For unpowered condition, the TCANC340x-Q1 is designed to be a passive or no load to the CAN bus. This is because the bus pins were designed to have low leakage currents to not load the bus. This design consideration is critical if some nodes of the network are unpowered while the rest of the network remains operational.

For unpowered scenario, the logic pins also have low leakage currents. The pins do not load other circuits which may remain powered.