dm74als257 Fairchild Semiconductor, dm74als257 Datasheet - Page 6

• Manufacturer Part Number: dm74als257
• Description: Dm74als257, Dm74als258 3-state Quad 1-of-2-line Data Selector/multiplexer
• Manufacturer: Fairchild Semiconductor

©1984 Fairchild Semiconductor Corporation
DM74ALS257, DM74ALS258 Rev. 1.2
Switching Characteristics DM74ALS257
Over recommended operating free air temperature range.
Switching Characteristics DM74ALS258
Over recommended operating free air temperature range.
Symbol
Symbol
t
t
t
t
t
t
t
t
t
t
PLH
PHL
PLH
PHL
t
t
PLH
PHL
PLH
PHL
t
t
t
t
ZH
HZ
ZL
LZ
ZH
HZ
ZL
LZ
Propagation Delay Time,
LOW-to-HIGH Level Output
Propagation Delay Time,
HIGH-to-LOW Level Output
Propagation Delay Time,
LOW-to-HIGH Level Output
Propagation Delay Time,
HIGH-to-LOW Level Output
Output Enable Time to HIGH
Level
Output Enable Time to LOW
Level
Output Disable Time from
HIGH Level
Output Disable Time from
LOW Level
Propagation Delay Time,
LOW-to-HIGH Level Output
Propagation Delay Time,
HIGH-to-LOW Level Output
Propagation Delay Time,
LOW-to-HIGH Level Output
Propagation Delay Time,
HIGH-to-LOW Level Output
Output Enable Time to HIGH
Level
Output Enable Time to LOW
Level
Output Disable Time from
HIGH Level
Output Disable Time from
LOW Level
Parameter
Parameter
V
C
R
V
C
R
CC
L
L
CC
L
L
Conditions
Conditions
50pF,
500
50pF,
500
4.5V to 5.5V,
4.5V to 5.5V,
6
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Select
Select
Select
Select
From
From
Data
Data
Data
Data
Any Y
Any Y
Any Y
Any Y
Any Y
Any Y
Any Y
Any Y
Any Y
Any Y
Any Y
Any Y
Any Y
Any Y
Any Y
Any Y
To
To
Min.
Min.
2
2
4
5
4
5
2
3
2
2
3
5
5
5
2
3
Max. Units
Max. Units
10
12
18
22
16
18
10
15
20
25
18
18
10
18
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8
7
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns