Absolute Maximum Ratings
(See Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
Input Voltage
Storage Temperature Range
7V
7V
b
65 C to
a
150 C
Note
The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation
Operating Free Air Temperature Range
b
55 C to
a
125 C
DM54LS
DM74LS
0 C to
a
70 C
Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
t
W
t
SU
t
H
T
A
Parameter
Min
Supply Voltage
High Level Input Votage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Pulse Width
(Note 2)
Enable High
Enable Low
2)
2)
15
15
5
v
20
v
b
55
DM54LS373
Nom
5
Max
55
07
b
1
DM74LS373
Min
4 75
2
08
b
2 6
Units
Max
5 25
V
V
V
mA
mA
ns
ns
ns
70
C
Nom
5
45
2
12
15
15
5
v
20
v
125
0
24
Data Setup Time (Notes 1
Data Hold Time (Notes 1
Free Air Operating Temperature
Note 1
The symbol (
v
) indicates the falling edge of the clock pulse is used for reference
Note 2
T
A
e
25 C and V
CC
e
5V
’LS373 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
V
I
V
OH
Parameter
Input Clamp Voltage
High Level Output Voltage
Conditions
V
CC
e
Min I
I
e b
18 mA
V
CC
e
Min
I
OH
e
Max
V
IL
e
Max
V
IH
e
Min
V
CC
e
Min
I
OL
e
Max
V
IL
e
Max
V
IH
e
Min
I
OL
e
12 mA
V
CC
e
Min
I
I
I
IH
I
IL
I
OZH
Input Current
Input Voltage
Max
V
CC
e
Max V
I
e
7V
V
CC
e
Max V
I
e
2 7V
V
CC
e
Max V
I
e
0 4V
V
CC
e
Max V
O
e
2 7V
V
IH
e
Min V
IL
e
Max
V
CC
e
Max V
O
e
0 4V
V
IH
e
Min V
IL
e
Max
V
CC
e
Max
(Note 2)
V
CC
e
Max OC
e
4 5V
D
n
Enable
e
GND
3
DM54
DM74
b
20
b
50
Min
Typ
(Note 1)
Max
b
1 5
Units
V
V
DM54
DM74
DM54
DM74
DM74
24
24
34
31
0 25
0 35
04
05
04
01
20
b
0 4
V
OL
Low Level Output Voltage
V
mA
mA
mA
mA
High Level Input Current
Low Level Input Current
Off-State Output Current
with High Level Output
Voltage Applied
Off-State Output Current
with Low Level Output
Voltage Applied
Short Circuit
Output Current
Supply Current
20
I
OZL
b
20
b
100
b
225
mA
mA
mA
I
OS
I
CC
24
40
NSC [ NATIONAL SEMICONDUCTOR ]
