component
WM8940CGEFL
Public Made by Adomby adom
Cirrus Logic Audio Interface ICs, QFN-24(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"version": "0.1.0",
"type": "component",
"description": "Cirrus Logic Audio Interface ICs, QFN-24(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"communication interface chip-uart-485-232",
"wm8940cgefl",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
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"component": {
"mpn": "WM8940CGEFL",
"manufacturer": "Cirrus Logic",
"package": "QFN-24(4x4)",
"pin_count": 25,
"category": "Communication Interface Chip/UART/485/232",
"subcategory": "Audio Interface ICs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/bf61d6888a56073df6d5f2334c8e0954.pdf",
"parts": {
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"lbr": "wm8940cgefl.lbr"
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"distributor_links": {
"lcsc": "C2151126"
},
"distributor_check": {
"checked_at": "2026-10-30T11:50:45Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "MICBIAS",
"type": "power_out",
"description": "Microphone bias output for electret microphones."
},
{
"number": "2",
"name": "AVDD",
"type": "power_in",
"description": "Analogue supply, 2.5V to 3.6V, must be >= digital supply voltages."
},
{
"number": "3",
"name": "AGND",
"type": "power_in",
"description": "Analogue ground; the QFN ground paddle is recommended to be connected to analogue ground."
},
{
"number": "4",
"name": "DCVDD",
"type": "power_in",
"description": "Digital core supply, 1.71V to 3.6V, must be <= DBVDD."
},
{
"number": "5",
"name": "DBVDD",
"type": "power_in",
"description": "Digital input/output buffer supply, 1.71V to 3.6V, must be >= DCVDD."
},
{
"number": "6",
"name": "DGND",
"type": "power_in",
"description": "Digital ground, must be within 0.3V of analogue ground."
},
{
"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, input in slave mode and output in master mode."
},
{
"number": "10",
"name": "BCLK",
"type": "bidirectional",
"description": "Digital audio port clock, input in slave mode and output in master mode."
},
{
"number": "11",
"name": "MCLK",
"type": "input",
"description": "Master clock input."
},
{
"number": "12",
"name": "CSB/GPIO",
"type": "bidirectional",
"description": "3-wire control interface chip select or GPIO pin."
},
{
"number": "13",
"name": "SCLK",
"type": "input",
"description": "3-wire control interface clock input / 2-wire control interface clock input."
},
{
"number": "14",
"name": "SDIN",
"type": "bidirectional",
"description": "3-wire control interface data input / 2-wire control interface data input."
},
{
"number": "15",
"name": "MODE/GPIO",
"type": "bidirectional",
"description": "Control interface mode selection (low = 2-wire, high or Hi-Z = 3-wire) or GPIO pin."
},
{
"number": "16",
"name": "MONOOUT",
"type": "output",
"description": "Mono line output."
},
{
"number": "17",
"name": "SPKOUTP",
"type": "output",
"description": "Speaker output positive."
},
{
"number": "18",
"name": "SPKGND",
"type": "power_in",
"description": "Speaker ground."
},
{
"number": "19",
"name": "SPKOUTN",
"type": "output",
"description": "Speaker output negative."
},
{
"number": "20",
"name": "SPKVDD",
"type": "power_in",
"description": "Speaker supply, 2.5V to 3.6V, must be >= digital supply voltages."
},
{
"number": "21",
"name": "AUX",
"type": "input",
"description": "Auxiliary analogue input."
},
{
"number": "22",
"name": "VMID",
"type": "passive",
"description": "Decoupling for midrail reference voltage."
},
{
"number": "23",
"name": "MICN",
"type": "input",
"description": "Microphone negative input (common mode)."
},
{
"number": "24",
"name": "MICP",
"type": "input",
"description": "Microphone positive input."
},
{
"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-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 text does not number the exposed ground paddle as a pin. The datasheet recommends conn; The pin types for MICBIAS (power_out), VMID (passive) and the bidirectional control pins were inferr"
],
"pages_sent": 17,
"cost_usd": 0.1422,
"at": "2026-10-30T11:50:31"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/bf61d6888a56073df6d5f2334c8e0954.pdf",
"pages": 91,
"sha256": "c8f0e2097c3b34ff",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 25,
"described": 25,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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