National Products Inverter Benutzerhandbuch
Absolute Maximum Ratings
(Note)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
54LS
b
55
§
C to
a
125
§
C
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.
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
Parameter
54LS14
DM74LS14
Units
Min
Nom
Max
Min
Nom
Max
V
CC
Supply Voltage
4.5
5
5.5
4.75
5
5.25
V
V
T
a
Positive-Going Input
1.5
1.6
2.0
1.4
1.6
1.9
V
Threshold Voltage (Note 1)
V
T
b
Negative-Going Input
0.6
0.8
1.1
0.5
0.8
1
V
Threshold Voltage (Note 1)
HYS
Input Hysteresis (Note 1)
0.4
0.8
0.4
0.8
V
I
OH
High Level Output Current
b
0.4
b
0.4
mA
I
OL
Low Level Output Current
4
8
mA
T
A
Free Air Operating Temperature
b
55
125
0
70
§
C
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 2)
V
I
Input Clamp Voltage
V
CC
e
Min, I
I
e b
18 mA
b
1.5
V
V
OH
High Level Output
V
CC
e
Min, I
OH
e
Max
54LS
2.5
3.4
V
Voltage
V
IL
e
Max
DM74
2.7
3.4
V
OL
Low Level Output
V
CC
e
Min, I
OL
e
Max
54LS
0.25
0.4
Voltage
V
IH
e
Min
DM74
0.35
0.5
V
V
CC
e
Min, I
OL
e
4 mA
DM74
0.25
0.4
I
T
a
Input Current at
V
CC
e
5V, V
I
e
V
T
a
DM74
b
0.14
mA
Positive-Going Threshold
I
T
b
Input Current at
V
CC
e
5V, V
I
e
V
T
b
DM74
b
0.18
mA
Negative-Going Threshold
I
I
Input Current
@
Max
V
CC
e
Max, V
I
e
7V
DM74
0.1
mA
Input Voltage
V
CC
e
Max, V
I
e
10.0V
54LS
I
IH
High Level Input Current
V
CC
e
Max, V
I
e
2.7V
20
m
A
I
IL
Low Level Input Current
V
CC
e
Max, V
I
e
0.4V
b
0.4
mA
I
OS
Short Circuit
V
CC
e
Max
54LS
b
20
b
100
mA
Output Current
(Note 3)
DM74
b
20
b
100
I
CCH
Supply Current with
V
CC
e
Max
8.6
16
mA
Outputs High
I
CCL
Supply Current with
V
CC
e
Max
12
21
mA
Outputs Low
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