Atmel AT42QT2640 64-key 8-slider/wheel QMatrix FMEA IEC/EN/UL60730 Touch Sensor IC PRELIMINARY DATASHEET Features Number of channels: Up to 64 keys Up to eight sliders/wheels, each with 8-bit resolution Technology: Patented charge-transfer (transverse mode), with frequency hopping Key outline sizes: 5 mm 5 mm or larger (panel thickness dependent) widely different sizes and shapes possible Key spacings: 6 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) Adjacent Metal: Compatible with grounded metal immediately next to keys Panel thickness: Up to 50 mm glass, 20 mm plastic (key size dependent) Key sensitivity: Individually settable over serial interface Interfaces: SPI slave (4 MHz max. clock) CHANGE status indication pin Debug output Signal processing: Self-calibration, auto drift compensation, noise filtering, Adjacent Key Suppression (AKS ) FMEA compliant design features 9684DXAT4212/13 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: 4.75 V to 5.25 V Package: 44-pin 10 10 mm TQFP RoHS compliant AT42QT2640 PRELIMINARY DATASHEET 2 9684DXAT4212/13