Capacitive Touch 1 Pad Sensor TTP223

The TTP223 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.

Specifications :

• ƒOperating voltage 2.0V~5.5V
• Operating current @VDD=3V, no load
• At low power mode typical 1.5uA, maximum 3.0uA
• The response time max 220mS at low power mode @VDD=3V
• Sensitivity can adjust by the capacitance(0~50pF) outside
• Stable touching detection of human body for replacing traditional direct switch key
• Provides Low Power mode
• Provides direct mode, toggle mode by pad option(TOG pin)
• Q pin is CMOS output
• All output modes can be selected active high or active low by pad option(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
• At low power mode the re-calibration period is about 4.0sec normally,
• When key detected touch and released touch, the auto re-calibration will be redoing after about 16sec from releasing key

Applications :

• Wide consumer products
• Button key replacement