component
AT42QT1481-AU
Public Made by Adomby adom
Microchip Tech Touch Sensors, TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454
{
"schema_version": 1,
"type": "component",
"slug": "at42qt1481-au",
"title": "AT42QT1481-AU",
"brief": "Microchip Tech Touch Sensors, TQFP-44(10x10). 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",
"sensors",
"at42qt1481-au",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "AT42QT1481-AU",
"manufacturer": "Microchip Tech",
"package": "TQFP-44(10x10)",
"pin_count": 44,
"category": "Sensors",
"subcategory": "Touch Sensors",
"datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-9621-AT42-QT1481_Datasheet.pdf",
"parts": {
"symbol": "at42qt1481-au.kicad_sym",
"footprint": "at42qt1481-au.kicad_mod",
"model_3d": "at42qt1481-au-hero.glb",
"model_3d_plain": "at42qt1481-au-etched.glb",
"model_3d_step": "at42qt1481-au-etched.step",
"model_3d_step_plain": "at42qt1481-au.step",
"lbr": "at42qt1481-au.lbr"
},
"distributor_links": {
"lcsc": "C1522269",
"digikey": "AT42QT1481-AU-ND",
"mouser": "556-AT42QT1481-AU"
},
"distributor_check": {
"checked_at": "2026-10-28T15:47:37Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "AT42QT1481-AU-ND",
"status": "found"
},
"mouser": {
"pn": "556-AT42QT1481-AU",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "MOSI",
"type": "input",
"description": "SPI data input to the QT1481; leave open if unused."
},
{
"number": "2",
"name": "MISO",
"type": "output",
"description": "SPI data output from the QT1481; leave open if unused."
},
{
"number": "3",
"name": "SCK",
"type": "input",
"description": "SPI clock input; tie to Vdd if unused."
},
{
"number": "4",
"name": "RST",
"type": "input",
"description": "Active-low reset with an internal 30 k to 60 k pull-up resistor; the host should control this pin, and tie to Vdd if unused."
},
{
"number": "5",
"name": "VDD",
"type": "power_in",
"description": "Power supply input; the device operates from +4.75 to 5.25 V."
},
{
"number": "6",
"name": "VSS",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "7",
"name": "XT2",
"type": "output",
"description": "Connection for a 16 MHz ceramic resonator or crystal."
},
{
"number": "8",
"name": "XT1",
"type": "input",
"description": "Connection for a 16 MHz ceramic resonator or crystal."
},
{
"number": "9",
"name": "RX",
"type": "input",
"description": "UART receive data input; tie to Vdd if unused."
},
{
"number": "10",
"name": "TX",
"type": "output",
"description": "UART transmit data output with an internal 20 k to 50 k pull-up resistor; leave open if unused."
},
{
"number": "11",
"name": "WS",
"type": "input",
"description": "Wake-up from sleep input and/or sync input; tie to Vdd if unused."
},
{
"number": "12",
"name": "SMP",
"type": "bidirectional",
"description": "Sample output pin; no unused-pin connection is specified."
},
{
"number": "13",
"name": "Y3A",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "14",
"name": "Y2A",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "15",
"name": "Y1A",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "16",
"name": "Y0A",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "17",
"name": "VDD",
"type": "power_in",
"description": "Power supply input; the device operates from +4.75 to 5.25 V."
},
{
"number": "18",
"name": "VSS",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "19",
"name": "X0",
"type": "output",
"description": "X matrix drive line; leave open if unused."
},
{
"number": "20",
"name": "X1",
"type": "output",
"description": "X matrix drive line; leave open if unused."
},
{
"number": "21",
"name": "X2",
"type": "output",
"description": "X matrix drive line; leave open if unused."
},
{
"number": "22",
"name": "X3",
"type": "output",
"description": "X matrix drive line; leave open if unused."
},
{
"number": "23",
"name": "X4",
"type": "output",
"description": "X matrix drive line; leave open if unused."
},
{
"number": "24",
"name": "X5",
"type": "output",
"description": "X matrix drive line; leave open if unused."
