I learned that setup time for latches is the time before clock's falling edge in which data needs to remain stable.

Say that just as clock's rising edge arrives, data become stable, will Q become valid after Tpdq?

Thanks.

 

That depends on if the latch captures data on the rising or falling clock edge.

 

This is a transparent latch, meaning it passes data when clock is up.

 

In that case, I'd say yes. Best to verify with the datasheet though.

 

You need to specify the part number.
If it is a transparent latch that latches the data on the falling edge, e.g. SN7475, no setup time on the rising edge is required. Setup time for SN7475 is 20ns prior to falling edge.

 

In that case, I'd say yes. Best to verify with the datasheet though.

On second thought, there might be a different time specification from clock to Q-Data. That's why you need to verifiy with the datasheet.

 

Thank you guys!