TMUX6234: TMUX6234 Configuration for Differential Signal Switching – Clarification Needed

Tool/software:

Subject: TMUX6234 Configuration for Differential Signal Switching – Clarification Needed

Hi TI Team,

I’m planning to use the TMUX6234 to route differential signal pairs, and I’d like to clarify the truth table behaviour based on the application I'm designing.

Use Case: (example)

I have 4 pairs of differential input signals, and I intend to switch two pairs to the outputs (D1 and D2) at a time. Here's the required configuration:

• A1+ → S1A → D1

• A1− → S2A → D2

• B1+ → S1B → D1

• B1− → S2B → D2

Objective:

I want to configure the device such that either:

• (A1+, A1−) pair or

• (B1+, B1−) pair
  is routed to the D1 and D2 outputs (i.e., two inputs to two outputs simultaneously).

Concern:

After analyzing the truth table from the datasheet (refer to attached image), it appears that only one source pin can be connected to a drain pin at a time. For example:

• When SEL1 = 0, S1B is connected to D1 (but not S1A).

• When SEL1 = 1, S1A is connected to D1 (but not S1B).

Thus, it seems we cannot simultaneously connect both S1A and S2A (or S1B and S2B) to D1 and D2 for differential routing as intended.

Request:

Could you please confirm if there's a way to configure TMUX6234 to support two differential pairs switching simultaneously, or would this require a different multiplexer configuration?

Thanks in advance for your guidance.

Best regards,
Manikandan V