TTP239 Datasheet, PDF (1/16 Pages) Tontek Design Technology – 8 keys Touch Pad Detector IC

8 keys Touch Pad Detector IC
TTP239
Outline
z The TTP239 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 8 touch pads with 8 direct output pins.
Characteristic
z Operating voltage 2.4V ~ 5.5V
z Built-in regulator with external enable/disable option (REGEN pin)
z Built-in low voltage reset(LVR) function with external enable/disable option (LVREN pin)
z Operating current, @VDD=3V no load, LDO enable
At low power mode typical 5.0uA, At fast mode typical 30uA
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 (LPM pin)
z Provides 8 direct outputs for 8 direct input keys. And all can select active high or active low by
pad option (SAHL pin)
z Provides two kinds of serial output interface
Include 2-wires and I²C-bus slave serial interface that can be selected by pad option
(SLSERT pin)
z Have the maximum on time 120sec/64sec/16sec/infinite by pad option (MOT1, MOT0 pin)
z Provides Single-key and Multi-key functions by pad option (SM pin)
z 2-wires serial interface can select active high or low by pad option (SAHL 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
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
2016/3/7
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