QT240

www.DataSheet4U.com lQ z Four independent charge-transfer (‘QT’) touch keys z Individual outputs per channel - active high z Projects prox fields through any dielectric z Sensitivity easily adjusted on a per-channel basis z 100% autocal for life - no adjustments required z 3.9V ~ 5.5V single supply operation z 10s, 60s, infinite auto-recal timeout (strap options) z Sync pin for line sync to suppress noise z Spread spectrum operation z Pin options for auto recalibration timings z Extremely low cost per key z 20-SSOP Pb-free package SNS2 SNS2K SNS1 SNS1K OUT1 OUT2 OUT3 VSS SS/SYNC n.c. 1 2 3 4 QT240 5 6 7 8 9 10 20-SSOP 20 19 18 17 16 15 14 13 12 11 QT240 4 KEY QTOUCH™ SENSOR IC SNS3K SNS3 SNS4K SNS4 n.c. OSC VDD /RES OUT4 n.c. APPLICATIONS Š PC Peripherals Š Backlighted buttons Š Appliance controls Š Security systems Š Access systems Š Pointing devices Š Instrument panels Š Gaming machines The QT240 charge-transfer (“QT’”) QTouch IC is a self-contained digital sensor IC capable of detecting near-proximity or touch on 4 electrodes. It allows electrodes to project independent sense fields through any dielectric like glass, plastic, stone, ceramic, and wood. It can also turn metal-bearing objects into intrinsic sensors, making them responsive to proximity or touch. This capability coupled with its continuous self-calibration feature can lead to entirely new product concepts , adding high value to product designs. Each of the channels operate s independently of the others, and...