component
ATSAML21E16B-MNT
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
Ray
Publish 0.1.1
5d3a4f2
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"type": "component",
"slug": "atsaml21e16b-mnt",
"title": "ATSAML21E16B-MNT",
"brief": "Microchip Tech Pre-ordered MCUs, QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.1",
"license": "CC-BY-SA-4.0",
"tags": [
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"embedded processors & controllers",
"atsaml21e16b-mnt",
"factory-2.0.0",
"extractor-text"
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"component": {
"mpn": "ATSAML21E16B-MNT",
"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/41942ba97f76aad6042188ffe9080a2f.pdf",
"parts": {
"symbol": "atsaml21e16b-mnt.kicad_sym",
"footprint": "atsaml21e16b-mnt.kicad_mod",
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"model_3d_plain": "atsaml21e16b-mnt.glb",
"model_3d_step": "atsaml21e16b-mnt-etched.step",
"model_3d_step_plain": "atsaml21e16b-mnt.step",
"lbr": "atsaml21e16b-mnt.lbr"
},
"distributor_links": {
"lcsc": "C1339193",
"digikey": "ATSAML21E16B-MNTTR-ND",
"mouser": "579-ATSAML21E16B-MNT"
},
"distributor_check": {
"checked_at": "2026-11-10T02:15:02Z",
"source": "Component Ocean /api/assign-pns",
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"pn": "ATSAML21E16B-MNTTR-ND",
"status": "found"
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"pn": "579-ATSAML21E16B-MNT",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PA00",
"type": "bidirectional",
"description": "General-purpose I/O (VSWOUT-supplied backup pin) with EXTINT[0]/EXTWAKE[0], XIN32 32 kHz crystal input, SERCOM1 PAD[0] and TCC2 WO[0]."
},
{
"number": "2",
"name": "PA01",
"type": "bidirectional",
"description": "General-purpose I/O (VSWOUT-supplied backup pin) with EXTINT[1]/EXTWAKE[1], XOUT32 32 kHz crystal output, SERCOM1 PAD[1] and TCC2 WO[1]."
},
{
"number": "3",
"name": "PA02",
"type": "bidirectional",
"description": "General-purpose I/O supplied by VDDANA with EXTINT[2]/EXTWAKE[2], ADC AIN[0], PTC Y[0], DAC VOUT[0] and OPAMP OA_NEG[0]."
},
{
"number": "4",
"name": "PA03",
"type": "bidirectional",
"description": "General-purpose I/O supplied by VDDANA with EXTINT[3]/EXTWAKE[3], external reference VREFA, ADC AIN[1] and PTC Y[1]."
},
{
"number": "5",
"name": "PA04",
"type": "bidirectional",
"description": "General-purpose I/O supplied by VDDANA with EXTINT[4]/EXTWAKE[4], VREFB, ADC AIN[4], AC AIN[0], OA_OUT[2], SERCOM0 PAD[0] and TCC0 WO[0]."
},
{
"number": "6",
"name": "PA05",
"type": "bidirectional",
"description": "General-purpose I/O supplied by VDDANA with EXTINT[5]/EXTWAKE[5], ADC AIN[5], AC AIN[1], DAC VOUT[1], OA_POS[2], SERCOM0 PAD[1] and TCC0 WO[1]."
},
{
"number": "7",
"name": "PA06",
"type": "bidirectional",
"description": "General-purpose I/O supplied by VDDANA with EXTINT[6]/EXTWAKE[6], ADC AIN[6], AC AIN[2], PTC Y[4], OA_POS[0], SERCOM0 PAD[2] and TCC1 WO[0]."
},
{
"number": "8",
"name": "PA07",
"type": "bidirectional",
"description": "General-purpose I/O supplied by VDDANA with EXTINT[7]/EXTWAKE[7], ADC AIN[7], AC AIN[3], OA_OUT[0], SERCOM0 PAD[3] and TCC1 WO[1]."
