Absolute Maximum Ratings
(Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
DIR or G
7V
A or B
5 5V
Operating Free Air Temperature Range
b
55 C to
a
125 C
DM54LS and 54LS
DM74LS
0 C to
a
70 C
b
65 C to
a
150 C
Storage Temperature Range
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
Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Parameter
Min
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
b
55
DM54LS245
Nom
5
Max
55
Min
4 75
2
07
b
12
DM74LS245
Nom
5
Max
5 25
Units
V
V
08
b
15
45
2
V
mA
mA
C
12
125
0
24
70
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
V
I
HYS
V
OH
Parameter
Input Clamp Voltage
Hysteresis (V
T
a
b
V
T
b
)
High Level Output Voltage
Conditions
V
CC
e
Min I
I
e b
18 mA
V
CC
e
Min
V
CC
e
Min V
IH
e
Min
V
IL
e
Max I
OH
e b
1 mA
V
CC
e
Min V
IL
e
Min
V
IL
e
Max I
OH
e b
3 mA
V
CC
e
Min V
IH
e
Min
V
IL
e
0 5V I
OH
e
Max
V
OL
Low Level Output Voltage
V
CC
e
Min
V
IL
e
Max
V
IH
e
Min
V
CC
e
Max
V
IL
e
Max
V
IH
e
Min
V
CC
e
Max
I
OL
e
12 mA
I
OL
e
Max
V
O
e
2 7V
V
O
e
0 4V
A or B
DIR or G
V
CC
e
Max V
I
e
2 7V
V
CC
e
Max V
I
e
0 4V
V
CC
e
Max (Note 2)
Outputs High
Outputs Low
Outputs at Hi-Z
Note 1
All typicals are at V
CC
e
5V T
A
e
25 C
Note 2
Not more than one output should be shorted at a time not to exceed one second duration
Min
Typ
(Note 1)
Max
b
1 5
Units
V
V
02
DM74
DM54 DM74
DM54 DM74
DM74
DM54
DM74
27
24
2
04
34
V
04
04
05
20
b
200
V
I
OZH
I
OZL
I
I
I
IH
I
IL
I
OS
I
CC
Off-State Output Current
High Level Voltage Applied
Off-State Output Current
Low Level Voltage Applied
Input Current at Maximum
Input Voltage
High Level Input Current
Low Level Input Current
Short Circuit Output Current
Supply Current
mA
mA
mA
mA
mA
mA
V
I
e
5 5V
V
I
e
7V
01
01
20
b
0 2
b
40
b
225
V
CC
e
Max
48
62
64
70
90
95
mA
2
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