74HC4051LQ

{
  "schema_version": 1,
  "type": "component",
  "slug": "74hc4051lq",
  "title": "74HC4051LQ",
  "brief": "HGSEMI Analog Switches, Multiplexers, QFN-16(3x3). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "74hc4051lq"
  ],
  "component": {
    "mpn": "74HC4051LQ",
    "manufacturer": "HGSEMI",
    "package": "QFN-16(3x3)",
    "pin_count": 16,
    "category": "Interface",
    "subcategory": "Analog Switches, Multiplexers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/6c8e1b36c253985bb48bb112a4dda326.pdf",
    "parts": {
      "symbol": "74hc4051lq.kicad_sym",
      "footprint": "74hc4051lq.kicad_mod",
      "model_3d": "74hc4051lq-etched.glb",
      "model_3d_plain": "74hc4051lq.glb",
      "model_3d_step": "74hc4051lq-etched.step",
      "model_3d_step_plain": "74hc4051lq.step",
      "lbr": "74hc4051lq.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "Y4",
        "type": "bidirectional",
        "description": "Independent analog I/O channel 4. Connects to common Z pin when A2:A0 = 100 and E is low. On-resistance ~50-350 Ω depending on VDD-VEE."
      },
      {
        "number": "2",
        "name": "Y6",
        "type": "bidirectional",
        "description": "Independent analog I/O channel 6. Connects to common Z pin when A2:A0 = 110 and E is low."
      },
      {
        "number": "3",
        "name": "Z",
        "type": "bidirectional",
        "description": "Common analog I/O. Routes to one of Y0-Y7 selected by A2:A0 when E is low. High-impedance when E is high."
      },
      {
        "number": "4",
        "name": "Y7",
        "type": "bidirectional",
        "description": "Independent analog I/O channel 7. Connects to common Z pin when A2:A0 = 111 and E is low."
      },
      {
        "number": "5",
        "name": "Y5",
        "type": "bidirectional",
        "description": "Independent analog I/O channel 5. Connects to common Z pin when A2:A0 = 101 and E is low."
      },
      {
        "number": "6",
        "name": "E",
        "type": "input",
        "description": "Active-low enable input. When low, one Y channel is connected to Z per A2:A0; when high, all channels are turned off (high-impedance)."
      },
      {
        "number": "7",
        "name": "VEE",
        "type": "power_in",
        "description": "Negative analog supply. Range -6 V to 0 V; sets lower analog signal rail. Tie to VSS for single-supply digital multiplexer use."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground / reference for digital control inputs (A0-A2, E)."
      },
      {
        "number": "9",
        "name": "A2",
        "type": "input",
        "description": "Address select input bit 2 (MSB). Digital logic level referenced to VDD/VSS."
      },
      {
        "number": "10",
        "name": "A1",
        "type": "input",
        "description": "Address select input bit 1. Digital logic level referenced to VDD/VSS."
      },
      {
        "number": "11",
        "name": "A0",
        "type": "input",
        "description": "Address select input bit 0 (LSB). Digital logic level referenced to VDD/VSS."
      },
      {
        "number": "12",
        "name": "Y3",
        "type": "bidirectional",
        "description": "Independent analog I/O channel 3. Connects to common Z pin when A2:A0 = 011 and E is low."
      },
      {
        "number": "13",
        "name": "Y0",
        "type": "bidirectional",
        "description": "Independent analog I/O channel 0. Connects to common Z pin when A2:A0 = 000 and E is low."
      },
      {
        "number": "14",
        "name": "Y1",
        "type": "bidirectional",
        "description": "Independent analog I/O channel 1. Connects to common Z pin when A2:A0 = 001 and E is low."
      },
      {
        "number": "15",
        "name": "Y2",
        "type": "bidirectional",
        "description": "Independent analog I/O channel 2. Connects to common Z pin when A2:A0 = 010 and E is low."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply. Operating range 3.0 V to 9.0 V (with VDD-VEE ≤ 9 V). Powers digital logic and sets upper analog signal rail."
      }
    ],
    "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"
    },
    "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": "74hc4051lq.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3,
          3,
          0.9
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "4bafaf1bb48873ff43b364918bf5e1f4278a211ad76791ed7928096d98c1768a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hc4051lq-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3,
          3,
          0.9
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd2a0fe9506ca322f25af98a58aba32f50d5668076383d9524ea73fb78f76b3f",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "QFN-16(3x3)",
      "Category": "Interface",
      "Pins": "16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "74hc4051lq"
  ],
  "discovery_pitch": "74HC4051LQ (HGSEMI) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74hc4051lq.kicad_sym",
    "74hc4051lq.kicad_mod",
    "74hc4051lq.glb",
    "74hc4051lq.step",
    "74hc4051lq.lbr",
    "docs/hero.png",
    "docs/74hc4051lq-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74hc4051lq-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T14:58:32.241Z"
}