TL F 10171
DM74LS40
Dual
4-Input
NAND
Buffer
February 1992
DM74LS40
Dual 4-Input NAND Buffer
General Description
This device contains two independent gates each of which
perform the logic NAND function
Connection Diagrams
Dual-In-Line Package
TL F 10171 1
Order Number DM74LS40M or DM74LS40N
See NS Package Number M14A or N14A
Function Table
(Each Gate)
Inputs
Outputs
A
B
C
D
Y
H
H
H
H
L
L
X
X
X
H
X
L
X
X
H
X
X
L
X
H
X
X
X
L
H
Logic Diagram (Each Gate)
TL F 10171 2
Positive Logic
Y
e
A
B
C
D
or
Y
e
A
a
B
a
C
a
D
C1995 National Semiconductor Corporation
RRD-B30M105 Printed in U S A
Absolute Maximum Ratings
(Note)
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
DM74LS
0 C to
a
70 C
Storage Temperature Range
b
65 C to
a
150 C
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
Recommended Operating Conditions
Symbol
Parameter
DM74LS40
Units
Min
Nom
Max
V
CC
Supply Voltage
4 75
5
5 25
V
V
IH
High Level Input Voltage
2
V
V
IL
Low Level Input Voltage
0 8
V
I
OH
High Level Output Current
b
1 2
mA
I
OL
Low Level Output Current
24
mA
T
A
Free Air Operating Temperature
0
70
C
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 1)
V
I
Input Clamp Voltage
V
CC
e
Min I
I
e b
18 mA
b
1 5
V
V
OH
High Level Output
V
CC
e
Min I
OH
e
Max
2 7
V
Voltage
V
IL
e
Max
V
OL
Low Level Output
V
CC
e
Min I
OL
e
Max
0 5
V
Voltage
V
IH
e
Min
I
OL
e
12 mA V
CC
e
Min
0 4
I
I
Input Current
Max
V
CC
e
Max V
I
e
7V
0 1
mA
Input Voltage
I
IH
High Level Input Current
V
CC
e
Max V
I
e
2 7V
20
m
A
I
IL
Low Level Input Current
V
CC
e
Max V
I
e
0 4V
b
0 4
mA
I
OS
Short Circuit
V
CC
e
Max
b
30
b
130
mA
Output Current
(Note 2)
I
CCH
Supply Current with
V
CC
e
Max V
IN
e
GND
1 0
mA
Outputs High
I
CCL
Supply Current with
V
CC
e
Max V
IN
e
OPEN
6 0
mA
Outputs Low
Note 1
All typicals are at V
CC
e
5V T
A
e
25 C
Note 2
Note more than one output should be shorted at a time and the duration should not exceed one second
2
DM74LS40
Dual
4-Input
NAND
Buffer
Physical Dimensions
inches (millimeters) (Continued)
14-Lead Molded Dual-In-Line Package (N)
Order Number DM74LS40N
NS Package Number N14A
LIFE SUPPORT POLICY
NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
2 A critical component is any component of a life
systems which (a) are intended for surgical implant
support device or system whose failure to perform can
into the body or (b) support or sustain life and whose
be reasonably expected to cause the failure of the life
failure to perform when properly used in accordance
support device or system or to affect its safety or
with instructions for use provided in the labeling can
effectiveness
be reasonably expected to result in a significant injury
to the user
National Semiconductor
National Semiconductor
National Semiconductor
National Semiconductor
Corporation
Europe
Hong Kong Ltd
Japan Ltd
1111 West Bardin Road
Fax (a49) 0-180-530 85 86
13th Floor Straight Block
Tel 81-043-299-2309
Arlington TX 76017
Email cnjwge tevm2 nsc com
Ocean Centre 5 Canton Rd
Fax 81-043-299-2408
Tel 1(800) 272-9959
Deutsch Tel (a49) 0-180-530 85 85
Tsimshatsui Kowloon
Fax 1(800) 737-7018
English
Tel (a49) 0-180-532 78 32
Hong Kong
Fran ais Tel (a49) 0-180-532 93 58
Tel (852) 2737-1600
Italiano
Tel (a49) 0-180-534 16 80
Fax (852) 2736-9960
National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications
PDF 
ZIP