The DRV632 has a !MUTE (active low) pin which puts the output in a low-impedance state when muted. The DRV632 datasheet specs Zo, the output impedance when muted, as 110mOhms. The DRV603 has an ENable input (active high) which enables the driver output. However, what I can't find in the DRV603 datasheet is any indication of the output state when it is disabled (EN low). Does the EN pin of the DRV603 put the output in a low-impedance state with a Zo similar to the DRV632 (ie equivalent to !MUTE), or does it go to a high-impedance state? I'm not seeing any specification in the datasheet that confirms the output state when disabled. Thanks for clarifying this and/or pointing me to the relevant page in the datasheet.