VKD223EB detector equivalent, touch pad detector.
* Operating voltage:2.0-5.5V
* Standby current: 1.5uA/3V
* Operating current: 4.0uA/3V
* Key Response Time：Normal Mode 60mS ，Standby Mode 220mS
* AHLB.
to be implemented with a minimum number of external components.
It has 1 Output pin，the output level, output mode can be.
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