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SN74CB3Q3251: Unused SN74CB3Q3251outputs

Part Number: SN74CB3Q3251


Hi, 

We are using this part in one of our boards - we don't need to use all the b1-b8 input/output pins. 

Can you clarify if we can leave them unconnected? or do they need to be connected to VSS/GND? if so, please clarify the reason. 

Thanks!

Anna