I need a bidirectional IC with on/off state.
In on state, IC should have very small impedance on the line.
In off state, IC should provide very high impedance to isolate the bus.
It's for an 3-channel line isolation. To be more specific, it's for SPI bus isolation.
No need for level shifting. Just need to be able to isolate the bus with a logic high or low.
I am looking for a IC because I want to make my board more compact, not because it cannot be done use discrete components. I have been searching all this afternoon. Most of the ICs are for I2C level shifting from high to low or low to high.
Updates: 1. Thanks for suggesting the analog IC switch. I am deciding in between analog IC switch and digital IC switch. It looks like the only difference is one is made of CMOS and one is only made of NMOS.