CP2103-GMR

{
  "schema_version": 1,
  "type": "component",
  "slug": "cp2103-gmr",
  "title": "CP2103-GMR",
  "brief": "SKYWORKS SILICON LABS USB Converters, QFN-28-EP(5x5). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "cp2103-gmr"
  ],
  "component": {
    "mpn": "CP2103-GMR",
    "manufacturer": "SKYWORKS SILICON LABS",
    "package": "QFN-28-EP(5x5)",
    "pin_count": 29,
    "category": "Interface",
    "subcategory": "USB Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/1cfe3afc2e6a0f46f7ed178f6503b4e7.pdf",
    "parts": {
      "symbol": "cp2103-gmr.kicad_sym",
      "footprint": "cp2103-gmr.kicad_mod",
      "model_3d": "cp2103-gmr-etched.glb",
      "model_3d_plain": "cp2103-gmr.glb",
      "model_3d_step": "cp2103-gmr-etched.step",
      "model_3d_step_plain": "cp2103-gmr.step",
      "lbr": "cp2103-gmr.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "RI",
        "type": "input",
        "description": "Ring Indicator modem control input (active low). Marked as optional - may be left unconnected when not used."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground. Must be tied to ground."
      },
      {
        "number": "3",
        "name": "D+",
        "type": "bidirectional",
        "description": "USB D+ differential data line. Connect directly to USB connector D+ (no external series resistor required)."
      },
      {
        "number": "4",
        "name": "D-",
        "type": "bidirectional",
        "description": "USB D- differential data line. Connect directly to USB connector D- (no external series resistor required)."
      },
      {
        "number": "5",
        "name": "VIO",
        "type": "power_in",
        "description": "I/O supply voltage input, 1.8 V to VDD. Sets the logic level for UART, GPIO, and control I/O so the CP2103 can interface to sub-3.3 V hosts. Tie to VDD if a separate I/O rail is not required."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "3.0-3.6 V core supply. Also serves as the output of the on-chip 3.3 V regulator when REGIN is driven from a 5 V source (see Section 9, Voltage Regulator)."
      },
      {
        "number": "7",
        "name": "REGIN",
        "type": "power_in",
        "description": "5 V input to the internal LDO. Tie to VBUS when running from USB bus power; leave unconnected (or tie to VDD) in self-powered operation."
      },
      {
        "number": "8",
        "name": "VBUS",
        "type": "input",
        "description": "VBUS sense input. Connect to the USB VBUS rail; a 5 V level indicates the device is attached to a USB host."
      },
      {
        "number": "9",
        "name": "RST",
        "type": "bidirectional",
        "description": "Active-low device reset. Open-drain output of the internal power-on-reset / VDD monitor; an external source may pull this pin low for at least 15 µs to initiate a system reset."
      },
      {
        "number": "10",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave unconnected or tie to VDD."
      },
      {
        "number": "11",
        "name": "SUSPEND",
        "type": "output",
        "description": "Active-low suspend indicator. Driven low when the CP2103 enters the USB suspend state. Marked optional - may be left unconnected when not used."
      },
      {
        "number": "12",
        "name": "SUSPEND",
        "type": "output",
        "description": "Active-high suspend indicator. Driven high when the CP2103 enters the USB suspend state. Marked optional - may be left unconnected when not used."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave unconnected or tie to VDD."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave unconnected or tie to VDD."
      },
      {
        "number": "15",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave unconnected or tie to VDD."
      },
      {
        "number": "16",
        "name": "GPIO.3",
        "type": "bidirectional",
        "description": "User-configurable digital I/O. Alternate functions (e.g., RS-485 transceiver enable, status LEDs, hardware suspend flag) are assigned via the on-chip EEPROM."
      },
      {
        "number": "17",
        "name": "GPIO.2",
        "type": "bidirectional",
        "description": "User-configurable digital I/O. Alternate functions (e.g., RS-485 transceiver enable, status LEDs) are assigned via the on-chip EEPROM."
      },
      {
        "number": "18",
        "name": "GPIO.1",
        "type": "bidirectional",
        "description": "User-configurable digital I/O. Alternate functions (e.g., RS-485 transceiver enable, status LEDs) are assigned via the on-chip EEPROM."
      },
      {
        "number": "19",
        "name": "GPIO.0",
        "type": "bidirectional",
        "description": "User-configurable digital I/O. Alternate functions (e.g., RS-485 transceiver enable, status LEDs) are assigned via the on-chip EEPROM."
      },
      {
        "number": "20",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave unconnected or tie to VDD."
      },
      {
        "number": "21",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave unconnected or tie to VDD."
      },
      {
        "number": "22",
        "name": "CTS",
        "type": "input",
        "description": "Clear-To-Send modem control input (active low). Marked optional - may be left unconnected when hardware handshaking is not used."
      },
      {
        "number": "23",
        "name": "RTS",
        "type": "output",
        "description": "Request-To-Send modem control output (active low). Marked optional - may be left unconnected when hardware handshaking is not used."
      },
      {
        "number": "24",
        "name": "RXD",
        "type": "input",
        "description": "Asynchronous UART receive data input."
      },
      {
        "number": "25",
        "name": "TXD",
        "type": "output",
        "description": "Asynchronous UART transmit data output."
      },
      {
        "number": "26",
        "name": "DSR",
        "type": "input",
        "description": "Data-Set-Ready modem control input (active low). Marked optional - may be left unconnected when not used."
      },
      {
        "number": "27",
        "name": "DTR",
        "type": "output",
        "description": "Data-Terminal-Ready modem control output (active low). Marked optional - may be left unconnected when not used."
      },
      {
        "number": "28",
        "name": "DCD",
        "type": "input",
        "description": "Data-Carrier-Detect modem control input (active low). Marked optional - may be left unconnected when not used."
      },
      {
        "number": "EP",
        "name": "SGND",
        "type": "power_in",
        "description": "Signal ground / exposed center pad of the QFN-28 package. Must be soldered to the PCB ground plane for both electrical ground return and thermal dissipation."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/1cfe3afc2e6a0f46f7ed178f6503b4e7.pdf",
        "pages": 20,
        "sha256": "1b1ae8e977966c33",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 29,
        "described": 29,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "SKYWORKS SILICON LABS",
      "Package": "QFN-28-EP(5x5)",
      "Category": "Interface",
      "Pins": "29"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "cp2103-gmr"
  ],
  "discovery_pitch": "CP2103-GMR (SKYWORKS SILICON LABS) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cp2103-gmr.kicad_sym",
    "cp2103-gmr.kicad_mod",
    "cp2103-gmr.glb",
    "cp2103-gmr.step",
    "cp2103-gmr-etched.step",
    "cp2103-gmr.lbr",
    "docs/hero.png",
    "docs/cp2103-gmr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "CP2103-GMR",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T19:31:42.960Z"
}