component
ATSAMD20E18A-MN
Public Made by Adomby adom
Microchip Tech Pre-ordered MCUs, 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": "atsamd20e18a-mn",
"title": "ATSAMD20E18A-MN",
"brief": "Microchip Tech 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",
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"atsamd20e18a-mn",
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"component": {
"mpn": "ATSAMD20E18A-MN",
"manufacturer": "Microchip Tech",
"package": "QFN-32-EP(5x5)",
"pin_count": 33,
"category": "Embedded Processors & Controllers",
"subcategory": "Pre-ordered MCUs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/70a692cf8b8dcfe634d1cacc20eac2ef.pdf",
"parts": {
"symbol": "atsamd20e18a-mn.kicad_sym",
"footprint": "atsamd20e18a-mn.kicad_mod",
"model_3d": "atsamd20e18a-mn-hero.glb",
"model_3d_plain": "atsamd20e18a-mn-etched.glb",
"model_3d_step": "atsamd20e18a-mn-etched.step",
"model_3d_step_plain": "atsamd20e18a-mn.step",
"lbr": "atsamd20e18a-mn.lbr"
},
"distributor_links": {
"lcsc": "C614235",
"digikey": "ATSAMD20E18A-MN-ND",
"mouser": "556-ATSAMD20E18A-MN"
},
"distributor_check": {
"checked_at": "2026-10-30T20:34:36Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATSAMD20E18A-MN-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "556-ATSAMD20E18A-MN",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PA00",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA supply; EXTINT[0], SERCOM1/PAD[0], TC2/WO[0], or XIN32 (32 kHz crystal input)."
},
{
"number": "2",
"name": "PA01",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA supply; EXTINT[1], SERCOM1/PAD[1], TC2/WO[1], or XOUT32 (32 kHz crystal output)."
},
{
"number": "3",
"name": "PA02",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA supply; EXTINT[2], ADC AIN[0], PTC Y[0], or DAC VOUT."
},
{
"number": "4",
"name": "PA03",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA supply; EXTINT[3], ADC/DAC external reference VREFA, ADC AIN[1], or PTC Y[1]."
},
{
"number": "5",
"name": "PA04",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA supply; EXTINT[4], ADC VREFB, ADC AIN[4], AC AIN[0], PTC Y[2], SERCOM0/PAD[0], or TC0/WO[0]."
},
{
"number": "6",
"name": "PA05",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA supply; EXTINT[5], ADC AIN[5], AC AIN[1], PTC Y[3], SERCOM0/PAD[1], or TC0/WO[1]."
},
{
"number": "7",
"name": "PA06",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA supply; EXTINT[6], ADC AIN[6], AC AIN[2], PTC Y[4], SERCOM0/PAD[2], or TC1/WO[0]."
},
{
"number": "8",
"name": "PA07",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA supply; EXTINT[7], ADC AIN[7], AC AIN[3], PTC Y[5], SERCOM0/PAD[3], or TC1/WO[1]."
},
{
"number": "9",
"name": "VDDANA",
"type": "power_in",
"description": "Analog supply, 1.62V to 3.63V, powering the ADC, AC, DAC, PTC and 32 kHz oscillators; internally connected to VDDIO in this package."
},
{
"number": "10",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "11",
"name": "PA08",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply with I2C-capable pad; NMI, ADC AIN[16], PTC X[0], SERCOM0/PAD[0], SERCOM2/PAD[0], or TC0/WO[0]."
},
{
"number": "12",
"name": "PA09",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply with I2C-capable pad; EXTINT[9], ADC AIN[17], PTC X[1], SERCOM0/PAD[1], SERCOM2/PAD[1], or TC0/WO[1]."
},
{
"number": "13",
"name": "PA10",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[10], ADC AIN[18], PTC X[2], SERCOM0/PAD[2], SERCOM2/PAD[2], TC1/WO[0], or GCLK_IO[4]."
},
{
"number": "14",
"name": "PA11",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[11], ADC AIN[19], PTC X[3], SERCOM0/PAD[3], SERCOM2/PAD[3], TC1/WO[1], or GCLK_IO[5]."
},
{
"number": "15",
"name": "PA14",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[14], SERCOM2/PAD[2], TC3/WO[0], GCLK_IO[0], or XIN (crystal oscillator input)."
},
{
"number": "16",
"name": "PA15",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[15], SERCOM2/PAD[3], TC3/WO[1], GCLK_IO[1], or XOUT (crystal oscillator output)."
},
{
"number": "17",
"name": "PA16",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply with I2C-capable pad; EXTINT[0], PTC X[4], SERCOM1/PAD[0], SERCOM3/PAD[0], TC2/WO[0], or GCLK_IO[2]."
},
{
"number": "18",
"name": "PA17",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply with I2C-capable pad; EXTINT[1], PTC X[5], SERCOM1/PAD[1], SERCOM3/PAD[1], TC2/WO[1], or GCLK_IO[3]."
},
{
"number": "19",
"name": "PA18",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[2], PTC X[6], SERCOM1/PAD[2], SERCOM3/PAD[2], TC3/WO[0], or AC CMP[0]."
