SI4063-C2A-GMR

{
  "slug": "si4063-c2a-gmr",
  "version": "0.1.0",
  "type": "component",
  "description": "SILICON LABS RF Transceiver ICs, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "radio frequency chip-antenna",
    "si4063-c2a-gmr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "si4063-c2a-gmr.kicad_sym",
    "si4063-c2a-gmr.kicad_mod",
    "si4063-c2a-gmr.glb",
    "si4063-c2a-gmr.step",
    "si4063-c2a-gmr.lbr",
    "docs/hero.png",
    "docs/si4063-c2a-gmr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "si4063-c2a-gmr-hero.glb",
    "si4063-c2a-gmr-hero.overlay.json",
    "si4063-c2a-gmr-etched.glb"
  ],
  "component": {
    "mpn": "SI4063-C2A-GMR",
    "manufacturer": "SILICON LABS",
    "package": "QFN-20-EP(4x4)",
    "pin_count": 21,
    "category": "Radio Frequency Chip/Antenna",
    "subcategory": "RF Transceiver ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/40948801898b475897e5f90973bda4e1.pdf",
    "parts": {
      "symbol": "si4063-c2a-gmr.kicad_sym",
      "footprint": "si4063-c2a-gmr.kicad_mod",
      "model_3d": "si4063-c2a-gmr-hero.glb",
      "model_3d_plain": "si4063-c2a-gmr-etched.glb",
      "model_3d_step": "si4063-c2a-gmr-etched.step",
      "model_3d_step_plain": "si4063-c2a-gmr.step",
      "lbr": "si4063-c2a-gmr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2654773",
      "digikey": "336-4478-2-ND",
      "mouser": "634-SI4063-C2A-GMR"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T15:48:45Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "336-4478-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "634-SI4063-C2A-GMR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SDN",
        "type": "input",
        "description": "Shutdown input, 0 to VDD V digital; SDN must be 0 in all modes except Shutdown, and SDN = 1 fully shuts the chip down and loses register contents."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "Leave pin floating."
      },
      {
        "number": "3",
        "name": "NC",
        "type": "unconnected",
        "description": "Leave pin floating."
      },
      {
        "number": "4",
        "name": "TX",
        "type": "output",
        "description": "Transmit output on an open-drain PA connection, so the L-C match must supply VDD (+3.3 VDC nominal) to this pin."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "Recommended to connect to GND per the reference design schematic; not connected internally to any circuitry."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage input to internal regulators, +1.8 to +3.8 V, with a recommended supply of +3.3 V."
      },
      {
        "number": "7",
        "name": "TXRAMP",
        "type": "output",
        "description": "Programmable bias output with ramp capability for an external FET PA."
      },
      {
        "number": "8",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage input to internal regulators, +1.8 to +3.8 V, with a recommended supply of +3.3 V."
      },
      {
        "number": "9",
        "name": "GPIO0",
        "type": "bidirectional",
        "description": "General purpose digital I/O that can be configured through registers for functions such as microcontroller clock output, FIFO status, POR, wake-up timer, and low battery detect."
      },
      {
        "number": "10",
        "name": "GPIO1",
        "type": "bidirectional",
        "description": "General purpose digital I/O; the datasheet gives no pin-specific description for this pin."
      },
      {
        "number": "11",
        "name": "nIRQ",
        "type": "output",
        "description": "General microcontroller interrupt status output that goes low when an interrupt event occurs; no external pull-up is required, though one may be desirable if multiple interrupt lines are connected."
      },
      {
        "number": "12",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock input, 0 to VDD V digital, clocking data into the device on positive edge transitions of the 4-line serial bus."
      },
      {
        "number": "13",
        "name": "SDO",
        "type": "output",
        "description": "Serial data readback output, 0 to VDD V digital, providing readback of the internal control registers."
      },
      {
        "number": "14",
        "name": "SDI",
        "type": "input",
        "description": "Serial data input, 0 to VDD V digital, providing the serial data stream for the 4-line serial bus."
      },
      {
        "number": "15",
        "name": "nSEL",
        "type": "input",
        "description": "Serial interface select input, 0 to VDD V digital, providing the select/enable function for the 4-line serial bus."
      },
      {
        "number": "16",
        "name": "XOUT",
        "type": "output",
        "description": "Crystal oscillator output; connect to an external 25 to 32 MHz crystal, or leave floating when driving with an external source on XIN."
      },
      {
        "number": "17",
        "name": "XIN",
        "type": "input",
        "description": "Crystal oscillator input; connect to an external 25 to 32 MHz crystal or to an external source."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; leave floating per the reference design when using an XTAL, or connect to TCXO GND (separate from the board reference ground plane) when using a TCXO."
      },
      {
        "number": "19",
        "name": "GPIO2",
        "type": "bidirectional",
        "description": "General purpose digital I/O that can be configured through registers for functions such as microcontroller clock output, FIFO status, POR, wake-up timer, and low battery detect."
      },
      {
        "number": "20",
        "name": "GPIO3",
        "type": "bidirectional",
        "description": "General purpose digital I/O that can be configured through registers for various functions."
      },
      {
        "number": "21",
        "name": "PADDLE_GND",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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: Pin 10 (GPIO1) is listed as I/O in the pin table on page 29 with no description text, so its descrip",
          "1/21 pins cited to the wrong page (name found elsewhere): ['17:XIN@p30']"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0225,
        "at": "2026-10-28T15:48:26"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/40948801898b475897e5f90973bda4e1.pdf",
        "pages": 37,
        "sha256": "6c2f75f5b458d69f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "si4063-c2a-gmr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "si4063-c2a-gmr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "5cdf582870b7b1d02259e8cd32669dc8d9bb050cd5ea86876a73b49e74fcd36c",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}