TMUX136: TMUX136 for SMBus application

1. The TMUX136 supports up to 6100 MHz. (There are cheaper switches like the TS5A23157.)

2. The TMUX136 is a passive switch; the switch itself does not drive its outputs (the A/B pins are not even called outputs) and does not care about any capacitive load.

3. This device creates a direct connection between the A and B pins.

Hey Randy,

Randy Chen said:

If TMUX136MRSER can be used for 1MHz application?

TMUX136 is more than enough. The bandwidth of the device is 6.1GHz.

Randy Chen said:

What is the maximum C_load that TMUX136 can support?

This is a little trickier to answer. You can really think of the switch as just a passive device which can be modeled with passive components (see : What if my Analog Switch/Multiplexer is Missing a PSpice Model? for an example).
Once you thevenize the circuit with the load, you could in theory solve the RC constant, then using that and the known cutoff you would need to get the 6.1GHz the mux can support you can use this to solve for what the max load on top of the TMUX136 you can have in signal path, which should be a few hundreds of pF at least. That being said, the mux itself doesn't really care about the load. It's a passive device so solving this way is highly not recommended. You should evaluate how much capacitance your bus currently has and how much budget you have to add and see if the capacitance of the TMUX136 can fit here.
I would suspect that it should be fine with such a low operating frequency and On-capacitance. 

Randy Chen said:

Is the signal from input to output isolation or transparent?

Can you elaborate here more? I'm not sure I follow what isolation or transparent mean. The device will either connect or disconnect the signal path.

Thanks,
Rami