I have actually a solution based on a multiplexer (CD4051) which drives 8 outputs, either at 0V or 3.3V (the input is at 3.3V). Each output of the multiplexer drive a NMOS and the goal is to have a signal behind the NMOS driven to 0V or floating. In an another words I drive 7 signals at 0V and one signal is not driven (floating). The multiplexer is used to extend the gpio of my microcontroller (3 to 8 and could be more by adding more cascading multiplexers). My question is could I do the same without the NMOS? I mean, is it possible to have a component (multiplexer) which has an output either at 0V or floating? To be more accurate, could it be possible to have 7 outputs at 0V and one floating?
I guess it is not feasible but I prefer to ask, in case of :)
Thanks in advance