component
EFM8SB20F32G-B-QFN32R
Public Made by Adomby adom
SILICON LABS Microcontroller Units (MCUs/MPUs/SOCs), QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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Ray
Set visibility: public
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{
"schema_version": 1,
"type": "component",
"slug": "efm8sb20f32g-b-qfn32r",
"title": "EFM8SB20F32G-B-QFN32R",
"brief": "SILICON LABS Microcontroller Units (MCUs/MPUs/SOCs), 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",
"single chip microcomputer-microcontroller",
"efm8sb20f32g-b-qfn32r",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "EFM8SB20F32G-B-QFN32R",
"manufacturer": "SILICON LABS",
"package": "QFN-32-EP(5x5)",
"pin_count": 33,
"category": "Single Chip Microcomputer/Microcontroller",
"subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/c994f29e46cd6ed624d13285dc82f4b7.pdf",
"parts": {
"symbol": "efm8sb20f32g-b-qfn32r.kicad_sym",
"footprint": "efm8sb20f32g-b-qfn32r.kicad_mod",
"model_3d": "efm8sb20f32g-b-qfn32r-hero.glb",
"model_3d_plain": "efm8sb20f32g-b-qfn32r-etched.glb",
"model_3d_step": "efm8sb20f32g-b-qfn32r-etched.step",
"model_3d_step_plain": "efm8sb20f32g-b-qfn32r.step",
"lbr": "efm8sb20f32g-b-qfn32r.lbr"
},
"distributor_links": {
"lcsc": "C2054012",
"digikey": "2832-EFM8SB20F32G-B-QFN32RTR-ND",
"mouser": "634-EFM8SB32GBQFN32R"
},
"distributor_check": {
"checked_at": "2026-11-09T06:45:40Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "2832-EFM8SB20F32G-B-QFN32RTR-ND",
"status": "found"
},
"mouser": {
"pn": "634-EFM8SB32GBQFN32R",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "N/C",
"type": "unconnected",
"description": "No connection."
},
{
"number": "2",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "3",
"name": "VDD",
"type": "power_in",
"description": "Supply power input; the device is specified for a single 1.8 to 3.6 V supply."
},
{
"number": "4",
"name": "N/C",
"type": "unconnected",
"description": "No connection."
},
{
"number": "5",
"name": "N/C",
"type": "unconnected",
"description": "No connection."
},
{
"number": "6",
"name": "RSTb / C2CK",
"type": "bidirectional",
"description": "Active-low reset input that doubles as the C2 debug clock."
},
{
"number": "7",
"name": "P2.7 / C2D",
"type": "bidirectional",
"description": "Multifunction I/O that doubles as the C2 debug data line."
},
{
"number": "8",
"name": "P2.6",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with EMIF_WRb, ADC0.22, CMP0P.11 and CMP1P.11 functions."
},
{
"number": "9",
"name": "XTAL4",
"type": "passive",
"description": "RTC crystal connection (XTAL4)."
},
{
"number": "10",
"name": "XTAL3",
"type": "passive",
"description": "RTC crystal connection (XTAL3)."
},
{
"number": "11",
"name": "P2.5",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with EMIF_RDb, ADC0.21, CMP0N.10 and CMP1N.10 functions."
},
{
"number": "12",
"name": "P2.4",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with EMIF_ALE, ADC0.20, CMP0P.10 and CMP1P.10 functions."
},
{
"number": "13",
"name": "P2.3",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with EMIF_A11, ADC0.19, CMP0N.9 and CMP1N.9 functions."
},
{
"number": "14",
"name": "P2.2",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with EMIF_A10, ADC0.18, CMP0P.9 and CMP1P.9 functions."
},
{
"number": "15",
"name": "P2.1",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with EMIF_A9, ADC0.17, CMP0N.8 and CMP1N.8 functions."
},
{
"number": "16",
"name": "P2.0",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with EMIF_A8, ADC0.16, CMP0P.8 and CMP1P.8 functions."
},
{
"number": "17",
"name": "P1.7",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P1MAT.7, EMIF_AD7, ADC0.15, CMP0N.7 and CMP1N.7 functions."
},
{
"number": "18",
"name": "P1.6",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P1MAT.6, EMIF_AD6, ADC0.14, CMP0P.7 and CMP1P.7 functions."
