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 actual device operation.
Supply Voltage
Input Voltage
7V
5.5V
Operating Free Air Temperature Range
DM54 and 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
DM5474
DM7474
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
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Clock Frequency (Note 2)
IH
0.8
0.8
V
IL
b
0.4
16
b
I
I
0.4
16
15
mA
mA
MHz
OH
OL
f
0
15
0
CLK
W
t
Pulse Width
(Note 2)
Clock High
30
37
30
30
30
37
30
30
Clock Low
Clear Low
Preset Low
ns
t
t
Input Setup Time (Notes 1 & 2)
Input Hold Time (Notes 1 & 2)
Free Air Operating Temperature
20
20
ns
ns
u
u
SU
5
5
u
u
H
b
T
55
125
0
70
C
§
A
Note 1: The symbol ( ) indicates the rising edge of the clock pulse is used for reference.
u
25 C and V
e
e
5V.
Note 2: T
§
A
CC
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Typ
(Note 3)
Symbol
Parameter
Conditions
Min
Max
Units
e
e
e b
e
b
1.5
V
V
Input Clamp Voltage
V
Min, I
Min, I
12 mA
V
V
I
CC
I
High Level Output
Voltage
V
V
Max
Min
OH
CC
OH
2.4
3.4
0.2
e
e
Max, V
IL
IH
e
e
V
OL
Low Level Output
Voltage
V
CC
V
IH
Min, I
OL
Min, V
Max
Max
0.4
V
e
e
IL
@
Input Current Max
Input Voltage
e
e
I
I
I
V
Max, V
5.5V
I
CC
1
mA
e
2.4V
High Level Input
Current
V
V
Max
D
40
80
IH
IL
CC
e
I
Clock
mA
Clear
Preset
D
120
40
e
0.4V
b
I
Low Level Input
Current
V
V
Max
1.6
3.2
3.2
1.6
CC
e
I
b
b
b
Clock
Clear
Preset
DM54
DM74
mA
(Note 6)
e
V
CC
(Note 4)
b
b
b
b
I
I
Short Circuit
Output Current
Max
20
18
55
55
OS
CC
mA
mA
e
Supply Current
V
CC
Max (Note 5)
17
30
e
e
25 C.
Note 3: All typicals are at V
5V, T
§
CC
Note 4: Not more than one output should be shorted at a time.
Note 5: With all outputs open, I is measured with the Q and Q outputs high in turn. At the time of measurement the clock is grounded.
A
CC
Note 6: Clear is tested with preset high and preset is tested with clear high.
2
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