TTP224B-BSBN/TTP224B-BSB TonTouchTM ICs are designed specifically for capacitive sensing

For touchpad control. The device has a built-in touch sensor adjuster. Stable Sensing Method

Diversity conditions can be covered. HMI control panel via non-conductive link

Dielectric material. Mainly used to replace mechanical switches or

button. The ASSP can handle 4 touchpads independently with 4 direct output pins

feature

z Working voltage 2.4V ~ 5.5V

zBuilt-in touch sensor adjuster

z working current, @VDD=3V no load

2.5uA typical in low power mode, 13uA typical in fast mode

z @VDD=3V working voltage:

The response time is about 160mS in low power mode and about 60mS in fast mode

z Sensitivity can be adjusted by external capacitance (1~50pF) of each touchpad

z Fast mode and low power mode selection via pad option (LPMB pin)

Available in direct mode or switched mode, CMOS output or open drain output,

Active high or active low via pad option (TOG/OD/AHLB pins)

z max time limit of 16 seconds/unlimited via pad option (mo0 pin)

z Single-button and multi-button functionality available via pad option (SM pin)

zThere is a stabilization time of about 0.5 seconds after power on, do not touch the keyboard during this time, and

This feature is disabled

z life automatic calibration

z The recalibration cycle is approximately 1 second within 8 seconds after power-on. The key is

Touch within 8 seconds after power-on or if the key is not touched for more than 8 seconds, then

Recalibration period changed to 4 seconds