CH9329

{
  "schema_version": 1,
  "type": "component",
  "slug": "ch9329",
  "title": "CH9329",
  "brief": "WCH Jiangsu Qin Heng USB Converters, SOP-16. 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",
    "interface",
    "ch9329",
    "factory-2.0.0",
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  "component": {
    "mpn": "CH9329",
    "manufacturer": "WCH Jiangsu Qin Heng",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Interface",
    "subcategory": "USB Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8618867901160046592",
    "parts": {
      "symbol": "ch9329.kicad_sym",
      "footprint": "ch9329.kicad_mod",
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      "model_3d_plain": "ch9329-etched.glb",
      "model_3d_step": "ch9329-etched.step",
      "model_3d_step_plain": "ch9329.step",
      "lbr": "ch9329.lbr"
    },
    "distributor_links": {
      "lcsc": "C2838834"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T23:02:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "ACT#",
        "type": "output",
        "description": "USB configuration-complete status output, active low, indicating the chip has been successfully connected to the computer."
      },
      {
        "number": "2",
        "name": "MODE0",
        "type": "input",
        "description": "Work-mode configuration pin 0, used together with MODE1 and sampled at power-up, with an internal pull-up; if left floating the chip defaults to work mode 0."
      },
      {
        "number": "3",
        "name": "MODE1",
        "type": "input",
        "description": "Work-mode configuration pin 1, used together with MODE0 and sampled at power-up, with an internal pull-up."
      },
      {
        "number": "4",
        "name": "CFG0",
        "type": "input",
        "description": "Serial communication mode configuration pin 0, used together with CFG1 and sampled at power-up, with an internal pull-up; if left floating the chip defaults to serial mode 0."
      },
      {
        "number": "5",
        "name": "CFG1",
        "type": "input",
        "description": "Serial communication mode configuration pin 1, used together with CFG0 and sampled at power-up, with an internal pull-up."
      },
      {
        "number": "6",
        "name": "RST",
        "type": "input",
        "description": "External reset input, active high, with an internal pull-down resistor."
      },
      {
        "number": "7",
        "name": "TXD",
        "type": "output",
        "description": "Serial data output."
      },
      {
        "number": "8",
        "name": "RXD",
        "type": "input",
        "description": "Serial data input with an internal pull-up resistor."
      },
      {
        "number": "9",
        "name": "UP",
        "type": "bidirectional",
        "description": "USB packet upload indicator whose level toggles once for each successfully uploaded packet; when operating at 3.3 V a 4.7 kΩ pull-down resistor to GND must be fitted on this pin."
      },
      {
        "number": "10",
        "name": "DEF",
        "type": "input",
        "description": "Factory-reset input: holding it low for more than 3 s restores all parameters to factory defaults; internal pull-up."
      },
      {
        "number": "11",
        "name": "SET",
        "type": "input",
        "description": "Parameter configuration input, active low, with an internal pull-up; when low in any mode the chip switches to protocol transmission mode so the serial host can configure it."
      },
      {
        "number": "12",
        "name": "UD+",
        "type": "bidirectional",
        "description": "USB D+ data line connected directly to the USB bus; no series resistor may be added."
      },
      {
        "number": "13",
        "name": "UD-",
        "type": "bidirectional",
        "description": "USB D- data line connected directly to the USB bus; no series resistor may be added."
      },
      {
        "number": "14",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground, connected directly to the USB bus ground."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply input that requires an external 0.1 µF decoupling capacitor; absolute maximum rating is -0.4 V to 5.5 V."
      },
      {
        "number": "16",
        "name": "V33",
        "type": "power_in",
        "description": "Output of the internal USB power regulator and input to the internal USB power supply: at 3.3 V operation connect the external supply to VCC and tie V33 to VCC, while at 5 V operation decouple V33 with a 0.1 µF capacitor."
