SN74CBTLV3257: how to handle unused pin

TAISEI KONO

Prodigy 20 points

Part Number: SN74CBTLV3257

Hi, expert.

Please tell me how to handle the unused B pin(1B1,1B2...).

Thanks.

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 297360 points

They can be left floating; see [FAQ] Frequently Asked Questions about signal switches and multiplexers.

+1 Parker Dodson over 4 years ago

TI__Mastermind 48327 points

Hi Taisei,

Clemens is correct - unused analog I/O pins can be left floating. However in higher speed applications if you want to reduce the chance of reflections caused by the IC itself it is recommended to terminate unused pins with 50 Ohm resistors to ground.

If you have any other questions please let me know!

Best,

Parker Dodson

Switches & multiplexers

Switches & multiplexers forum

SN74CBTLV3257: how to handle unused pin