EFM8UB20F64G-B-QFN32

{
  "schema_version": 1,
  "type": "component",
  "slug": "efm8ub20f64g-b-qfn32",
  "title": "EFM8UB20F64G-B-QFN32",
  "brief": "SILICON LABS Pre-ordered MCUs, QFN-32-EP(5x5). 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",
    "embedded processors & controllers",
    "efm8ub20f64g-b-qfn32",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "EFM8UB20F64G-B-QFN32",
    "manufacturer": "SILICON LABS",
    "package": "QFN-32-EP(5x5)",
    "pin_count": 33,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Pre-ordered MCUs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/0d08b3417abb081537bb7e6c1f30209d.pdf",
    "parts": {
      "symbol": "efm8ub20f64g-b-qfn32.kicad_sym",
      "footprint": "efm8ub20f64g-b-qfn32.kicad_mod",
      "model_3d": "efm8ub20f64g-b-qfn32-hero.glb",
      "model_3d_plain": "efm8ub20f64g-b-qfn32-etched.glb",
      "model_3d_step": "efm8ub20f64g-b-qfn32-etched.step",
      "model_3d_step_plain": "efm8ub20f64g-b-qfn32.step",
      "lbr": "efm8ub20f64g-b-qfn32.lbr"
    },
    "distributor_links": {
      "lcsc": "C1340455",
      "digikey": "EFM8UB20F64G-B-QFN32-ND",
      "mouser": "634-EFM8UBF64GBQFN32"
    },
    "distributor_check": {
      "checked_at": "2026-11-08T00:51:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "EFM8UB20F64G-B-QFN32-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "634-EFM8UBF64GBQFN32",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "P0.1",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with INT0.1/INT1.1 external interrupts and ADC0P.18/ADC0N.18 and CMP0N.4 analog functions."
      },
      {
        "number": "2",
        "name": "P0.0",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with INT0.0/INT1.0 external interrupts and ADC0P.17/ADC0N.17 and CMP0P.4 analog functions."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "4",
        "name": "D+",
        "type": "bidirectional",
        "description": "USB data positive."
      },
      {
        "number": "5",
        "name": "D-",
        "type": "bidirectional",
        "description": "USB data negative."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply power input / 5V regulator output."
      },
      {
        "number": "7",
        "name": "VREGIN",
        "type": "power_in",
        "description": "5V regulator input."
      },
      {
        "number": "8",
        "name": "VBUS",
        "type": "power_in",
        "description": "USB VBUS sense input."
      },
      {
        "number": "9",
        "name": "RSTb / C2CK",
        "type": "bidirectional",
        "description": "Active-low reset and C2 debug clock."
      },
      {
        "number": "10",
        "name": "P3.0 / C2D",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability shared with C2 debug data, with ADC0P.16/ADC0N.16 analog functions."
      },
      {
        "number": "11",
        "name": "P2.7",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.15/ADC0N.15 analog functions."
      },
      {
        "number": "12",
        "name": "P2.6",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.14/ADC0N.14 analog functions."
      },
      {
        "number": "13",
        "name": "P2.5",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.13/ADC0N.13 and CMP0N.3 analog functions."
      },
      {
        "number": "14",
        "name": "P2.4",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.12/ADC0N.12 and CMP0P.3 analog functions."
      },
      {
        "number": "15",
        "name": "P2.3",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.11/ADC0N.11 and CMP1N.2 analog functions."
      },
      {
        "number": "16",
        "name": "P2.2",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.10/ADC0N.10 and CMP1P.2 analog functions."
      },
      {
        "number": "17",
        "name": "P2.1",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.9/ADC0N.9 and CMP0N.2 analog functions."
      },
      {
        "number": "18",
        "name": "P2.0",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.8/ADC0N.8 and CMP0P.2 analog functions."
      },
      {
        "number": "19",
        "name": "P1.7",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.7/ADC0N.7 and CMP1N.1 analog functions."
      },
      {
        "number": "20",
        "name": "P1.6",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.6/ADC0N.6 and CMP1P.1 analog functions."
