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SN74AXC4T245-Q1: floating input

Part Number: SN74AXC4T245-Q1

Hi team,

according to datasheet, input pin should not be left open. however, here is an FAQ, is shows that AXC device can leave unused input floating. https://e2e.ti.com/support/logic-group/logic/f/logic-forum/788628/faq-what-should-be-done-with-unused-i-o-pins-of-the-level-translator-devices 

Could you help to confirm which one is correct?

my customer fixed the PCB and left two unused channel input pin floating, is there any risk? 

B&R

Lijia