74HC173 Ic I need help ?

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hello ,
I want to know about address letch 74HC173 Ic , actually I have seen that 74HC173 Ic is use in processor I am not understanding why they use that Ic in processor

If someone know please tell me reason whats the use of 74HC173 Ic
 

It's a quad D flip-flop. It's used to keep data bits at the output until a clock. Whatever you put at the input won't affect the output until a clock pulse is sent. When that happens all you had at the output BEFORE will be replaced with what it was a the input when the clock was sent.

I don't know why they use it, if you had a circuit you can post it so we can see it and think the application of the IC on that circuit. Maybe the output ports of the MCu are insufficient and they keep data in the IC and use the same pins to do another thing.

It comes to my mind that it's used as buffer, but there are ICs that do the same with less pins so I don't really know the reason.

Hope it helped you.
 

I have no idea how it is used in your circuit, but if this is in a direct connection to the processor it could be that this circuit is used to store a part of the address bus or som other control signals.

If you want a more direct answer you need to add som more info, or a schematic of the circuit you want to know about.
 

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