3/8

AN589

Figure 3. Equivalent circuit of both driver and receiver adjacent lines

Figure 4. Crosstalk simulation behavior

This simulation gives the following parameters:

– VR peak : +/- 11.7 V

– Time constant : 0.2 us

Despite their large amplitude, these peaks would not cause any problems. Their short duration means that

they would be filtered out by the RS232 input sampling operation.

R1

R'2

R2

R'1

Vr

Ve

+/- 12V

C

0

5V/Div

0

5V/Div

Ve

Vr

20

s/div