CH444G

{
  "slug": "ch444g",
  "version": "0.1.0",
  "type": "component",
  "description": "WCH Jiangsu Qin Heng Analog Switches, Multiplexers, SOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "ch444g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ch444g.kicad_sym",
    "ch444g.kicad_mod",
    "ch444g.glb",
    "ch444g.step",
    "ch444g.lbr",
    "docs/hero.png",
    "docs/ch444g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ch444g-hero.glb",
    "ch444g-hero.overlay.json"
  ],
  "component": {
    "mpn": "CH444G",
    "manufacturer": "WCH Jiangsu Qin Heng",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Interface",
    "subcategory": "Analog Switches, Multiplexers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588882176397463552",
    "parts": {
      "symbol": "ch444g.kicad_sym",
      "footprint": "ch444g.kicad_mod",
      "model_3d": "ch444g-hero.glb",
      "model_3d_plain": "ch444g.glb",
      "model_3d_step": "ch444g-etched.step",
      "model_3d_step_plain": "ch444g.step",
      "lbr": "ch444g.lbr"
    },
    "distributor_links": {
      "lcsc": "C86413"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T16:16:24Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "EN#",
        "type": "input",
        "description": "Global enable input, active low: when EN# is high, all analog switches are disconnected regardless of IN1/IN0."
      },
      {
        "number": "2",
        "name": "IN1",
        "type": "input",
        "description": "Select input (high bit) for the 4:1 analog switches; with IN1&IN0 at 00, 01, 10 or 11 the 1#, 2#, 3# or 4# ports are selected."
      },
      {
        "number": "3",
        "name": "S4A",
        "type": "passive",
        "description": "Port 4 of the 4:1 analog switch A, selected when IN1&IN0 = 11; the recommended analog signal range is 0 to 2.8 V at VCC = 5 V."
      },
      {
        "number": "4",
        "name": "S3A",
        "type": "passive",
        "description": "Port 3 of the 4:1 analog switch A, selected when IN1&IN0 = 10."
      },
      {
        "number": "5",
        "name": "S2A",
        "type": "passive",
        "description": "Port 2 of the 4:1 analog switch A, selected when IN1&IN0 = 01."
      },
      {
        "number": "6",
        "name": "S1A",
        "type": "passive",
        "description": "Port 1 of the 4:1 analog switch A, selected when IN1&IN0 = 00."
      },
      {
        "number": "7",
        "name": "YA",
        "type": "passive",
        "description": "Common terminal of the 4:1 analog switch A, connected to one of S1A-S4A as selected by IN1/IN0 when EN# is low."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground and reference for the digital signals; the datasheet requires a good ground connection to limit interference."
      },
      {
        "number": "9",
        "name": "YB",
        "type": "passive",
        "description": "Common terminal of the 4:1 analog switch B, connected to one of S1B-S4B as selected by IN1/IN0 when EN# is low."
      },
      {
        "number": "10",
        "name": "S1B",
        "type": "passive",
        "description": "Port 1 of the 4:1 analog switch B, selected when IN1&IN0 = 00."
      },
      {
        "number": "11",
        "name": "S2B",
        "type": "passive",
        "description": "Port 2 of the 4:1 analog switch B, selected when IN1&IN0 = 01."
      },
      {
        "number": "12",
        "name": "S3B",
        "type": "passive",
        "description": "Port 3 of the 4:1 analog switch B, selected when IN1&IN0 = 10."
      },
      {
        "number": "13",
        "name": "S4B",
        "type": "passive",
        "description": "Port 4 of the 4:1 analog switch B, selected when IN1&IN0 = 11; the recommended analog signal range is 0 to 2.8 V at VCC = 5 V."
      },
      {
        "number": "14",
        "name": "IN0",
        "type": "input",
        "description": "Select input (low bit) for the 4:1 analog switches, used together with IN1 to choose ports 1# to 4#."
      },
      {
        "number": "15",
        "name": "NC",
        "type": "unconnected",
        "description": "Reserved pin; the datasheet states it must not be connected."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply; the 5 V part is rated for 4.0 V to 5.5 V operation with an absolute maximum of 6.5 V."
      }
    ],
    "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 datasheet lists CH444G and CH444P pin numbers side by side in one table (section 4.4). The CH444; The schema has no field for headline specs, so the supply and operating limits were only referenced "
        ],
        "pages_sent": 16,
        "cost_usd": 0.0801,
        "at": "2026-10-09T16:14:00"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588882176397463552",
        "pages": 16,
        "sha256": "19c56b918901f689",
        "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"
    },
    "models_3d": [
      {
        "file": "ch444g.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": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ch444g-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": "069ca2401e5583e8d34a53c35d43b0d4b3679d155fec273fd033c772e5c501b4",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}