CH432T

{
  "slug": "ch432t",
  "version": "0.1.0",
  "type": "component",
  "description": "WCH Jiangsu Qin Heng RS232 ICs, SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "ch432t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ch432t.kicad_sym",
    "ch432t.kicad_mod",
    "ch432t.glb",
    "ch432t.step",
    "ch432t.lbr",
    "docs/hero.png",
    "docs/ch432t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ch432t-hero.glb",
    "ch432t-hero.overlay.json",
    "ch432t-etched.glb"
  ],
  "component": {
    "mpn": "CH432T",
    "manufacturer": "WCH Jiangsu Qin Heng",
    "package": "SSOP-20-208mil",
    "pin_count": 20,
    "category": "Interface",
    "subcategory": "RS232 ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588882140188037120",
    "parts": {
      "symbol": "ch432t.kicad_sym",
      "footprint": "ch432t.kicad_mod",
      "model_3d": "ch432t-hero.glb",
      "model_3d_plain": "ch432t-etched.glb",
      "model_3d_step": "ch432t-etched.step",
      "model_3d_step_plain": "ch432t.step",
      "lbr": "ch432t.lbr"
    },
    "distributor_links": {
      "lcsc": "C43011"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T17:37:59Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "INT#",
        "type": "output",
        "description": "Active-low open-drain interrupt request output that is the NOR of the INT0 and INT1 channel interrupts and may need an external pull-up."
      },
      {
        "number": "2",
        "name": "SCS#",
        "type": "input",
        "description": "SPI chip select input, active low, that frames each SPI transaction."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground for the chip."
      },
      {
        "number": "4",
        "name": "TXD",
        "type": "output",
        "description": "Asynchronous serial data output for serial port 0."
      },
      {
        "number": "5",
        "name": "RTS",
        "type": "output",
        "description": "Port 0 request-to-send modem output, active low; in half-duplex mode it indicates the data-sending state, active high."
      },
      {
        "number": "6",
        "name": "RXD",
        "type": "input",
        "description": "Asynchronous serial data input for serial port 0 with an internal weak pull-up."
      },
      {
        "number": "7",
        "name": "RI",
        "type": "input",
        "description": "Port 0 modem ring-indicator input, active low, with an internal weak pull-up."
      },
      {
        "number": "8",
        "name": "CTS",
        "type": "input",
        "description": "Port 0 modem clear-to-send input, active low, with an internal weak pull-up; used for hardware flow control when AFE is set."
      },
      {
        "number": "9",
        "name": "XI",
        "type": "input",
        "description": "Crystal oscillator input, or external clock input when no crystal is fitted; the datasheet gives a range of 0.9216 MHz to 32 MHz with 22.1184 MHz as the default."
      },
      {
        "number": "10",
        "name": "XO",
        "type": "output",
        "description": "Inverting crystal oscillator output that requires a crystal and load capacitor to ground."
      },
      {
        "number": "11",
        "name": "TXD1",
        "type": "output",
        "description": "Asynchronous serial data output for serial port 1."
      },
      {
        "number": "12",
        "name": "HLF#",
        "type": "input",
        "description": "Half-duplex mode enable, active low, with an internal weak pull-up; tie low for half-duplex operation."
      },
      {
        "number": "13",
        "name": "RXD1",
        "type": "input",
        "description": "Asynchronous serial data input for serial port 1 with an internal weak pull-up."
      },
      {
        "number": "14",
        "name": "CTS1",
        "type": "input",
        "description": "Port 1 modem clear-to-send input, active low, with an internal weak pull-up; used for hardware flow control when AFE is set."
      },
      {
        "number": "15",
        "name": "RTS1",
        "type": "output",
        "description": "Port 1 request-to-send modem output, active low; in half-duplex mode it indicates the data-sending state, active high."
      },
      {
        "number": "16",
        "name": "SDO",
        "type": "tri_state",
        "description": "SPI serial data output that is tri-stated and driven only after a read command is received; it may be tied to SDI through a series resistor of a few hundred ohms."
      },
      {
        "number": "17",
        "name": "SDI",
        "type": "input",
        "description": "SPI serial data input, sampled on the SCK rising edge, MSB first."
      },
      {
        "number": "18",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply; the datasheet gives an operating range of 3.3 V to 5.3 V with an absolute maximum of 6.0 V."
      },
      {
        "number": "19",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground for the chip."
      },
      {
        "number": "20",
        "name": "SCK",
        "type": "input",
        "description": "SPI serial clock input; the chip samples data on the rising edge and drives SDO on the falling edge."
      }
    ],
    "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's pin table lists SSOP-20 numbers in parentheses. Pins with no parenthetical number ar; The package hint says 208mil, but the datasheet gives SSOP-20 as 209mil (5.30mm body). The pinout is; INT# is an open-drain output. The KiCad ERC class used here has no open-drain type, so it is typed a",
          "1/20 pins cited to the wrong page (name found elsewhere): ['10:XO@p2']"
        ],
        "pages_sent": 14,
        "cost_usd": 0.0998,
        "at": "2026-10-18T17:37:44"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588882140188037120",
        "pages": 14,
        "sha256": "8d4eacb348ae35b0",
        "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": "ch432t.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          7.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9a01a276d0b4d9561efd58f2fcee56f52c1b6ab464ea7a0380cab4e87a924e6",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ch432t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          7.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4505a86cda42d92bcecea47e7390dc4f5e356ddac70546e44a008b424261d99b",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}