74HC4851BQ

{
  "slug": "74hc4851bq",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Analog Switches, Multiplexers, DHVQFN-16-EP(2.5x3.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "74hc4851bq",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74hc4851bq.kicad_sym",
    "74hc4851bq.kicad_mod",
    "74hc4851bq.glb",
    "74hc4851bq.step",
    "74hc4851bq.lbr",
    "docs/hero.png",
    "docs/74hc4851bq-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74hc4851bq-hero.glb",
    "74hc4851bq-hero.overlay.json",
    "74hc4851bq-etched.glb"
  ],
  "component": {
    "mpn": "74HC4851BQ",
    "manufacturer": "Nexperia",
    "package": "DHVQFN-16-EP(2.5x3.5)",
    "pin_count": 17,
    "category": "Interface",
    "subcategory": "Analog Switches, Multiplexers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588915462235435008",
    "parts": {
      "symbol": "74hc4851bq.kicad_sym",
      "footprint": "74hc4851bq.kicad_mod",
      "model_3d": "74hc4851bq-hero.glb",
      "model_3d_plain": "74hc4851bq-etched.glb",
      "model_3d_step": "74hc4851bq-etched.step",
      "model_3d_step_plain": "74hc4851bq.step",
      "lbr": "74hc4851bq.lbr"
    },
    "distributor_links": {
      "lcsc": "C547078"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T15:46:35Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Y4",
        "type": "passive",
        "description": "Independent analog input/output channel 4, connected to Z when E is LOW and S2 = HIGH, S1 = LOW, S0 = LOW; switch voltage is specified from GND to VCC."
      },
      {
        "number": "2",
        "name": "Y6",
        "type": "passive",
        "description": "Independent analog input/output channel 6, connected to Z when E is LOW and S2 = HIGH, S1 = HIGH, S0 = LOW; switch voltage is specified from GND to VCC."
      },
      {
        "number": "3",
        "name": "Z",
        "type": "passive",
        "description": "Common analog input/output that is connected to the selected Yn channel when E is LOW; switch voltage is specified from GND to VCC."
      },
      {
        "number": "4",
        "name": "Y7",
        "type": "passive",
        "description": "Independent analog input/output channel 7, connected to Z when E is LOW and S2, S1, S0 are all HIGH; switch voltage is specified from GND to VCC."
      },
      {
        "number": "5",
        "name": "Y5",
        "type": "passive",
        "description": "Independent analog input/output channel 5, connected to Z when E is LOW and S2 = HIGH, S1 = LOW, S0 = HIGH; switch voltage is specified from GND to VCC."
      },
      {
        "number": "6",
        "name": "E",
        "type": "input",
        "description": "Active-LOW enable input; when HIGH all switches are in the high-impedance OFF-state regardless of S0 to S2."
      },
      {
        "number": "7",
        "name": "n.c.",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for all voltages in the datasheet."
      },
      {
        "number": "9",
        "name": "S2",
        "type": "input",
        "description": "Select input (most significant bit of channel select) for the 1-of-8 channel decoder, active only while E is LOW."
      },
      {
        "number": "10",
        "name": "S1",
        "type": "input",
        "description": "Select input (middle bit of channel select) for the 1-of-8 channel decoder, active only while E is LOW."
      },
      {
        "number": "11",
        "name": "S0",
        "type": "input",
        "description": "Select input (least significant bit of channel select) for the 1-of-8 channel decoder, active only while E is LOW."
      },
      {
        "number": "12",
        "name": "Y3",
        "type": "passive",
        "description": "Independent analog input/output channel 3, connected to Z when E is LOW and S2 = LOW, S1 = HIGH, S0 = HIGH; switch voltage is specified from GND to VCC."
      },
      {
        "number": "13",
        "name": "Y0",
        "type": "passive",
        "description": "Independent analog input/output channel 0, connected to Z when E is LOW and S2, S1, S0 are all LOW; switch voltage is specified from GND to VCC."
      },
      {
        "number": "14",
        "name": "Y1",
        "type": "passive",
        "description": "Independent analog input/output channel 1, connected to Z when E is LOW and S0 = HIGH with S2 = S1 = LOW; switch voltage is specified from GND to VCC."
      },
      {
        "number": "15",
        "name": "Y2",
        "type": "passive",
        "description": "Independent analog input/output channel 2, connected to Z when E is LOW and S1 = HIGH with S2 = S0 = LOW; switch voltage is specified from GND to VCC."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; the 74HC4851 is specified for 2.0 V to 6.0 V, and the absolute maximum is 7.0 V."
      },
      {
        "number": "17",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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: The DHVQFN16 package has an exposed thermal pad marked GND(1) in the pinout drawing. It is not a num; Y0-Y7 and Z are described in the datasheet as input/output. They are mapped to KiCad 'passive' as an; The pin-description table lists Y4, Y6, Y7, Y5, Y3, Y0, Y1, Y2 as pins 1, 2, 4, 5, 12, 13, 14, 15 in",
          "exposed pad 17 added from the footprint"
        ],
        "pages_sent": 19,
        "cost_usd": 0.1,
        "at": "2026-10-17T15:42:24"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588915462235435008",
        "pages": 19,
        "sha256": "244b13d1b9d615b4",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "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": "z = 0",
        "extents_mm": [
          2.52,
          3.52,
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d7365ea72d16358091a210077ec34a9299ea72b8f1aa8406e1bc5152e28b7ea2",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hc4851bq-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": 0.0,
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        "sha256": "339e4863a466b01397a6148b66d874d906ccb4ea730852d3a1ee2d725239ae93",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}