component
AT42QT2120-XUR
Public Made by Adomby adom
Microchip Tech Touch Sensors, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
Ray
Publish 0.1.1
bc88467
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"title": "AT42QT2120-XUR",
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{
"number": "1",
"name": "KEY8/GPO6",
"type": "bidirectional",
"description": "Comms mode: Key 8 / general-purpose output (standalone mode: OUT3, push-pull output for key 3); leave open if unused."
},
{
"number": "2",
"name": "KEY7/GPO5",
"type": "bidirectional",
"description": "Comms mode: Key 7 / general-purpose output (standalone mode: OUT2, push-pull output for key 2); leave open if unused."
},
{
"number": "3",
"name": "KEY6/GPO4",
"type": "bidirectional",
"description": "Comms mode: Key 6 / general-purpose output (standalone mode: Key 6); leave open if unused."
},
{
"number": "4",
"name": "KEY5/GPO3",
"type": "bidirectional",
"description": "Comms mode: Key 5 / general-purpose output (standalone mode: Key 5); leave open if unused."
},
{
"number": "5",
"name": "KEY4/GPO2",
"type": "bidirectional",
"description": "Comms mode: Key 4 / general-purpose output (standalone mode: Key 4); leave open if unused."
},
{
"number": "6",
"name": "KEY3/GPO1",
"type": "bidirectional",
"description": "Comms mode: Key 3 / general-purpose output (standalone mode: Key 3); leave open if unused."
},
{
"number": "7",
"name": "KEY2/GPO0",
"type": "bidirectional",
"description": "Comms mode: Key/slider/wheel 2 / general-purpose output (standalone mode: Key 2); leave open if unused."
},
{
"number": "8",
"name": "KEY1",
"type": "bidirectional",
"description": "Comms mode: Key/slider/wheel 1 (standalone mode: GUARD channel); leave open if unused."
},
{
"number": "9",
"name": "KEY0",
"type": "bidirectional",
"description": "Comms mode: Key/slider/wheel 0 (standalone mode: PROX proximity channel); leave open if unused."
},
{
"number": "10",
"name": "VSS",
"type": "power_in",
"description": "Ground."
},
{
"number": "11",
"name": "VDD",
"type": "power_in",
"description": "Power supply, 1.8 V to 5.5 V."
},
{
"number": "12",
"name": "MODE",
"type": "input",
"description": "Mode selection pin: connect to Vss for Comms mode, connect to Vdd for Standalone mode."
},
{
"number": "13",
"name": "SDA",
"type": "bidirectional",
"description": "Comms mode: open-drain I2C serial interface data, pull up to Vdd (unused in standalone mode)."
},
{
"number": "14",
"name": "RESET",
"type": "input",
"description": "Active-low reset with internal 60 kΩ pull-up; tie to Vdd if unused."
},
{
"number": "15",
"name": "N/C",
"type": "unconnected",
"description": "Comms mode: no connection (standalone mode: PXOUT, open-drain output for the proximity channel); leave open."
},
{
"number": "16",
"name": "SCL",
"type": "bidirectional",
"description": "Comms mode: open-drain I2C serial interface clock, pull up to Vdd (unused in standalone mode)."
},
{
"number": "17",
"name": "CHANGE",
"type": "output",
"description": "Comms mode: active-low open-drain state change interrupt requiring an external pull-up resistor (unused in standalone mode)."
},
{
"number": "18",
"name": "KEY11/GPO9",
"type": "bidirectional",
"description": "Comms mode: Key 11 / general-purpose output (standalone mode: OUT6, push-pull output for key 6); leave open if unused."
},
{
"number": "19",
"name": "KEY10/GPO8",
"type": "bidirectional",
"description": "Comms mode: Key 10 / general-purpose output (standalone mode: OUT5, push-pull output for key 5); leave open if unused."
},
{
"number": "20",
"name": "KEY9/GPO7",
"type": "bidirectional",
"description": "Comms mode: Key 9 / general-purpose output (standalone mode: OUT4, push-pull output for key 4); leave open if unused."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
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"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
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],
"pages_sent": 13,
"cost_usd": 0.0732,
"at": "2026-11-08T01:02:15"
},
"datasheet": {
"url": "https://ww1.microchip.com/downloads/en/DeviceDoc/doc9634.pdf",
"pages": 46,
"sha256": "2ae816b6e110f11c",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 20,
"described": 20,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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"zmin_mm": 0,
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"footprint_binding": "identity",
"sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
"checked": "2026-11-08",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
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"metadata": {
"specs": {
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"Package": "TSSOP-20",
"Category": "Sensors",
"Pins": "20"
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"characteristics": {
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"rows": [
{
"name": "Supply voltage Vdd",
"symbol": "Vdd",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 30,
"source": "datasheet"
},
{
"name": "Max continuous pin current, any control or drive pin",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": -10,
"typ": null,
"max": 10,
"conditions": "",
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{
"name": "Storage temperature",
"symbol": "",
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"unit": "°C",
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"typ": null,
"max": 125,
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{
"name": "Operating temperature",
"symbol": "",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "",
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{
"name": "Supply voltage Vdd",
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"unit": "V",
"min": 1.8,
"typ": null,
"max": 5.5,
"conditions": "",
"source_page": 30,
"source": "datasheet"
},
{
"name": "Supply ripple+noise",
"symbol": "",
"kind": "recommended_operating",
"unit": "mV",
"min": -25,
"typ": null,
"max": 25,
"conditions": "",
"source_page": 30,
"source": "datasheet"
},
{
"name": "Cx load capacitance per key",
"symbol": "Cx",
"kind": "recommended_operating",
"unit": "pF",
"min": 1,
"typ": null,
"max": 30,
"conditions": "per key",
"source_page": 30,
"source": "datasheet"
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{
"name": "Low output voltage",
"symbol": "Vol",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.6,
"conditions": "",
"source_page": 30,
"source": "datasheet"
},
{
"name": "Input leakage current",
"symbol": "Iil",
"kind": "electrical",
"unit": "µA",
"min": -1,
"typ": null,
"max": 1,
"conditions": "",
"source_page": 30,
"source": "datasheet"
},
{
"name": "Sample frequency",
"symbol": "FQT",
"kind": "timing",
"unit": "kHz",
"min": 10.5,
"typ": 12.5,
"max": null,
"conditions": "Modulated spread-spectrum (chirp)",
"source_page": 31,
"source": "datasheet"
},
{
"name": "I2C-compatible clock rate",
"symbol": "FI2C",
"kind": "timing",
"unit": "kHz",
"min": null,
"typ": null,
"max": 400,
"conditions": "",
"source_page": 31,
"source": "datasheet"
},
{
"name": "Burst modulation, percentage",
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"unit": "%",
"min": 15,
"typ": null,
"max": null,
"conditions": "",
"source_page": 31,
"source": "datasheet"
},
{
"name": "RESET pulse width",
"symbol": "",
"kind": "timing",
"unit": "µs",
"min": 2,
"typ": null,
"max": null,
"conditions": "2 µs at 1.8 V",
"source_page": 31,
"source": "datasheet"
}
]
}
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"description": "Microchip Tech Touch Sensors, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"org": "adom"
}