詳細(xì)信息
The TTP222/TTP222E is a touch pad detector IC which offers 8 touch keys. The touching
detection IC is designed for replacing traditional direct button key with fixed pad size. Low
power consumption and wide operating voltage are the contact key features for DC or AC
application.
FEATURES
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.
Auto 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.
APPLICATION
Wide consumer products
Water proofed electric products
Button key replacement