آی سی لمسی خازنی TTP224

GENERAL DESCRIPTION
The main application is focused at replacing of the mechanical switch or button.
The ASSP can independently handle the 4 touch pads with 4 direct output pins.

FEATURES:
Operating voltage 2.5V~5.5V
Built-in regulator with external enable/disable option
Operating current, @VDD=3V no load
At low power mode typical 2.5uA
At fast mode typical 9.0uA
@VDD=3VThe response time about 100mS
at fast mode
200mS at low power mode
Sensitivity can adjust by the capacitance(0~50pF) outside for each touch pad
Provides Fast mode and Low Power mode selection by pad option(LPMB pin)
Provides direct mode or toggle modeeCMOS output or open drain outpute
active high or active low by pad option(TOG/AHLB/OD pin).
Provides one output pin TPQ0D that has no diode protection, active low
Have the maximum on time 120sec/64sec/16sec/infinite by pad option(MOT1, MOT0 pin)
After power-on have about 0.5sec stable-time, during the time do not touch the key pad,
and the function is disabled
Auto calibration for life, and the re-calibration period is about 4.0sec, when key has not be
touched.