SR Latch
Updated Feb 15, 2026
Alias: RS-NOR Latch
Definition
A latch made typically out of two NOR gates pointing into each other, with two inputs, Set and Reset, and typically two outputs, Q and Q' (not Q).
Pulsing the "set" sets Q to 1, and Q' to 0 Pulsing the "reset" sets Q to 0, and Q' to 1 Putting a pulse through both can set Q and Q' to the same value, both 0 or 1.