Datasheet

Characteristics DA108S1 / DA112S1
4/8
Figure 5. Application 1: ISDN interface protection, residual lightning surges at
transformer secondary are suppressed by DA108S1
Figure 6. Application 2: microcontroller I/O port protection
Note: IMPORTANT : DA108S1 must be connected to the reference voltages through REF1 and
REF2.
A
B
A
B
GND
GND
TPIxx
TPIxx
LINE SIDE
LOGIC SIDE
DA1x
S
1x
Vcc
Vcc
Vcc
Vcc
Vss
Vss
Vss
Vss
DA1x
S
1x
4-6 bit input port
Vcc
Vcc
Vcc
Vcc
Vcc
I/O
I/O
I/O
I/O
μc