QT  -  Series DataSheet
AT42QT2160  -  QSlide?, 16-key QMatrix? Sensor IC  -  Atmel  -  Touch Technology

Features
• Number of keys: up to 16 keys, and one slider (constructed from 2 to 8 keys)
• Number of I/O lines: 11 (3 dedicated - configurable for input or output, 8 shared - output only), PWM control for LED driving
• Technology: patented spread-spectrum charge-transfer (transverse mode)
• Key outline sizes: 6 mm x 6 mm or larger (panel thickness dependent); widely different sizes and shapes possible
• Key spacings: 8 mm or wider, center to center (panel thickness dependent)
• Slider design: 2 to 8 keys placed in sequence, same design as keys
• Electrode design: two-part electrode shapes (drive-receive); wide variety of possible layouts
• PCB 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 3 mm glass, 2.5 mm plastic (key size dependent)
• Key sensitivity: individually settable via simple commands over I2C-compatible interface
• Interface: I2C-compatible slave mode (100kHz)
• Moisture tolerance: best in class
• Power: 1.8 V to 5.5 V
• Package: 28-pin 4 x 4 mm MLF RoHS compliant
• Signal processing: self-calibration, auto drift compensation, noise filtering, Adjacent Key SuppressionTM technology
• Applications: laptop, mobile, consumer appliances, PC peripheral etc.
• Patents: AKS™ (patented Adjacent Key Suppression™) technology QMatrix™ (patented charge-transfer method) QSlide™ (patented charge-transfer method) (patent-pending QSlide sensing configuration)
• This datasheet is applicable to revision 4R0 chips only