},
{
"number": "20",
"name": "PA19",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[3], PTC X[7], SERCOM1/PAD[3], SERCOM3/PAD[3], TC3/WO[1], or AC CMP[1]."
},
{
"number": "21",
"name": "PA22",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply with I2C-capable pad; EXTINT[6], PTC X[10], SERCOM3/PAD[0], TC4/WO[0], or GCLK_IO[6]."
},
{
"number": "22",
"name": "PA23",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply with I2C-capable pad; EXTINT[7], PTC X[11], SERCOM3/PAD[1], TC4/WO[1], or GCLK_IO[7]."
},
{
"number": "23",
"name": "PA24",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[12], SERCOM3/PAD[2], or TC5/WO[0]."
},
{
"number": "24",
"name": "PA25",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[13], SERCOM3/PAD[3], or TC5/WO[1]."
},
{
"number": "25",
"name": "PA27",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[15] or GCLK_IO[0]."
},
{
"number": "26",
"name": "RESET",
"type": "input",
"description": "Active-low external reset input with internal pull-up; low-level threshold below 0.33*VDDIO (VDDIO 1.6-2.0V) or 0.36*VDDIO (VDDIO 2.7-3.6V)."
},
{
"number": "27",
"name": "PA28",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[8] or GCLK_IO[0]."
},
{
"number": "28",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "29",
"name": "VDDCORE",
"type": "power_out",
"description": "Internal regulator output (1.2V) powering the core, memories, peripherals and DFLL48M; requires an external decoupling capacitor."
},
{
"number": "30",
"name": "VDDIN",
"type": "power_in",
"description": "Input supply of 1.62V to 3.63V powering I/O lines and the internal voltage regulator."
},
{
"number": "31",
"name": "PA30",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[10], SERCOM1/PAD[2], TC1/WO[0], GCLK_IO[0], or SWCLK serial wire debug clock (1 kΩ pull-up to VDD recommended)."
},
{
"number": "32",
"name": "PA31",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO supply; EXTINT[11], SERCOM1/PAD[3], TC1/WO[1], or SWDIO serial wire debug data (active only 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",
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"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
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"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Ordering code ATSAMD20E18A-MN decodes to VQFN (M), -40 to 105C grade (N), 32 pins, 256KB flash. The ; Pinout page 19 notes VDDIO and VDDANA are internally connected in VQFN32/TQFP32, so only VDDANA appe; Pin descriptions combine page 19 pin names with the PORT multiplexing table (pages 23-25) and the os"
],
"pages_sent": 142,
"cost_usd": 0.9444,
"at": "2026-10-30T20:34:28"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/70a692cf8b8dcfe634d1cacc20eac2ef.pdf",
"pages": 731,
"sha256": "2505526f248dd8c2",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 33,
"described": 33,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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"up": "Z",
"units": "mm",
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"seat": "z = 0",
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5,
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0.875
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
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"role": "eda",
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"units": "mm",
"origin": "footprint origin = pad-pattern centre",
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"sha256": "bc56a40b27e43338e8ea4ec097341ccb6e9350692f06ff8e4529e77ee0350fbb",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
],
"package_dims": {
"package_code": "S8B",
"source_page": 681,
"D": {
"nom_mm": 5,
"range_mm": [
null,
null
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},
"E1": {
"nom_mm": 5,
"range_mm": [
null,
null
]
},
"e": {
"nom_mm": 0.5,
"range_mm": [
null,
null
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},
"A": {
"nom_mm": 0.9,
"range_mm": [
0.8,
1
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},
"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
"model_check": {
"file": "atsamd20e18a-mn.step",
"verdict": "PASS",
"reasons": [
"height within the datasheet's package drawing"
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"by": "factory/package_fit.py"
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},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "QFN-32-EP(5x5)",
"Category": "Embedded Processors & Controllers",
"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": 551,
"doc": "ds.pdf",
"plating": "tin"
},
"version": 1,
"datasheet_sha256": "2505526f248dd8c23aabdc491b9b5da747f7fff422847d44011ba7a789334228"
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"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "2505526f248dd8c23aabdc491b9b5da747f7fff422847d44011ba7a789334228",
"rows": [
{
"name": "Operating supply voltage",
"symbol": "VDD",
"kind": "recommended_operating",
"unit": "V",
"min": 1.62,
"typ": null,
"max": 3.63,
"conditions": "-40°C to +85°C, DC up to 48 MHz (also -40°C to +105°C, DC up to 32 MHz)",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Operating supply voltage (VDDIO, VDDIN, VDDANA)",
"symbol": "VDD",
"kind": "recommended_operating",
"unit": "V",
"min": 1.62,
"typ": null,
"max": 3.63,
"conditions": "same voltage must be applied to VDDIN, VDDIO and VDDANA",
"source_page": 27,
"source": "datasheet"
},
{
"name": "Maximum CPU frequency",
"symbol": "",
"kind": "recommended_operating",
"unit": "MHz",
"min": null,
"typ": null,
"max": 48,
"conditions": "1.62V-3.63V, -40°C to +85°C",
"source_page": 1,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
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"discovery_triggers": [
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"discovery_pitch": "ATSAMD20E18A-MN (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
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