      }
    ],
    "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 describes V33 as both the internal USB regulator output and the internal USB power inp; The 4.7 kΩ pull-down on UP for 3.3 V operation is taken from a note that spans pages 2 and 3; the da; The SOP16 column in the pin table lists RST on pin 6 and ACT# on pin 1; the CH9329F-only pins (RESET"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0667,
        "at": "2026-10-17T23:00:43"
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        "pages": 11,
        "sha256": "8622bc0e39b03416",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "WCH Jiangsu Qin Heng",
      "Package": "SOP-16",
      "Category": "Interface",
      "Pins": "16"
    },
    "characteristics": {
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          "name": "Operating ambient temperature",
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          "name": "Storage ambient temperature",
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          "unit": "℃",
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        {
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          "symbol": "VIO",
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          "typ": 5,
          "max": 5.5,
          "conditions": "CH9329, TA = 25℃, VCC = 5V, excluding USB pins",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Internal USB regulator output voltage",
          "symbol": "V33",
          "kind": "electrical",
          "unit": "V",
          "min": 3.14,
          "typ": 3.27,
          "max": 3.4,
          "conditions": "CH9329, TA = 25℃, VCC = 5V, excluding USB pins",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Static supply current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": 8,
          "typ": null,
          "max": 11,
          "conditions": "CH9329, TA = 25℃, VCC = 5V, excluding USB pins",
          "source_page": 8,
          "source": "datasheet"
        },
        {
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          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": 1.2,
          "conditions": "CH9329, TA = 25℃, VCC = 5V, excluding USB pins",
          "source_page": 8,
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        },
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          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.4,
          "typ": null,
          "max": null,
          "conditions": "CH9329, TA = 25℃, VCC = 5V, excluding USB pins",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Output low voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "CH9329, TA = 25℃, VCC = 5V, excluding USB pins; single pin sinking 8 mA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Built-in pull-up input current",
          "symbol": "IUP",
          "kind": "electrical",
          "unit": "uA",
          "min": 35,
          "typ": 70,
          "max": 140,
          "conditions": "CH9329, TA = 25℃, VCC = 5V, excluding USB pins",
          "source_page": 8,
          "source": "datasheet"
        },
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          "symbol": "IDN",
          "kind": "electrical",
          "unit": "uA",
          "min": -35,
          "typ": -70,
          "max": -140,
          "conditions": "CH9329, TA = 25℃, VCC = 5V, excluding USB pins",
          "source_page": 8,
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        },
        {
          "name": "Power-on reset voltage threshold",
          "symbol": "VPOR",
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          "unit": "V",
          "min": 2.1,
          "typ": 2.3,
          "max": 2.5,
          "conditions": "CH9329, TA = 25℃, VCC = 5V, excluding USB pins",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage",
          "symbol": "VCC",
          "kind": "electrical",
          "unit": "V",
          "min": 3,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "CH9329, TA = 25℃, VCC = V33 = 3.3V, excluding USB pins",
          "source_page": 8,
          "source": "datasheet"
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          "unit": "mA",
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          "conditions": "CH9329, TA = 25℃, VCC = V33 = 3.3V, excluding USB pins",
          "source_page": 8,
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          "symbol": "VIL",
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          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": 0.8,
          "conditions": "CH9329, TA = 25℃, VCC = V33 = 3.3V, excluding USB pins",
          "source_page": 8,
          "source": "datasheet"
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        {
          "name": "High-level input voltage",
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          "min": 1.9,
          "typ": null,
          "max": null,
          "conditions": "CH9329, TA = 25℃, VCC = V33 = 3.3V, excluding USB pins",
          "source_page": 8,
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          "min": 15,
          "typ": 30,
          "max": 60,
          "conditions": "CH9329, TA = 25℃, VCC = V33 = 3.3V, excluding USB pins",
          "source_page": 8,
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          "unit": "uA",
          "min": -15,
          "typ": -30,
          "max": -60,
          "conditions": "CH9329, TA = 25℃, VCC = V33 = 3.3V, excluding USB pins",
          "source_page": 8,
          "source": "datasheet"
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      ]
    }
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  "author": {
    "name": "Ray",
    "email": "[email protected]"
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