component
ATSAMD21G16B-MU
Public Made by Adomby adom
Microchip Tech Pre-ordered MCUs, QFN-48-EP(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613
{
"schema_version": 1,
"type": "component",
"slug": "atsamd21g16b-mu",
"title": "ATSAMD21G16B-MU",
"brief": "Microchip Tech Pre-ordered MCUs, QFN-48-EP(7x7). 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",
"embedded processors & controllers",
"atsamd21g16b-mu",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "ATSAMD21G16B-MU",
"manufacturer": "Microchip Tech",
"package": "QFN-48-EP(7x7)",
"pin_count": 49,
"category": "Embedded Processors & Controllers",
"subcategory": "Pre-ordered MCUs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/d70e0a926271e38a2611b8b6dcc19c07.pdf",
"parts": {
"symbol": "atsamd21g16b-mu.kicad_sym",
"footprint": "atsamd21g16b-mu.kicad_mod",
"model_3d": "atsamd21g16b-mu-hero.glb",
"model_3d_plain": "atsamd21g16b-mu-etched.glb",
"model_3d_step": "atsamd21g16b-mu-etched.step",
"model_3d_step_plain": "atsamd21g16b-mu.step",
"lbr": "atsamd21g16b-mu.lbr"
},
"distributor_links": {
"lcsc": "C614467",
"digikey": "ATSAMD21G16B-MU-ND",
"mouser": "556-ATSAMD21G16B-MU"
},
"distributor_check": {
"checked_at": "2026-10-30T20:33:42Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATSAMD21G16B-MU-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "556-ATSAMD21G16B-MU",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PA00",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[0], SERCOM1/PAD[0] and TCC2/WO[0] functions, and XIN32 for the 32kHz crystal oscillator."
},
{
"number": "2",
"name": "PA01",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[1], SERCOM1/PAD[1] and TCC2/WO[1] functions, and XOUT32 for the 32kHz crystal oscillator."
},
{
"number": "3",
"name": "PA02",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[2], ADC AIN[0], PTC Y[0] and DAC VOUT functions."
},
{
"number": "4",
"name": "PA03",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[3], ADC/DAC VREFA, ADC AIN[1] and PTC Y[1] functions."
},
{
"number": "5",
"name": "GNDANA",
"type": "power_in",
"description": "Analog ground; supplies the VDDANA I/O cluster."
},
{
"number": "6",
"name": "VDDANA",
"type": "power_in",
"description": "Analog supply for the analog I/O pins (PA00-PA07, PB00-PB05, PB08-PB09)."
},
{
"number": "7",
"name": "PB08",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[8], ADC AIN[2], PTC Y[14], SERCOM4/PAD[0] and TC4/WO[0] functions."
},
{
"number": "8",
"name": "PB09",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[9], ADC AIN[3], PTC Y[15], SERCOM4/PAD[1] and TC4/WO[1] functions."
},
{
"number": "9",
"name": "PA04",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[4], ADC VREFB, ADC AIN[4], AC AIN[0], PTC Y[2], SERCOM0/PAD[0] and TCC0/WO[0] functions."
},
{
"number": "10",
"name": "PA05",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[5], ADC AIN[5], AC AIN[1], PTC Y[3], SERCOM0/PAD[1] and TCC0/WO[1] functions."
},
{
"number": "11",
"name": "PA06",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[6], ADC AIN[6], AC AIN[2], PTC Y[4], SERCOM0/PAD[2] and TCC1/WO[0] functions."
},
{
"number": "12",
"name": "PA07",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[7], ADC AIN[7], AC AIN[3], PTC Y[5], SERCOM0/PAD[3], TCC1/WO[1] and I2S SD[0] functions."
},
{
"number": "13",
"name": "PA08",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with NMI, ADC AIN[16], PTC X[0], SERCOM0/2 PAD[0] and TCC0/WO[0] functions; supports I2C mode."
},
{
"number": "14",
"name": "PA09",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[9], ADC AIN[17], PTC X[1], SERCOM0/2 PAD[1] and TCC0/WO[1] functions; supports I2C mode."
},
{
"number": "15",
"name": "PA10",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[10], ADC AIN[18], PTC X[2], SERCOM0/2 PAD[2], TCC1/WO[0] and GCLK_IO[4] functions."
},
{
"number": "16",
"name": "PA11",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[11], ADC AIN[19], PTC X[3], SERCOM0/2 PAD[3], TCC1/WO[1] and GCLK_IO[5] functions."
},
{
"number": "17",
"name": "VDDIO",
"type": "power_in",
"description": "Digital I/O supply for the I/O pins of this cluster (PA08-PA15, PB10-PB11)."
},
{
"number": "18",
"name": "GND",
"type": "power_in",
"description": "Ground for the digital I/O supply."
},
{
"number": "19",
"name": "PB10",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[10], SERCOM4/PAD[2], TC5/WO[0], TCC0/WO[4], I2S MCK[1] and GCLK_IO[4] functions."
},
{
"number": "20",
"name": "PB11",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[11], SERCOM4/PAD[3], TC5/WO[1], TCC0/WO[5], I2S SCK[1] and GCLK_IO[5] functions."
