DM74LS240 National Semiconductor, DM74LS240 Datasheet - Page 3

• Manufacturer Part Number: DM74LS240
• Description: (DM74LS240 / DM74LS241) Octal TRI-STATE Buffers/Line Drivers/Line Receivers
• Manufacturer: National Semiconductor

Switching Characteristics
Note 54LS Output load is C
Symbol
t
t
t
t
t
t
t
t
t
t
PLH
PHL
PZL
PZH
PLZ
PHZ
PLH
PHL
PZL
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
L
Parameter
e
50 pF for t
PLH
t
PHL
t
PZL
at V
and t
CC
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
e
PZH
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
5V and T
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
45 pF
667
45 pF
667
45 pF
667
45 pF
667
5 pF
667
5 pF
667
150 pF
667
150 pF
667
150 pF
667
150 pF
667
Conditions
A
3
e
25 C
LS240
LS241
LS240
LS241
LS240
LS241
LS240
LS241
LS240
LS241
LS240
LS241
LS240
LS241
LS240
LS241
LS240
LS241
LS240
LS241
DM54LS
Max
18
18
18
18
30
30
23
23
25
25
18
18
DM74LS
Max
14
18
18
18
30
30
23
23
25
25
18
18
18
21
22
22
33
33
26
26
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns