Outline
◆  The TTP224B-RO8N TonTouch TM IC is capacitive sensing design specifically for touch pad
controls. The device built in regulator for touch sensor. Stable sensing method can cover
diversity conditions. Human interfaces control panel links through non-conductive dielectric
material. The main application is focused at replacing of the mechanical switch or button. The
ASSP can independently handle the 2 touch pads with 2 direct output pins
Characteristic
◆  Operating voltage 2.4V ~ 5.5V
◆  Built-in regulator
◆  Operating current, @VDD=3V no load
At low power mode typical 2.5uA, At fast mode typical 13uA
◆  @VDD=3V operating voltage :
The response time about 160mS at low power mode, 60mS at fast mode
◆  Sensitivity can adjust by the capacitance（1~50pF）outside for each touch pad
◆  Provides direct mode or toggle mode active high or active low by pad option (TOG/AHLB 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
◆  The re-calibration period is about 1 sec within 8 sec after power-on. When key has been
touched within 8 sec or key has not been touched more than 8 sec after power-on, then the
re-calibration period change to 4 sec

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