Absolute Maximum Ratings (Note)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
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 acutual device operation.
Supply Voltage
Input Voltage
7V
5.5V
Operating Free Air Temperature Range
54
DM74
b
b
a
55 C to 125 C
§
0 C to 70 C
§
a
§
§
a
65 C to 150 C
Storage Temperature Range
§
§
Recommended Operating Conditions
5497
DM7497
Nom
5
Symbol
Parameter
Units
Min
4.5
2
Nom
Max
Min
4.75
2
Max
V
V
V
Supply Voltage
5
5.5
5.25
V
V
CC
High Level Input Voltage
IH
Low Level Input Voltage
0.8
0.8
V
IL
b
b
I
I
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
Setup Time LOW, CE to CP Rising
Hold Time HIGH, CE to CP Rising
Hold Time LOW, CE to CP Falling
CP Pulse Width HIGH
0.4
16
125
0.4
16
70
mA
mA
OH
OL
b
T
55
0
25
0
C
§
A
t (L)
s
25
ns
ns
ns
ns
ns
ns
t (H)
h
0
t (L)
h
0
0
t
t
t
(H)
w
(L)
w
(H)
w
20
20
15
20
CP Pulse Width LOW
MR Pulse Width HIGH
15
Electrical Characteristics Over recommended operating free air temperature range (unless otherwise noted)
Typ
Symbol
Parameter
Conditions
Min
Max
Units
(Note 1)
e
e
e b
e
b
1.5
V
V
Input Clamp Voltage
V
Min, I
Min, I
12 mA
Max,
V
V
I
CC
I
High Level Output
Voltage
V
V
OH
CC
OH
2.4
3.4
0.2
e
Max
IL
e
e
V
OL
Low Level Output
Voltage
V
V
Min, I
Max,
5.5V
2.4V
CC
OL
0.4
V
e
Min
IH
@
Input Current Max
e
e
I
I
V
CC
Max, V
Max, V
I
I
1
mA
mA
Input Voltage
e
e
e
High Level Input Current
V
CC
DM74
54
40
80
IH
I
Clock Inputs
e
b
I
I
I
Low Level Input Current
V
Max, V
0.4V
DM74
54
1.6
3.2
IL
CC
Clock Inputs
I
mA
mA
mA
b
e
CC
(Note 2)
b
b
b
b
Short Circuit
V
Max
54
20
18
55
55
OS
CC
Output Current
DM74
e
Max
Supply Current With
Outputs High
V
CC
120
2
NSC [ National Semiconductor ]