},
{
"number": "9",
"name": "VDDANA",
"type": "power_in",
"description": "Analog supply, 1.6V to 3.6V, with 100nF and 10µF decoupling; on SAM L21E VDDIO is electrically connected to and supplied through VDDANA."
},
{
"number": "10",
"name": "GND",
"type": "power_in",
"description": "Ground for the device."
},
{
"number": "11",
"name": "PA08",
"type": "bidirectional",
"description": "High-sink general-purpose I/O with NMI, ADC AIN[16], PTC X[0]/Y[6], SERCOM0/2 PAD[0], TCC0 WO[0] and TCC1 WO[2]; I2C Hs-capable."
},
{
"number": "12",
"name": "PA09",
"type": "bidirectional",
"description": "High-sink general-purpose I/O with EXTINT[9], ADC AIN[17], PTC X[1]/Y[7], SERCOM0/2 PAD[1], TCC0 WO[1] and TCC1 WO[3]; I2C Hs-capable."
},
{
"number": "13",
"name": "PA10",
"type": "bidirectional",
"description": "General-purpose I/O with EXTINT[10], ADC AIN[18], PTC X[2]/Y[8], SERCOM0/2 PAD[2], TCC1 WO[0], TCC0 WO[2] and GCLK_IO[4]."
},
{
"number": "14",
"name": "PA11",
"type": "bidirectional",
"description": "General-purpose I/O with EXTINT[11], ADC AIN[19], PTC X[3]/Y[9], SERCOM0/2 PAD[3], TCC1 WO[1], TCC0 WO[3] and GCLK_IO[5]."
},
{
"number": "15",
"name": "PA14",
"type": "bidirectional",
"description": "General-purpose I/O with EXTINT[14], XOSC XIN crystal/clock input, SERCOM2/4 PAD[2], TC4 WO[0], TCC0 WO[4] and GCLK_IO[0]."
},
{
"number": "16",
"name": "PA15",
"type": "bidirectional",
"description": "General-purpose I/O with EXTINT[15], XOSC XOUT crystal output, SERCOM2/4 PAD[3], TC4 WO[1], TCC0 WO[5] and GCLK_IO[1]."
},
{
"number": "17",
"name": "PA16",
"type": "bidirectional",
"description": "High-sink general-purpose I/O with EXTINT[0], PTC X[4], SERCOM1/3 PAD[0], TCC2 WO[0], TCC0 WO[6] and GCLK_IO[2]; I2C Hs-capable."
},
{
"number": "18",
"name": "PA17",
"type": "bidirectional",
"description": "High-sink general-purpose I/O with EXTINT[1], PTC X[5], SERCOM1/3 PAD[1], TCC2 WO[1], TCC0 WO[7] and GCLK_IO[3]; I2C Hs-capable."
},
{
"number": "19",
"name": "PA18",
"type": "bidirectional",
"description": "General-purpose I/O with EXTINT[2], PTC X[6], SERCOM1/3 PAD[2], TC4 WO[0], TCC0 WO[2] and AC CMP[0]."
},
{
"number": "20",
"name": "PA19",
"type": "bidirectional",
"description": "General-purpose I/O with EXTINT[3], PTC X[7], SERCOM1/3 PAD[3], TC4 WO[1], TCC0 WO[3] and AC CMP[1]."
},
{
"number": "21",
"name": "PA22",
"type": "bidirectional",
"description": "High-sink general-purpose I/O with EXTINT[6], PTC X[10], SERCOM3/5 PAD[0], TC0 WO[0], TCC0 WO[4] and GCLK_IO[6]; I2C Hs-capable."
},
{
"number": "22",
"name": "PA23",
"type": "bidirectional",
"description": "High-sink general-purpose I/O with EXTINT[7], PTC X[11], SERCOM3/5 PAD[1], TC0 WO[1], TCC0 WO[5], USB SOF 1kHz and GCLK_IO[7]; I2C Hs-capable."
