Standard 3-Touch Keys BS813A-1 Characteristics Touch Keys : BS813A-1 8-pin SOP Operating voltage : 2.2V ~ 5.5V Low standby current Auto-calibration Reliable touch detections High power supply rejection Standby and normal operating power modes Maximum key on duration time detection Power Supply Voltage Drop Rejection function 3 touch inputs 3 Output - NMOS with internal pull-highs Level hold, low active Sensitivity adjustment using an external capacitor Minimal number of external components Applications Consumer Products, Home Appliances, Industrial Control, Health Care Products, etc. Application Circuit JP1 VDD KEY1 U1 CT1 (0-25)PF KEY2 CT2 (0-25)PF KEY3 CT3 5 4 3 2 1 1 2 3 4 (0-25)PF KEY1 KEY0 VDD VDD KEY2 KEY1 VSS GND KEY3 KEY2 KOUT1 OUT1 KOUT3 OUT3 KOUT2 OUT2 8 VDD 7 GND 5 OUT1 5 OUT2 C1 104 R1 R2 BAT1 CR2032 VDD 1K LED1 1K LED2 1K LED3 BS813A-1 8SOP OUT3 R3 GND VDD OUT1 OUT2 OUT3