Quad gate

“The NAND gate has the property of functional completeness. That is, any other logic function (AND, OR, etc.) can be implemented using only NAND gates. An entire processor can be created using NAND gates alone.’ ” –Steven Colyer

Today’s WhatIs.com Word of the Day is quad gate. A quad gate an IC (integrated circuit or chip) containing four logic gates. The quad NAND gate is of particular interest, because any of the basic logic functions can be derived by connecting multiple NAND gates together. This feature makes the quad NAND gate useful as a “universal digital substitute,” and also can help students learn how digital logic circuits work.