CH392T

{
  "slug": "ch392t",
  "version": "0.1.0",
  "type": "component",
  "description": "WCH Jiangsu Qin Heng Ethernet Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "ch392t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ch392t.kicad_sym",
    "ch392t.kicad_mod",
    "ch392t.glb",
    "ch392t.step",
    "ch392t.lbr",
    "docs/hero.png",
    "docs/ch392t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ch392t-hero.glb",
    "ch392t-hero.overlay.json",
    "ch392t-etched.glb"
  ],
  "component": {
    "mpn": "CH392T",
    "manufacturer": "WCH Jiangsu Qin Heng",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Interface",
    "subcategory": "Ethernet Transceivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8618867019068420096",
    "parts": {
      "symbol": "ch392t.kicad_sym",
      "footprint": "ch392t.kicad_mod",
      "model_3d": "ch392t-hero.glb",
      "model_3d_plain": "ch392t-etched.glb",
      "model_3d_step": "ch392t-etched.step",
      "model_3d_step_plain": "ch392t.step",
      "lbr": "ch392t.lbr"
    },
    "distributor_links": {
      "lcsc": "C39831290"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T23:47:01Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RSTI",
        "type": "input",
        "description": "External reset input, active low; when low the chip is held in reset and after release it delays about 35 ms before normal operation."
      },
      {
        "number": "2",
        "name": "SEL",
        "type": "input",
        "description": "Communication interface select with internal pull-up: high selects the asynchronous UART, low selects the SPI interface, sampled at power-on reset."
      },
      {
        "number": "3",
        "name": "TXD",
        "type": "output",
        "description": "Asynchronous serial data output to the host MCU."
      },
      {
        "number": "4",
        "name": "RXD",
        "type": "input",
        "description": "Asynchronous serial data input from the host MCU, with internal pull-up resistor."
      },
      {
        "number": "5",
        "name": "SCS",
        "type": "input",
        "description": "SPI chip select input, active low."
      },
      {
        "number": "6",
        "name": "SCK",
        "type": "input",
        "description": "SPI clock input; the chip samples data on the rising edge and outputs on the falling edge (SPI mode 0 or 3)."
      },
      {
        "number": "7",
        "name": "SDO",
        "type": "output",
        "description": "SPI data output to the host MCU MISO line."
      },
      {
        "number": "8",
        "name": "SDI",
        "type": "input",
        "description": "SPI data input from the host MCU MOSI line."
      },
      {
        "number": "9",
        "name": "RXP",
        "type": "passive",
        "description": "Ethernet differential receive positive signal, connected to the magnetics/RJ45 port."
      },
      {
        "number": "10",
        "name": "RXN",
        "type": "passive",
        "description": "Ethernet differential receive negative signal, connected to the magnetics/RJ45 port."
      },
      {
        "number": "11",
        "name": "TXP",
        "type": "passive",
        "description": "Ethernet differential transmit positive signal, connected to the magnetics/RJ45 port."
      },
      {
        "number": "12",
        "name": "TXN",
        "type": "passive",
        "description": "Ethernet differential transmit negative signal, connected to the magnetics/RJ45 port."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "Reserved pin; leave floating (no connection)."
      },
      {
        "number": "14",
        "name": "VDD",
        "type": "power_in",
        "description": "3.3 V power supply voltage input."
      },
      {
        "number": "15",
        "name": "INT",
        "type": "output",
        "description": "Interrupt request output to the host MCU, active low."
      },
      {
        "number": "16",
        "name": "ACT",
        "type": "output",
        "description": "Drive pin for the Ethernet activity indicator LED."
      },
      {
        "number": "17",
        "name": "LINK",
        "type": "output",
        "description": "PHY link indicator drive pin, active low."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Chip ground."
      },
      {
        "number": "19",
        "name": "XI",
        "type": "input",
        "description": "Crystal oscillator input; an 8 MHz crystal is required for versions before 0x18, while 8 MHz or 16 MHz is accepted from version 0x18 onward."
      },
      {
        "number": "20",
        "name": "XO",
        "type": "output",
        "description": "Crystal oscillator output (datasheet table lists this pin as output; the description text calls it the input end of the oscillator)."
      }
    ],
    "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 table lists XO as type 输出 (output) but its description reads '晶体振荡的输入端' (crystal oscillator ; The datasheet classifies RXP/RXN/TXP/TXN only as 以太网信号 (Ethernet signal), with no explicit digital d; Crystal requirement depends on chip version: 8 MHz only before version 0x18; 8 MHz or 16 MHz from 0x",
          "1/20 pins cited to the wrong page (name found elsewhere): ['20:XO@p2']"
        ],
        "pages_sent": 28,
        "cost_usd": 0.1545,
        "at": "2026-10-20T23:43:34"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8618867019068420096",
        "pages": 28,
        "sha256": "6e567c4f77a16da0",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ch392t.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ch392t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3748cfb2bf0952e2a7be40f0fcbb5d772fb3d47152d6c7f656594acf0cb6a6de",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}