CD74HC4051PWR

{
  "schema_version": 1,
  "type": "component",
  "slug": "cd74hc4051pwr",
  "title": "CD74HC4051PWR",
  "brief": "Texas Instruments Signal Switches / Encoders & Decoders / Multiplexers, TSSOP-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "cd74hc4051pwr"
  ],
  "component": {
    "mpn": "CD74HC4051PWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches / Encoders & Decoders / Multiplexers",
    "datasheet": "https://www.ti.com/lit/ds/symlink/cd74hc4051.pdf",
    "parts": {
      "symbol": "cd74hc4051pwr.kicad_sym",
      "footprint": "cd74hc4051pwr.kicad_mod",
      "model_3d": "cd74hc4051pwr-etched.glb",
      "model_3d_plain": "cd74hc4051pwr.glb",
      "model_3d_step": "cd74hc4051pwr-etched.step",
      "model_3d_step_plain": "cd74hc4051pwr.step",
      "lbr": "cd74hc4051pwr.lbr"
    },
    "distributor_links": {
      "digikey": "296-13031-2-ND",
      "lcsc": "C352826"
    },
    "pins": [
      {
        "number": "1",
        "name": "A4",
        "type": "bidirectional",
        "description": "Channel 4 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 100 and !E is low."
      },
      {
        "number": "2",
        "name": "A6",
        "type": "bidirectional",
        "description": "Channel 6 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 110 and !E is low."
      },
      {
        "number": "3",
        "name": "COM",
        "type": "bidirectional",
        "description": "Common out/in. Shared analog terminal connected to one of A0..A7 based on address inputs S0..S2. Bidirectional analog signal path."
      },
      {
        "number": "4",
        "name": "A7",
        "type": "bidirectional",
        "description": "Channel 7 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 111 and !E is low."
      },
      {
        "number": "5",
        "name": "A5",
        "type": "bidirectional",
        "description": "Channel 5 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 101 and !E is low."
      },
      {
        "number": "6",
        "name": "~{E}",
        "type": "input",
        "description": "Enable, active low. When low, the selected channel is connected to COM. When high, all switches are disabled (high impedance)."
      },
      {
        "number": "7",
        "name": "VEE",
        "type": "power_in",
        "description": "Negative analog supply. Sets the lower limit of the analog signal range. Recommended range 0 V to -6 V; VCC-VEE must be 2 V to 10 V."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / digital and logic reference (0 V). All voltages are referenced to this pin unless otherwise specified."
      },
      {
        "number": "9",
        "name": "S2",
        "type": "input",
        "description": "Channel select bit 2 (MSB). Digital input selecting which of A0..A7 is routed to COM. LSTTL/CMOS-level input; VIH >= 2 V, VIL <= 0.8 V (HCT)."
      },
      {
        "number": "10",
        "name": "S1",
        "type": "input",
        "description": "Channel select bit 1. Digital input selecting which of A0..A7 is routed to COM. LSTTL/CMOS-level input."
      },
      {
        "number": "11",
        "name": "S0",
        "type": "input",
        "description": "Channel select bit 0 (LSB). Digital input selecting which of A0..A7 is routed to COM. LSTTL/CMOS-level input."
      },
      {
        "number": "12",
        "name": "A3",
        "type": "bidirectional",
        "description": "Channel 3 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 011 and !E is low."
      },
      {
        "number": "13",
        "name": "A0",
        "type": "bidirectional",
        "description": "Channel 0 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 000 and !E is low."
      },
      {
        "number": "14",
        "name": "A1",
        "type": "bidirectional",
        "description": "Channel 1 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 001 and !E is low."
      },
      {
        "number": "15",
        "name": "A2",
        "type": "bidirectional",
        "description": "Channel 2 in/out. Bidirectional analog switch terminal; connected to COM (pin 3) when selected via S2:S0 = 010 and !E is low."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive digital/analog supply. Recommended 2 V to 6 V for HC parts (4.5 V to 5.5 V for HCT). Sets the upper limit of the analog signal range."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/cd74hc4051.pdf",
        "pages": 50,
        "sha256": "7bf0d4b1a02045fc",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.8625,
        -2.275
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "TSSOP-16_4.4x5mm_P0.65mm@sha256:fbac79fc5f310754",
      "mark": "drawn"
    },
    "logic": {
      "family_id": "74HC4051",
      "logic_family": "74HC",
      "function_code": "4051",
      "function_class": "Multiplexer",
      "function_name": "8-Channel Analog Multiplexer/Demultiplexer",
      "manufacturer": "Texas Instruments",
      "is_specialty": false
    },
    "models_3d": [
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        "file": "cd74hc4051pwr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cd74hc4051pwr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "80b44828dab085cf2e2ef1db1800cb2ba761de85c2aacf8b421e4fbdade4ebb2",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-16",
      "Category": "Logic",
      "Pins": "16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "cd74hc4051pwr"
  ],
  "discovery_pitch": "CD74HC4051PWR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cd74hc4051pwr.kicad_sym",
    "cd74hc4051pwr.kicad_mod",
    "cd74hc4051pwr.glb",
    "cd74hc4051pwr.step",
    "cd74hc4051pwr-etched.step",
    "cd74hc4051pwr.lbr",
    "docs/hero.png",
    "docs/cd74hc4051pwr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "CD74HC4051PWR",
      "kind": "packaging"
    },
    {
      "mpn": "CD74HC4051PWRD",
      "kind": "packaging"
    },
    {
      "mpn": "CD74HC4051PWRDR",
      "kind": "packaging"
    },
    {
      "mpn": "CD74HC4051PWRNS",
      "kind": "packaging"
    },
    {
      "mpn": "CD74HC4051PWRNSR",
      "kind": "packaging"
    },
    {
      "mpn": "CD74HC4051PWRN",
      "kind": "packaging"
    },
    {
      "mpn": "CD74HC4051PWRNE",
      "kind": "packaging"
    },
    {
      "mpn": "CD74HC4051PWRJ",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T18:54:48.125Z"
}