Other Parts Discussed in Thread: TMUX6234, , TMUX7219
I think that the TMUX7234 and TMUX6234 PSPICE models are incomplete because they do not have definitions for any of the subcircuits used in the model. I was initially trying to import these into Qspice and was getting an error for missing subcircuits when running a simulation ("Fatal error: Error: no such subcircuit: i_vss"). I downloaded PSPICE for TI to try it there and get a similar error ("ERROR(ORPSIM-15108): Subcircuit Delay_SW_S1AD1 used by X_U2.X_U52 is undefined").
For comparison, the model for TMUX7219 is a much larger file and appears to have all of the subcircuits defined in it.