The three TMUX821x variants share a datasheet. The text in section 8.4 says:
Turn-On time (t ON ) is defined as the time taken by the output of the TMUX8211, TMUX8212, and TMUX8213 to rise to a 90% final value after the SELx signal has risen (for NC switches…
The following table helps select th e right multiplexer and switch with Mid Voltage 25V =< VSIGNAL =< 99V in different configurations:
Precision , Protection , Automotive , Extended Temperature
Configuration
16:1
MUX36S16
MUX506
…