QT60326 Datasheet | QUANTUM

.. l Q z Advanced second generation QMatrix™ controller z Keys individually adjustable for sensitivity, response time, and many other critical parameters z Panel thicknesses to 50mm through any dielectric z 32 and 48 key versions z 100% autocal for life - no in-field adjustments z SPI Slave and UART interfaces z Sleep mode with wake pin z Adjacent key suppression feature z Synchronous noise suppression pin z Spread-spectrum modulation: high noise immunity z Mix and match key sizes & shapes in one panel z Low overhead munications protocol z FMEA pliant design Features z Negligible external ponent count z Extremely low cost per key z 44-pin Pb-free TQFP package QT60326, QT60486 32 & 48 KEY QMATRIX™ ICs S_SYNC /SS DRDY VREF Y5A Y5B Vdd LED Y4A Y4B Vss MOSI MISO SCK /RST Vdd Vss XT2 XT1 RX TX WS 1 2 3 4 5 6 7 8 9 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 Y3B Y2B Y1B Y0B Vdd Vss Vdd X7 X6 X5 X4 QT60326 QT60486 TQFP-44 10 24 11 23 19 13 15 16 18 20 21 14 17 22 12 SMP Y1A Y2A Y3A Y0A Vdd X1 X0 Vss X3 X2 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 48 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 defined as simple 2-part interdigitated electrodes of conductive material, like copper or screened silver or carbon deposited on the rear of a 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 in surface area. The sensitivity of each key can be set individually via simple functions over the SPI or UART port, for example via...