Datasheet
GLOSSARY
SYMBOLS, TERMS, AND DEFINITIONS
1â9
POST OFFICE BOX 655303 ⢠DALLAS, TEXAS 75265
t
su
Setup time
The time interval between the application of a signal at a specified input terminal and a subsequent
active transition at another specified input terminal
NOTES: 1. The setup 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 specified.
2. The setup time may have a negative value, in which case the minimum limit defines the
longest interval (between the active transition and the application of the other signal) for which
correct operation of the digital circuit is specified.
t
w
Pulse duration (width)
The time interval between specified reference points on the leading and trailing edges of the pulse
waveform
V
IH
High-level input voltage
An input voltage within the more positive (less negative) of the two ranges of values used to represent
the binary variables
NOTE: A minimum is specified that is the least-positive value of high-level input voltage for which
operation of the logic element within specification limits is to be expected.
V
IL
Low-level input voltage
An input voltage within the less positive (more negative) of the two ranges of values used to represent
the binary variables
NOTE: A maximum is specified that is the most-positive value of low-level input voltage for which
operation of the logic element within specification limits is to be expected.
V
OH
High-level output voltage
The voltage at an output terminal with input conditions applied that, according to product specification,
establishes a high level at the output
V
OHS
Static high-level output voltage
The static and testable voltage at a DOC circuit output with input conditions applied that, according to
the product specifications, establishes a static high level at the output. The dynamic drive voltage is not
specified for devices with DOC circuit outputs because of its transient nature.
V
OL
Low-level output voltage
The voltage at an output terminal with input conditions applied that, according to product specification,
establishes a low level at the output
V
OLS
Static low-level output voltage
The static and testable voltage at a DOC circuit output with input conditions applied that, according to
the product specifications, establishes a static low level at the output. The dynamic drive voltage is not
specified for devices with DOC circuit outputs because of its transient nature.
V
T+
Positive-going input threshold level
The voltage level at a transition-operated input that causes operation of the logic element according
to specification as the input voltage rises from a level below the negative-going threshold voltage, V
Tâ
V
Tâ
Negative-going input threshold level
The voltage level at a transition-operated input that causes operation of the logic element according
to specification as the input voltage falls from a level above the positive-going threshold voltage, V
T+