As we know, a 2:1 multiplexer selects between two inputs depending upon the value of its select
input. Also, a latch holds its previous value when its enable pin is in a
particular state (‘0’ for positive level sensitive latch and ‘1’ for negative
level sensitive latch).
So, to build a
positive level sensitive latch from a multiplexer, short the output with IN0
pin of the multiplexer and connect data input to IN1 and Clock input to SEL pin
of multiplexer. A negative level latch can also be built similarly. Figure 1
below shows the diagram representation for the same.
 |
| Build a latch using a multiplexer |
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