component
ATSAMC21E18A-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": "atsamc21e18a-mut",
"title": "ATSAMC21E18A-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",
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"single chip microcomputer-microcontroller",
"atsamc21e18a-mut",
"factory-2.0.0",
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"component": {
"mpn": "ATSAMC21E18A-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/7ca0693ab79435b34d08da2f9e2ec965.pdf",
"parts": {
"symbol": "atsamc21e18a-mut.kicad_sym",
"footprint": "atsamc21e18a-mut.kicad_mod",
"model_3d": "atsamc21e18a-mut-hero.glb",
"model_3d_plain": "atsamc21e18a-mut-etched.glb",
"model_3d_step": "atsamc21e18a-mut-etched.step",
"model_3d_step_plain": "atsamc21e18a-mut.step",
"lbr": "atsamc21e18a-mut.lbr"
},
"distributor_links": {
"lcsc": "C2053333",
"digikey": "ATSAMC21E18A-MUTTR-ND",
"mouser": "556-ATSAMC21E18A-MUT"
},
"distributor_check": {
"checked_at": "2026-10-30T16:11:51Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATSAMC21E18A-MUTTR-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "556-ATSAMC21E18A-MUT",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PA00",
"type": "bidirectional",
"description": "General-purpose I/O PA00 on the VDDANA domain, also usable as XIN32 (32.768 kHz crystal input) and EXTINT[0], SERCOM1/PAD[0], TCC2/WO[0] and CMP[2] per the multiplexing tables."
},
{
"number": "2",
"name": "PA01",
"type": "bidirectional",
"description": "General-purpose I/O PA01 on the VDDANA domain, also usable as XOUT32 (32.768 kHz crystal output) and EXTINT[1], SERCOM1/PAD[1], TCC2/WO[1] and CMP[3]."
},
{
"number": "3",
"name": "PA02",
"type": "bidirectional",
"description": "General-purpose I/O PA02 on the VDDANA domain, also usable as analog input AIN[0] and AIN[4], PTC Y[0], DAC output VOUT and EXTINT[2]."
},
{
"number": "4",
"name": "PA03",
"type": "bidirectional",
"description": "General-purpose I/O PA03 on the VDDANA domain, also usable as analog input AIN[1] and AIN[5], PTC Y[1], ADC/DAC reference VREFA and EXTINT[3]."
},
{
"number": "5",
"name": "PA04",
"type": "bidirectional",
"description": "General-purpose I/O PA04 on the VDDANA domain, also usable as analog input AIN[4]/AIN[0], SDADC reference VREFB, PTC Y[2], SERCOM0/PAD[0], TCC0/WO[0] and EXTINT[4]."
},
{
"number": "6",
"name": "PA05",
"type": "bidirectional",
"description": "General-purpose I/O PA05 on the VDDANA domain, also usable as analog input AIN[5]/AIN[1], PTC Y[3], SERCOM0/PAD[1], TCC0/WO[1] and EXTINT[5]."
},
{
"number": "7",
"name": "PA06",
"type": "bidirectional",
"description": "General-purpose I/O PA06 on the VDDANA domain, also usable as analog input AIN[6]/AIN[2], negative SDADC input AINN[0], PTC Y[4], SERCOM0/PAD[2], TCC1/WO[0] and EXTINT[6]."
},
{
"number": "8",
"name": "PA07",
"type": "bidirectional",
"description": "General-purpose I/O PA07 on the VDDANA domain, also usable as analog input AIN[7]/AIN[3], positive SDADC input AINP[0], PTC Y[5], SERCOM0/PAD[3], TCC1/WO[1] and EXTINT[7]."
},
{
"number": "9",
"name": "VDDANA",
"type": "power_in",
"description": "Analog supply input for the VDDANA pin domain, with the device operating range stated as 2.7 V to 5.5 V."
},
{
"number": "10",
"name": "GND",
"type": "power_in",
"description": "Ground reference pin of the device."
},
{
"number": "11",
"name": "PA08",
"type": "bidirectional",
"description": "General-purpose I/O PA08 on the VDDIO domain, also usable as NMI, analog input AIN[8], PTC X[0]/Y[16], SERCOM0/PAD[0], SERCOM2/PAD[0], TCC0/WO[0] and CCL1/IN[3]; one of the 32-pin SERCOM I2C-capable pins."
},
{
"number": "12",
"name": "PA09",
"type": "bidirectional",
"description": "General-purpose I/O PA09 on the VDDIO domain, also usable as EXTINT[9], analog input AIN[9], PTC X[1]/Y[17], SERCOM0/PAD[1], SERCOM2/PAD[1], TCC0/WO[1] and CCL1/IN[4]; one of the 32-pin SERCOM I2C-capable pins."
