Standard 12-Touch Keys -- BS8112A-3 + HT48R003

Standard 12-Touch Keys
BS8112A-3 + HT48R003
Characteristics
 Touch Keys : BS8112A-3
16-pin NSOP + HT48R003 16-pin NSOP
 Operating voltage : 2.2V ~ 5.5V
 Low standby current
 Auto-calibration
 Reliable touch key detections
 High power supply rejection
 Standby and normal operating power modes
 Maximum key on duration time detection
 Power supply voltage drop rejection function
 12 touch key inputs
2
 I C interface
 3 Option
◆
◆
◆
LSC ‒ lower standby current
Key12 / IRQ function select
Key wakeup function
 Sensitivity adjustment using an external capacitor
 Minimal number of external components
Applications
Consumer Products, Home Appliances, Industrial Control,
Health Care Products, etc.
Application Circuit
LED2
LED3
LED4
LED5
OUT7
OUT6
OUT5
LED1
JP1
LED6
LED7
LED9
LED8
5
4
3
2
1
LED10
LED11
LED12
GND
VDD
SDA
SCL
IRQ
CN1
OUT4
OUT3
OUT2
OUT1
OUT4
OUT3
OUT2
OUT1
OUT4
OUT3
OUT2
OUT1
5
4
3
2
1
GND
VDD
SDA
SCL
IRQ
U2
OUT8
OUT7
OUT6
OUT5
OUT4
OUT3
OUT2
OUT1
R4
R3
R2
R1
220
220
220
220
1
2
3
4
5
6
7
8
PA4
PC5
PC4
PC3
PC2
PC1
PC0
PA3
PA5
PA6
PA7
VDD
VSS
PA0
PA1
PA2
16
15
14
13
12
11
10
9
LSC
OMS
VDD
GND
IRQ
SCL
SDA
0
OptionA
0
OptionB
VDD
C1
HT48R003 16NSOP
104
BAT1
CR2032
KEY3
KEY2
KEY4
U1
KEY1
KEY5
KEY6
KEY7
1
2
3
4
5
6
7
8
KEY3
KEY4
KEY5
KEY6
KEY7
KEY8
KEY9
KEY10
KEY2
KEY1
SDA
SCL
VDD
VSS
KEY12/IRQ
KEY11
16
15
14
13
12
11
10
9
SDA
SCL
VDD
GND
IRQ
R6 1K
R5 1K
VDD
C2
104
CR2032
BAT1
BS8112A-3 16NSOP
KEY8
KEY12
KEY9
KEY11
KEY10