SN74AVC16827: Do I need pullup/pulldown resistor if I leave some channels of SN74AVC16827 open?

Yazhu Liu

Part Number: SN74AVC16827

Hi Team,

Our customer would like to use only 6 channels of SN74AVC16827 and leave other 4 channels(A6-A10) open, and they'd like to know whether they should put the pullup/pulldown resistor on A6-A10.

Thanks.

Best Regards,

Livia Liu

over 6 years ago

0 Clemens Ladisch over 6 years ago

Guru 317250 points

Unused inputs must have a valid logic level; connect them directly to either V_CC or GND. (You do not need resistors for that.)
Unused outputs can be left open.

0 Yazhu Liu over 6 years ago in reply to Clemens Ladisch

TI__Intellectual 1410 points

Thanks.

Would there be a problem if we leave the unused inputs open?

Best Regards,

Livia Liu

0 Clemens Ladisch over 6 years ago in reply to Yazhu Liu

Guru 317250 points

Open inputs can float to any voltage. See [FAQ] How does a slow or floating input affect a CMOS device?

Logic

Logic forum

SN74AVC16827: Do I need pullup/pulldown resistor if I leave some channels of SN74AVC16827 open?