C8051F321-GMR

{
  "slug": "c8051f321-gmr",
  "version": "0.1.0",
  "type": "component",
  "description": "SILICON LABS SILICON LABS, QFN-28-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "c8051f321-gmr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "c8051f321-gmr.kicad_sym",
    "c8051f321-gmr.kicad_mod",
    "c8051f321-gmr.glb",
    "c8051f321-gmr.step",
    "c8051f321-gmr.lbr",
    "docs/hero.png",
    "docs/c8051f321-gmr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "c8051f321-gmr-hero.glb",
    "c8051f321-gmr-hero.overlay.json",
    "c8051f321-gmr-etched.glb"
  ],
  "component": {
    "mpn": "C8051F321-GMR",
    "manufacturer": "SILICON LABS",
    "package": "QFN-28-EP(5x5)",
    "pin_count": 29,
    "category": "Embedded Processors & Controllers",
    "subcategory": "SILICON LABS",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/c3f604a0ad43757ac685ce2da3154266.pdf",
    "parts": {
      "symbol": "c8051f321-gmr.kicad_sym",
      "footprint": "c8051f321-gmr.kicad_mod",
      "model_3d": "c8051f321-gmr-hero.glb",
      "model_3d_plain": "c8051f321-gmr-etched.glb",
      "model_3d_step": "c8051f321-gmr-etched.step",
      "model_3d_step_plain": "c8051f321-gmr.step",
      "lbr": "c8051f321-gmr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2802069",
      "digikey": "C8051F321-GMR-ND",
      "mouser": "634-C8051F321-GMR"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T01:29:25Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "C8051F321-GMR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "634-C8051F321-GMR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "P0.1",
        "type": "bidirectional",
        "description": "Port 0.1 digital I/O pin, configurable through the crossbar as a port pin or peripheral signal."
      },
      {
        "number": "2",
        "name": "P0.0",
        "type": "bidirectional",
        "description": "Port 0.0 digital I/O pin, configurable through the crossbar as a port pin or peripheral signal."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "4",
        "name": "D+",
        "type": "bidirectional",
        "description": "USB D+ data line for the integrated full-speed/low-speed USB transceiver."
      },
      {
        "number": "5",
        "name": "D-",
        "type": "bidirectional",
        "description": "USB D- data line for the integrated full-speed/low-speed USB transceiver."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply voltage input of 2.7-3.6 V; the datasheet also lists a 3.3 V voltage regulator output on this pin."
      },
      {
        "number": "7",
        "name": "REGIN",
        "type": "power_in",
        "description": "5 V regulator input to the on-chip voltage regulator."
      },
      {
        "number": "8",
        "name": "VBUS",
        "type": "power_in",
        "description": "VBUS sense input connected to the USB VBUS signal; a 5 V signal on this pin indicates a USB connection."
      },
      {
        "number": "9",
        "name": "/RST/C2CK",
        "type": "bidirectional",
        "description": "Device reset open-drain output of the POR or VDD monitor, which an external source can drive low for at least 15 µs; also the C2 debug interface clock."
      },
      {
        "number": "10",
        "name": "P3.0/C2D",
        "type": "bidirectional",
        "description": "Port 3.0 GPIO pin that doubles as the bidirectional data signal for the C2 debug interface."
      },
      {
        "number": "11",
        "name": "P2.3",
        "type": "bidirectional",
        "description": "Port 2.3 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "12",
        "name": "P2.2",
        "type": "bidirectional",
        "description": "Port 2.2 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "13",
        "name": "P2.1",
        "type": "bidirectional",
        "description": "Port 2.1 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "14",
        "name": "P2.0",
        "type": "bidirectional",
        "description": "Port 2.0 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "15",
        "name": "P1.7",
        "type": "bidirectional",
        "description": "Port 1.7 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "16",
        "name": "P1.6",
        "type": "bidirectional",
        "description": "Port 1.6 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "17",
        "name": "P1.5",
        "type": "bidirectional",
        "description": "Port 1.5 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "18",
        "name": "P1.4",
        "type": "bidirectional",
        "description": "Port 1.4 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "19",
        "name": "P1.3",
        "type": "bidirectional",
        "description": "Port 1.3 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "20",
        "name": "P1.2",
        "type": "bidirectional",
        "description": "Port 1.2 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "21",
        "name": "P1.1",
        "type": "bidirectional",
        "description": "Port 1.1 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "22",
        "name": "P1.0",
        "type": "bidirectional",
        "description": "Port 1.0 digital I/O or analog input pin, available to the crossbar."
      },
      {
        "number": "23",
        "name": "P0.7/VREF",
        "type": "bidirectional",
        "description": "Port 0.7 digital I/O pin that also serves as the external VREF input or output."
      },
      {
        "number": "24",
        "name": "P0.6/CNVSTR",
        "type": "bidirectional",
        "description": "Port 0.6 digital I/O pin that also serves as the ADC0 external convert start input."
      },
      {
        "number": "25",
        "name": "P0.5",
        "type": "bidirectional",
        "description": "Port 0.5 digital I/O pin, configurable through the crossbar as a port pin or peripheral signal."
      },
      {
        "number": "26",
        "name": "P0.4",
        "type": "bidirectional",
        "description": "Port 0.4 digital I/O pin, configurable through the crossbar as a port pin or peripheral signal."
      },
      {
        "number": "27",
        "name": "P0.3/XTAL2",
        "type": "bidirectional",
        "description": "Port 0.3 digital I/O pin that serves as the external oscillator excitation driver for a crystal or resonator, or an external clock input."
      },
      {
        "number": "28",
        "name": "P0.2/XTAL1",
        "type": "bidirectional",
        "description": "Port 0.2 digital I/O pin that serves as the external oscillator return for a crystal or resonator, or an external clock input."
      },
      {
        "number": "29",
        "name": "EP",
        "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: The datasheet gives 28 numbered pins for the C8051F321 QFN-28 package in Table 4.1, but no exposed t"
        ],
        "pages_sent": 30,
        "cost_usd": 0.0407,
        "at": "2026-10-27T01:29:01"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/c3f604a0ad43757ac685ce2da3154266.pdf",
        "pages": 254,
        "sha256": "46143e2ba725954a",
        "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"
    },
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        "file": "c8051f321-gmr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e9d6d740f505b03e5aa0ac826330f9e269344b84656d051f50eb07ac162749eb",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "c8051f321-gmr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "sha256": "87a3cd65fc6e7c78507a08e9d5cffc42a0c61949d1a28e3a0a77072f50161664",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}