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
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
DM54121
DM74121
Symbol
Parameter
Units
Min
Nom
Max
Min
Nom
Max
V
V
Supply Voltage
Positive-Going Input Threshold
4.5
5
5.5
4.75
5
5.25
V
V
CC
a
b
a
b
T
T
T
T
1.4
1.4
1.5
1.3
2
1.4
1.4
1.5
1.3
2
e
Voltage at the A Input (V
Min)
CC
V
V
V
Negative-Going Input Threshold
e
0.8
0.8
40
0.8
0.8
40
V
V
V
Voltage at the A Input (V
Min)
CC
Positive-Going Input Threshold
e
2
2
Voltage at the B Input (V
Min)
CC
Negative-Going Input Threshold
e
Voltage at the B Input (V
CC
Min)
b
b
I
I
High Level Output Current
Low Level Output Current
Input Pulse Width (Note 1)
0.4
0.4
mA
mA
ns
OH
OL
16
16
t
W
Rate of Rise or Fall of
Schmidt Input (B) (Note 1)
dV/dt
dV/dt
1
1
1
1
V/s
Rate of Rise or Fall of
Logic Input (A) (Note 1)
V/ms
R
C
External Timing Resistor (Note 1)
1.4
0
30
1000
67
1.4
0
40
1000
67
kX
mF
EXT
External Timing Capacitance (Note 1)
EXT
e
e
DC
Duty Cycle (Note 1)
R
2 kX
T
T
%
R
R
(Max)
90
90
EXT
b
T
A
Free Air Operating Temperature
55
125
0
70
C
§
e
e
5V.
Note 1:
T
25 C and V
§
A
CC
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Typ
(Note 1)
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
mA
e
2.4V
High Level Input
Current
V
V
Max
A1, A2
B
40
80
IH
CC
e
I
e
0.4V
b
I
I
I
Low Level Input
Current
V
V
Max
A1, A2
B
1.6
3.2
IL
CC
mA
mA
mA
e
I
b
e
(Note 2)
b
b
b
b
Short Circuit
Output Current
V
CC
Max
DM54
DM74
Quiescent
Triggered
20
18
55
55
OS
CC
e
Supply Current
V
CC
Max
13
23
25
40
e
e
25 C.
Note 1: All typicals are at V
5V, T
§
Note 2: Not more than one output should be shorted at a time.
CC
A
2