National Semiconductor DM7439 Technical data
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DM7439 Quad 2-Input NAND Buffer
with Open-Collector Output
General Description
This device contains four independent gates with two data
inputs, each which performs the logic NAND function.
Connection Diagram
DM7439 Quad 2-Input NAND Buffer with Open-Collector Output
August 1989
Dual-In-Line Package
Order Number DM7439N
See NS Package Number N14A
TL/F/9776– 1
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
TL/F/9776
Absolute Maximum Ratings (Note)
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
DM74 0
Storage Temperature Range
Ctoa70§C
§
b
65§Ctoa150§C
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
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage 4.75 5 5.25 V
High Level Input Voltage 2 V
Low Level Input Voltage 0.8 V
High Level Output Current
Low Level Output Current 48 mA
Free Air Operating Temperature 0 70
Min Nom Max
DM7439
b
0.25 mA
Units
C
§
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Min
e
V
V
V
I
I
I
IH
I
IL
I
OS
I
CCH
I
CCL
I
OH
OL
Input Clamp Voltage V
High Level Output Voltage V
Low Level Output Voltage V
Input Current@Max V
Input Voltage
High Level Input Current V
Low Level Input Current V
Short Circuit V
Output Current
Supply Current with V
Outputs High
Supply Current with V
Outputs Low
CC
CC
e
V
IL
CC
e
V
IH
CC
CC
CC
CC
CC
CC
Min, I
e
Min, I
Max
e
Min I
2.0V I
e
Max, V
e
Max, V
e
Max, V
e
Max (Note 2)
e
Max
e
Max
eb
12 mA
I
e
250 mA
OH
e
48 mA 0.2 0.4
OL
e
60 mA 0.5 V
OL
e
I
80 mA 0.6
OL
e
5.5V
I
e
2.4V 40 mA
I
e
0.4V
I
2.4 3.4 V
b
18
Typ
(Note 1)
Max Units
b
1.5 V
1mA
b
1.6 mA
b
57 mA
8.5 mA
54 mA
Switching Characteristics at V
CC
e
5V and T
e
25§C (See Section 1 for Test Waveforms and Output Load)
A
Symbol Parameter Conditions Min Max Units
t
PLH
t
PHL
Note 1: All typicals are at V
Note 2: Not more than one output should be shorted at a time.
Propagation Delay Time C
Low to High Level Output R
Propagation Delay Time
High to Low Level Output
e
e
5V, T
CC
25§C.
A
e
15 pF
L
e
400X
L
22 ns
18 ns
2
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