4 Touch Key -- BS814A-2

4 Touch Key
BS814A-2 + HT48R002
Characteristics
 Touch Key : BS814A-2
8SOP +
HT48R002
 Operating Voltage : 2.2V ~ 5.5V
 Low standby current
 Auto-calibration
 Reliable touch key detections
 High noise rejection
 Standby and normal operating power modes
 Maximum key on duration time detection
 Power supply voltage drop rejection function
 NMOS output with internal pull high
 Provide serial interface
 Sensitivity adjustment using an external capacitor
 Minimal number of external components
10 MSOP
Application Areas
Consumer Products, Home Appliances, Industrial Control, Health Care Products, etc.
Application Circuit
VDD
D1
LED
D2
LED
D3
LED
D4
LED
VDD
C1
10UF
P1
C2
0.1UF
R1
4.7K
U1
4
3
2
1
VDD
GND
DATA
CLOCK
1
2
3
4
5
CN1
VDD
PA6
PA5
PA7/RES
PA4
VSS
PA0
PA1/TMR
PA2/INT
PA3
R2
4.7K
R3
4.7K
R4
4.7K
10
9
8
7
6
HT48R002_1OMSOP
JP1
1
2
3
4
KEY1
CT1
(0-25)PF
U1
1
KEY2
CT2
(0-25)PF
KEY3
CT3
(0-25)PF
KEY4
GND
VDD
DATA
CLOCK
CT4
(0-25)PF
2
3
4
KEY0
VDD
KEY1
GND
KEY2
OUT1
OUT3
OUT2
BS814A-2 8SOP
8
VDD
7
GND
VDD
C1
104
BAT1
CR2032
5
DATA
5
CLOCK
Similar pages