(QT60168 / QT60248) 16 AND 24 KEY QMATRIX TOUCH SENSOR ICs
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lQ
QProx™ QT60168, QT60248
16, 24 KEY QMATRIX™ ICs
/RST X0 Y2A Y2B Y0A Y1A
z Second generation ch...
Description
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QProx™ QT60168, QT60248
16, 24 KEY QMATRIX™ ICs
/RST X0 Y2A Y2B Y0A Y1A
z Second generation charge-transfer QMatrix technology z Keys individually adjustable for sensitivity, response time, and many other critical parameters z Panel thicknesses to 50mm through any dielectric z 16 and 24 touch key versions z 100% autocal for life - no adjustments required z SPI slave interface z Adjacent key suppression feature z Synchronous noise suppression feature z Spread-spectrum modulation - high noise immunity z Mix and match key sizes & shapes in one panel z Low overhead communications protocol z FMEA compliant design features z Negligible external component count z Extremely low cost per key z +3 to +5V single supply operation z 32-pin lead-free TQFP package
X3 X4 VSS VDD VSS VDD X5 X6
1 2 3 4 5 6 7 8
32 31 30 29 28 27 26 25 24 23
X1 X2 VREF X7
Y1B Y0B n/c VSS VDD SYNC VDD SCK
QT60248 QT60168 TQFP-32
22 21 20 19 18
17 9 10 11 12 13 14 15 16 SMP S_SYNC /SS MISO MOSI DRDY
APPLICATIONS
y Security keypanels y Industrial keyboards y Appliance controls y Outdoor keypads y ATM machines y Touch-screens y Automotive panels y Machine tools
These digital charge-transfer (“QT”) QMatrix™ ICs are designed to detect human touch on up to 16 or 24 keys when used with a scanned, passive X-Y matrix. They will project touch keys through almost any dielectric, e.g. glass, plastic, stone, ceramic, and even wood, up to thicknesses of 5 cm or more. The touch areas are defi...
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