I am using 6N137 opto-isolator for my circuit.
I have attached schematic for the same. I am giving Input and Enable from SMPS as shown and ground is same. VCC and EN is 3.3V from SMPS.
But while checking output voltage when Input and EN is High ( VCC is also High ie 3.3V ), I am getting Logic High at output (3.3V).
Ground for both is same.
Link for datasheet : http://www.vishay.com/docs/84732/6n137.pdf
Can anyone help me for above issue.
Thanks in advance.