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Ray Set visibility: public 0eb3015 11d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "wm8974cgefl",
  "title": "WM8974CGEFL",
  "brief": "Cirrus Logic Audio Interface ICs, QFN-24-EP(4x4). 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",
    "interface ics",
    "wm8974cgefl",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "WM8974CGEFL",
    "manufacturer": "Cirrus Logic",
    "package": "QFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "Interface ICs",
    "subcategory": "Audio Interface ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/580f3a7c8511e53547a64c64564ad1e4.pdf",
    "parts": {
      "symbol": "wm8974cgefl.kicad_sym",
      "footprint": "wm8974cgefl.kicad_mod",
      "model_3d": "wm8974cgefl-hero.glb",
      "model_3d_plain": "wm8974cgefl-etched.glb",
      "model_3d_step": "wm8974cgefl-etched.step",
      "model_3d_step_plain": "wm8974cgefl.step",
      "lbr": "wm8974cgefl.lbr"
    },
    "distributor_links": {
      "lcsc": "C323849"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T06:25:57Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "MICBIAS",
        "type": "output",
        "description": "Microphone bias output for electret microphones."
      },
      {
        "number": "2",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analogue supply feeding the ADC and DAC, specified at 2.5V to 3.6V with an absolute maximum of +4.2V."
      },
      {
        "number": "3",
        "name": "AGND",
        "type": "power_in",
        "description": "Analogue ground feeding the ADC and DAC; analogue and digital grounds must always be within 0.3V of each other."
      },
      {
        "number": "4",
        "name": "DCVDD",
        "type": "power_in",
        "description": "Digital core supply specified at 1.71V to 3.6V, and must be 1.9V or higher when the PLL is used."
      },
      {
        "number": "5",
        "name": "DBVDD",
        "type": "power_in",
        "description": "Digital buffer (input/output) supply specified at 1.71V to 3.6V, subject to the DCVDD relationship in the recommended operating conditions notes."
      },
      {
        "number": "6",
        "name": "DGND",
        "type": "power_in",
        "description": "Digital ground; analogue and digital grounds must always be within 0.3V of each other."
      },
      {
        "number": "7",
        "name": "ADCDAT",
        "type": "output",
        "description": "ADC digital audio data output."
      },
      {
        "number": "8",
        "name": "DACDAT",
        "type": "input",
        "description": "DAC digital audio data input."
      },
      {
        "number": "9",
        "name": "FRAME",
        "type": "bidirectional",
        "description": "DAC and ADC sample rate clock or frame synch, configured as an input or, in master mode, an output generated by the WM8974."
      },
      {
        "number": "10",
        "name": "BCLK",
        "type": "bidirectional",
        "description": "Digital audio port clock, configured as an input or, in master mode, an output generated by the WM8974."
      },
      {
        "number": "11",
        "name": "MCLK",
        "type": "input",
        "description": "Master clock input, which can be used directly or through the on-chip PLL."
      },
      {
        "number": "12",
        "name": "CSB/GPIO",
        "type": "bidirectional",
        "description": "3-wire MPU chip select or general purpose input/output pin; GPIO function is only available in 2-wire mode."
      },
      {
        "number": "13",
        "name": "SCLK",
        "type": "input",
        "description": "3-wire MPU clock input or 2-wire MPU clock input."
      },
      {
        "number": "14",
        "name": "SDIN",
        "type": "bidirectional",
        "description": "3-wire MPU data input or 2-wire MPU data input."
      },
      {
        "number": "15",
        "name": "MODE",
        "type": "input",
        "description": "Control interface mode selection pin: low selects 2-wire mode and high selects 3-wire mode."
      },
      {
        "number": "16",
        "name": "MONOOUT",
        "type": "output",
        "description": "Mono line output."
      },
      {
        "number": "17",
        "name": "SPKOUTP",
        "type": "output",
        "description": "Positive speaker output."
      },
      {
        "number": "18",
        "name": "SPKGND",
        "type": "power_in",
        "description": "Speaker ground feeding the speaker and mono output amplifiers only."
      },
      {
        "number": "19",
        "name": "SPKOUTN",
        "type": "output",
        "description": "Negative speaker output."
      },
      {
        "number": "20",
        "name": "SPKVDD",
        "type": "power_in",
        "description": "Speaker supply feeding the speaker and mono output amplifiers only, specified at 2.5V to 5.5V with an absolute maximum of +7V."
