CH9101R

{
  "schema_version": 1,
  "type": "component",
  "slug": "ch9101r",
  "title": "CH9101R",
  "brief": "WCH(Jiangsu Qin Heng) USB Converters, QSOP-16-150mil. 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",
    "ch9101r",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CH9101R",
    "manufacturer": "WCH(Jiangsu Qin Heng)",
    "package": "QSOP-16-150mil",
    "pin_count": 16,
    "category": "Interface",
    "subcategory": "USB Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/e9e91f58a5e334243ecafd4e24b821d8.pdf",
    "parts": {
      "symbol": "ch9101r.kicad_sym",
      "footprint": "ch9101r.kicad_mod",
      "model_3d": "ch9101r-hero.glb",
      "model_3d_plain": "ch9101r-etched.glb",
      "model_3d_step": "ch9101r-etched.step",
      "model_3d_step_plain": "ch9101r.step",
      "lbr": "ch9101r.lbr"
    },
    "distributor_links": {
      "lcsc": "C5187520"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T09:03:20Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "TXD",
        "type": "output",
        "description": "Serial data output of the UART, idle state is high."
      },
      {
        "number": "2",
        "name": "RTS",
        "type": "output",
        "description": "MODEM handshake output, request to send, active low; if an external pull-down is detected on RTS at power-up, the EEPROM configuration is disabled and chip default parameters are used."
      },
      {
        "number": "3",
        "name": "VIO",
        "type": "power_in",
        "description": "I/O port supply input (1.8V to 5V supported) that requires an external decoupling capacitor."
      },
      {
        "number": "4",
        "name": "RXD",
        "type": "input",
        "description": "Serial data input of the UART with internal pull-up resistor, idle state is high."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground, must be connected to the ground line of the USB bus."
      },
      {
        "number": "6",
        "name": "CTS",
        "type": "input",
        "description": "MODEM handshake input, clear to send, active low."
      },
      {
        "number": "7",
        "name": "DSR",
        "type": "input",
        "description": "MODEM handshake input, data set ready, active low; default function is TXS, switchable to DSR via EEPROM configuration."
      },
      {
        "number": "8",
        "name": "UD+",
        "type": "bidirectional",
        "description": "USB D+ data line connected directly to the USB bus, no series resistor allowed."
      },
      {
        "number": "9",
        "name": "UD-",
        "type": "bidirectional",
        "description": "USB D- data line connected directly to the USB bus, no series resistor allowed."
      },
      {
        "number": "10",
        "name": "V3",
        "type": "power_in",
        "description": "Internal regulator output and core/USB supply input; connect to VDD5 when VDD5 is below 3.6V, or use an external decoupling capacitor (about 0.1uF) when VDD5 is above 3.6V."
      },
      {
        "number": "11",
        "name": "RESET#",
        "type": "input",
        "description": "External reset input, active low, with internal pull-up resistor."
      },
      {
        "number": "12",
        "name": "VDD5",
        "type": "power_in",
        "description": "Positive supply input of the power regulator (4.0V to 5.5V typical, or 3.0V to 3.6V when tied to V3), requires an external decoupling capacitor."
      },
      {
        "number": "13",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground, must be connected to the ground line of the USB bus."
      },
      {
        "number": "14",
        "name": "RI",
        "type": "input",
        "description": "MODEM handshake input, ring indicator, active low; default function is RXS, switchable to RI via EEPROM configuration."
      },
      {
        "number": "15",
        "name": "DCD",
        "type": "input",
        "description": "MODEM handshake input, carrier detect, active low; default function is TNOW, switchable to DCD via EEPROM configuration."
      },
      {
        "number": "16",
        "name": "DTR",
        "type": "output",
        "description": "MODEM handshake output, data terminal ready, active low; default function is SUSPEND, switchable to DTR via EEPROM configuration."
