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National Semiconductor Electronic Components Datasheet

DM74LS447 Datasheet

BCD to 7-Segment Decoder/Driver

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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 VOH is specified as 7 0V rather than 15V
with the same IOH limit of 250 mA For all other information
please refer to the ’LS247 data sheet
Connection Diagram
Dual-In-Line Package
May 1992
TL F 10187 – 1
Order Number DM54LS447J DM54LS447W DM74LS447M or DM74LS447N
See NS Package Number J16A M16A N16E or W16A
C1995 National Semiconductor Corporation TL F 10187
RRD-B30M105 Printed in U S A


National Semiconductor Electronic Components Datasheet

DM74LS447 Datasheet

BCD to 7-Segment Decoder/Driver

No Preview Available !

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
b55 C to a125 C
DM74LS
0 C to a70 C
Storage Temperature Range
b65 C to a150 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
VCC Supply Voltage
VIH High Level Input Voltage
VIL Low Level Input Voltage
IOH High Level Output Current (BI RBO)
IOL Low Level Output Current
TA Free Air Operating Temperature
DM54LS447
Min Nom Max
45 5 55
2
07
b50
12
b55
125
DM74LS447
Min Nom Max
4 75 5 5 25
2
08
b50
24
0 70
Units
V
V
V
mA
mA
C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
VI Input Clamp Voltage
VOH
High Level Output
Voltage
VCC e Min II e b18 mA
VCC e Min IOH e Max
VIL e Max (BI RBO)
DM54
DM74
24
24
IOFF
VOL
High Level Output Current
Low Level Output
Voltage
Segment Outputs VO e 7 0V (a – g)
VCC Min IOL e Max
VIH e Min
DM54
DM74
IOL e 12 mA VCC e Min DM74
II
Input Current Max
VCC e Max VI e 7V
Input Voltage
VI e 10V (DM54)
IIH
High Level Input Current
VCC e Max VI e 2 7V
IIL
Low Level Input Current
VCC e Max VI e 0 4V
Others
BI RBO Inputs
IOS Short Circuit
Output Current
VCC e Max
(Note 2)
DM54
DM74
b0 3
b0 3
ICC Supply Current
VCC e Max
Note 1 All typicals are at VCC e 5V TA e 25 C
Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second
Typ
(Note 1)
34
0 35
0 25
Max
b1 5
250
04
05
04
01
20
b0 4
b1 2
b2 0
b2 0
13
Units
V
V
mA
V
mA
mA
mA
mA
mA
mA
Switching Characteristics at VCC e 5V TA e 25 C
Symbol
Parameter
RL e 2 kX CL e 15 pF
Min Max
tPLH
tPHL
Propagation Delay
100
100
Units
ns
2


Part Number DM74LS447
Description BCD to 7-Segment Decoder/Driver
Maker National Semiconductor
Total Page 6 Pages
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