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
7V
Operating Free Air Temperature Range
b
55 C to
a
125 C
54LS
DM74LS
0 C to
a
70 C
Storage Temperature Range
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
Recommended Operating Conditions
Symbol
V
CC
V
T
a
V
T
b
HYS
I
OH
I
OL
T
A
Parameter
Min
Supply Voltage
Positive-Going Input
Threshold Voltage (Note 1)
Negative-Going Input
Threshold Voltage (Note 1)
Input Hysteresis (Note 1)
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
b
55
54LS14
Nom
5
16
08
08
b
0 4
DM74LS14
Max
55
20
11
Min
4 75
14
05
04
Nom
5
16
08
08
b
0 4
Units
Max
5 25
19
1
V
V
V
V
mA
mA
C
45
15
06
04
4
125
0
8
70
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
Low 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
CC
e
Min I
OL
e
Max
V
IH
e
Min
V
CC
e
Min I
OL
e
4 mA
I
T
a
I
T
b
I
I
Input Current at
Positive-Going Threshold
Input Current at
Negative-Going Threshold
Input Current
Input Voltage
Max
V
CC
e
5V V
I
e
V
T
a
V
CC
e
5V V
I
e
V
T
b
V
CC
e
Max V
I
e
7V
V
CC
e
Max V
I
e
10 0V
V
CC
e
Max V
I
e
2 7V
V
CC
e
Max V
I
e
0 4V
V
CC
e
Max
(Note 3)
V
CC
e
Max
V
CC
e
Max
54LS
DM74
b
20
b
20
Min
Typ
(Note 2)
Max
b
1 5
Units
V
V
54LS
DM74
54LS
DM74
DM74
DM74
DM74
DM74
54LS
25
27
34
34
0 25
0 35
0 25
b
0 14
b
0 18
V
OL
04
05
04
mA
mA
01
20
b
0 4
b
100
b
100
V
mA
mA
mA
mA
I
IH
I
IL
I
OS
High Level Input Current
Low Level Input Current
Short Circuit
Output Current
Supply Current with
Outputs High
Supply Current with
Outputs Low
I
CCH
I
CCL
86
12
16
21
mA
mA
Note 1
V
CC
e
5V
Note 2
All typicals are at V
CC
e
5V T
A
e
25 C
Note 3
Not more than one output should be shorted at a time and the duration should not exceed one second
2
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