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June 1989
5442A DM5442A DM7442A
BCD to Decimal Decoders
General Description
These BCD-to-decimal decoders consist of eight inverters
and ten four-input NAND gates The inverters are connect-
ed in pairs to make BCD input data available for decoding
by the NAND gates Full decoding of input logic ensures
that all outputs remain off for all invalid (10–15) input condi-
tions
Features
Y Diode clamped inputs
Y Also for application as 4-line-to-16-line decoders 3-line-
to-8-line decoders
Y All outputs are high for invalid input conditions
Y Typical power dissipation 140 mW
Y Typical propagation delay 17 ns
Y Alternate Military Aerospace device (5442A) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
TL F 6516 – 1
Order Number 5442ADMQB 5442AFMQB DM5442AJ DM5442AW or DM7442AN
See NS Package Number J16A N16E or W16A
Function Table
No BCD Input
Decimal Output
DCBA0 1 2 3 4 5 6 7 8 9
0 L L L L LHHHHHHHHH
1 L L LHHLHHHHHHHH
2 L LHLHHLHHHHHHH
3 L LHHHHHLHHHHHH
4 LHL LHHHHLHHHHH
5 LHLHHHHHHLHHHH
6 LHHLHHHHHHLHHH
7 LHHHHHHHHHHLHH
8 HL L LHHHHHHHHLH
9 HL LHHHHHHHHHHL
I HLHLHHHHHHHHHH
N HLHHHHHHHHHHHH
V HHL LHHHHHHHHHH
A HHLHHHHHHHHHHH
L HHHLHHHHHHHHHH
I HHHHHHHHHHHHHH
D
H e High Level
L e Low Level
C1995 National Semiconductor Corporation TL F 6516
RRD-B30M105 Printed in U S A

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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
5 5V
Operating Free Air Temperature Range
DM54 and 54
b55 C to a125 C
DM74
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
VCC
VIH
VIL
IOH
IOL
TA
Parameter
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
DM5442A
Min Nom
45 5
2
b55
Max
55
08
b0 8
16
125
Min
4 75
2
0
DM7442A
Nom
5
Max
5 25
08
b0 8
16
70
Units
V
V
V
mA
mA
C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
VI
VOH
VOL
II
Input Clamp Voltage
High Level Output
Voltage
Low Level Output
Voltage
Input Current Max
Input Voltage
VCC e Min II e b12 mA
VCC e Min IOH e Max
VIL e Max VIH e Min
VCC e Min IOL e Max
VIH e Min VIL e Max
VCC e Max VI e 5 5V
IIH
High Level Input Current
VCC e Max VI e 2 4V
IIL
Low Level Input Current
VCC e Max VI e 0 4V
IOS Short Circuit
Output Current
VCC e Max
(Note 2)
DM54
DM74
ICC Supply Current
VCC e Max
(Note 3)
DM54
DM74
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
Note 3 ICC is measured with all outputs open and all inputs grounded
Min
24
b20
b18
Typ
(Note 1)
34
02
28
28
Max
b1 5
04
1
40
b1 6
b55
b55
41
56
Units
V
V
V
mA
mA
mA
mA
mA
2

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Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)
Symbol
Parameter
Conditions Min Max Units
tPHL
Propagation Delay Time
CL e 15 pF
High to Low Level Output
RL e 400X
from A B C or D through
2 Levels of Logic
25 ns
tPHL
Propagation Delay Time
High to Low Level Output
from A B C or D through
3 Levels of Logic
30 ns
tPLH
Propagation Delay Time
Low to High Level Output
from A B C or D through
2 Levels of Logic
25 ns
tPLH
Propagation Delay Time
Low to High Level Output
from A B C or D through
3 Levels of Logic
30 ns
Logic Diagram
Tl F 6516 – 2
3

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4

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Physical Dimensions inches (millimeters)
16-Lead Ceramic Dual-In-Line Package (J)
Order Number 5442ADMQB or DM5442AJ
NS Package Number J16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM7442AN
NS Package Number N16E
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