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ISO7721: Optocoupler or Optoisolator Alternate

Part Number: ISO7721
Other Parts Discussed in Thread: ISO1212, ISO1211

Hi Team,

I am looking for optoisolator/optocoupler alternate. 

24V digital to 3.3V digital and vice versa is the requirement.  We are using PC817. 

ISO77X pparts supports max. 6V. Can you please suggest an alternate which can withstand 24V with multiple channels?

Kindly revert.