      },
      {
        "number": "21",
        "name": "AUX",
        "type": "input",
        "description": "Auxiliary analogue input."
      },
      {
        "number": "22",
        "name": "VMID",
        "type": "passive",
        "description": "Decoupling pin for the midrail reference voltage."
      },
      {
        "number": "23",
        "name": "MICN",
        "type": "input",
        "description": "Negative microphone input."
      },
      {
        "number": "24",
        "name": "MICP",
        "type": "input",
        "description": "Positive microphone input (common mode)."
      },
      {
        "number": "25",
        "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 says the QFN ground paddle (exposed heat sink slug) should be connected to analogue gr; The note on DBVDD relative to DCVDD (note 3 under recommended operating conditions) has its comparis; Pin types were mapped to KiCad ERC classes from the datasheet's Type column: analogue outputs to out",
          "exposed pad 25 added from the footprint"
        ],
        "pages_sent": 14,
        "cost_usd": 0.0794,
        "at": "2026-10-30T06:25:44"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/580f3a7c8511e53547a64c64564ad1e4.pdf",
        "pages": 89,
        "sha256": "0f03918969831df6",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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        "seat": "z = 0",
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        "centre_offset_mm": 0,
        "footprint_binding": "identity",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Cirrus Logic",
      "Package": "QFN-24-EP(4x4)",
      "Category": "Interface ICs",
      "Pins": "25"
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    "characteristics": {
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          "name": "Speaker supply",
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          "name": "Ground DGND,AGND,SPKGND (single printed value 0 V; column not clear in extraction)",
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          "name": "DBVDD, DCVDD, AVDD supply voltages",
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          "name": "SPKVDD supply voltage",
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          "name": "Voltage range digital inputs",
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        {
          "name": "Voltage range analogue inputs",
          "symbol": "",
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          "min": -0.3,
          "typ": null,
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          "conditions": "Minimum relative to AGND; maximum printed as AVDD +0.3V (not a fixed number)",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Operating temperature range",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "C",
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        {
          "name": "Storage temperature after soldering",
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        {
          "name": "Selectable Input Gain Boost",
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          "name": "ALC Target Record Level",
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          "name": "ALC Programmable Gain",
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          "name": "Gain Hold Time",
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          "conditions": "MCLK=12.288MHz; time doubles with each step",
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          "name": "Gain Ramp-Up (Decay) Time",
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          "name": "Gain Ramp-Up (Decay) Time (limiter)",
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          "name": "Gain Ramp-Down (Attack) Time",
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          "name": "Gain Ramp-Down (Attack) Time (limiter)",
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          "name": "ADC Signal to Noise Ratio",
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          "source": "datasheet"
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        {
          "name": "ADC Total Harmonic Distortion",
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          "kind": "electrical",
          "unit": "dB",
          "min": -75,
          "typ": -83,
          "max": null,
          "conditions": "-1dBFS input, 0dB PGA gain",
          "source_page": 6,
          "source": "datasheet"
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        {
          "name": "DAC to MONO Signal to Noise Ratio",
          "symbol": "SNR",
          "kind": "electrical",
          "unit": "dB",
          "min": 90,
          "typ": 98,
          "max": null,
          "conditions": "A-weighted",
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          "source": "datasheet"
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        {
          "name": "Speaker Output PGA Programmable Gain",
          "symbol": "",
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          "unit": "dB",
          "min": -57,
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        {
          "name": "BTL Speaker Signal to Noise Ratio",
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          "kind": "electrical",
          "unit": "dB",
          "min": 90,
          "typ": 101,
          "max": null,
          "conditions": "SPKVDD=3.3V, RL = 8",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Digital Input HIGH Level",
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          "kind": "electrical",
          "unit": "x DVDD",
          "min": 0.7,
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          "max": null,
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        {
          "name": "Digital Input LOW Level",
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          "unit": "x DVDD",
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          "conditions": "IOL=1mA",
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          "name": "Digital Output LOW Level",
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          "conditions": "IOH-1mA",
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          "source": "datasheet"
        },
        {
          "name": "ADC Path Total Group Delay (EQ disabled)",
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          "unit": "/fs",
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          "name": "ADC Path Total Group Delay (EQ enabled)",
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          "name": "DAC Path Total Group Delay (EQ disabled)",
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          "source": "datasheet"
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          "name": "DAC Path Total Group Delay (EQ enabled)",
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  "discovery_pitch": "WM8974CGEFL (Cirrus Logic) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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  }
}