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AT42QT1481-AUR

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Microchip Tech Touch Sensors, TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentsensorsat42qt1481-aurfactory-2.0.0extractor-text

Verified AT42QT1481-AUR

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier mfr, 44 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: AT42QT1481-AUR · TQFP-44(10x10) · 44 pins
  • ✓copper: 44 copper pads, none touching another net
  • ✓datasheet: all 44 pin names found in the 73-page datasheet
  • ✓distributor: lcsc C2652062, digikey AT42QT1481-AURTR-ND, mouser 556-AT42QT1481-AUR
  • ✓family: TQFP-44_10x10mm_P0.8mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-6z4e9ois/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: 44 pins = 44 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 44 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ at42qt1481-aur.kicad_sym✓ at42qt1481-aur.kicad_mod✓ at42qt1481-aur.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 5d ago
viewers at42qt1481-aur: viewers · Ray 5d ago
at42qt1481-aur-etched.glb Publish 0.1.0 · Ray 5d ago
at42qt1481-aur-etched.step at42qt1481-aur: factory component page (tier=mfr) · Ray 5d ago
at42qt1481-aur-hero.glb at42qt1481-aur: hero GLB from the etched model (keeps the MPN mark) · Ray 5d ago
at42qt1481-aur-hero.overlay.json Publish 0.1.0 · Ray 5d ago
at42qt1481-aur.glb Publish 0.1.0 · Ray 5d ago
at42qt1481-aur.kicad_mod Publish 0.1.0 · Ray 5d ago
at42qt1481-aur.kicad_sym Publish 0.1.0 · Ray 5d ago
at42qt1481-aur.lbr Publish 0.1.0 · Ray 5d ago
at42qt1481-aur.step Publish 0.1.0 · Ray 5d ago
package.json Publish 0.1.0 · Ray 5d ago
page.json Set visibility: public · Ray 5d ago
README.md Publish 0.1.0 · Ray 5d ago
verification.json Verified: Published by the parts factory: tier mfr, 44 pins · Ray 5d ago

AT42QT1481-AUR

Microchip Tech · Touch Sensors · TQFP-44(10x10)

AT42QT1481-AUR from Microchip Tech, in a TQFP-44(10x10). 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 MOSI input SPI data input; leave open if unused.
2 MISO output SPI data output; leave open if unused.
3 SCK input SPI clock input; tie to Vdd if unused.
4 RST input Reset, active low, with internal 30 k - 60 k pull-up resistor; should be controlled by the host; tie to Vdd if unused.
5 VDD power_in Power supply pin.
6 VSS power_in Ground pin.
7 XT2 output Connection for ceramic resonator or crystal, 16 MHz.
8 XT1 input Connection for ceramic resonator or crystal, 16 MHz.
9 RX input UART receive data input; tie to Vdd if unused.
10 TX output UART transmit data output with internal 20 k - 50 k pull-up resistor; leave open if unused.
11 WS input Wake-up from sleep input and/or sync input; tie to Vdd if unused.
12 SMP bidirectional Sample output pin.
13 Y3A bidirectional Y line connection; leave open if unused.
14 Y2A bidirectional Y line connection; leave open if unused.
15 Y1A bidirectional Y line connection; leave open if unused.
16 Y0A bidirectional Y line connection; leave open if unused.
17 VDD power_in Power supply pin.
18 VSS power_in Ground pin.
19 X0 output X matrix drive line; leave open if unused.
20 X1 output X matrix drive line; leave open if unused.
21 X2 output X matrix drive line; leave open if unused.
22 X3 output X matrix drive line; leave open if unused.
23 X4 output X matrix drive line; leave open if unused.
24 X5 output X matrix drive line; leave open if unused.
25 X6 output X matrix drive line; leave open if unused.
26 X7 output X matrix drive line; leave open if unused.
27 VDD power_in Power supply pin.
28 VSS power_in Ground pin.
29 VDD power_in Power supply pin.
30 Y0B bidirectional Y line connection; leave open if unused.
31 Y1B bidirectional Y line connection; leave open if unused.
32 Y2B bidirectional Y line connection; leave open if unused.
33 Y3B bidirectional Y line connection; leave open if unused.
34 Y4A bidirectional Y line connection; leave open if unused.
35 Y4B bidirectional Y line connection; leave open if unused.
36 Y5A bidirectional Y line connection; leave open if unused.
37 Y5B bidirectional Y line connection; leave open if unused.
38 VDD power_in Power supply pin.
39 VSS power_in Ground pin.
40 STATUS / DBG_DATA output Status output (active low) or Debug Data, with internal 20 k - 50 k pull-up resistor; leave open if unused.
41 DRDY bidirectional Open-drain comms-ready I/O with internal 20 k - 50 k pull-up; 1 = comms ready after a 100 µs grace period; this pin MUST be used.
42 VREF power_in Connect to Vss.
43 S_SYNC / DBG_CLK output Scope synchronization output or Debug Clock; leave open if unused.
44 SS input SPI slave select with internal 20 k - 50 k pull-up resistor; leave open if unused.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-44(10x10)
Category Sensors
Pins 44

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Vdd supply voltage (recommended operating range) Vdd 4.75 5.25 V 58
Operating temperature -40 105 °C 58
Storage temperature -55 125 °C 58
Supply ripple + noise 20 mV p-p 58
Cx transverse load capacitance per key Cx 0 20 pF 58
Oscillator frequency tolerance (Fosc nominal 16 MHz) Fosc -2 2 % 58
Vdd absolute maximum supply voltage Vdd 6 V 58
Max continuous pin current, any control or drive pin -10 10 mA 58
Frequency of operation 17 MHz 58
EEPROM setups maximum writes 100000 write cycles 58
Low output voltage Vol 0.6 V 4mA sink 59
High output voltage Voh 4.2 V 1 mA source 59
Input leakage current Iil -1 1 µA 59
Acquisition resolution Ar 9 11 bits 59
Internal pull-up resistors (DRDY, SS, TX, STATUS pins) Rp 20 50 k DRDY, SS, TX, STATUS pins 59
Internal RST pull-up resistor Rrst 30 60 k 59
SS to first CLK edge S1 125 ns SPI parameter controlled by host 59
CLK to valid MISO S2 20 ns SPI parameter controlled by QT1481 59
Last CLK to SS S3 25 ns SPI parameter controlled by host 59
SS to 3-state MISO S4 20 ns SPI parameter controlled by QT1481 59
SS to falling DRDY S5 20 µs SPI parameter controlled by QT1481 59
DRDY low pulse width S6 1 µs SPI parameter controlled by QT1481 59
CLK low pulse width S7 125 ns SPI parameter controlled by host 59
CLK high pulse width S8 125 ns SPI parameter controlled by host 59
CLK period S9 250 ns SPI parameter controlled by host 59
SPI clock rate Fck 4 MHz SPI parameter controlled by host 59
Supply current, running Iddr 13 mA 59
Supply current, sleeping Idds 15 µA 59
Vdd internal reset voltage Vr 4 V 59

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing abs When a finger is sensed, the signal falls since the human body acts to absorb charge from the cross-coupling 40
contacts gold 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 62

CAD (KiCad official)

  • Symbol: AT42QT1481-AUR
  • Footprint: Package_QFP:TQFP-44_10x10mm_P0.8mm
  • 3D model: TQFP-44(10x10) (KiCad packages3D, STEP)
  • 3D model files: at42qt1481-aur-etched.step / at42qt1481-aur-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); at42qt1481-aur.step / at42qt1481-aur.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (73 pp, sha256 c079e60007fe4fb7, retrieved 2026-10-30, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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