TMUXHS4212: inter-pair output skew between units

Hi team,

    My customer would like to use many units of TMUXHS4212 to design a 324:1 mux. They need smallest skew(Tsk). They would like to estimate the inter-pair output skew between units (channels from different units). I think it would be as 10ps max as between channels. Is it correct? 

    The data rate is just 50Mbps, but TMUXHS4212 is the lowest Tsk(max) we found, so they will choose this part number.

Thanks.