component
ATSAML21J18B-MUT
Public Made by Adomby adom
Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), QFN-64-EP(9x9). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "atsaml21j18b-mut",
"version": "0.1.0",
"type": "component",
"description": "Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), QFN-64-EP(9x9). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"single chip microcomputer-microcontroller",
"atsaml21j18b-mut",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"atsaml21j18b-mut.kicad_sym",
"atsaml21j18b-mut.kicad_mod",
"atsaml21j18b-mut.glb",
"atsaml21j18b-mut.step",
"atsaml21j18b-mut.lbr",
"docs/hero.png",
"docs/atsaml21j18b-mut-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"atsaml21j18b-mut-hero.glb",
"atsaml21j18b-mut-hero.overlay.json",
"atsaml21j18b-mut-etched.glb"
],
"component": {
"mpn": "ATSAML21J18B-MUT",
"manufacturer": "Microchip Tech",
"package": "QFN-64-EP(9x9)",
"pin_count": 65,
"category": "Single Chip Microcomputer/Microcontroller",
"subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/41942ba97f76aad6042188ffe9080a2f.pdf",
"parts": {
"symbol": "atsaml21j18b-mut.kicad_sym",
"footprint": "atsaml21j18b-mut.kicad_mod",
"model_3d": "atsaml21j18b-mut-hero.glb",
"model_3d_plain": "atsaml21j18b-mut-etched.glb",
"model_3d_step": "atsaml21j18b-mut-etched.step",
"model_3d_step_plain": "atsaml21j18b-mut.step",
"lbr": "atsaml21j18b-mut.lbr"
},
"distributor_links": {
"lcsc": "C2053754",
"digikey": "ATSAML21J18B-MUTTR-ND",
"mouser": "556-ATSAML21J18B-MUT"
},
"distributor_check": {
"checked_at": "2026-10-31T18:42:27Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATSAML21J18B-MUTTR-ND",
"status": "found"
},
"mouser": {
"pn": "556-ATSAML21J18B-MUT",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PA00",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[0]/EXTWAKE[0] and multiplexed peripheral functions; it is a backup-domain pin and doubles as XIN32 when the 32 kHz oscillator is used."
},
{
"number": "2",
"name": "PA01",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[1]/EXTWAKE[1] and multiplexed peripheral functions; it is a backup-domain pin and doubles as XOUT32 when the 32 kHz oscillator is used."
},
{
"number": "3",
"name": "PA02",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[2] and analog input AIN[0]/Y[0]/VOUT[0]; analog function is selected via peripheral function B."
},
{
"number": "4",
"name": "PA03",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[3] and analog input AIN[1]/Y[1]/VREFA; analog function is selected via peripheral function B."
},
{
"number": "5",
"name": "PB04",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[4] and analog inputs AIN[12]/Y[10]; supplied from VDDANA."
},
{
"number": "6",
"name": "PB05",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[5] and analog inputs AIN[13]/Y[11]/OA_NEG[1]; supplied from VDDANA."
},
{
"number": "7",
"name": "GNDANA",
"type": "power_in",
"description": "Ground for the analog power domain."
},
{
"number": "8",
"name": "VDDANA",
"type": "power_in",
"description": "Analog supply voltage of 1.6 V to 3.6 V (per the power connection table)."
},
{
"number": "9",
"name": "PB06",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[6] and analog inputs AIN[14]/Y[12]/OA_NEG[2]; supplied from VDDANA."
},
{
"number": "10",
"name": "PB07",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[7] and analog inputs AIN[15]/Y[13]; supplied from VDDANA."
},
{
"number": "11",
"name": "PB08",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[8], analog input AIN[2] and OA_OUT[1]; supplied from VDDANA."
},
{
"number": "12",
"name": "PB09",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[9], analog input AIN[3] and Y[15]/OA_POS[1]; supplied from VDDANA."
},
{
"number": "13",
"name": "PA04",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[4]/EXTWAKE[4] and analog inputs AIN[4]/AIN[0]/VREFB; supplied from VDDANA."
},
{
"number": "14",
"name": "PA05",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[5]/EXTWAKE[5] and analog inputs AIN[5]/AIN[1]/VOUT[1]; supplied from VDDANA."
