Operating voltage 2.0V~5.5V
Operating current typical 80uA, max 160uA at VDD=3V
The output refresh rate about 55Hz at VDD=3V
64 steps sensitivity selectable (SLSE0~5 pin option) Another have offer 2 kinds of base-step (OPST pin option)
Stable touching detection of human body for replacing traditional direct switch key
Provides direct mode、 matrix mode and serial mode selected by pad option
Maximum 8 input pads and 8 outputs for direct mode; Maximum 8 input pads for serial interface mode; Maximum 8 input pads provide fixed 2*4 and 3*3 matrix types
Outputs can be selected active high or active low by pad option
After power-on have a stable-time, during the time do not touch the key-pad.
And the function is disabled. The stable-time for TTP222 is 3.5~4.0sec, and
for TTP222E is 0.8~1.0sec.
ƒAuto calibration for life. And the re-calibration period for TTP222 is 3.5~4.0sec,
and for TTP222E is 0.8~1.0sec. When all keys do not touched.