Word of the Day
3 February 2026
sequential logic
A form of digital circuit logic where the current outputs depend not only on the current inputs, but also on a memory of past inputs and states.
Why this one
The dividing line with combinational logic is memory: a combinational circuit forgets everything the instant inputs change, while sequential logic holds a state, which is why it needs a clock to say when the next state is allowed to take effect. Relay ladder rungs that latch themselves in are the same idea in copper.
In use
That interlock won't drop out on its own because it's sequential logic, so it stays latched until we give it the reset.
Written by our editors to show how the term is used, not a recorded quotation.