CA-IF4289

{
  "schema_version": 1,
  "type": "component",
  "slug": "ca-if4289",
  "title": "CA-IF4289",
  "brief": "Chipanalog Buffers, Drivers, Receivers, Transceivers, QFN-24(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "ca-if4289",
    "factory-2.0.0",
    "extractor-text"
  ],
  "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": {
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
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          "exposed pad 25 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
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        "at": "2026-10-18T03:03:10"
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  "metadata": {
    "specs": {
      "Manufacturer": "Chipanalog",
      "Package": "QFN-24(4x4)",
      "Category": "Logic",
      "Pins": "25"
    },
    "characteristics": {
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          "name": "VCC,AIO,BIO,TERM 端口连续电流",
          "symbol": "",
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          "unit": "mA",
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          "typ": null,
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        {
          "name": "其他管脚连续电流",
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        {
          "name": "UVLO 电压 Vcc 电压上升",
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          "min": 4,
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        {
          "name": "终端开关导通电阻",
          "symbol": "RTERM",
          "kind": "electrical",
          "unit": "Ω",
          "min": 2.5,
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        {
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          "unit": "kΩ",
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          "source_page": 9,
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        {
          "name": "偏置电压匹配比例",
          "symbol": "VAIO/ VBIO",
          "kind": "tolerance",
          "unit": "%",
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        {
          "name": "内部高电平阈值",
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          "name": "内部低电平阈值",
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        {
          "name": "TVL,TVT 输入漏电流",
          "symbol": "ITHLEAK",
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          "conditions": "RSRA=62kΩ，RLOAD=200Ω",
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          "source_page": 10,
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          "name": "传输输出对称性",
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          "kind": "timing",
          "unit": "μs",
          "min": -0.4,
          "typ": 0,
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          "conditions": "RSRA=62kΩ， RLOAD=200Ω",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "总线高电平检测电压",
          "symbol": "Vhigh",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": 3,
          "max": 3.5,
          "conditions": "HP-HN 电压上升直到/PG_P 变低时的值",
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        {
          "name": "总线低电平检测电压",
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          "unit": "V",
          "min": 2.5,
          "typ": 3,
          "max": 3.5,
          "conditions": "HN-HP 电压 上升直到/PG_N 变低时的值",
          "source_page": 10,
          "source": "datasheet"
        }
      ]
    }
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