BS801C Holtek Semiconductor Inc., BS801C Datasheet - Page 9

• Manufacturer Part Number: BS801C
• Description: Touch Key
• Manufacturer: Holtek Semiconductor Inc.

Application Circuit
Note:
Rev. 1.00
If the output is connected to an MCU input with an internal pull high resistor then the pull high resistor on the ap-
plication circuit is not required.
Touch
Touch
Touch
Key0
Key3
Touch
Touch
Key0
Key1
Key
Cs
Cs
0pF~
10pF
0pF~
10pF
Cs
0pF~
10pF
.
.
.
VSS
VSS
Cref
VSS
Cref
Cref
Key0
Key3
Key
Key0
Key1
LHF
OKW
LHF
LHF
.
.
.
BS804C
BS801C
BS802C
Kout0
Kout1
Kout0
Kout3
Kout
VDD
VDD
VDD
SCD
.
.
.
9
VDD
VDD
VDD
R
R
R
0.1uF
R
R
0.1uF
0.1uF
VDD
VDD
VDD
VDD
VDD
BS801C/02C/04C/06C/08C
INTB or
Port
MCU
December 2, 2009