hold time, (input) (th)

The time interval during which a signal is retained at a specified input terminal after an active transition occurs at another specified input terminal.

NOTE 1 The input hold time is the actual time interval between two signal events and is determined by the system in which the digital circuit operates. A minimum value is specified that is the shortest interval for which correct operation of the digital circuit is to be expected.

NOTE 2 The input hold time may have a negative value, in which case the minimum limit defines the longest interval (between the release of the signal and the active transition) for which correct operation of the digital circuit is to be expected.