40V de-multiplexing chip??

Hello All,
This is my first post and hopefully someone can help me.

I have a square wave signal that has + or - 2V oscillations around 40V (it runs at around 100 to 200kHz). I need to pass this signal through a de-multiplexer but cannot find a multiplexer which can handle ~40V (they all seem to be designed for input voltages of 15V or less). The only solution I can think of is to send the signal through a high pass filter, then through the multiplexer, and then recombine it with a DC offset. Does anyone have a better idea or do you know of lightweight, small multiplexer chips that can handle this voltage?

If the only solution is to high pass filter it then recombine it with a dc offset, what is the best way to recombine the dc offset? I know I can use opamps but is there a simpler, lighter way? Thanks

You can recombine the offset by just coupling the signal through a capacitor. Connect a resistor at the capacitor output to a 40V source. The time-constant of the resistor and capacitor must be high enough to pass the lowest frequency without attenuation. For 100kHz the time constant should be greater than 2µs.