Datasheet

5-5
FAST AND LS TTL DATA
SN54/74LS147 • SN54/74LS148 • SN54/74LS748
AC CHARACTERISTICS (V
CC
= 5.0 V, T
A
= 25°C)
SN54/74LS147
Sbl
From To
Wf
Limits
Ui
T C di i
Symbol
From
(Input)
To
(Output)
Waveform
Min Typ Max
Unit Test Conditions
t
PLH
Any
Any
In-phase
12 18
ns
C15F
t
PHL
A
ny
A
ny
p
output
12 18
ns
C
L
= 15 pF,
t
PLH
Any
Any
Out-of-phase
21 33
ns
L
p,
R
L
= 2.0 kΩ
t
PHL
A
ny
A
ny
p
output
15 23
ns
SN54/74LS148
SN54/74LS748
Sbl
From To
Wf
Limits
Ui
T C di i
Symbol
From
(Input)
To
(Output)
Waveform
Min Typ Max
Unit Test Conditions
t
PLH
1 thru 7
A0 A1 or A2
In-phase
14 18
ns
C15F
t
PHL
1
th
ru
7
A0
,
A1
, or
A2
p
output
15 25
ns
C15F
t
PLH
1 thru 7
A0 A1 or A2
Out-of-phase
20 36
ns
C15F
t
PHL
1
th
ru
7
A0
,
A1
, or
A2
p
output
16 29
ns
C15F
t
PLH
0 thru 7
EO
Out-of-phase
7.0 18
ns
C15F
t
PHL
0
th
ru
7
EO
p
output
25 40
ns
C15pF
t
PLH
0 thru 7
GS
In-phase
35 55
ns
C
L
= 15 pF,
R
L
= 2.0 kΩ
t
PHL
0
th
ru
7
GS
p
output
9.0 21
ns
R
L
=
2
.
0
kΩ
t
PLH
EI
A0 A1 or A2
In-phase
16 25
ns
t
PHL
EI
A0
,
A1
, or
A2
p
output
12 25
ns
t
PLH
EI
GS
In-phase
12 17
ns
t
PHL
EI
GS
p
output
14 36
ns
t
PLH
EI
EO
In-phase
12 21
t
PHL
EI EO
I
n-p
h
ase
output
28
30
40
45
ns
(LS148)
(LS748)