DESIGNING FOR OPTOCOUPLERS WITH BASE PIN
Optocouplers (optical couplers) are designed to isolate electrical output from input for complete elimination of noise. They have
been used conventionally as substitutes for relays and pulse transformers. Today's current technology in the area of microcom-
puters creates new applications for optocouplers.
This manual describes the characteristics of typical optocouplers. Also included are notes on designing application circuits for
typical optocouplers (with a base pin) for better comprehension. NEC's typical optocouplers with or without base pins are listed
on the following pages.