AT42QT2160-MMU

The AT42QT2160-MMU (QT2160) is designed for use with up to 16 keys and a slider(constructed from 2 keys up to 8 keys). There are three dedicated General Purpose Input/Outputs (GPIOs) which can be used as inputs for mechanical switches etc. or as driven outputs.There are eight shared General Purpose Outputs (GPOs) (X0...X7) of AT42QT2160-MMU which are driven outputs only. There is PWM control for all GPIO/GPOs.

Features of the AT42QT2160-MMU are:(1)number of keys: up to 16 keys, and one slider (constructed from 2 to 8 keys); (2)number of I/O lines: 11 (3 dedicated - configurable for input or output, 8 shared-output only), PWM control for LED driving; (3)technology: patented spread-spectrum charge-transfer (transverse mode); (4)key outline sizes: 6 mm x 6 mm or larger (panel thickness dependent); widely different sizes and shapes possible; (5)key spacings: 8 mm or wider, center to center (panel thickness dependent); (6)slider design: 2 to 8 keys placed in sequence, same design as keys; (7)electrode design: two-part electrode shapes (drive-receive);wide variety of possible layouts; (8)PCB layers required: one layer (with jumpers), two layers (no jumpers); (9)electrode materials: PCB, FPCB, silver or carbon on film, ITO on film; (10)panel materials: plastic, glass, composites, painted surfaces (low particle density metallic paints possible).

The absolute maximum ratings of the AT42QT2160-MMU can be summarized as:(1)max continuous pin current, any control or drive pin:±10 mA;(2)Vdd:-0.5 to 6V;(3)short circuit duration to ground, any pin:infinite;(4)short circuit duration to Vdd, any pin:infinite;(5)voltage forced onto any pin:-0.6V to (Vdd + 0.6) Volts;(6)storage temp:-55 to +125;(7)operating temp:-40 to +85.Stresses beyond those listed under "Absolute Maximum Specifications" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum specification conditions for extended periods may affect device reliability.A change in burst length should be followed by a calibration command (set the calibration byte to a nonzero value) to ensure reliable operation. AT42QT2160-MMU is also possible to adjust the sensitivity using the negative threshold for that key. Note that thresholds below 6 counts may cause sensitivity to noise and thresholds above 12 counts will require longer burst lengths than strictly necessary.