AN-1078 Edge Triggered Latch Using GPAK

Set/Reset latches (RS latches) are very useful memory devices in digital logic design. A traditional RS latch is level triggered and is useful when the set and reset inputs holds its value high or low. When the set and reset inputs are one-shot pulses and their rising edges are needed as triggers, RS latch becomes ineffective because of potential timing conflicts at the input. An edge-triggered latch can be used to avoid such conflicts. The following application note uses a SLG46721 GreenPAK to construct an edge-triggered latch; any GreenPAK with two resettable digital flip-flops (DFF) and an inverter can be used.


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