      },
      {
        "number": "21",
        "name": "P1.5",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.5/ADC0N.5 and CMP0N.1 analog functions."
      },
      {
        "number": "22",
        "name": "P1.4",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.4/ADC0N.4 and CMP0P.1 analog functions."
      },
      {
        "number": "23",
        "name": "P1.3",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.3/ADC0N.3 and CMP1N.0 analog functions."
      },
      {
        "number": "24",
        "name": "P1.2",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.2/ADC0N.2 and CMP1P.0 analog functions."
      },
      {
        "number": "25",
        "name": "P1.1",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.1/ADC0N.1 and CMP0N.0 analog functions."
      },
      {
        "number": "26",
        "name": "P1.0",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with ADC0P.0/ADC0N.0 and CMP0P.0 analog functions."
      },
      {
        "number": "27",
        "name": "P0.7",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with INT0.7/INT1.7 external interrupts and VREF."
      },
      {
        "number": "28",
        "name": "P0.6",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with CNVSTR and INT0.6/INT1.6 external interrupts."
      },
      {
        "number": "29",
        "name": "P0.5",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with UART0_RX, INT0.5/INT1.5 and ADC0P.20/ADC0N.20 and CMP1N.4 analog functions."
      },
      {
        "number": "30",
        "name": "P0.4",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with UART0_TX, INT0.4/INT1.4 and ADC0P.19/ADC0N.19 and CMP1P.4 analog functions."
      },
      {
        "number": "31",
        "name": "P0.3",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with EXTCLK and INT0.3/INT1.3 external interrupts."
      },
      {
        "number": "32",
        "name": "P0.2",
        "type": "bidirectional",
        "description": "Multifunction I/O with crossbar capability, with INT0.2/INT1.2 external interrupts."
      },
      {
        "number": "33",
        "name": "GND",
        "type": "power_in",
        "description": "Center pad ground."
      }
    ],
    "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: The datasheet lists the center pad only as 'Center GND' with no pin number. I numbered it '33' as a ; VDD is described as 'Supply Power Input / 5V Regulator Output'. It can act as both input and output,; The QFN32 pin table gives no electrical limits for individual pins, so the descriptions list functio",
          "1/33 pins cited to the wrong page (name found elsewhere): ['33:GND@p41']",
          "1/33 pin names appear NOWHERE in the datasheet text: ['4:D+@p39']"
        ],
        "pages_sent": 30,
        "cost_usd": 0.135,
        "at": "2026-11-08T00:51:00"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/0d08b3417abb081537bb7e6c1f30209d.pdf",
        "pages": 57,
        "sha256": "6022323e8bbca04e",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "efm8ub20f64g-b-qfn32.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5,
          5,
          0.875
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
        "checked": "2026-11-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "efm8ub20f64g-b-qfn32-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5,
          5,
          0.875
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "fe04c6b2d80e12915c15d488464684d6db21d3fdebbecbfbd394571fb0e3c29f",
        "checked": "2026-11-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "SILICON LABS",
      "Package": "QFN-32-EP(5x5)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "33"
    },
    "appearance": {
      "housing": {
        "quote": "4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components.",
        "page": 43,
        "doc": "ds.pdf",
        "material": "PC"
      },
      "version": 1,
      "datasheet_sha256": "6022323e8bbca04edc090ec64384cd153a4207f06c01ae013b3ca5ffafc0d7fb"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "6022323e8bbca04edc090ec64384cd153a4207f06c01ae013b3ca5ffafc0d7fb",
      "rows": [
        {
          "name": "Operating Supply Voltage on VDD",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.72,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Operating Supply Voltage on VREGIN",
          "symbol": "VREGIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 5.25,
          "conditions": "",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "System Clock Frequency",
          "symbol": "fSYSCLK",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": 0,
          "typ": null,
          "max": 48,
          "conditions": "",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Operating Ambient Temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Ambient Temperature Under Bias",
          "symbol": "TBIAS",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Voltage on VDD",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 4.2,
          "conditions": "Min is GND-0.3",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Voltage on VREGIN",
          "symbol": "VREGIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.8,
