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 5.5V
Operating Free Air Temperature Range
DM54 and 54
b
55§Ctoa125§C
DM74 0
§
Ctoa70§C
Storage Temperature Range
b
65§Ctoa150§C
Note:
The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaranteed. 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
DM5474 DM7474
Units
Min Nom Max Min Nom Max
V
CC
Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
V
IH
High Level Input Voltage 2 2 V
V
IL
Low Level Input Voltage 0.8 0.8 V
I
OH
High Level Output Current
b
0.4
b
0.4 mA
I
OL
Low Level Output Current 16 16 mA
f
CLK
Clock Frequency (Note 2) 0 15 0 15 MHz
t
W
Pulse Width Clock High 30 30
(Note 2)
Clock Low 37 37
ns
Clear Low 30 30
Preset Low 30 30
t
SU
Input Setup Time (Notes1&2) 20
u
20
u
ns
t
H
Input Hold Time (Notes1&2) 5
u
5
u
ns
T
A
Free Air Operating Temperature
b
55 125 0 70
§
C
Note 1: The symbol (u) indicates the rising edge of the clock pulse is used for reference.
Note 2: T
A
e
25§C and V
CC
e
5V.
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Min
Typ
Max Units
(Note 3)
V
I
Input Clamp Voltage V
CC
e
Min, I
I
eb
12 mA
b
1.5 V
V
OH
High Level Output V
CC
e
Min, I
OH
e
Max
2.4 3.4 V
Voltage V
IL
e
Max, V
IH
e
Min
V
OL
Low Level Output V
CC
e
Min, I
OL
e
Max
0.2 0.4 V
Voltage V
IH
e
Min, V
IL
e
Max
I
I
Input Current@Max V
CC
e
Max, V
I
e
5.5V
1mA
Input Voltage
I
IH
High Level Input V
CC
e
Max D 40
Current V
I
e
2.4V
Clock 80
mA
Clear 120
Preset 40
I
IL
Low Level Input V
CC
e
Max D
b
1.6
Current V
I
e
0.4V
Clock
b
3.2
mA
(Note 6)
Clear
b
3.2
Preset
b
1.6
I
OS
Short Circuit V
CC
e
Max DM54
b
20
b
55
mA
Output Current (Note 4)
DM74
b
18
b
55
I
CC
Supply Current V
CC
e
Max (Note 5) 17 30 mA
Note 3: All typicals are at V
CC
e
5V, T
A
e
25§C.
Note 4: Not more than one output should be shorted at a time.
Note 5: With all outputs open, I
CC
is measured with the Q and Q outputs high in turn. At the time of measurement the clock is grounded.
Note 6: Clear is tested with preset high and preset is tested with clear high.
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