},
{
"number": "13",
"name": "PA10",
"type": "bidirectional",
"description": "General-purpose I/O PA10 on the VDDIO domain, also usable as EXTINT[10], analog input AIN[10], PTC X[2]/Y[18], SERCOM0/PAD[2], SERCOM2/PAD[2], TCC1/WO[0], TCC0/WO[2] and GCLK_IO[4]."
},
{
"number": "14",
"name": "PA11",
"type": "bidirectional",
"description": "General-purpose I/O PA11 on the VDDIO domain, also usable as EXTINT[11], analog input AIN[11], PTC X[3]/Y[19], SERCOM0/PAD[3], SERCOM2/PAD[3], TCC1/WO[1], TCC0/WO[3] and GCLK_IO[5]."
},
{
"number": "15",
"name": "PA14",
"type": "bidirectional",
"description": "General-purpose I/O PA14 on the VDDIO domain, also usable as XIN (0.4-32 MHz crystal oscillator input), EXTINT[14], SERCOM2/PAD[2], SERCOM4/PAD[2], TC4/WO[0], TCC0/WO[4] and GCLK_IO[0]."
},
{
"number": "16",
"name": "PA15",
"type": "bidirectional",
"description": "General-purpose I/O PA15 on the VDDIO domain, also usable as XOUT (0.4-32 MHz crystal oscillator output), EXTINT[15], SERCOM2/PAD[3], SERCOM4/PAD[3], TC4/WO[1], TCC0/WO[5] and GCLK_IO[1]."
},
{
"number": "17",
"name": "PA16",
"type": "bidirectional",
"description": "General-purpose I/O PA16 on the VDDIO domain, also usable as EXTINT[0], PTC X[4]/Y[20], SERCOM1/PAD[0], SERCOM3/PAD[0], TCC2/WO[0], TCC0/WO[6], GCLK_IO[2] and CCL0/IN[0]; one of the 32-pin SERCOM I2C-capable pins."
},
{
"number": "18",
"name": "PA17",
"type": "bidirectional",
"description": "General-purpose I/O PA17 on the VDDIO domain, also usable as EXTINT[1], PTC X[5]/Y[21], SERCOM1/PAD[1], SERCOM3/PAD[1], TCC2/WO[1], TCC0/WO[7], GCLK_IO[3] and CCL0/IN[1]; one of the 32-pin SERCOM I2C-capable pins."
},
{
"number": "19",
"name": "PA18",
"type": "bidirectional",
"description": "General-purpose I/O PA18 on the VDDIO domain, also usable as EXTINT[2], PTC X[6]/Y[22], SERCOM1/PAD[2], SERCOM3/PAD[2], TC4/WO[0], TCC0/WO[2], AC/CMP[0] and CCL0/IN[2]."
},
{
"number": "20",
"name": "PA19",
"type": "bidirectional",
"description": "General-purpose I/O PA19 on the VDDIO domain, also usable as EXTINT[3], PTC X[7]/Y[23], SERCOM1/PAD[3], SERCOM3/PAD[3], TC4/WO[1], TCC0/WO[3], AC/CMP[1] and CCL0/OUT[0]."
},
{
"number": "21",
"name": "PA22",
"type": "bidirectional",
"description": "General-purpose I/O PA22 on the VDDIO domain, also usable as EXTINT[6], PTC X[10]/Y[26], SERCOM3/PAD[0], SERCOM5/PAD[0], TC0/WO[0], TCC0/WO[4], GCLK_IO[6] and CCL2/IN[6]; one of the 32-pin SERCOM I2C-capable pins."
},
{
"number": "22",
"name": "PA23",
"type": "bidirectional",
"description": "General-purpose I/O PA23 on the VDDIO domain, also usable as EXTINT[7], PTC X[11]/Y[27], SERCOM3/PAD[1], SERCOM5/PAD[1], TC0/WO[1], TCC0/WO[5], GCLK_IO[7] and CCL2/IN[7]; one of the 32-pin SERCOM I2C-capable pins."
},
{
"number": "23",
"name": "PA24",
"type": "bidirectional",
"description": "General-purpose I/O PA24 on the VDDIO domain, also usable as EXTINT[12], SERCOM3/PAD[2], SERCOM5/PAD[2], TC1/WO[0], TCC1/WO[2], CAN0/TX, AC/CMP[2] and CCL2/IN[8]."
},
{
"number": "24",
"name": "PA25",
"type": "bidirectional",
"description": "General-purpose I/O PA25 on the VDDIO domain, also usable as EXTINT[13], SERCOM3/PAD[3], SERCOM5/PAD[3], TC1/WO[1], TCC1/WO[3], CAN0/RX, AC/CMP[3] and CCL2/OUT[2]."
