OVERVIEW
QT140/150 devices are burst mode digital charge-transfer (QT) sensor ICs designed specifically for touch controls; they include all hardware and signal processing functions necessary to provide stable sensing under a wide variety of conditions. Only a single low cost capacitor per channel is required for operation.

● Completely independent QT touch circuits
● Individual logic outputs per channel (open drain)
● Projects prox fields through any dielectric
● Only one external capacitor required per channel
● Sensitivity easily adjusted on a per-channel basis
● 100% autocal for life - no adjustments required
● 3~5.5V, 5mA single supply operation
● Toggle mode for on/off control (strap option)
● 10s, 60s, infinite auto-recal timeout (strap options)
● AKS™ Adjacent Key Suppression (pin option)
● Sync pin for multi-chip sync or line sync
● Less expensive per key than many mechanical switches
● Eval board with backlighting - p/n E160

APPLICATIONS
♦ Instrument panels
♦ Gaming machines
♦ Access systems
♦ Pointing devices
♦ Appliance controls
♦ Security systems
♦ PC Peripherals
♦ Backlighted buttons