standard 4-touch keys bs814a-2 + ht48r002...standard 4-touch keys bs814a-2 + ht48r002...
TRANSCRIPT
![Page 1: Standard 4-Touch Keys BS814A-2 + HT48R002...Standard 4-Touch Keys BS814A-2 + HT48R002 Characteristics Touch Keys : BS814A-2 8-pin SOP + HT48R002 10-pin MSOP Operating voltage : 2.2V](https://reader034.vdocuments.mx/reader034/viewer/2022042414/5f2f5da921c36a0b8739de44/html5/thumbnails/1.jpg)
Standard 4-Touch Keys BS814A-2 + HT48R002
Characteristics Touch Keys : BS814A-2 8-pin SOP + HT48R002 10-pin MSOP
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
4 touch inputs
2 wire serial interface Data Output : NMOS with internal pull high resistor Clock Input : with internal pull-high resistor
Sensitivity adjustment using an external capacitor
Minimal number of external components
![Page 2: Standard 4-Touch Keys BS814A-2 + HT48R002...Standard 4-Touch Keys BS814A-2 + HT48R002 Characteristics Touch Keys : BS814A-2 8-pin SOP + HT48R002 10-pin MSOP Operating voltage : 2.2V](https://reader034.vdocuments.mx/reader034/viewer/2022042414/5f2f5da921c36a0b8739de44/html5/thumbnails/2.jpg)
Applications
Consumer Products, Home Appliances, Industrial Control, Health Care Products, etc.
Application Circuit
KEY2
KEY1
104C1
CR2032
VDD
BAT1
OUT34
KEY23
KEY01
KEY12
OUT15
OUT25
VDD 8
GND7
U1
BS814A-2 8SOP
KEY3DATA
CLOCK(0-25)PF
CT3
(0-25)PF
CT2
(0-25)PF
CT1
GND
VDD
1234
JP1
KEY4
(0-25)PF
CS4
VDDDATACLOCK
GND
VDD1
PA62
PA53
PA7/RES4
PA45
PA36PA2/INT7
PA1/TMR8
PA09
VSS 10
U1
HT48R002_1OMSOP
D1LED
D2LED
R24.7K
R34.7K
VDD
C110UF C2
0.1UF
D3LED
D4LED
R44.7K
R14.7K
VDD
1234
P1
CN1
GNDVDD
DATACLOCK
HT48R002_10MSOP
BS814A-2 8SOP
KEY2
KEY1
KEY3
KEY4
DATA
CLOCK
VDD
VSS