SN74LVC8T245: the output state when input is floating

High or low or oscillating; see footnote (3) in the recommended operating conditions.

Hello Fanbin,

Output level will be unknown if inputs are left floating. We always recommend pulling to VCC or pulling down to ground.

Please see FAQs for additional information:

• [FAQ] How does a slow or floating input affect a CMOS device?
• [FAQ] What should be done with unused I/O pins of the level translator devices?

Regards,

Josh