- Published in issue 12/1996 on page 97
Electrically isolated I²C bus
In some cases, it is desirable for the input and output of an PC bus to be electrically isolated. This is achieved in the present circuit by a couple of oproisolators. Since tbe bus is bidirectional, at least two optoisolators are needed Ior the SDA line and two for tbe SCL Iine.