Electrical Engineering › Section S · Logic gates and Boolean algebra › Topic S.2

Programmable and fixed-function gates: logic levels and noise margins

A gate on paper is ideal; a gate on a board has voltage limits, a delay, a power draw and a limit on what it can drive. This topic covers how programmable devices form gates, the 74-series families, the four voltage limits that define logic levels and noise margins, speed and power, fan-out, and how gates fail.