Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

  • State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 19 subscribers
  • Views 279 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMUX1237: Schematic design review

Danilo A.
Mastermind 26940 points
Part Number: TMUX1237
Other Parts Discussed in Thread: SN74AXC4T774

Hi Team,

We have received this inquiry from our customer.

I have a new design that include a MUX to connect a FPGA or SOM to SPI flash.

I would like to know your comments about the attached schematic.

Q1) Since TMUX1237's are analog switches I don't need to have series termination resistor after them, is that correct? For other places I have the 15 Ohm in series at digital outputs to take care of reflections.

Q2) SN74AXC4T&&4 is it fine to have VCCA > VCCB, datasheet says any combination at VCCA and VCCB is fine but I have seen some devices require that, could you please confirm that and make sure isn't missing in datasheet. 

Any comments is appreciated.

Due to confidentiality reason, I will share the schematic diagram offline.

Regards,

Danilo