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DM54LS260/DM74LS260
Dual 5-Input NOR Gate
General Description
This device contains two individual five input gates, each of
which perform the logic NOR function.
Connection Diagram
DM54LS260/DM74LS260 Dual 5-Input NOR Gate
April 1992
Dual-In-Line Package
Truth Table
Order Number DM54LS260J, DM54LS260W,
TL/F/9824– 1
DN54LS260E, DM74LS260M or DM74LS260N
See NS Package Number E20A, J14A, M14A, N14A or W14B
AaBaCaDaEeY
Inputs Outputs
ABCDE Y
LLLLL H
XXXXH L
XXXHX L
XXHXX L
XHXXX L
HXXX X L
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
TL/F/9824
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 7V
Operating Free Air Temperature Range
DM54LS
DM74LS 0
Storage Temperature Range
b
55§Ctoa125§C
Ctoa70§C
§
b
65§Ctoa150§C
The ‘‘Absolute Maximum Ratings’’ are those values
Note:
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
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
High Level Input Voltage 2 2 V
Low Level Input Voltage 0.7 0.8 V
High Level Output Current
Low Level Output Current 4 8 mA
Free Air Operating Temperature
DM54LS260 DM74LS260
Min Nom Max Min Nom Max
b
0.4
b
55 125 0 70
b
0.4 mA
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Min
e
V
I
V
OH
V
OL
I
I
I
IH
I
IL
Input Clamp Voltage V
High Level Output V
Voltage V
Low Level Output V
Voltage V
Input Current@Max V
Input Voltage V
High Level Input Current V
Low Level Input Current V
CC
CC
e
IL
CC
e
IH
e
I
OL
CC
CC
CC
Min, I
e
Min, I
Max
e
Min, I
Min
4 mA, V
e
Max, V
e
Max, V
e
Max, V
eb
18 mA
I
e
Max DM54 2.5
OH
DM74 2.7
e
Max DM54 0.4
OL
DM74 0.5 V
e
Min DM74 0.4
CC
e
7V
I
e
10V DM54
I
e
2.7V 20 mA
I
e
0.4V DM54
I
DM74
I
OS
I
CCH
I
CCL
Note 1: All typicals are at V
Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Short Circuit V
Output Current (Note 2)
Supply Current with Outputs High V
Supply Current with Outputs Low V
e
e
5V, T
CC
25§C.
A
e
Max DM54
CC
CC
CC
e
e
Max, V
Max, V
e
GND 4.0 mA
IN
e
Open 5.5 mA
IN
DM74
b
b
Typ
(Note 1)
Max Units
b
1.5 V
0.1 mA
b
0.40
b
0.36
20
20
b
100
b
100
Units
C
§
mA
mA
V
Switching Characteristics V
Symbol Parameter
t
t
PLH
PHL
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
CC
ea
5V, T
A
ea
2
25§C
e
2kX,C
R
L
Min Max
e
15 pF
L
10 ns
12 ns
Units