},
{
"number": "15",
"name": "PA06",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[6]/EXTWAKE[6] and analog inputs AIN[6]/AIN[2]/Y[4]; supplied from VDDANA."
},
{
"number": "16",
"name": "PA07",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[7]/EXTWAKE[7] and analog inputs AIN[7]/AIN[3]/OA_OUT[0]; supplied from VDDANA."
},
{
"number": "17",
"name": "PA08",
"type": "bidirectional",
"description": "Port A general-purpose I/O with NMI, analog input AIN[16]/X[0]/Y[6], and SERCOM I2C-capable pad; a High Sink pin per the electrical characteristics, supplied from VDDIO."
},
{
"number": "18",
"name": "PA09",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[9], analog input AIN[17]/X[1]/Y[7], and SERCOM I2C-capable pad; a High Sink pin, supplied from VDDIO."
},
{
"number": "19",
"name": "PA10",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[10], analog input AIN[18]/X[2]/Y[8] and multiplexed peripheral functions; supplied from VDDIO."
},
{
"number": "20",
"name": "PA11",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[11], analog input AIN[19]/X[3]/Y[9] and multiplexed peripheral functions; supplied from VDDIO."
},
{
"number": "21",
"name": "VDDIO",
"type": "power_in",
"description": "Digital I/O supply voltage of 1.6 V to 3.6 V."
},
{
"number": "22",
"name": "GND",
"type": "power_in",
"description": "Ground for the digital domain."
},
{
"number": "23",
"name": "PB10",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[10], Y[2] and multiplexed peripheral functions; supplied from VDDIO."
},
{
"number": "24",
"name": "PB11",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[11], Y[3] and multiplexed peripheral functions; supplied from VDDIO."
},
{
"number": "25",
"name": "PB12",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[12], X[12]/Y[5] and I2C-capable SERCOM pad; I2C Standard/Fast mode output low current is limited, supplied from VDDIO."
},
{
"number": "26",
"name": "PB13",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[13], X[13]/Y[14] and I2C-capable SERCOM pad; I2C Standard/Fast mode output low current is limited, supplied from VDDIO."
},
{
"number": "27",
"name": "PB14",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[14], X[14] and multiplexed peripheral functions; supplied from VDDIO."
},
{
"number": "28",
"name": "PB15",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[15], X[15] and multiplexed peripheral functions; supplied from VDDIO."
},
{
"number": "29",
"name": "PA12",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[12], SERCOM pad and AC/CMP[0]; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIO."
},
{
"number": "30",
"name": "PA13",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[13], SERCOM pad and AC/CMP[1]; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIO."
},
{
"number": "31",
"name": "PA14",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[14] and multiplexed peripheral functions; doubles as XOSC XIN when the external crystal oscillator is used, supplied from VDDIO."
},
{
"number": "32",
"name": "PA15",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[15] and multiplexed peripheral functions; doubles as XOSC XOUT when the external crystal oscillator is used, supplied from VDDIO."
},
{
"number": "33",
"name": "GND",
"type": "power_in",
"description": "Ground for the digital domain."
},
{
"number": "34",
"name": "VDDIO",
"type": "power_in",
"description": "Digital I/O supply voltage of 1.6 V to 3.6 V."
},
{
"number": "35",
"name": "PA16",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[0], analog input X[4] and I2C-capable SERCOM pad; supplied from VDDIO."
},
{
"number": "36",
"name": "PA17",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[1], analog input X[5] and I2C-capable SERCOM pad; a High Sink pin, supplied from VDDIO."
},
{
"number": "37",
"name": "PA18",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[2], analog input X[6] and AC/CMP[0]; supplied from VDDIO."
},
{
"number": "38",
"name": "PA19",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[3], analog input X[7] and AC/CMP[1]; supplied from VDDIO."
},
{
"number": "39",
"name": "PB16",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[0] and SERCOM5 pad; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIO."
},
{
"number": "40",
"name": "PB17",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[1] and SERCOM5 pad; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIO."
},
{
"number": "41",
"name": "PA20",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[4], analog input X[8] and SERCOM pad; supplied from VDDIO."
