Subject
Year
: Digital System
: 2009
Latches
Chapter 14
Overview
• Using logic gates to construct basic latches
• Explain the different between an S-R Latch and D Latch
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Latches
The latch is a type of temporary storage device that has
two stable states (bistable) and is normally placed in a
category separate from that of flip-flops. Latches are
similar to flip-flops because they are bistable devices
that can reside in either of two states using a feedback
arrangement, in which the outputs are connected back to
the opposite inputs. The main difference between
latches and flip-flops is in the method used for changing
their state.
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S-R (Set-Reset) Latches
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S-R (Set-Reset) Latches
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S-R (Set-Reset) Latches
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74LS279
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Application
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The Gated S-R Latch
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The Gated D Latch
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