TTP224 Datasheet | TONTEK

DESCRIPTION FEATURES - - - - - - - - - - - Operating voltage 2.4V~5.5V Built-in regulator with external enable/disable option Operating current, @VDD=3V no load At low power mode typical 2.5u A At fast mode typical 9.0u A @VDD=3V operating voltage : The response time about 100m S at fast mode, 200m S at low power mode for TTP224 The response time about 60m S at fast mode, 160m S at low power mode for TTP224N Sensitivity can adjust by the capacitance(0~50p F) outside for each touch pad Provides Fast mode and Low Power mode selection by pad option(LPMB pin) Provides direct mode or toggle mode、CMOS output or open drain output、 active high or active low by pad option(TOG/OD/AHLB pin). Provides 2 output pins TPQ0D, TPQ2D that have no diode protection, active low Have the maximum on time 120sec/64sec/16sec/infinite by pad option(MOT1, MOT0 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. Wide consumer products Button key replacement APPLICATION - - 2009/8/25 Page 1 of 4 Ver :2.0 Preliminary BLOCK DIAGRAM TP0 TP1 TP2 TP3 DIS13 LPMB MOT0 MOT1 REGEN Sensor oscillator circuit Sensor & Reference detecting circuit TTP224/TTP224N Ton Touch TM TPQ0 TPQ1 TPQ2 TPQ3 TPQ0D TPQ2D Timing counter & function option control circuit Output mode & driver circuit Touch detecting circuit System oscillator circuit Key-on & timing control VREG Regulator circuit TOG AHLB OD SM APPLICATION CIRCUIT TCP224/TCP224N APPLICATION (enable internal regulator) K0 Cs0 K1 Cs1 2 TP1 K2 Cs2 K3 Cs3 3 4 5 TP2 TP3 AHLB 1 TP0 22 TPQ0D 21 TPQ0 20 TPQ1 19 TPQ2D MOT1 10 TPQ2 18 TPQ3 17 SM 16 TCP224/TCP224N OD 15 REGEN 14 DIS13 13 VREG LPMB 104 C1 2009/8/25 Page 2 of 4 MOT0 VSS 12 Ver...