74HC4051M

{
  "schema_version": 1,
  "type": "component",
  "slug": "74hc4051m",
  "title": "74HC4051M",
  "brief": "HGSEMI Signal Switches / Encoders & Decoders / Multiplexers, SOP-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "74hc4051m"
  ],
  "component": {
    "mpn": "74HC4051M",
    "manufacturer": "HGSEMI",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches / Encoders & Decoders / Multiplexers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/6c8e1b36c253985bb48bb112a4dda326.pdf",
    "parts": {
      "symbol": "74hc4051m.kicad_sym",
      "footprint": "74hc4051m.kicad_mod",
      "model_3d": "74hc4051m-etched.glb",
      "model_3d_plain": "74hc4051m.glb",
      "model_3d_step": "74hc4051m-etched.step",
      "model_3d_step_plain": "74hc4051m.step",
      "lbr": "74hc4051m.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "Y4",
        "type": "bidirectional",
        "description": "Independent analog input/output channel 4. Connects to common Z pin when A2:A0 = 100 and E is low. Analog signal range: VEE to VDD."
      },
      {
        "number": "2",
        "name": "Y6",
        "type": "bidirectional",
        "description": "Independent analog input/output channel 6. Connects to common Z pin when A2:A0 = 110 and E is low. Analog signal range: VEE to VDD."
      },
      {
        "number": "3",
        "name": "Z",
        "type": "bidirectional",
        "description": "Common analog input/output. This pin is the shared node connected to whichever Yn channel is selected by A2:A0 while E is asserted low."
      },
      {
        "number": "4",
        "name": "Y7",
        "type": "bidirectional",
        "description": "Independent analog input/output channel 7. Connects to common Z pin when A2:A0 = 111 and E is low. Analog signal range: VEE to VDD."
      },
      {
        "number": "5",
        "name": "Y5",
        "type": "bidirectional",
        "description": "Independent analog input/output channel 5. Connects to common Z pin when A2:A0 = 101 and E is low. Analog signal range: VEE to VDD."
      },
      {
        "number": "6",
        "name": "E",
        "type": "input",
        "description": "Active-low enable input. When low, one Yn channel selected by A2:A0 is connected to Z (low-impedance path). When high, all channels are disabled (high-impedance)."
      },
      {
        "number": "7",
        "name": "VEE",
        "type": "power_in",
        "description": "Negative analog supply voltage. Range: -6.0 V to 0 V. VDD-VEE must be 3-9 V. Tie to VSS for single-supply digital mux use."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground / digital logic reference (0 V). Reference for digital control inputs A0-A2 and E."
      },
      {
        "number": "9",
        "name": "A2",
        "type": "input",
        "description": "Channel-select address bit 2 (MSB). Together with A1 and A0 selects which Yn is routed to Z when E is low. Referenced between VSS and VDD."
      },
      {
        "number": "10",
        "name": "A1",
        "type": "input",
        "description": "Channel-select address bit 1. Together with A2 and A0 selects which Yn is routed to Z when E is low."
      },
      {
        "number": "11",
        "name": "A0",
        "type": "input",
        "description": "Channel-select address bit 0 (LSB). Together with A2 and A1 selects which Yn is routed to Z when E is low."
      },
      {
        "number": "12",
        "name": "Y3",
        "type": "bidirectional",
        "description": "Independent analog input/output channel 3. Connects to common Z pin when A2:A0 = 011 and E is low. Analog signal range: VEE to VDD."
      },
      {
        "number": "13",
        "name": "Y0",
        "type": "bidirectional",
        "description": "Independent analog input/output channel 0. Connects to common Z pin when A2:A0 = 000 and E is low. Analog signal range: VEE to VDD."
      },
      {
        "number": "14",
        "name": "Y1",
        "type": "bidirectional",
        "description": "Independent analog input/output channel 1. Connects to common Z pin when A2:A0 = 001 and E is low. Analog signal range: VEE to VDD."
      },
      {
        "number": "15",
        "name": "Y2",
        "type": "bidirectional",
        "description": "Independent analog input/output channel 2. Connects to common Z pin when A2:A0 = 010 and E is low. Analog signal range: VEE to VDD."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply voltage. Range: 3.0 V to 9.0 V (relative to VSS). Also the reference for digital control inputs. VDD-VEE must not exceed 9 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/6c8e1b36c253985bb48bb112a4dda326.pdf",
        "pages": 16,
        "sha256": "f2f56de053e5258f",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -4.445
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-16_3.9x9.9mm_P1.27mm@sha256:f9b5075740f7816c",
      "mark": "drawn"
    },
    "logic": {
      "family_id": "74HC4051",
      "logic_family": "74HC",
      "function_code": "4051",
      "function_class": "Multiplexer",
      "function_name": "8-Channel Analog Multiplexer/Demultiplexer",
      "manufacturer": null,
      "is_specialty": false
    },
    "models_3d": [
      {
        "file": "74hc4051m.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": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hc4051m-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": "7b9c4f299d3148a567f411e74b4f613d2f38252dd603aceb7928826f1e1375c3",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "SOP-16",
      "Category": "Logic",
      "Pins": "16"
    }
  },
  "sections": [
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    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "74hc4051m"
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  "discovery_pitch": "74HC4051M (HGSEMI) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
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  "files": [
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    "README.md",
    "74hc4051m.kicad_sym",
    "74hc4051m.kicad_mod",
    "74hc4051m.glb",
    "74hc4051m.step",
    "74hc4051m-etched.step",
    "74hc4051m.lbr",
    "docs/hero.png",
    "docs/74hc4051m-datasheet.pdf",
    "viewers/symbol.html",
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  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T14:58:41.303Z"
}