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choosing optocoupler regd.

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Achilles40

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hi,
In my final project, I am geting signals from digital input port to the controller through an optocoupler.
The optocoupler shifts to logic one at 1.4 V of input supply.
What i need is An optocoupler that shifts to high level in 10-12 V.
Can you suggest me some optocouplers?
Or What factors to be considered(parameters) to select the optocouplers for the above case
Thanks in advance.
Regards,
Achilles
 

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