},
{
"number": "21",
"name": "PA12",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[12], SERCOM2/PAD[0], SERCOM4/PAD[0], TCC2/WO[0], TCC0/WO[6] and AC CMP[0] functions; supports I2C mode."
},
{
"number": "22",
"name": "PA13",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[13], SERCOM2/PAD[1], SERCOM4/PAD[1], TCC2/WO[1], TCC0/WO[7] and AC CMP[1] functions; supports I2C mode."
},
{
"number": "23",
"name": "PA14",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[14], SERCOM2/PAD[2], TC3/WO[0] and GCLK_IO[0] functions, and XIN for the crystal oscillator."
},
{
"number": "24",
"name": "PA15",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[15], SERCOM2/PAD[3], TC3/WO[1] and GCLK_IO[1] functions, and XOUT for the crystal oscillator."
},
{
"number": "25",
"name": "PA16",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[0], PTC X[4], SERCOM1/3 PAD[0], TCC2/WO[0], TCC0/WO[6] and GCLK_IO[2] functions; supports I2C mode."
},
{
"number": "26",
"name": "PA17",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[1], PTC X[5], SERCOM1/3 PAD[1], TCC2/WO[1], TCC0/WO[7] and GCLK_IO[3] functions; supports I2C mode."
},
{
"number": "27",
"name": "PA18",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[2], PTC X[6], SERCOM1/3 PAD[2], TC3/WO[0], TCC0/WO[2] and AC CMP[0] functions."
},
{
"number": "28",
"name": "PA19",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[3], PTC X[7], SERCOM1/3 PAD[3], TC3/WO[1], TCC0/WO[3], I2S SD[0] and AC CMP[1] functions."
},
{
"number": "29",
"name": "PA20",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[4], PTC X[8], SERCOM5/3 PAD[2], TC7/WO[0], TCC0/WO[6], I2S SCK[0] and GCLK_IO[4] functions."
},
{
"number": "30",
"name": "PA21",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[5], PTC X[9], SERCOM5/3 PAD[3], TC7/WO[1], TCC0/WO[7], I2S FS[0] and GCLK_IO[5] functions."
},
{
"number": "31",
"name": "PA22",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[6], PTC X[10], SERCOM3/5 PAD[0], TC4/WO[0], TCC0/WO[4] and GCLK_IO[6] functions; supports I2C mode."
},
{
"number": "32",
"name": "PA23",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[7], PTC X[11], SERCOM3/5 PAD[1], TC4/WO[1], TCC0/WO[5], USB SOF 1kHz and GCLK_IO[7] functions; supports I2C mode."
},
{
"number": "33",
"name": "PA24",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[12], SERCOM3/5 PAD[2], TC5/WO[0], TCC1/WO[2] and USB DM functions; a pull-up is recommended if unconnected."
},
{
"number": "34",
"name": "PA25",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[13], SERCOM3/5 PAD[3], TC5/WO[1], TCC1/WO[3] and USB DP functions; a pull-up is recommended if unconnected."
},
{
"number": "35",
"name": "GND",
"type": "power_in",
"description": "Ground for the digital I/O supply."
},
{
"number": "36",
"name": "VDDIO",
"type": "power_in",
"description": "Digital I/O supply for the I/O pins of this cluster (PA16-PA25, PB22-PB23, PA27-PA28)."
},
{
"number": "37",
"name": "PB22",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[6], SERCOM5/PAD[2], TC7/WO[0], TCC3/WO[0] and GCLK_IO[0] functions."
},
{
"number": "38",
"name": "PB23",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[7], SERCOM5/PAD[3], TC7/WO[1], TCC3/WO[1] and GCLK_IO[1] functions."
},
{
"number": "39",
"name": "PA27",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[15], TCC3/WO[6] and GCLK_IO[0] functions."
},
{
"number": "40",
"name": "RESET",
"type": "input",
"description": "External reset input, active low."
},
{
"number": "41",
"name": "PA28",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[8], TCC3/WO[7] and GCLK_IO[0] functions."
},
{
"number": "42",
"name": "GND",
"type": "power_in",
"description": "Ground for the VDDIN supply."
},
{
"number": "43",
"name": "VDDCORE",
"type": "power_out",
"description": "Regulated output supply for the core."
},
{
"number": "44",
"name": "VDDIN",
"type": "power_in",
"description": "Input supply for the device and internal voltage regulator."
},
{
"number": "45",
"name": "PA30",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[10], SERCOM1/PAD[2], TCC1/WO[0], TCC3/WO[4], GCLK_IO[0] and SWCLK (serial wire debug clock) functions."
},
{
"number": "46",
"name": "PA31",
"type": "bidirectional",
"description": "General-purpose I/O on VDDIO with EXTINT[11], SERCOM1/PAD[3], TCC1/WO[1] and TCC3/WO[5] functions; SWDIO is active only when a debugger is present."
},
{
"number": "47",
"name": "PB02",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[2], ADC AIN[10], PTC Y[8], SERCOM5/PAD[0], TC6/WO[0] and TCC3/WO[2] functions."
