TTP223B Capacitive Touch Sensor Module

TTP223B Digital Touch Sensor Switch Module
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 TTP223B Capacitive Touch Sensor Module Specification


  • Operating voltage 2.0V~5.5V 
  • Operating current @VDD=3V, no load, SLRFTB=1
  • 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 a 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 keypad and the function is disabled 
  • Auto calibration for life
  • Re-calibration period is about 4 sec~12 sec when the key has not been touched

This is jog type capacitive touch switch sensor module based on a touch detection IC TTP223B. Normally, the output is low level (at the mode of low power consumption). When the finger touches the corresponding location, the output will be high (at quick speed mode). When the module does not be touched for 12 seconds, the mode would switch to low-power mode. It can be installed in the module, such as plastic, glass, non-metallic material surface. But not cover thin sheets(metal) on the surface of the module. Just touch the correct position, it can be hidden in walls, desktops, and other parts to be buttons. Allows you to remove the troubles of conventional push-type buttons.

Applications:

  • Waterproofed electric products
  • Button key replacement
  • Consumer products

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