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TLK1521 and TLK2711A failsafe

does TLK1521 and TLK2711A receivers need an external bias pullup and pulldown resistors for failsafe?

if the receiver is not connected (driver is unpowered or powerd down), both RXP and RXN inputs are tied to the internal termination, so Vid is undefined below 200mV. also, any noise voltage may be coupled to the receiver.

thanks in advance.