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TMP464: _THERM pull-up to 5V

Part Number: TMP464

The datasheet parametric table for TMP464 doesn't specify a recommended max pull-up voltage for the  _THERMx outputs.  

The pin functions table alludes to a limit of 3.6V, but this is far, far below abs,max = 6V for this pin.

Customer wants to power TMP464 with 1.8V, but have _THERMx pins pulled up to 5V.

Is this OK?  Still well below abs max.

Is there an ESD protection diode from _THERM to V+ of the device that would get in the way here?

Thanks, Best, Steve