TTP224N-CO8 Datasheet, PDF (1/8 Pages) Tontek Design Technology – 2 KEY TOUCH PAD DETECTOR IC

Preliminary
TTP224N-CO8
TonTouch^TM
2 KEY TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP224N-CO8 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.
FEATURES
 Operating voltage 2.4V~5.5V
 Built-in regulator
 Operating current, @VDD=3V no load
At low power mode typical 2uA, At fast mode typical 6.5uA
 @VDD=3V operating voltage :
The response time about 60mS at fast mode,160mS at low power mode
 Sensitivity can adjust by the capacitance(0~50pF) 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, and the re-calibration period is about 4.0sec, when key has not be
touched.
APPLICATION
 Wide consumer products
 Button key replacement
2014/06/05
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