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Do digital signal isolators shift the level of the signal

I am using 2 digital signal isolators, the ISOW7841 and the ISO7730.

The datasheet does not seem to explicitly say that if a signal coming from the 5V side comes out 3.3V on the other side or vice versa. I just want to make sure.

Do digital signal isolators inherently shift the voltage level of the signal?

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