CH9328

{
  "slug": "ch9328",
  "version": "0.1.0",
  "type": "component",
  "description": "WCH(Jiangsu Qin Heng) USB ICs, SOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface ics",
    "ch9328",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ch9328.kicad_sym",
    "ch9328.kicad_mod",
    "ch9328.glb",
    "ch9328.step",
    "ch9328.lbr",
    "docs/hero.png",
    "docs/ch9328-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ch9328-hero.glb",
    "ch9328-hero.overlay.json",
    "ch9328-etched.glb"
  ],
  "component": {
    "mpn": "CH9328",
    "manufacturer": "WCH(Jiangsu Qin Heng)",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Interface ICs",
    "subcategory": "USB ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/dc1d23e4555441cc5fcfcae0a07deaae.pdf",
    "parts": {
      "symbol": "ch9328.kicad_sym",
      "footprint": "ch9328.kicad_mod",
      "model_3d": "ch9328-hero.glb",
      "model_3d_plain": "ch9328-etched.glb",
      "model_3d_step": "ch9328-etched.step",
      "model_3d_step_plain": "ch9328.step",
      "lbr": "ch9328.lbr"
    },
    "distributor_links": {
      "lcsc": "C82452"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T22:42:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 942 calls left today"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RSTI",
        "type": "input",
        "description": "External reset input, active low, with built-in pull-up resistor."
      },
      {
        "number": "2",
        "name": "TXD",
        "type": "output",
        "description": "Invalid pin, not actually used."
      },
      {
        "number": "3",
        "name": "RXD",
        "type": "input",
        "description": "Serial data input with built-in pull-up resistor."
      },
      {
        "number": "4",
        "name": "T_LED",
        "type": "output",
        "description": "Serial UART send status output, active high."
      },
      {
        "number": "5",
        "name": "V3",
        "type": "power_in",
        "description": "Connect to VCC when VCC is 3V3, connect to a 0.1uF decoupling capacitor when VCC is 5V."
      },
      {
        "number": "6",
        "name": "UD+",
        "type": "bidirectional",
        "description": "Connect directly to USB D+ signal."
      },
      {
        "number": "7",
        "name": "UD-",
        "type": "bidirectional",
        "description": "Connect directly to USB D- signal."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "9",
        "name": "XI",
        "type": "input",
        "description": "Crystal oscillator input requiring external crystal and capacitor for chips below V1.4; left suspended for V1.4 and above with integrated oscillator."
      },
      {
        "number": "10",
        "name": "XO",
        "type": "output",
        "description": "Crystal oscillator inverted output requiring external crystal and capacitor for chips below V1.4; left suspended for V1.4 and above with integrated oscillator."
      },
      {
        "number": "11",
        "name": "IO2",
        "type": "bidirectional",
        "description": "User-configurable pin and operating mode configuration pin, level detected after power-on, configurable as GPIO after USB configuration."
      },
      {
        "number": "12",
        "name": "IO1",
        "type": "bidirectional",
        "description": "User-configurable pin and speed configuration pin; high at power-on gives normal speed mode, otherwise high speed mode (about twice normal speed); configurable as GPIO after USB configuration."
      },
      {
        "number": "13",
        "name": "IO4",
        "type": "bidirectional",
        "description": "User-configurable pin and operating mode configuration pin, level detected after power-on, configurable as GPIO after USB configuration."
      },
      {
        "number": "14",
        "name": "IO3",
        "type": "bidirectional",
        "description": "User-configurable pin and operating mode configuration pin, level detected after power-on, configurable as GPIO after USB configuration."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply voltage input (3.0V to 5.3V), requires an external 0.1uF decoupling capacitor."
      },
      {
        "number": "16",
        "name": "ACT#",
        "type": "output",
        "description": "USB configuration completed status output, active low."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet pin type for TXD is 'Output' but described as invalid/unused; UD+/UD- typed as bidirection; Datasheet lists RSTI as built-in pull-up in pin table but electrical table says pull-down; inconsist"
        ],
        "pages_sent": 6,
        "cost_usd": 0.0713,
        "at": "2026-10-22T22:42:07"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/dc1d23e4555441cc5fcfcae0a07deaae.pdf",
        "pages": 6,
        "sha256": "afe1d515c815d37e",
        "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": "ch9328.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": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ch9328-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": "45354280799fe53354da98c51fd3fe06408cbcf5599ff39a0d507e671dbae5a0",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}