AT42QT1244_14 Datasheet, PDF (1/61 Pages) ATMEL Corporation – 24-key QMatrix FMEA IEC/EN/UL60730 Touch Sensor

Atmel AT42QT1244
24-key QMatrix FMEA IEC/EN/UL60730 Touch Sensor
PRELIMINARY DATASHEET
Features
 Number of keys:
 Up to 24
 Technology:
 Patented charge-transfer (transverse mode), with frequency hopping
 Key outline sizes:
 6 mm × 6 mm or larger (panel thickness dependent); different sizes and
shapes possible
 Key spacings:
 8 mm or wider, center to center (panel thickness dependent)
 Electrode design:
 Two-part electrode shapes (drive-receive); wide variety of possible layouts
 Layers required:
 One layer (with jumpers), two layers (no jumpers)
 Electrode materials:
 PCB, FPCB, silver or carbon on film, ITO on film
 Panel materials:
 Plastic, glass, composites, painted surfaces (low particle density metallic
paints possible)
 Panel thickness:
 Up to 50 mm glass, 20 mm plastic (key size dependent)
 Key sensitivity:
 Individually settable via simple commands over communication interface
 Interface:
 I²C slave mode (up to 400 kHz data transfer speed)
 Debug output
 Signal processing:
 Self-calibration, auto drift compensation, noise filtering, Adjacent Key
Suppression^® (AKS^®) technology
 FMEA compliant design features
 IEC/EN/UL60730 compliant design features
 UL approval
 VDE compliance
 For use in both class B and class C safety-critical products
 Detects and Reports Key Failure
 Power:
 +3 V to 5 V
 Package:
 32-pin 7 × 7 mm TQFP RoHS compliant
 32-pin 5 × 5 mm QFN RoHS compliant
9631EX–AT42–12/13