DS560MB410: Re-Driver and MUX / De-MUX speed

Hi Gal,

Glad to hear that you're interested in DS560MB410.

Regarding your use case, please note that PAM4 is not supported in the "cross" configuration mode of the cross point.  Because of this, I'd recommend that you consider switching between fanout modes.  I believe this will functionally accomplish your goal while avoiding the "cross" mode case.

1. Is this possible on the fly using one or more of the MUXSEL IO’s or do we have to perform this cross only with channel register change?
   Yes, it is possible to accomplish this using the MUXSEL pins.  Note that the diagram below shows the impact of switching MUXSEL state.
2. Also what is the speed of the transition between lanes? 
   The Turn-ON time (SEL to Output) and Turn-OFF time (SEL to Output).
   For a previous generation device with similar architecture (DS280MB810), this time was about 1.4 us between MUXSEL state change to output change.  Is there a target time for your application?  If so, I could check on DS560MB410 to see if it meets your target.
   https://e2e.ti.com/support/interface-group/interface/f/interface-forum/837480/ds280mb810-switching-time-difference-of-pin-control-crosspoint-mode-with-different-reg_0x07-5-configuration
   

Thanks,

Drew