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I am looking for a digital isolator (2 channel) that outputs logic low when VCC(output) is powered down.
All digital isolators from TI I looked at have undetermined behavior in this case.
The only other possibility I see is putting a SN74LVC1T45 after the outputs and make use of its VCC-Isolation feature with both VCCs tied to VCC(output) of the digital isolator. According to the absolute maximum ratings of the SN74LVC1T45, it shouldn't be a problem to keep the Input for example at 5V while VCC is at GND. I don't necessarily like putting two "voltage translators"/isolators in series, but it would be a possibility.
Is there a dedicated IC for this? Is there a more elegant solution?
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In reply to Koteshwar Rao:
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