},
{
"number": "48",
"name": "PB03",
"type": "bidirectional",
"description": "General-purpose I/O on VDDANA with EXTINT[3], ADC AIN[11], PTC Y[9], SERCOM5/PAD[1], TC6/WO[1] and TCC3/WO[3] functions."
},
{
"number": "49",
"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 package hint says QFN-48-EP, but the supplied pinout page (QFN48/TQFP48, SAM D21GxxA/B/D) number; On the pinout figure, the label for pin 30 is displaced to the top of the drawing, so I read it as P; Pin types are inferred from function and not printed in the pinout. VDDCORE is typed power_out as th"
],
"pages_sent": 118,
"cost_usd": 0.9499,
"at": "2026-10-30T20:33:34"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/d70e0a926271e38a2611b8b6dcc19c07.pdf",
"pages": 1148,
"sha256": "18ca1ccab5aa330f",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 49,
"described": 49,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "atsamd21g16b-mu.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
7,
7,
0.77
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "f2b38b0b4bf967c77e683e8d4599608b9f0503055ec535b93c4ebb5d0163e916",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atsamd21g16b-mu-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
7,
7,
0.77
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "bdbbb2ec71dc54dfc446717cb46535778f385207ff32d252e74d14d3d586d2ed",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
],
"package_dims": {
"package_code": "T3B",
"source_page": 1073,
"D": {
"nom_mm": 7,
"range_mm": [
null,
null
]
},
"E1": {
"nom_mm": 7,
"range_mm": [
null,
null
]
},
"e": {
"nom_mm": 0.5,
"range_mm": [
null,
null
]
},
"A": {
"nom_mm": 0.85,
"range_mm": [
0.8,
0.9
]
},
"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
"model_check": {
"file": "atsamd21g16b-mu.step",
"verdict": "PASS",
"reasons": [
"height within the datasheet's package drawing"
],
"by": "factory/package_fit.py"
}
}
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "QFN-48-EP(7x7)",
"Category": "Embedded Processors & Controllers",
"Pins": "49"
},
"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": 859,
"doc": "ds.pdf",
"plating": "tin"
},
"version": 1,
"datasheet_sha256": "18ca1ccab5aa330f16dfb0b24f5acf9e817998f61734ccad9f56657d409a708b"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "18ca1ccab5aa330f16dfb0b24f5acf9e817998f61734ccad9f56657d409a708b",
"rows": [
{
"name": "Operating voltage (SAM D21)",
"symbol": "VDD",
"kind": "recommended_operating",
"unit": "V",
"min": 1.62,
"typ": null,
"max": 3.63,
"conditions": "SAM D21: 1.62V – 3.63V",
"source_page": 2,
"source": "datasheet"
},
{
"name": "VDDIO supply voltage",
"symbol": "VDDIO",
"kind": "recommended_operating",
"unit": "V",
"min": 1.62,
"typ": null,
"max": 3.63,
"conditions": "Powers I/O lines, OSC8M and XOSC",
"source_page": 35,
"source": "datasheet"
},
{
"name": "VDDIN supply voltage",
"symbol": "VDDIN",
"kind": "recommended_operating",
"unit": "V",
"min": 1.62,
"typ": null,
"max": 3.63,
"conditions": "Powers I/O lines and the internal regulator",
"source_page": 35,
"source": "datasheet"
},
{
"name": "VDDANA supply voltage",
"symbol": "VDDANA",
"kind": "recommended_operating",
"unit": "V",
"min": 1.62,
"typ": null,
"max": 3.63,
"conditions": "Powers I/O lines and the ADC, AC, DAC, PTC, OSCULP32K, OSC32K, XOSC32K",
"source_page": 35,
"source": "datasheet"
},
{
"name": "Operating temperature (U grade)",
"symbol": "",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "U = -40 - 85°C Matte Sn Plating",
"source_page": 16,
"source": "datasheet"
},
{
"name": "CPU clock frequency",
"symbol": "Fmax",
"kind": "recommended_operating",
"unit": "MHz",
"min": null,
"typ": null,
"max": 48,
"conditions": "Arm Cortex-M0+ CPU running at up to 48 MHz",
"source_page": 1,
"source": "datasheet"
},
{
"name": "VDDCORE regulated output voltage",
"symbol": "VDDCORE",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 1.2,
"max": null,
"conditions": "Internal regulated voltage output",
"source_page": 35,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"atsamd21g16b-mu"
],
"discovery_pitch": "ATSAMD21G16B-MU (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"atsamd21g16b-mu.kicad_sym",
"atsamd21g16b-mu.kicad_mod",
"atsamd21g16b-mu.glb",
"atsamd21g16b-mu.step",
"atsamd21g16b-mu.lbr",
"docs/hero.png",
"docs/atsamd21g16b-mu-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"atsamd21g16b-mu-hero.glb",
"atsamd21g16b-mu-hero.overlay.json",
"atsamd21g16b-mu-etched.glb"
],
"visibility": {
"public": true
}
}