TMUX1109: Unused Channel Terminations

Kazuhiko Hirano

Part Number: TMUX1109
Other Parts Discussed in Thread: TMUX1104

Hello,

My customer use only channel A.
In this case, can they leave S1B, S2B, S3B, S4B and DB floating?
If not, please let them know recommended terminations for those pins.

Best regards,

K.Hirano

over 3 years ago

0 Rami Mooti1 over 3 years ago

TI__Mastermind 35528 points

Hello Kazuhiko,

If only one channel is being used, you can leave the signal pins floating. In higher speed applications it's good practice to terminate these to ground through a 50ohm resistor, however.

See TI Precision Labs - Can I leave unused pins floating?

What voltages are they using? If it's between 1.08 and 5.5V (they aren't using dual supply) the TMUX1104 is a 4:1 1 channel that may be a good replacement if they aren't using the second channel of the TMUX1109.

Thanks,
Rami

0 Kazuhiko Hirano over 3 years ago in reply to Rami Mooti1

TI__Genius 15078 points

Rami,

Thank you for your response.

Best regards,

K.Hirano

Switches & multiplexers

Switches & multiplexers forum

TMUX1109: Unused Channel Terminations