TTP224B-SQBN Datasheet, PDF (1/9 Pages) Tontek Design Technology – 4 keys Touch Pad Detector IC

TTP224B-SQBN
4 keys Touch Pad Detector IC
Outline
z The TTP224B-SQBN 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 4 touch pads with 4 direct output pins
Characteristic
z Operating voltage 2.4V ~ 5.5V
z Built-in regulator for touch sensor
z Operating current, @VDD=3V no load
At low power mode typical 2.5uA, At fast mode typical 13uA
z @VDD=3V operating voltage :
The response time about 160mS at low power mode, 60mS at fast mode
z Sensitivity can adjust by the capacitance（1~50pF）outside for each touch pad
z Provides Fast mode and Low Power mode selection by pad option (LPMB pin)
z Provides direct mode or toggle mode、CMOS output or open drain output、
active high or active low by pad option (TOG/OD/AHLB pin)
z Have the maximum on time about 16sec/infinite by pad option(MOT0 pin)
z Provides Single-key and Multi-key functions by pad option (SM pin)
z After power-on have about 0.5sec stable-time, during the time do not touch the key pad, and
the function is disabled
z Auto calibration for life
z 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
Applications
z Wide consumer products
z Button key replacement
2015/12/21
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Version：1.0