},
{
"number": "19",
"name": "P1.5",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P1MAT.5, EMIF_AD5, ADC0.13, CMP0N.6 and CMP1N.6 functions."
},
{
"number": "20",
"name": "P1.4",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P1MAT.4, EMIF_AD4, ADC0.12, CMP0P.6 and CMP1P.6 functions."
},
{
"number": "21",
"name": "P1.3",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P1MAT.3, SPI1_NSS, EMIF_AD3, ADC0.11, CMP0N.5 and CMP1N.5 functions."
},
{
"number": "22",
"name": "P1.2",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P1MAT.2, SPI1_MOSI, EMIF_AD2, ADC0.10, CMP0P.5 and CMP1P.5 functions."
},
{
"number": "23",
"name": "P1.1",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P1MAT.1, SPI1_MISO, EMIF_AD1, ADC0.9, CMP0N.4 and CMP1N.4 functions."
},
{
"number": "24",
"name": "P1.0",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P1MAT.0, SPI1_SCK, EMIF_AD0, ADC0.8, CMP0P.4 and CMP1P.4 functions."
},
{
"number": "25",
"name": "P0.7",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P0MAT.7, INT0.7, INT1.7, ADC0.7, IREF0, CMP0N.3 and CMP1N.3 functions."
},
{
"number": "26",
"name": "P0.6",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P0MAT.6, CNVSTR, INT0.6, INT1.6, ADC0.6, CMP0P.3 and CMP1P.3 functions."
},
{
"number": "27",
"name": "P0.5",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P0MAT.5, INT0.5, INT1.5, ADC0.5, CMP0N.2 and CMP1N.2 functions."
},
{
"number": "28",
"name": "P0.4",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P0MAT.4, INT0.4, INT1.4, ADC0.4, CMP0P.2 and CMP1P.2 functions."
},
{
"number": "29",
"name": "P0.3",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P0MAT.3, EXTCLK, INT0.3, INT1.3, ADC0.3, XTAL2, CMP0N.1 and CMP1N.1 functions."
},
{
"number": "30",
"name": "P0.2",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P0MAT.2, INT0.2, INT1.2, ADC0.2, CMP0P.1, CMP1P.1 and XTAL1 functions."
},
{
"number": "31",
"name": "P0.1",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P0MAT.1, INT0.1, INT1.1, ADC0.1, AGND, CMP0N.0 and CMP1N.0 functions."
},
{
"number": "32",
"name": "P0.0",
"type": "bidirectional",
"description": "Multifunction crossbar I/O with P0MAT.0, INT0.0, INT1.0, ADC0.0, CMP0P.0, CMP1P.0 and VREF functions."
},
{
"number": "33",
"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 lists the center pad only as 'Center GND' with no pin number. I assigned '33' by conve; The datasheet does not give a pin type for the I/O pins. I classed the port pins and RSTb/C2CK as bi; The datasheet text does not state the QFN32 pin-1 corner or the exposed-pad size on this page. The 3"
],
"pages_sent": 29,
"cost_usd": 0.1316,
"at": "2026-11-09T06:45:32"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/c994f29e46cd6ed624d13285dc82f4b7.pdf",
"pages": 55,
"sha256": "bd12812dfeaa3893",
"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": [
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"file": "efm8sb20f32g-b-qfn32r.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": "2026-11-09",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "efm8sb20f32g-b-qfn32r-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": "f28fc9e4f36639a4c00d6c7fdf27f7296d3496e668179df86ac8c5b57364e767",
"checked": "2026-11-09",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "SILICON LABS",
"Package": "QFN-32-EP(5x5)",
"Category": "Single Chip Microcomputer/Microcontroller",
"Pins": "33"
},
"appearance": {
"housing": {
"quote": "4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components.",
"page": 41,
"doc": "ds.pdf",
"material": "PC"
},
"version": 1,
"datasheet_sha256": "bd12812dfeaa3893aca27f35e66018a0fa860e6d6c667313a3313fa92ac11f22"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"efm8sb20f32g-b-qfn32r"
],
"discovery_pitch": "EFM8SB20F32G-B-QFN32R (SILICON LABS) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray"
},
"dependencies": {},
"hero": {
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"path": "docs/hero.png"
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"visibility": {
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}