",
        "type": "input",
        "description": "Switch 4 enable/control input. High level (>= VIH) closes the switch between 4Y and 4Z; low level opens it. CMOS logic input referenced to VCC/GND."
      },
      {
        "number": "13",
        "name": "1E",
        "type": "input",
        "description": "Switch 1 enable/control input. High level (>= VIH) closes the switch between 1Y and 1Z; low level opens it. CMOS logic input referenced to VCC/GND."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply. 2 V to 10 V for HC types; 4.5 V to 5.5 V for HCT type. Sets the upper bound for analog signal swing and the CMOS logic-input thresholds on the E pins."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/cd74hc4066.pdf",
        "pages": 25,
        "sha256": "3d3eafb15fb8109c",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "logic": {
      "family_id": "74HC4066",
      "logic_family": "74HC",
      "function_code": "4066",
      "function_class": "AnalogSwitch",
      "function_name": "Quad Bilateral Switch",
      "manufacturer": "Texas Instruments",
      "is_specialty": false
    },
    "models_3d": [
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        "file": "cd74hc4066.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          8.7,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cd74hc4066-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e2279a8c27c58c47c2fd9007eb6505fe8dc0a6c0808a55f84b3b4cb475d3b279",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Quad bilateral analog switch",
      "Switches": "4 independent SPST (bidirectional)",
      "Control": "one enable per switch (active-high)",
      "On-resistance": "~50 Ω typ at 4.5 V",
      "Signal range": "rail to rail",
      "Supply voltage": "2-6 V",
      "Common uses": "analog mux, routing, sample-hold",
      "Package": "SOIC-14"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "cd74hc4066",
    "74hc4066",
    "4066",
    "quad analog switch",
    "bilateral switch",
    "transmission gate"
  ],
  "discovery_pitch": "CD74HC4066 quad bilateral analog switch (SOIC-14) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cd74hc4066.kicad_sym",
    "cd74hc4066.kicad_mod",
    "cd74hc4066.glb",
    "cd74hc4066.lbr",
    "docs/hero.png",
    "docs/cd74hc4066-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cd74hc4066-etched.step"
  ],
  "variants": [
    {
      "mpn": "CD74HC4066M (SOIC-14, tube)",
      "kind": "packaging"
    },
    {
      "mpn": "CD74HC4066M96 (SOIC-14, tape & reel)",
      "kind": "packaging"
    }
  ]
}