Switching Characteristics
V
CC
e
5V
Symbol
Parameter
T
A
e
25 C (See Section 1 for Test Waveforms and Output Load)
DM54 74
Conditions
Min
LS245
Max
12
C
L
e
45 pF
R
L
e
667X
12
40
40
C
L
e
5 pF
R
L
e
667X
25
25
16
C
L
e
150 pF
R
L
e
667X
17
45
45
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Units
t
PLH
t
PHL
t
PZL
t
PZH
t
PLZ
t
PHZ
t
PLH
t
PHL
t
PZL
t
PZH
Propagation Delay Time Low-to-High-Level Output
Propagation Delay Time High-to-Low-Level Output
Output Enable Time to Low Level
Output Enable Time to High Level
Output Disable Time from Low Level
Output Disable Time from High Level
Propagation Delay Time Low-to-High-Level Output
Propagation Delay Time High-to-Low-Level Output
Output Enable Time to Low Level
Output Enable Time to High Level
3
NSC [ NATIONAL SEMICONDUCTOR ]
