QT60320C Datasheet | QUANTUM

.. NOT REMENDED FOR NEW DESIGNS 32-KEY QMATRIX™ CHARGE-TRANSFER IC Gnd I4 AIN Vcc X4 X5 X2 X3 X1 I2 I3 Creates 32 ‘touch buttons’ through any dielectric 100% autocal for life - no adjustments required 'N' key rollover: senses all 32 keys in parallel Keys individually adjustable for sensitivity Mix 'n match key sizes & shapes in one panel Tolerates a 20:1 variance in key sizes on a panel Panel thicknesses to 5 cm or more Back lit keys possible with ITO electrodes LED status function drives User-addressable multifunction drive pins User-addressable internal eeprom Simple, universal serial interface 5V single supply operation 44-pin TQFP package One square inch (6.5 square cm) of PCB required X6 X7 X8 RST Vcc Gnd XT2 XT1 RX TX O1 1 2 3 4 5 6 7 8 9 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 I1 CC1 CC2 CS Aref AGnd Vcc O8 O7 O6 O5 QT60320 29 28 27 26 25 10 24 11 23 12 13 14 15 16 17 18 19 20 21 22 L1 O4 O3 O2 L2 Vcc Y2 Y1 Gnd Y4 Y3 APPLICATIONS Security keypanels Industrial keyboards Appliance controls Outdoor keypads ATM machines Touch-screens Automotive panels Machine tools The QT60320 digital charge-transfer (“QT”) QMatrix™ IC is designed to detect touch on up to 32 keys in a scanned X-Y matrix. It will project the keys through almost any dielectric, like glass, plastic, stone, ceramic, and even most kinds of wood, up to thicknesses of 5 cm or more. The touch areas are defined as simple 2-part interdigitated electrodes of conductive material, like copper, Indium-Tin-Oxide (ITO), or screened silver or carbon deposited on the rear of the control panel. Key sizes, shapes and placement are almost entirely arbitrary; sizes and shapes of keys can be mixed within a single panel of keys and can vary by a factor of 20:1 or more in area. The gain (sensitivity) and threshold of each key can be set individually via simple mands over the UART port, for example via the freeware Qm Btn program. Key setups are stored internally in an...