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AT42QT2120-XUR

Public Made by Adom

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Microchip Tech Touch Sensors, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentsensorsat42qt2120-xurfactory-2.0.0extractor-text

Verified AT42QT2120-XUR

by Ray · last 8 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

8 Nov 2026RayPublished by the parts factory: tier lcsc, 20 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: AT42QT2120-XUR · TSSOP-20 · 20 pins
  • ✓copper: 20 copper pads, none touching another net
  • ✓datasheet: all 20 pin names found in the 46-page datasheet
  • ✓distributor: lcsc C2652098, digikey AT42QT2120-XURTR-ND, mouser 556-AT42QT2120-XUR
  • ✓family: TSSOP-20_4.4x6.5mm_P0.65mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-fh848ini/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 20 pins = 20 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 20 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ at42qt2120-xur.kicad_sym✓ at42qt2120-xur.kicad_mod✓ at42qt2120-xur.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray
viewers at42qt2120-xur: viewers · Ray
at42qt2120-xur-etched.glb Publish 0.1.0 · Ray
at42qt2120-xur-etched.step at42qt2120-xur: factory component page (tier=lcsc) · Ray
at42qt2120-xur-hero.glb at42qt2120-xur: hero GLB from the etched model (keeps the MPN mark) · Ray
at42qt2120-xur-hero.overlay.json Publish 0.1.0 · Ray
at42qt2120-xur.glb Publish 0.1.0 · Ray
at42qt2120-xur.kicad_mod Publish 0.1.0 · Ray
at42qt2120-xur.kicad_sym Publish 0.1.0 · Ray
at42qt2120-xur.lbr Publish 0.1.0 · Ray
at42qt2120-xur.step Publish 0.1.0 · Ray
package.json Publish 0.1.1 · Ray
page.json Publish 0.1.1 · Ray
README.md Publish 0.1.0 · Ray
verification.json Verified: Published by the parts factory: tier lcsc, 20 pins · Ray

AT42QT2120-XUR

Microchip Tech · Touch Sensors · TSSOP-20

AT42QT2120-XUR from Microchip Tech, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 KEY8/GPO6 bidirectional Comms mode: Key 8 / general-purpose output (standalone mode: OUT3, push-pull output for key 3); leave open if unused.
2 KEY7/GPO5 bidirectional Comms mode: Key 7 / general-purpose output (standalone mode: OUT2, push-pull output for key 2); leave open if unused.
3 KEY6/GPO4 bidirectional Comms mode: Key 6 / general-purpose output (standalone mode: Key 6); leave open if unused.
4 KEY5/GPO3 bidirectional Comms mode: Key 5 / general-purpose output (standalone mode: Key 5); leave open if unused.
5 KEY4/GPO2 bidirectional Comms mode: Key 4 / general-purpose output (standalone mode: Key 4); leave open if unused.
6 KEY3/GPO1 bidirectional Comms mode: Key 3 / general-purpose output (standalone mode: Key 3); leave open if unused.
7 KEY2/GPO0 bidirectional Comms mode: Key/slider/wheel 2 / general-purpose output (standalone mode: Key 2); leave open if unused.
8 KEY1 bidirectional Comms mode: Key/slider/wheel 1 (standalone mode: GUARD channel); leave open if unused.
9 KEY0 bidirectional Comms mode: Key/slider/wheel 0 (standalone mode: PROX proximity channel); leave open if unused.
10 VSS power_in Ground.
11 VDD power_in Power supply, 1.8 V to 5.5 V.
12 MODE input Mode selection pin: connect to Vss for Comms mode, connect to Vdd for Standalone mode.
13 SDA bidirectional Comms mode: open-drain I2C serial interface data, pull up to Vdd (unused in standalone mode).
14 RESET input Active-low reset with internal 60 kΩ pull-up; tie to Vdd if unused.
15 N/C unconnected Comms mode: no connection (standalone mode: PXOUT, open-drain output for the proximity channel); leave open.
16 SCL bidirectional Comms mode: open-drain I2C serial interface clock, pull up to Vdd (unused in standalone mode).
17 CHANGE output Comms mode: active-low open-drain state change interrupt requiring an external pull-up resistor (unused in standalone mode).
18 KEY11/GPO9 bidirectional Comms mode: Key 11 / general-purpose output (standalone mode: OUT6, push-pull output for key 6); leave open if unused.
19 KEY10/GPO8 bidirectional Comms mode: Key 10 / general-purpose output (standalone mode: OUT5, push-pull output for key 5); leave open if unused.
20 KEY9/GPO7 bidirectional Comms mode: Key 9 / general-purpose output (standalone mode: OUT4, push-pull output for key 4); leave open if unused.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TSSOP-20
Category Sensors
Pins 20

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage Vdd Vdd -0.5 6 V 30
Max continuous pin current, any control or drive pin -10 10 mA 30
Storage temperature -55 125 °C 30
Operating temperature -40 85 °C 30
Supply voltage Vdd Vdd 1.8 5.5 V 30
Supply ripple+noise -25 25 mV 30
Cx load capacitance per key Cx 1 30 pF per key 30
Low output voltage Vol 0.6 V 30
Input leakage current Iil -1 1 µA 30
Sample frequency FQT 10.5 12.5 kHz Modulated spread-spectrum (chirp) 31
I2C-compatible clock rate FI2C 400 kHz 31
Burst modulation, percentage Fm 15 % 31
RESET pulse width 2 µs 2 µs at 1.8 V 31

CAD (KiCad official)

  • Symbol: AT42QT2120-XUR
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: at42qt2120-xur-etched.step / at42qt2120-xur-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); at42qt2120-xur.step / at42qt2120-xur.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (46 pp, sha256 2ae816b6e110f11c, retrieved 2026-11-08, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF