SN74CB3Q3245: Keep Floating of unused input I/O pin

Jason Shen

Intellectual 1955 points

Part Number: SN74CB3Q3245

Dears

Could we keep the device AX and BX floating? The device have 8 I/O, but we only need 6. So we need your suggestion about how to take care of the used pin?

Thanks

Jun Shen

over 2 years ago

0 Clemens Ladisch over 2 years ago

Guru 273560 points

In most applications, unused switch I/Os can be left floating. See [FAQ] Frequently Asked Questions about signal switches and multiplexers

0 Bryan Marshall over 2 years ago

TI__Genius 10974 points

Hi Jun,

You can certainly keep the Ax or Bx pins floating if you do not need them in your application. However, it is recommended to tie these to ground if you are passing signals on the other channels that are at a high frequency to prevent noise from coupling in the system.

Let me know if you have any other questions on this.

Thanks!

Bryan

Switches & multiplexers

Switches & multiplexers forum

SN74CB3Q3245: Keep Floating of unused input I/O pin