      }
    ],
    "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: V3 is both the internal regulator output and the core/USB supply input; no exact KiCad class given, ; Pin table is flattened text with five package columns (U/H/Y/R/N); CH9101R column (4th) was used. VD; Default alternate functions (TXS, RXS, TNOW, SUSPEND) are outputs on DSR/RI/DCD/DTR pins by default;"
        ],
        "pages_sent": 11,
        "cost_usd": 0.118,
        "at": "2026-10-23T09:02:58"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/e9e91f58a5e334243ecafd4e24b821d8.pdf",
        "pages": 11,
        "sha256": "bf63e9605a1cf908",
        "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": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.42
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "14e9adcd9b6d1d5b282a866123ac59b68abf20b62a41cc9cecabd5c819d8f17d",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "WCH(Jiangsu Qin Heng)",
      "Package": "QSOP-16-150mil",
      "Category": "Interface",
      "Pins": "16"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "bf63e9605a1cf908a956cb1b76efd54f39254c4561458022ae585abac02144a4",
      "rows": [
        {
          "name": "USB supply voltage, V3 not tied to VDD5",
          "symbol": "VDD5",
          "kind": "electrical",
          "unit": "V",
          "min": 4,
          "typ": 5,
          "max": 5.5,
          "conditions": "V3 pin not connected to VDD5, V3 with capacitor",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "USB supply voltage, V3 tied to VDD5",
          "symbol": "VDD5",
          "kind": "electrical",
          "unit": "V",
          "min": 3,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "V3 pin connected to VDD5, VDD5 = V3",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "I/O supply voltage",
          "symbol": "VIO",
          "kind": "electrical",
          "unit": "V",
          "min": 1.7,
          "typ": 5,
          "max": 5.5,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Operating supply current",
          "symbol": "IVDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3,
          "max": 15,
          "conditions": "VDD5 or V3 supply current in operation",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "VIO operating supply current",
          "symbol": "IVIO",
          "kind": "electrical",
          "unit": "mA",
          "min": 0,
          "typ": null,
          "max": 10,
          "conditions": "depends on I/O load",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Suspend supply current VDD5",
          "symbol": "ISLP",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.09,
          "max": 0.16,
          "conditions": "USB suspend, VDD5 = 5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Suspend supply current VDD5=V3",
          "symbol": "ISLP",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.085,
          "max": 0.15,
          "conditions": "USB suspend, VDD5 = V3 = 3.3V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Suspend supply current VIO",
          "symbol": "ISLP",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.002,
          "max": 0.05,
          "conditions": "USB suspend, VIO supply, no I/O load/pull-up",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Internal regulator external load capability",
          "symbol": "ILDO",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Low-level input voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 1.5,
          "conditions": "VIO = 5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Low-level input voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 0.9,
          "conditions": "VIO = 3.3V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Low-level input voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 0.5,
          "conditions": "VIO = 1.8V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "High-level input voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": null,
          "conditions": "VIO = 5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "High-level input voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.9,
          "typ": null,
          "max": null,
          "conditions": "VIO = 3.3V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "High-level input voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.3,
          "typ": null,
          "max": null,
          "conditions": "VIO = 1.8V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.4,
          "max": 0.5,
          "conditions": "VIO = 5V, sink 15mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.3,
          "max": 0.4,
          "conditions": "VIO = 3.3V, sink 8mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Pull-up current",
          "symbol": "IPUP",
          "kind": "electrical",
          "unit": "uA",
          "min": 35,
          "typ": 150,
          "max": 220,
          "conditions": "VIO = 5V, pulled up to VIO",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Pull-up current",
          "symbol": "IPUP",
          "kind": "electrical",
          "unit": "uA",
          "min": 15,
          "typ": 60,
          "max": 90,
          "conditions": "VIO = 3.3V, pulled up to VIO",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Pull-up current",
          "symbol": "IPUP",
          "kind": "electrical",
          "unit": "uA",
          "min": 3,
          "typ": 14,
          "max": 21,
          "conditions": "VIO = 1.8V, pulled up to VIO",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "V3 power-on reset/low-voltage reset threshold",
          "symbol": "VRV3",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": 2.7,
          "max": 2.9,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "HBM ESD withstand voltage",
          "symbol": "VESD",
          "kind": "electrical",
          "unit": "KV",
          "min": 5,
          "typ": 6,
          "max": null,
          "conditions": "USB or I/O pins",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Internal clock error",
          "symbol": "FD",
          "kind": "timing",
          "unit": "%",
          "min": -1,
          "typ": 0.5,
          "max": 1,
          "conditions": "TA = -15℃～60℃",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Internal clock error",
          "symbol": "FD",
          "kind": "timing",
          "unit": "%",
          "min": -1.6,
          "typ": 0.8,
          "max": 1.6,
          "conditions": "TA = -40℃～85℃",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Reset delay after power-up or external reset",
          "symbol": "TRSTD",
          "kind": "timing",
          "unit": "mS",
          "min": 9,
          "typ": 15,
          "max": 25,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "RESET external input valid pulse width",
          "symbol": "TRI",
          "kind": "timing",
          "unit": "nS",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "USB auto-suspend detection time",
          "symbol": "TSUSP",
          "kind": "timing",
          "unit": "mS",
          "min": 3,
          "typ": 5,
          "max": 9,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Wake-up completion time after sleep",
          "symbol": "TWAKE",
          "kind": "timing",
          "unit": "uS",
          "min": 1.2,
          "typ": 1.5,
          "max": 5,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Storage ambient temperature",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "USB supply voltage",
          "symbol": "VDD5",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 6,
          "conditions": "VDD5 pin supply, GND grounded",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Serial I/O supply voltage",
          "symbol": "VIO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 6,
          "conditions": "VIO pin supply, GND grounded",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Voltage on USB signal pins",
          "symbol": "VUSB",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "max is V3+0.5",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Voltage on UART and other pins",
          "symbol": "VUART",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "max is VIO+0.5",
          "source_page": 6,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_pitch": "CH9101R (WCH(Jiangsu Qin Heng)) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray"
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