          "conditions": "Min is GND-0.3",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Voltage on I/O, RSTb, or VBUS pins",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.8,
          "conditions": "VDD > 2.2 V; min is GND-0.3",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Voltage on I/O, RSTb, or VBUS pins",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "VDD < 2.2 V; min is GND-0.3, max is VDD+3.6",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Total Current Sunk into Supply Pin",
          "symbol": "IVDD",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Total Current Sourced out of Ground Pin",
          "symbol": "IGND",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": 500,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Current Sourced or Sunk by any I/O Pin or RSTb",
          "symbol": "IIO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance QFN32 Packages",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 28,
          "max": null,
          "conditions": "",
          "source_page": 22,
          "source": "datasheet"
        },
        {
          "name": "Digital Core Supply Current, Normal Mode, full speed",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 12,
          "max": 14,
          "conditions": "FSYSCLK = 48 MHz",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Digital Core Supply Current, Normal Mode, full speed",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 7,
          "max": 8,
          "conditions": "FSYSCLK = 24 MHz",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Digital Core Supply Current, Idle Mode",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 6.5,
          "max": 8,
          "conditions": "FSYSCLK = 48 MHz",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Digital Core Supply Current, Idle Mode",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3.5,
          "max": 5,
          "conditions": "FSYSCLK = 24 MHz",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "ADC0 Supply Current",
          "symbol": "IADC",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 750,
          "max": 1000,
          "conditions": "Operating at 500 ksps, VDD = 3.0 V",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Voltage Supply Monitor (VMON0) Current",
          "symbol": "IVMON",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 15,
          "max": 50,
          "conditions": "",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency, High Frequency Oscillator 0 (48 MHz)",
          "symbol": "fHFOSC0",
          "kind": "electrical",
          "unit": "MHz",
          "min": 47.3,
          "typ": 48,
          "max": 48.7,
          "conditions": "Full Temperature and Supply Range",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency, Low Frequency Oscillator (80 kHz)",
          "symbol": "fLFOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 75,
          "typ": 80,
          "max": 85,
          "conditions": "Full Temperature and Supply Range",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Throughput Rate",
          "symbol": "fS",
          "kind": "electrical",
          "unit": "ksps",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Tracking Time",
          "symbol": "tTRK",
          "kind": "timing",
          "unit": "ns",
          "min": 300,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "SAR Clock Frequency",
          "symbol": "fSAR",
          "kind": "electrical",
          "unit": "MHz",
          "min": null,
          "typ": null,
          "max": 8.33,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Conversion Time",
          "symbol": "tCNV",
          "kind": "timing",
          "unit": "Clocks",
          "min": 13,
          "typ": null,
          "max": null,
          "conditions": "10-Bit Conversion",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Voltage Reference Range",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "Max is VDD",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Integral Nonlinearity",
          "symbol": "INL",
          "kind": "electrical",
          "unit": "LSB",
          "min": null,
          "typ": 0.5,
          "max": 1,
          "conditions": "DC Performance, VREF = 2.4 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Differential Nonlinearity (Guaranteed Monotonic)",
          "symbol": "DNL",
          "kind": "electrical",
          "unit": "LSB",
          "min": null,
          "typ": 0.5,
          "max": 1,
          "conditions": "DC Performance, VREF = 2.4 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Offset Error",
          "symbol": "EOFF",
          "kind": "electrical",
          "unit": "LSB",
          "min": -2,
          "typ": 0,
          "max": 2,
          "conditions": "DC Performance, VREF = 2.4 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Slope Error",
          "symbol": "EM",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": -0.2,
          "max": 0.5,
          "conditions": "DC Performance, VREF = 2.4 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "On-chip Precision Reference Output Voltage",
          "symbol": "VREFP",
          "kind": "electrical",
          "unit": "V",
          "min": 2.38,
          "typ": 2.42,
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