TTP223 SOT 23-6 One-touch Key Detecting IC

The TTP223 is a touch pad detector IC which offers one touch key, designed for replacing traditional direct key button switch with diverse pad size. Low power consumption and wide operating voltage are the contact key features for dc or ac application .The circuit can be interfaced to any microcontroller through the 3-pin header J1. Recommended VCC is regulated 5V, and the available output (OUT) is active-high (H) in case of a finger touch at the touch pad (TP). LED 1 (green) is the power (PWR) indicator, and LED 2 (red) is an optional output status (OUT) indicator. Just bridge the solder jumper JP1 to enable the output status indicator, if necessary.

FEATURES:

2. OPERATING VOLTAGE 2.0V~5.5V

3. OPERATING CURRENT @VDD=3V, NO LOAD AT LOW POWER MODE TYPICAL 1.5UA,  MAXIMUM  3.0UA

4. THE RESPONSE TIME MAX 220MS AT LOW POWER MODE @VDD=3V

5. SENSITIVITY CAN ADJUST BY THE CAPACITANCE(0~50PF) OUTSIDE

6. STABLE TOUCHING DETECTION OF HUMAN BODY FOR REPLACING TRADITIONAL DIRECT SWITCH KEY

7. TOGGLE MODE BY PAD OPTION(TOG PIN) Q PIN IS CMOS OUTPUT

8. ALL OUTPUT MODES CAN BE SELECTED ACTIVE HIGH OR ACTIVE LOW BY PAD OPTION(AHLB PIN)

9. AFTER POWER-ON HAVE ABOUT 0.5SEC STABLE-TIME, DURING THE TIME DO NOT TOUCH THE KEY PAD, AND THE FUNCTION IS DISABLED

10. 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