component
ATSAMD21E18A-MUT
Public Made by Adomby adom
Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "atsamd21e18a-mut",
"title": "ATSAMD21E18A-MUT",
"brief": "Microchip Tech 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",
"atsamd21e18a-mut",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "ATSAMD21E18A-MUT",
"manufacturer": "Microchip Tech",
"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/6db5d1d006c4e238efe1771ae5522ff8.pdf",
"parts": {
"symbol": "atsamd21e18a-mut.kicad_sym",
"footprint": "atsamd21e18a-mut.kicad_mod",
"model_3d": "atsamd21e18a-mut-hero.glb",
"model_3d_plain": "atsamd21e18a-mut-etched.glb",
"model_3d_step": "atsamd21e18a-mut-etched.step",
"model_3d_step_plain": "atsamd21e18a-mut.step",
"lbr": "atsamd21e18a-mut.lbr"
},
"distributor_links": {
"lcsc": "C2052801",
"digikey": "ATSAMD21E18A-MUTTR-ND",
"mouser": "556-ATSAMD21E18A-MUT"
},
"distributor_check": {
"checked_at": "2026-11-05T05:02:23Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATSAMD21E18A-MUTTR-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "556-ATSAMD21E18A-MUT",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PA00",
"type": "bidirectional",
"description": "Port A I/O pin 0 on the VDDANA analog supply domain, also EXTINT[0] and the XIN32 32 kHz crystal input when XOSC32K is used."
},
{
"number": "2",
"name": "PA01",
"type": "bidirectional",
"description": "Port A I/O pin 1 on the VDDANA analog supply domain, also EXTINT[1] and the XOUT32 32 kHz crystal output when XOSC32K is used."
},
{
"number": "3",
"name": "PA02",
"type": "bidirectional",
"description": "Port A I/O pin 2 on the VDDANA analog supply domain, with analog input AIN[0], DAC output VOUT and EXTINT[2]."
},
{
"number": "4",
"name": "PA03",
"type": "bidirectional",
"description": "Port A I/O pin 3 on the VDDANA analog supply domain, with analog input AIN[1], EXTINT[3] and the ADC/DAC external reference VREFA."
},
{
"number": "5",
"name": "PA04",
"type": "bidirectional",
"description": "Port A I/O pin 4 on the VDDANA analog supply domain, with analog input AIN[4], EXTINT[4] and the ADC external reference VREFB."
},
{
"number": "6",
"name": "PA05",
"type": "bidirectional",
"description": "Port A I/O pin 5 on the VDDANA analog supply domain, with analog input AIN[5] and EXTINT[5]."
},
{
"number": "7",
"name": "PA06",
"type": "bidirectional",
"description": "Port A I/O pin 6 on the VDDANA analog supply domain, with analog input AIN[6] and EXTINT[6]."
},
{
"number": "8",
"name": "PA07",
"type": "bidirectional",
"description": "Port A I/O pin 7 on the VDDANA analog supply domain, with analog input AIN[7] and EXTINT[7]."
},
{
"number": "9",
"name": "VDDANA",
"type": "power_in",
"description": "Analog supply voltage for the analog power domain, specified at 1.62 V to 3.63 V for SAM D21 in the schematic checklist."
},
{
"number": "10",
"name": "GND",
"type": "power_in",
"description": "Ground connection for the device."
},
{
"number": "11",
"name": "PA08",
"type": "bidirectional",
"description": "Port A I/O pin 8 on the VDDIO supply domain, with NMI, analog input AIN[16] and SERCOM0 PAD[0]; listed as an I2C Hs-capable pin."
},
{
"number": "12",
"name": "PA09",
"type": "bidirectional",
"description": "Port A I/O pin 9 on the VDDIO supply domain, with EXTINT[9], analog input AIN[17] and SERCOM0 PAD[1]; listed as an I2C Hs-capable pin."
},
{
"number": "13",
"name": "PA10",
"type": "bidirectional",
"description": "Port A I/O pin 10 on the VDDIO supply domain, with EXTINT[10], analog input AIN[18] and SERCOM0 PAD[2]."
},
{
"number": "14",
"name": "PA11",
"type": "bidirectional",
"description": "Port A I/O pin 11 on the VDDIO supply domain, with EXTINT[11], analog input AIN[19] and SERCOM0 PAD[3]."
},
{
"number": "15",
"name": "PA14",
"type": "bidirectional",
"description": "Port A I/O pin 14 on the VDDIO supply domain, with EXTINT[14]; it is also the XIN oscillator input when XOSC is used."
},
{
"number": "16",
"name": "PA15",
"type": "bidirectional",
"description": "Port A I/O pin 15 on the VDDIO supply domain, with EXTINT[15]; it is also the XOUT oscillator output when XOSC is used."
},
{
"number": "17",
"name": "PA16",
"type": "bidirectional",
"description": "Port A I/O pin 16 on the VDDIO supply domain, with EXTINT[0] and SERCOM1/SERCOM3 PAD[0] functions."
},
{
"number": "18",
"name": "PA17",
"type": "bidirectional",
"description": "Port A I/O pin 17 on the VDDIO supply domain, with EXTINT[1] and SERCOM1 PAD[1] functions."
},
{
"number": "19",
"name": "PA18",
"type": "bidirectional",
"description": "Port A I/O pin 18 on the VDDIO supply domain, with EXTINT[2] and SERCOM1 PAD[2] functions."
