Transparent latch

A transparent latch is an electronic data storage[?] device[?] with a data input, an enable input and a data output. Let us call these D, E and Q respectively. When E is high, Q = D. In other words, the latch is "transparent". When E is low, Q maintains the value it had when E was last high. In this state, the latch stores data.

In synchronous digital circuits, flip-flops are often preferred to transparent latches.

Transparent latches are available as integrated circuits, usually with multiple latches per circuit. For example, in the ubiquitous 7400 series[?] of integrated circuits, type 7475 is a quadruple transparent latch.