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
Input Voltage
7V
5 5V
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
54A
DM74
0 C to
a
70 C
Storage Temperature Range
b
65 C to
a
150 C
Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
f
CLK
t
W
t
SU
t
EN
t
H
t
IN
T
A
Parameter
Min
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Clock Frequency (Note 4)
Clock Pulse Width (Note 4)
Data Setup Time (Note 4)
Time to Enable
Clock (Note 4)
Clock 1
Clock 2
0
15
20
20
15
0
10
b
55
b
10
5495A
Nom
5
Max
55
08
b
0 8
DM7495
Min
4 75
2
08
b
0 8
Units
Max
5 25
V
V
V
mA
mA
MHz
ns
ns
ns
Nom
5
45
2
16
25
11
10
0
15
20
20
15
0
10
125
0
b
10
16
25
10
Data Hold Time (Note 4)
Time to Inhibit Clock 1
or Clock 2 (Note 4)
Free Air Operating
Temperature
ns
ns
70
C
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
V
I
V
OH
V
OL
I
I
I
IH
I
IL
I
OS
I
CC
Parameter
Input Clamp Voltage
High Level Output
Voltage
Low Level Output
Voltage
Input Current
Input Voltage
Max
Conditions
V
CC
e
Min I
I
e b
12 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
IH
e
Min V
IL
e
Max
V
CC
e
Max V
I
e
5 5V
V
CC
e
Max
V
I
e
2 4V
V
CC
e
Max
V
I
e
0 4V
V
CC
e
Max
(Note 2)
V
CC
e
Max (Note 3)
Mode
Others
Mode
Others
DM54
DM74
b
18
b
18
Min
Typ
(Note 1)
Max
b
1 5
Units
V
V
24
34
02
04
1
80
40
b
3 2
b
1 6
b
57
b
57
V
mA
mA
High Level Input
Current
Low Level Input
Current
Short Circuit
Output Current
Supply Current
mA
mA
mA
50
75
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
Note 3
I
CC
is measured with all outputs and serial input open A B C and D inputs grounded Mode Control at 4 5V and a momentary 3V then ground applied to
both clock inputs
Note 4
T
A
e
25 C and V
CC
e
5V
2
NSC [ NATIONAL SEMICONDUCTOR ]