},
{
"number": "23",
"name": "PA24",
"type": "bidirectional",
"description": "General-purpose I/O with EXTINT[12], SERCOM3/5 PAD[2], TC1 WO[0], TCC1 WO[2] and USB DM."
},
{
"number": "24",
"name": "PA25",
"type": "bidirectional",
"description": "General-purpose I/O with EXTINT[13], SERCOM3/5 PAD[3], TC1 WO[1], TCC1 WO[3] and USB DP."
},
{
"number": "25",
"name": "PA27",
"type": "bidirectional",
"description": "High-sink general-purpose I/O supplied by VDDIN with EXTINT[15] and 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 at 1.6-2.0V and below 0.36*VDDIO at 2.7-3.6V."
},
{
"number": "27",
"name": "VSW",
"type": "power_out",
"description": "On-chip switching regulator output; connect a 10µH inductor to VDDCORE in switching mode, leave unconnected in linear mode."
},
{
"number": "28",
"name": "GND",
"type": "power_in",
"description": "Ground for the device."
},
{
"number": "29",
"name": "VDDCORE",
"type": "power_out",
"description": "Core supply of 0.9V to 1.2V typical with 100nF and 1µF decoupling; linear mode output, or switching mode input connected to VSW via inductor."
},
{
"number": "30",
"name": "VDDIN",
"type": "power_in",
"description": "Main supply input, 1.6V to 3.6V, with 100nF and 10µF decoupling."
},
{
"number": "31",
"name": "PA30",
"type": "bidirectional",
"description": "General-purpose I/O supplied by VDDIN with EXTINT[10], SERCOM1 PAD[2], TCC1 WO[0], SWCLK (needs 1kΩ pull-up) and GCLK_IO[0]."
},
{
"number": "32",
"name": "PA31",
"type": "bidirectional",
"description": "High-sink general-purpose I/O supplied by VDDIN with EXTINT[11], SERCOM1 PAD[3], TCC1 WO[1] and SWDIO (active only with a debugger 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-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 says the QFN exposed paddle must be connected to GND (page 1123), but the text gives n; The datasheet text gives no pin type for VDDCORE. It is output in linear mode and input in switching"
],
"pages_sent": 119,
"cost_usd": 0.5922,
"at": "2026-11-10T02:14:43"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/41942ba97f76aad6042188ffe9080a2f.pdf",
"pages": 1158,
"sha256": "c7ade1efde79dc98",
"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": "atsaml21e16b-mnt.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": "2026-11-10",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atsaml21e16b-mnt-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
5,
5,
0.875
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "da3301f659b1697a8fc92bf46f6a4a850795a934c05be5d9f95ae2d47f7fc7e7",
"checked": "2026-11-10",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "QFN-32-EP(5x5)",
"Category": "Embedded Processors & Controllers",
"Pins": "33"
},
"appearance": {
"contacts": {
"quote": "indium tin oxide (ITO) sensor grids. The PTC requires one pin per X-line and one pin per Y-line. In self-capacitance mode, the PTC requires only one pin (Y-line) for each touch sensor.",
"page": 1034,
"doc": "ds.pdf",
"plating": "tin"
},
"version": 1,
"datasheet_sha256": "c7ade1efde79dc98f4121e9e7cb057088832817d557836433f1ef2ccb256cba1"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"atsaml21e16b-mnt"
],
"discovery_pitch": "ATSAML21E16B-MNT (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray"
},
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
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"README.md",
"atsaml21e16b-mnt.kicad_sym",
"atsaml21e16b-mnt.kicad_mod",
"atsaml21e16b-mnt.glb",
"atsaml21e16b-mnt.step",
"atsaml21e16b-mnt.lbr",
"docs/hero.png",
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"viewers/symbol.html",
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"atsaml21e16b-mnt-hero.glb",
"atsaml21e16b-mnt-hero.overlay.json",
"atsaml21e16b-mnt-etched.glb",
"atsaml21e16b-mnt-etched.step"
],
"visibility": "public",
"description": "Microchip Tech Pre-ordered MCUs, QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"org": "adom"
}