Input Voltage : 2 Volt - 5.5 Volts DC.
Sensitivity can adjust by the capacitance(0~50pF).
Have an external power-on reset pin(RST pin).
After power-on have about 0.5sec stable-time, during the time do not touch the keypad, and the function is disabled.
The re-calibration period is about 4.0 sec when the key has not to be touched.
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