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THVD2450: Input Protection for THVD2450 and SN65HVD1786

Part Number: THVD2450
Other Parts Discussed in Thread: SN65HVD1786

Tool/software:

**Note - two parts included here, THVD2450 and  SN65HVD1786 

Team - can you please help with below question 

What happens if a signal is applied to inputs A and /or B without power is applied to Vcc? What does the input protection circuitry look like?  An equivalent diagram is okay.  I am trying to perform a sneak circuit analysis. 

Thank you