CP2102

{
  "schema_version": 1,
  "type": "component",
  "slug": "cp2102",
  "title": "CP2102",
  "brief": "Silicon Labs single-chip USB-to-UART bridge, QFN-28. Integrated USB, regulator, clock, EEPROM. Up to 1 Mbps. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "usb-uart",
    "usb-bridge",
    "virtual-com-port",
    "qfn-28",
    "silicon-labs"
  ],
  "component": {
    "mpn": "CP2102",
    "manufacturer": "Silicon Labs",
    "package": "QFN-28",
    "pin_count": 28,
    "category": "Interface IC",
    "subcategory": "USB-to-UART bridge",
    "datasheet": "https://www.silabs.com/documents/public/data-sheets/CP2102-9.pdf",
    "parts": {
      "symbol": "cp2102.kicad_sym",
      "footprint": "cp2102.kicad_mod",
      "model_3d": "cp2102-etched.glb",
      "model_3d_plain": "cp2102.glb",
      "lbr": "cp2102.lbr",
      "model_3d_step": "cp2102-etched.step",
      "model_3d_step_plain": "cp2102.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "DCD",
        "type": "input",
        "description": "Data Carrier Detect control input (active low). RS-232 modem control input; can be left unconnected when not used."
      },
      {
        "number": "2",
        "name": "RI",
        "type": "input",
        "description": "Ring Indicator control input (active low). RS-232 modem control input; can be left unconnected when not used."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference. Also connect the exposed center pad of the QFN-28 to GND."
      },
      {
        "number": "4",
        "name": "D+",
        "type": "bidirectional",
        "description": "USB D+ data line. Connects directly to the USB connector D+ pin; integrated 1.5 kΩ pull-up for full-speed enumeration."
      },
      {
        "number": "5",
        "name": "D-",
        "type": "bidirectional",
        "description": "USB D- data line. Connects directly to the USB connector D- pin."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "3.0-3.6 V power supply input and 3.3 V voltage regulator output. When the on-chip regulator is used (REGIN from VBUS), VDD is driven by the regulator and requires a 4.7 µF + 0.1 µF decoupling capacitor to GND."
      },
      {
        "number": "7",
        "name": "REGIN",
        "type": "power_in",
        "description": "5 V input to the on-chip voltage regulator (typ. 4.0-5.25 V). Requires a 1.0 µF + 0.1 µF decoupling capacitor to GND."
      },
      {
        "number": "8",
        "name": "VBUS",
        "type": "input",
        "description": "VBUS sense input. Connect to the VBUS signal of the USB network; a 5 V level indicates a USB connection. Detection threshold typ. 1.8 V."
      },
      {
        "number": "9",
        "name": "RST",
        "type": "bidirectional",
        "description": "Device reset (active low). Open-drain output of the internal POR/VDD monitor; an external source can initiate a system reset by driving this pin low for at least 15 µs."
      },
      {
        "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 CP2102/9 enters the USB suspend state (inverse of SUSPEND). Floats high momentarily during reset; a 10 kΩ pulldown to GND is recommended to hold it low on power-up."
      },
      {
        "number": "12",
        "name": "SUSPEND",
        "type": "output",
        "description": "Active-high suspend indicator. Driven high when the CP2102/9 enters the USB suspend state."
      },
      {
        "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": "NC",
        "type": "unconnected",
        "description": "No connect. Leave unconnected or tie to VDD."
      },
      {
        "number": "17",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave unconnected or tie to VDD."
      },
      {
        "number": "18",
        "name": "NC",
        "type": "unconnected",
        "description": "Unused on the CP2102 - leave unconnected or tie to VDD. (On the pin-compatible CP2109, this pin is VPP, the EPROM programming supply; a 4.7 µF cap to GND maintains board compatibility.)"
      },
      {
        "number": "19",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave unconnected or tie to VDD."
      },
      {
        "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": "NC",
        "type": "unconnected",
        "description": "No connect. Leave unconnected or tie to VDD."
      },
      {
        "number": "23",
        "name": "CTS",
        "type": "input",
        "description": "Clear To Send control input (active low). RS-232 handshake input; can be left unconnected when not used."
      },
      {
        "number": "24",
        "name": "RTS",
        "type": "output",
        "description": "Request To Send control output (active low). RS-232 handshake output; can be left unconnected when not used."
      },
      {
        "number": "25",
        "name": "RXD",
        "type": "input",
        "description": "Asynchronous UART receive data input."
      },
      {
        "number": "26",
        "name": "TXD",
        "type": "output",
        "description": "Asynchronous UART transmit data output. Baud rates from 300 bps up to 921600 bps (1 Mbps peak)."
      },
      {
        "number": "27",
        "name": "DSR",
        "type": "input",
        "description": "Data Set Ready control input (active low). RS-232 modem control input; can be left unconnected when not used."
      },
      {
        "number": "28",
        "name": "DTR",
        "type": "output",
        "description": "Data Terminal Ready control output (active low). RS-232 modem control output; can be left unconnected when not used."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.silabs.com/documents/public/data-sheets/CP2102-9.pdf",
        "pages": 26,
        "sha256": "f025d9c738e49065",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 28,
        "described": 28,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    }
  },
  "metadata": {
    "specs": {
      "Type": "USB 2.0-to-UART bridge",
      "USB": "full-speed (virtual COM port)",
      "Max UART rate": "1 Mbps",
      "Integrated": "USB PHY + regulator + clock + 1 KB EEPROM",
      "Modem control": "RTS/CTS/DSR/DTR/DCD/RI",
      "External parts": "2 capacitors",
      "Supply voltage": "USB 5 V or 3.3 V",
      "Package": "QFN-28 (5x5 mm)"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "cp2102",
    "usb to uart",
    "usb serial bridge",
    "virtual com port",
    "usb ttl"
  ],
  "discovery_pitch": "CP2102 single-chip USB-to-UART bridge (QFN-28) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cp2102.kicad_sym",
    "cp2102.kicad_mod",
    "cp2102.glb",
    "cp2102.lbr",
    "docs/hero.png",
    "docs/cp2102-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cp2102-etched.step"
  ],
  "variants": [
    {
      "mpn": "CP2102-GMR (QFN-28)",
      "kind": "packaging"
    },
    {
      "mpn": "CP2102-GM (QFN-28)",
      "kind": "packaging"
    }
  ]
}