4 Touch Key -- BS814A-1

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
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