CA-IF4289

{
  "slug": "ca-if4289",
  "version": "0.1.0",
  "type": "component",
  "description": "Chipanalog Buffers, Drivers, Receivers, Transceivers, QFN-24(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "ca-if4289",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "ca-if4289.kicad_sym",
    "ca-if4289.kicad_mod",
    "ca-if4289.glb",
    "ca-if4289.step",
    "ca-if4289.lbr",
    "docs/hero.png",
    "docs/ca-if4289-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ca-if4289-hero.glb",
    "ca-if4289-hero.overlay.json",
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  "component": {
    "mpn": "CA-IF4289",
    "manufacturer": "Chipanalog",
    "package": "QFN-24(4x4)",
    "pin_count": 25,
    "category": "Logic",
    "subcategory": "Buffers, Drivers, Receivers, Transceivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602993957483921408",
    "parts": {
      "symbol": "ca-if4289.kicad_sym",
      "footprint": "ca-if4289.kicad_mod",
      "model_3d": "ca-if4289-hero.glb",
      "model_3d_plain": "ca-if4289-etched.glb",
      "model_3d_step": "ca-if4289-etched.step",
      "model_3d_step_plain": "ca-if4289.step",
      "lbr": "ca-if4289.lbr"
    },
    "distributor_links": {
      "lcsc": "C7422561"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T03:05:19Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "DOUT",
        "type": "output",
        "description": "Open-drain logic data output that requires a pull-up resistor to the logic supply; DOUT goes high when the AIO-BIO edge crosses VTVL and goes high-impedance when the trailing edge crosses VTVT."
      },
      {
        "number": "2",
        "name": "DIN",
        "type": "input",
        "description": "Logic data input; DIN high-to-low reverses the polarity of AIO and BIO, and DIN low-to-high puts AIO and BIO in high impedance."
      },
      {
        "number": "3",
        "name": "RST",
        "type": "input",
        "description": "Bus reset control input; pulling RST low enables the transmitter on AIO and BIO and pulling it high disables it, and RST also controls the dynamic termination switch."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "5",
        "name": "/PG_P",
        "type": "output",
        "description": "Open-drain active-low output that indicates the bus is powered with positive polarity (VHP-VHN > 3V)."
      },
      {
        "number": "6",
        "name": "/PG_N",
        "type": "output",
        "description": "Open-drain active-low output that indicates the bus is powered with negative polarity (VHN-VHP > 3V)."
      },
      {
        "number": "7",
        "name": "BIO",
        "type": "bidirectional",
        "description": "Home bus data input/output; in 57.6kbps applications it connects to the bus through a 1 uF capacitor in series with a 4.7 Ohm resistor."
      },
      {
        "number": "8",
        "name": "HN",
        "type": "input",
        "description": "Home bus interface pin that must be connected to the bus through a series resistor of about 200 Ohm to limit surge voltage."
      },
      {
        "number": "9",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin; star-connect all grounds close to this pin."
      },
      {
        "number": "10",
        "name": "HP",
        "type": "input",
        "description": "Home bus interface pin that must be connected to the bus through a series resistor of about 200 Ohm to limit surge voltage."
      },
      {
        "number": "11",
        "name": "AIO",
        "type": "bidirectional",
        "description": "Home bus data input/output; in 57.6kbps applications it connects to the bus through a 1 uF capacitor in series with a 4.7 Ohm resistor."
      },
      {
        "number": "12",
        "name": "TERM",
        "type": "output",
        "description": "Switchable bus termination; a resistor (typically 100 Ohm, recommended 50 to 240 Ohm) is connected between TERM and BIO to match cable termination impedance."
      },
      {
        "number": "13",
        "name": "EN_VT",
        "type": "input",
        "description": "Active-high internal receiver threshold enable; when high, internal TVL (2.0 V typ.) and TVT (1.5 V typ.) are used, and it has an internal 1 MOhm pulldown and is disabled if left floating."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "15",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "16",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin."
      },
      {
        "number": "17",
        "name": "VCC",
        "type": "power_in",
        "description": "Chip supply input; operating range 4.5 V to 5.5 V (5 V typ.)."
      },
      {
        "number": "18",
        "name": "VCC",
        "type": "power_in",
        "description": "Chip supply input; operating range 4.5 V to 5.5 V (5 V typ.)."
      },
      {
        "number": "19",
        "name": "WT_ENb",
        "type": "input",
        "description": "Active-low DIN low-timeout protection enable; when low, AIO/BIO go high-impedance after DIN has been low for more than 21 ms, and the pin has an internal 180 kOhm pulldown so it is enabled if left floating."
      },
      {
        "number": "20",
        "name": "HPEN",
        "type": "input",
        "description": "High-pass filter enable: connect to VCC to enable the receiver high-pass filter or to GND to disable it; do not leave it floating."
      },
      {
        "number": "21",
        "name": "TVL",
        "type": "input",
        "description": "Leading-edge receiver threshold input; must satisfy VTVL > VTVT when external thresholds are used (EN_VT low)."
      },
      {
        "number": "22",
        "name": "TVT",
        "type": "input",
        "description": "Trailing-edge receiver threshold input; must be lower than TVL (recommended VTVT of 1.5 V minimum per the recommended operating conditions)."
      },
      {
        "number": "23",
        "name": "SRA",
        "type": "input",
        "description": "Slew-rate adjust input; a resistor from SRA to GND sets the AIO/BIO edge slope, with RSRA recommended between 20 kOhm and 120 kOhm (33 kOhm typical)."
      },
      {
        "number": "24",
        "name": "DTA",
        "type": "input",
        "description": "Bus dynamic termination time adjust; an external 10 kOhm to 500 kOhm resistor to GND sets the termination on-time (about 10 us to 500 us), and when floating the on-time is 34 us."
      },
      {
        "number": "25",
        "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 pin-number diagram text on page 6 is garbled; the pin-to-name mapping was taken from the Table 6; Pin types for HP, HN, TERM and BIO/AIO follow the datasheet's table ('input', 'output', 'input/outpu; Exposed pad 'EP' is included as a thermal pad connected to GND per the datasheet; it is not one of t",
          "exposed pad 25 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 20,
        "cost_usd": 0.0951,
        "at": "2026-10-18T03:03:10"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602993957483921408",
        "pages": 20,
        "sha256": "fd4e29ca379c5af9",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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    },
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        "units": "mm",
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        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f7d256794c4147daf24dcae0554fae18510315e565ad1e239b475be7fef80d8b",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ca-if4289-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0.0,
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        "sha256": "741a0539d09cd3ca9b2cffe84f1702f8acf9cc2f14b10553bb986c09d76e61b0",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}