TTP239

2016/3/7

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Version：1.1

8 keys Touch Pad Detector IC

Outline

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

Operating voltage 2.4V ~ 5.5V

Built-in regulator with external enable/disable option (REGEN pin)

Built-in low voltage reset(LVR) function with external enable/disable option (LVREN pin)

Operating current, @VDD=3V no load, LDO enable

At low power mode typical 5.0uA, At fast mode typical 30uA

@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 Fast mode and Low Power mode selection by pad option (LPM pin)

Provides 8 direct outputs for 8 direct input keys. And all can select active high or active low by

pad option (SAHL pin)

Provides two kinds of serial output interface

(SLSERT pin)

Have the maximum on time 120sec/64sec/16sec/infinite by pad option (MOT1, MOT0 pin)

Provides Single-key and Multi-key functions by pad option (SM pin)

2-wires serial interface can select active high or low by pad option (SAHL 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

Applications

Wide consumer products

Button key replacement