4 Touch Key BS814A-1 Characteristics Touch Key : BS814A-1 10 MSOP 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 OUT4 6 5 4 3 2 1 BAT1 VDD CR2032 C1 104 KEY1 U1 (0-25)PF KEY2 2 CT3 (0-25)PF KEY4 VDD VSS KEY1 OUT1 KEY2 OUT2 KEY3 OUT3 KEY4 OUT4 VDD 10 9 OUT1 R1 1K LED1 8 OUT2 R2 1K LED2 7 OUT3 R3 1K LED3 6 OUT4 R4 1K LED4 CT2 (0-25)PF KEY3 1 GND CT1 CT4 (0-25)PF 3 4 5 BS814A-1 10MSOP