},
{
"number": "25",
"name": "X6",
"type": "output",
"description": "X matrix drive line; leave open if unused."
},
{
"number": "26",
"name": "X7",
"type": "output",
"description": "X matrix drive line; leave open if unused."
},
{
"number": "27",
"name": "VDD",
"type": "power_in",
"description": "Power supply input; the device operates from +4.75 to 5.25 V."
},
{
"number": "28",
"name": "VSS",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "29",
"name": "VDD",
"type": "power_in",
"description": "Power supply input; the device operates from +4.75 to 5.25 V."
},
{
"number": "30",
"name": "Y0B",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "31",
"name": "Y1B",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "32",
"name": "Y2B",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "33",
"name": "Y3B",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "34",
"name": "Y4A",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "35",
"name": "Y4B",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "36",
"name": "Y5A",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "37",
"name": "Y5B",
"type": "bidirectional",
"description": "Y line connection; leave open if unused."
},
{
"number": "38",
"name": "VDD",
"type": "power_in",
"description": "Power supply input; the device operates from +4.75 to 5.25 V."
},
{
"number": "39",
"name": "VSS",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "40",
"name": "STATUS / DBG_DATA",
"type": "output",
"description": "Active-low status output or debug data output, with an internal 20 k to 50 k pull-up resistor; leave open if unused."
},
{
"number": "41",
"name": "DRDY",
"type": "bidirectional",
"description": "Open-drain data ready pin with an internal 20 k to 50 k pull-up resistor; it MUST be used, reads 1 when comms are ready, and needs a 100 µs grace period before checking."
},
{
"number": "42",
"name": "VREF",
"type": "power_in",
"description": "Reference pin that must be connected to Vss."
},
{
"number": "43",
"name": "S_SYNC / DBG_CLK",
"type": "output",
"description": "Scope synchronization output or debug clock output; leave open if unused."
},
{
"number": "44",
"name": "SS",
"type": "input",
"description": "SPI slave select with an internal 20 k to 50 k pull-up resistor; leave open if unused."
}
],
"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": [],
"pages_sent": 15,
"cost_usd": 0.0255,
"at": "2026-10-28T15:47:06"
},
"datasheet": {
"url": "https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-9621-AT42-QT1481_Datasheet.pdf",
"pages": 73,
"sha256": "da52e2df9b963a9f",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 44,
"described": 44,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "at42qt1481-au.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
12,
12,
1.1
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "61ecec1147f835d2c9d165c450b1c8d53e65b038f6ca1dac3066a2dfb1bbbb85",
"checked": "2026-10-28",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "at42qt1481-au-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
12,
12,
1.1
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "8f8c626273d4961474b4098777a399b6bbb32c0e2e2f84df5d2b4b72c00e8501",
"checked": "2026-10-28",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "TQFP-44(10x10)",
"Category": "Sensors",
"Pins": "44"
},
"appearance": {
"housing": {
"quote": "When a finger is sensed, the signal falls since the human body acts to absorb charge from the cross-coupling",
"page": 40,
"doc": "ds.pdf",
"material": "abs"
},
"contacts": {
"quote": "AT42QT1481-AU QS738 44-pin 10 × 10 mm TQFP RoHS compliant IC AT42QT1481-AUR QS738 44-pin 10 × 10 mm TQFP RoHS compliant IC - Tape and reel",
"page": 62,
"doc": "ds.pdf",
"plating": "gold"
},
"version": 1,
"datasheet_sha256": "da52e2df9b963a9f25e62f4958f3fa59f5e4f4b0c5b75f149a90726d4d6ba95a"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"at42qt1481-au"
],
"discovery_pitch": "AT42QT1481-AU (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",
"at42qt1481-au.kicad_sym",
"at42qt1481-au.kicad_mod",
"at42qt1481-au.glb",
"at42qt1481-au.step",
"at42qt1481-au.lbr",
"docs/hero.png",
"docs/at42qt1481-au-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"at42qt1481-au-hero.glb",
"at42qt1481-au-hero.overlay.json",
"at42qt1481-au-etched.glb"
],
"visibility": {
"public": true
}
}