TL F 10187
DM54LS447DM74LS447
BCD
to
7-Segment
DecoderDriver
with
Open-Collector
Outputs
May 1992
DM54LS447 DM74LS447
BCD to 7-Segment Decoder Driver
with Open-Collector Outputs
General Description
The 'LS447 is the same as the 'LS247 except that the Out-
put OFF Voltage V
OH
is specified as 7 0V rather than 15V
with the same I
OH
limit of 250 mA For all other information
please refer to the 'LS247 data sheet
Connection Diagram
Dual-In-Line Package
TL F 10187 1
Order Number DM54LS447J DM54LS447W DM74LS447M or DM74LS447N
See NS Package Number J16A M16A N16E or W16A
C1995 National Semiconductor Corporation
RRD-B30M105 Printed in U S A
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
b
55 C to
a
125 C
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
DM54LS447
DM74LS447
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 7
0 8
V
I
OH
High Level Output Current (BI RBO)
b
50
b
50
m
A
I
OL
Low Level Output Current
12
24
mA
T
A
Free Air Operating Temperature
b
55
125
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
DM54
2 4
V
Voltage
V
IL
e
Max (BI RBO)
DM74
2 4
3 4
I
OFF
High Level Output Current
Segment Outputs V
O
e
7 0V (a g)
250
m
A
V
OL
Low Level Output
V
CC
Min I
OL
e
Max
DM54
0 4
Voltage
V
IH
e
Min
DM74
0 35
0 5
V
I
OL
e
12 mA V
CC
e
Min
DM74
0 25
0 4
I
I
Input Current
Max
V
CC
e
Max V
I
e
7V
0 1
mA
Input Voltage
V
I
e
10V (DM54)
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
Others
b
0 4
mA
BI RBO Inputs
b
1 2
mA
I
OS
Short Circuit
V
CC
e
Max
DM54
b
0 3
b
2 0
mA
Output Current
(Note 2)
DM74
b
0 3
b
2 0
I
CC
Supply Current
V
CC
e
Max
13
mA
Note 1
All typicals are at V
CC
e
5V T
A
e
25 C
Note 2
Not more than one output should be shorted at a time and the duration should not exceed one second
Switching Characteristics
at V
CC
e
5V T
A
e
25 C
Symbol
Parameter
R
L
e
2 kX C
L
e
15 pF
Units
Min
Max
t
PLH
Propagation Delay
100
ns
t
PHL
100
2
Physical Dimensions
inches (millimeters) (Continued)
16-Lead Small Outline Molded Package (M)
Order Number DM74LS447M
NS Package Number M16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM74LS447N
NS Package Number N16E
5
PDF 
ZIP
