SR Latch

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jwxie518

Joined Oct 15, 2010
4
Hi guys, A very simple question and hopefully someone can answer this :)

The Q and notQ in SR-latch remembers the previous value of S and R, respectively, am I correct?

Thank you very much!
 

SgtWookie

Joined Jul 17, 2007
22,220
Yes, that is correct.

When first powered on, Q and Q\ will be in an unknown state. There needs to be an input to S or R before the output will be in a known state.
 

JDT

Joined Feb 12, 2009
657
In the classic NOR S-R latch, it's worth noting that /Q is not always the compliment of Q.

When both inputs are high, both outputs will be low. If one input goes low followed by the other, the output remembers which was the last to go low.
 

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