},
{
"number": "20",
"name": "PA19",
"type": "bidirectional",
"description": "Port A I/O pin 19 on the VDDIO supply domain, with EXTINT[3] and SERCOM1 PAD[3] functions."
},
{
"number": "21",
"name": "PA22",
"type": "bidirectional",
"description": "Port A I/O pin 22 on the VDDIO supply domain, with EXTINT[6] and SERCOM3 PAD[0] functions."
},
{
"number": "22",
"name": "PA23",
"type": "bidirectional",
"description": "Port A I/O pin 23 on the VDDIO supply domain, with EXTINT[7] and SERCOM3 PAD[1] functions."
},
{
"number": "23",
"name": "PA24",
"type": "bidirectional",
"description": "Port A I/O pin 24 on the VDDIO supply domain, with EXTINT[12] and USB DM; the datasheet recommends a pull-up through GPIO input mode if the pin is unconnected."
},
{
"number": "24",
"name": "PA25",
"type": "bidirectional",
"description": "Port A I/O pin 25 on the VDDIO supply domain, with EXTINT[13] and USB DP."
},
{
"number": "25",
"name": "PA27",
"type": "bidirectional",
"description": "Port A I/O pin 27 on the VDDIO supply domain, with EXTINT[15] and GCLK_IO[0]."
},
{
"number": "26",
"name": "RESET",
"type": "input",
"description": "External active-low reset input with an internal pull-up; the low-level threshold is below 0.36 × VDDIO at 2.7 V to 3.6 V."
},
{
"number": "27",
"name": "PA28",
"type": "bidirectional",
"description": "Port A I/O pin 28 on the VDDIO supply domain, with EXTINT[8] and GCLK_IO[0]."
},
{
"number": "28",
"name": "GND",
"type": "power_in",
"description": "Ground connection for the device."
},
{
"number": "29",
"name": "VDDCORE",
"type": "power_out",
"description": "Core supply pin for the internal regulator output, to be decoupled with a 1 µF capacitor and specified at 1.6 V to 1.8 V."
},
{
"number": "30",
"name": "VDDIN",
"type": "power_in",
"description": "Input supply pin for the device, part of the single 1.62 V to 3.63 V supply for SAM D21."
},
{
"number": "31",
"name": "PA30",
"type": "bidirectional",
"description": "Port A I/O pin 30 on the VDDIO supply domain, with EXTINT[10] and SWCLK, the Serial Wire Debug clock input."
},
{
"number": "32",
"name": "PA31",
"type": "bidirectional",
"description": "Port A I/O pin 31 on the VDDIO supply domain, with EXTINT[11] and SWDIO, the Serial Wire Debug data pin which is only active when a debugger is present."
},
{
"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-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 QFN32 pinout page (p.25) lists no exposed thermal pad (EP) pin and the extracted text does not s; Table 7-1 states that PA08 and higher port pins are supplied from VDDIO, but the A-variant QFN32/TQF; Pin types and descriptions were built from the pinout (p.25) plus the multiplexing tables (pp.30-31)",
"exposed pad 33 added from the footprint"
],
"pages_sent": 121,
"cost_usd": 0.5832,
"at": "2026-11-05T05:02:03"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/6db5d1d006c4e238efe1771ae5522ff8.pdf",
"pages": 1115,
"sha256": "5c05352e2d8abf43",
"source_tier": "mfr"
},
"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": "atsamd21e18a-mut.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": "2026-11-05",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atsamd21e18a-mut-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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"zmin_mm": 0,
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"footprint_binding": "identity",
"sha256": "531dc2562227d8a48e55833eca554eda10a9b2d99e934f189a682cf7cdc693c5",
"checked": "2026-11-05",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "QFN-32-EP(5x5)",
"Category": "Single Chip Microcomputer/Microcontroller",
"Pins": "33"
},
"appearance": {
"contacts": {
"quote": "including indium tin oxide (ITO) sensor grids. The PTC requires one pin per X-line and one pin per Y-line. In the self-capacitance mode, the PTC requires only one pin (Y-line) for each touch sensor.",
"page": 860,
"doc": "ds.pdf",
"plating": "tin"
},
"version": 1,
"datasheet_sha256": "5c05352e2d8abf43225f4f104be8b258bc531dad70ec370ba0a54cbd0ac7d514"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "5c05352e2d8abf43225f4f104be8b258bc531dad70ec370ba0a54cbd0ac7d514",
"rows": [
{
"name": "Operating voltage (VDD, VDDIO/VDDIN/VDDANA)",
"symbol": "VDD",
"kind": "recommended_operating",
"unit": "V",
"min": 1.62,
"typ": null,
"max": 3.63,
"conditions": "SAM D21 variant; VDDIO, VDDIN and VDDANA must be the same voltage",
"source_page": 36,
"source": "datasheet"
},
{
"name": "Operating temperature range (ordering grade U)",
"symbol": "",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "Ordering suffix U = -40 - 85°C Matte Sn plating; MUT suffix = QFN, tape and reel",
"source_page": 17,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"atsamd21e18a-mut"
],
"discovery_pitch": "ATSAMD21E18A-MUT (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
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"path": "docs/hero.png"
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"visibility": {
"public": true
}
}