1 KEY TOUCH PAD DETECTOR IC TonTouchTM

Product：TTP223/TTP223N

一、General Description 

The TTP223/TTP223N TonTouchTM is a touch pad detector IC which offers 1 touch key. The

touching detection IC is designed for replacing traditional direct button key with diverse pad size. Low power consumption and wide operating voltage are the contact key features for DC or AC application.

二、 Features                                       

Operating voltage 2.0V~5.5V

Operating current @VDD=3V, no load, SLRFTB=1

At low power mode typical 1.5uA, maximum 3.0uA

At fast mode typical 3.5uA, maximum 7.0uA

@VDD=3V, no load, SLRFTB=0

At low power mode typical 2.0uA, maximum 4.0uA

At fast mode typical 6.5uA, maximum 13.0uA

The response time max about 60mS at fast mode, 220mS at low power mode @VDD=3V

Sensitivity can adjust by the capacitance(0~50pF) outside

Have two kinds of sampling length by pad option(SLRFTB pin)

Stable touching detection of human body for replacing traditional direct switch key

Provides Fast mode and Low Power mode selection by pad option(LPMB pin)

Provides direct mode、toggle mode by pad option(TOG pin)

Open drain mode by bonding option, OPDO pin is open drain output, Q pin is CMOS output

All output modes can be selected active high or active low by pad option(AHLB pin)

Have the maximum on time 100sec by pad option(MOTB pin)

Have external power on reset pin(RST 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 at fast mode.

At low power mode the re-calibration period is the same 4.0sec normally,

When key detected touch and released touch, the auto re-calibration will be redoing after

about 16sec from releasing key

The sensitivity of TTP223N is better than TTP223’s.

 But the stability of TTP223N is worse than TTP223’s.

三、Applications

Wide consumer products

Button key replacement

四、PAD DESCRIPTION 

Pin Type

 I CMOS input only

 O CMOS push-pull output

 I/O CMOS I/O

 OD CMOS open drain output

 I-PH CMOS input and pull-high resister

 I-PL CMOS input and pull-low resister

 P Power / Ground

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