},
{
"number": "42",
"name": "PA21",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[5], analog input X[9] and SERCOM pad; supplied from VDDIO."
},
{
"number": "43",
"name": "PA22",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[6], analog input X[10] and I2C-capable SERCOM pad; a High Sink pin, supplied from VDDIO."
},
{
"number": "44",
"name": "PA23",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[7], analog input X[11] and I2C-capable SERCOM pad; a High Sink pin, supplied from VDDIO."
},
{
"number": "45",
"name": "PA24",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[12] and USB DM; pull resistance is 50-150 kΩ on this pin, supplied from VDDIO."
},
{
"number": "46",
"name": "PA25",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[13] and USB DP; pull resistance is 50-150 kΩ on this pin, supplied from VDDIO."
},
{
"number": "47",
"name": "GND",
"type": "power_in",
"description": "Ground for the digital domain."
},
{
"number": "48",
"name": "VDDIO",
"type": "power_in",
"description": "Digital I/O supply voltage of 1.6 V to 3.6 V."
},
{
"number": "49",
"name": "PB22",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[6] and SERCOM5 pad; supplied from VDDIN."
},
{
"number": "50",
"name": "PB23",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[7] and SERCOM5 pad; supplied from VDDIN."
},
{
"number": "51",
"name": "PA27",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[15] and GCLK_IO[0]; a High Sink pin, supplied from VDDIN."
},
{
"number": "52",
"name": "RESET",
"type": "input",
"description": "External active-low reset input with an internal pull-up resistor."
},
{
"number": "53",
"name": "VSW",
"type": "passive",
"description": "Switching regulator output in switching mode, connected to VDDCORE via a 10 µH inductor; not connected in linear regulator mode."
},
{
"number": "54",
"name": "GND",
"type": "power_in",
"description": "Ground for the digital domain."
},
{
"number": "55",
"name": "VDDCORE",
"type": "passive",
"description": "Core supply voltage of 0.9 V to 1.2 V typical; output of the internal regulator in linear mode, input when switching mode is used."
},
{
"number": "56",
"name": "VDDIN",
"type": "power_in",
"description": "Input supply voltage of 1.6 V to 3.6 V for the regulator and the VDDIN GPIO cluster."
},
{
"number": "57",
"name": "PA30",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[10] and SWCLK debug function; supplied from VDDIN."
},
{
"number": "58",
"name": "PA31",
"type": "bidirectional",
"description": "Port A general-purpose I/O with EXTINT[11] and SWDIO debug function; a High Sink pin, supplied from VDDIN."
},
{
"number": "59",
"name": "PB30",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[14] and SERCOM5 pad; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIN."
},
{
"number": "60",
"name": "PB31",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[15] and SERCOM5 pad; I2C-capable with limited output low current in I2C Sm/Fm, supplied from VDDIN."
},
{
"number": "61",
"name": "PB00",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[0] and analog input AIN[8]; a backup-domain pin supplied from VSWOUT."
},
{
"number": "62",
"name": "PB01",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[1] and analog input AIN[9]; a backup-domain pin supplied from VSWOUT."
},
{
"number": "63",
"name": "PB02",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[2] and analog input AIN[10]; a backup-domain pin supplied from VSWOUT."
},
{
"number": "64",
"name": "PB03",
"type": "bidirectional",
"description": "Port B general-purpose I/O with EXTINT[3] and analog input AIN[11]; also the VBAT battery supply input when used for battery backup."
},
{
"number": "65",
"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 datasheet gives no separate QFN64 drawing; the pin numbers below come from the 64-pin pinout fig"
],
"pages_sent": 119,
"cost_usd": 0.1681,
"at": "2026-10-31T18:42:12"
},
"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": 65,
"described": 65,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "atsaml21j18b-mut.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
9.0,
9.0,
0.75
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "dce07a86ec3fe3ca87eebdff13827f55e036ced5518fee01f85cec4a3f56366d",
"checked": "2026-10-31",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atsaml21j18b-mut-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
9.0,
9.0,
0.75
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "80a89744b20f90d76ef7be2ed8740e757813a827d2f48b4c8be2df69b31ec1e6",
"checked": "2026-10-31",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}