CA-IS3721HW

{
  "slug": "ca-is3721hw",
  "version": "0.1.0",
  "type": "component",
  "description": "Chipanalog Digital Isolators, SOIC-16-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "signal isolation devices",
    "ca-is3721hw",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ca-is3721hw.kicad_sym",
    "ca-is3721hw.kicad_mod",
    "ca-is3721hw.glb",
    "ca-is3721hw.step",
    "ca-is3721hw.lbr",
    "docs/hero.png",
    "docs/ca-is3721hw-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ca-is3721hw-hero.glb",
    "ca-is3721hw-hero.overlay.json",
    "ca-is3721hw-etched.glb"
  ],
  "component": {
    "mpn": "CA-IS3721HW",
    "manufacturer": "Chipanalog",
    "package": "SOIC-16-300mil",
    "pin_count": 16,
    "category": "Signal Isolation Devices",
    "subcategory": "Digital Isolators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603114279264935936",
    "parts": {
      "symbol": "ca-is3721hw.kicad_sym",
      "footprint": "ca-is3721hw.kicad_mod",
      "model_3d": "ca-is3721hw-hero.glb",
      "model_3d_plain": "ca-is3721hw-etched.glb",
      "model_3d_step": "ca-is3721hw-etched.step",
      "model_3d_step_plain": "ca-is3721hw.step",
      "lbr": "ca-is3721hw.lbr"
    },
    "distributor_links": {
      "lcsc": "C5337993"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T01:49:58Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GNDA",
        "type": "power_in",
        "description": "A-side ground reference point for the isolator's input side; GNDA is tied internally to pin 7."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; the pin may be left floating or connected to VDD or GND."
      },
      {
        "number": "3",
        "name": "VDDA",
        "type": "power_in",
        "description": "A-side supply voltage; recommended operating range is 2.375 V to 5.5 V (typical 3.3 V), with 0.1 µF to 1 µF bypass capacitance required."
      },
      {
        "number": "4",
        "name": "VI1",
        "type": "input",
        "description": "A-side logic input for channel 1 of CA-IS3721, TTL-compatible with Schmitt-trigger input (VIH 2.0 V min, VIL 0.8 V max)."
      },
      {
        "number": "5",
        "name": "VO2",
        "type": "output",
        "description": "A-side logic output for channel 2 of CA-IS3721 (reverse channel); it drives the output as the RX side and defaults high on loss of input power or signal for the H-suffix device."
      },
      {
        "number": "6",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; the pin may be left floating or connected to VDD or GND."
      },
      {
        "number": "7",
        "name": "GNDA",
        "type": "power_in",
        "description": "A-side ground reference point for the isolator's input side; GNDA is tied internally to pin 1."
      },
      {
        "number": "8",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; the pin may be left floating or connected to VDD or GND."
      },
      {
        "number": "9",
        "name": "GNDB",
        "type": "power_in",
        "description": "B-side ground reference point for the isolated output side; GNDB is tied internally to pin 16."
      },
      {
        "number": "10",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; the pin may be left floating or connected to VDD or GND."
      },
      {
        "number": "11",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; the pin may be left floating or connected to VDD or GND."
      },
      {
        "number": "12",
        "name": "VI2",
        "type": "input",
        "description": "B-side logic input for channel 2 of CA-IS3721, TTL-compatible with Schmitt-trigger input (VIH 2.0 V min, VIL 0.8 V max)."
      },
      {
        "number": "13",
        "name": "VO1",
        "type": "output",
        "description": "B-side logic output for channel 1 of CA-IS3721; it follows the A-side input and defaults high on loss of input power or signal for the H-suffix device."
      },
      {
        "number": "14",
        "name": "VDDB",
        "type": "power_in",
        "description": "B-side supply voltage; recommended operating range is 2.375 V to 5.5 V (typical 3.3 V), with 0.1 µF to 1 µF bypass capacitance required."
      },
      {
        "number": "15",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; the pin may be left floating or connected to VDD or GND."
      },
      {
        "number": "16",
        "name": "GNDB",
        "type": "power_in",
        "description": "B-side ground reference point for the isolated output side; GNDB is tied internally to pin 9."
      }
    ],
    "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: Table 6-1 gives a combined pinout for all CA-IS371x/2x SOIC16-WB variants. Pin functions were mapped; Pin 5 is labelled 'VI2/VO2/NC1' in the datasheet, and the NC note applies only to CA-IS3710. For CA-; The datasheet is in Chinese. Pin descriptions are translated into English; the logic thresholds (VIH"
        ],
        "pages_sent": 25,
        "cost_usd": 0.1236,
        "at": "2026-10-19T01:47:23"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603114279264935936",
        "pages": 25,
        "sha256": "e0570f476c6a89dd",
        "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": "ca-is3721hw.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": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ca-is3721hw-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": "457fdc821c4780f736cb34753cf981e84805801e3d5342f8f5f6c3f0e27cd716",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}