tw Pulse Duration (Width)
JEDEC – The time interval between the specified reference points on the two transitions of the pulse waveform.
TI – The time interval between specified reference points on the leading and trailing edges of the pulse waveform.
A minimum value is specified that is the shortest interval for which correct operation of the digital circuit is specified (see Figure below). Pulse duration is tested by applying a pulse to the specified input for a time period equal to the minimum specified in the data sheet. The device passes if the outputs switch to their expected logic levels and fails if they do not. Pulse-duration times are not checked simultaneously with other inputs or other recommended operating conditions.