},
{
"number": "25",
"name": "PA27",
"type": "bidirectional",
"description": "General-purpose I/O PA27 on the VDDIN domain, also usable as EXTINT[15] and GCLK_IO[0]."
},
{
"number": "26",
"name": "RESET",
"type": "input",
"description": "External active-low reset input (RESET pin) of the device."
},
{
"number": "27",
"name": "PA28",
"type": "bidirectional",
"description": "General-purpose I/O PA28 on the VDDIN domain, also usable as EXTINT[8] and GCLK_IO[0]."
},
{
"number": "28",
"name": "GND",
"type": "power_in",
"description": "Ground reference pin of the device."
},
{
"number": "29",
"name": "VDDCORE",
"type": "power_out",
"description": "Regulated output supply of the internal voltage regulator that feeds the core domain."
},
{
"number": "30",
"name": "VDDIN",
"type": "power_in",
"description": "Input supply for the VDDIN pin domain (PA27, PA28, PA30, PA31), with the device operating range stated as 2.7 V to 5.5 V."
},
{
"number": "31",
"name": "PA30",
"type": "bidirectional",
"description": "General-purpose I/O PA30 on the VDDIN domain, also usable as the SWCLK Serial Wire Debug clock, EXTINT[10], SERCOM1/PAD[2], TCC1/WO[0], GCLK_IO[0] and CCL1/IN[3]."
},
{
"number": "32",
"name": "PA31",
"type": "bidirectional",
"description": "General-purpose I/O PA31 on the VDDIN domain, also usable as the SWDIO Serial Wire Debug data pin, EXTINT[11], SERCOM1/PAD[3], TCC1/WO[1] and CCL1/OUT[1]."
},
{
"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-haiku-5-5",
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"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The provided text contains no package drawing for the VQFN32 (section 52.3 is not in the extract). T; Pin-to-name mapping for pins 1-32 comes from the VQFN32/TQFP32 figure in section 4.1.1 (page 21), cr; The datasheet gives no per-pin electrical limits in the extracted text; the descriptions state only ",
"exposed pad 33 added from the footprint"
],
"pages_sent": 104,
"cost_usd": 0.6112,
"at": "2026-10-30T16:11:21"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/7ca0693ab79435b34d08da2f9e2ec965.pdf",
"pages": 1206,
"sha256": "5991eaad10c5cd35",
"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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"origin": "footprint origin = pad-pattern centre",
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"zmin_mm": 0,
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"footprint_binding": "identity",
"sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
"checked": "2026-10-30",
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"package_dims": {
"package_code": "S8B",
"source_page": 1171,
"D": {
"nom_mm": 5,
"range_mm": [
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},
"E1": {
"nom_mm": 5,
"range_mm": [
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},
"e": {
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"range_mm": [
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},
"A": {
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"range_mm": [
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"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
"model_check": {
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"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": 987,
"doc": "ds.pdf",
"plating": "tin"
},
"housing": {
"quote": "10.3. Micro Trace Buffer MTB base address corrected from 0x41006000 to 0x41008000. 22. SUPC – Supply Controller 22.6.3.3. VDD Brown-Out Detector (BODVDD): Removed",
"page": 1198,
"doc": "ds.pdf",
"material": "PC"
},
"version": 1,
"datasheet_sha256": "5991eaad10c5cd3555f61fe072f9466b16bf554c42746cc968d345ce91be908e"
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"characteristics": {
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"source": "datasheet",
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"kind": "recommended_operating",
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"min": 2.7,
"typ": null,
"max": 5.5,
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"source_page": 38,
"source": "datasheet"
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{
"name": "Input supply voltage (VDDIN)",
"symbol": "VDDIN",
"kind": "recommended_operating",
"unit": "V",
"min": 2.7,
"typ": null,
"max": 5.5,
"conditions": "Powers I/O lines, OSC48M, TOSC and internal regulator; same voltage as VDDANA (VDD)",
"source_page": 38,
"source": "datasheet"
},
{
"name": "Analog supply voltage (VDDANA)",
"symbol": "VDDANA",
"kind": "recommended_operating",
"unit": "V",
"min": 2.7,
"typ": null,
"max": 5.5,
"conditions": "Powers I/O lines, ADC, AC, DAC, PTC, SDADC, OSCULP32K, OSC32K, XOSC32K; same voltage as VDDIN (VDD)",
"source_page": 38,
"source": "datasheet"
},
{
"name": "Operating temperature range, grade U",
"symbol": "",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "Ordering code grade U = -40 to 85 °C Matte Sn plating",
"source_page": 18,
"source": "datasheet"
}
]
}
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