3 Touch Key BS813A-1 Characteristics Touch Key : BS813A-1 8 SOP Operating Voltage : 2.2V ~ 5.5V Low standby current Auto-calibration Reliable touch detections High noise rejection Standby and normal operating power modes Maximum Key on duration time detection Power supply voltage drop rejection function Level Hold, low active NMOS output with internal pull-high Provide parallel output Sensitivity adjustment using an external capacitor Minimal number of external components Application Areas Consumer Products, Home Appliances, Industrial Control, Health Care Products, etc. Application Circuit JP1 GND VDD OUT1 OUT2 OUT3 5 4 3 2 1 VDD KEY1 (0-25)PF KEY2 U1 CT1 CT2 (0-25)PF KEY3 CT3 1 2 3 4 (0-25)PF KEY1 VDD KEY2 VSS KEY3 OUT1 OUT3 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