Tool/software:
The datasheet for TMUX6213 has a -3dB specification for +-5V & +-15V supply voltage conditions but only has a response curve for the +-15V condition, which has a lower bandwidth spec. (56MHz vs 135MHz).
I have tried using the PSpice model to infer the relative performance but it doesn't appear to model this characteristic faithfully.
Please could you provide response curves for +-5V supply conditions and any others you may have access to for the component?