NSC DM7445N

DM5445/DM7445 BCD to Decimal Decoders/Drivers
General Description
Features
These BCD-to-decimal decoders/drivers consist of eight inverters and ten, four-input NAND gates. The inverters are
connected in pairs to make BCD input data available for
decoding by the NAND gates. Full decoding of BCD input
logic ensures that all outputs remain off for all invalid
(10 – 15) binary input conditions. These decoders feature
high-performance, NPN output transistors designed for use
as indicator/relay drivers, or as open-collector logic-circuit
drivers. The high-breakdown output transistors are compatible for interfacing with most MOS integrated circuits.
Y
Connection Diagram
Function Table
Y
Y
Full decoding of input logic
80 mA sink-current capability
All outputs are off for invalid BCD input conditions
Inputs
No.
Dual-In-Line Package
TL/F/6517 – 1
Order Number DM5445J, DM5445W or DM7445N
See NS Package Number J16A, N16E or W16A
Outputs
D
C
B
A
0
1
2
3
0
1
2
3
4
L
L
L
L
L
L
L
L
L
H
L
L
H
H
L
L
H
L
H
L
L
H
H
H
H
H
L
H
H
H
H H H H H H H H
H H H H H H H H
L H H H H H H H
H L H H H H H H
H H L H H H H H
4
5
5
6
7
8
9
L
L
L
H
H
H
H
H
L
L
L
H
H
L
L
H
L
H
L
H
H H
H H
H H
H H
H H
I
N
V
A
L
I
D
H
H
H
H
H
H
L H L H
L H H H
H L L H
H L H H
H H L H
H H H H
H H H L
H H H H
H H H H
H H H H
H H H H
6
7
8
9
H H H H
L H H H
H L H H
H H L H
H H H L
H H H H H H H H H
H H H H H H H H H
H H H H H H H H H
H H H H H H H H H
H H H H H H H H H
H H H H H H H H H
H e High Level (Off), L e Low Level (On)
C1995 National Semiconductor Corporation
TL/F/6517
RRD-B30M105/Printed in U. S. A.
DM5445/DM7445 BCD to Decimal Decoders/Drivers
June 1989
Absolute Maximum Ratings (Note)
Note: 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.
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
Output Voltage
30V
Operating Free Air Temperature Range
b 55§ C to a 125§ C
DM54
DM74
0§ C to a 70§ C
b 65§ C to a 150§ C
Storage Temperature Range
Recommended Operating Conditions
Symbol
DM5445
Parameter
DM7445
Units
Min
Nom
Max
Min
Nom
Max
4.5
5
5.5
4.75
5
5.25
VCC
Supply Voltage
VIH
High Level Input Voltage
VIL
Low Level Input Voltage
0.8
0.8
VOH
High Level Output Voltage
30
30
V
IOL
Low Level Output Current
20
20
mA
TA
Free Air Operating Temperature
70
§C
2
V
2
b 55
125
V
0
V
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Typ
(Note 1)
Min
Max
Units
b 1.5
V
250
mA
VI
Input Clamp Voltage
VCC e Min, II e b12 mA
ICEX
High Level Output
Current
VCC e Min, VO e 30V
VIL e Max, VIH e Min
VOL
Low Level Output
Voltage
VCC e Min, IOL e Max
VIH e Min, VIL e Max
0.2
0.4
IOL e 80 mA
VCC e Min
0.5
0.9
II
Input Current @ Max
Input Voltage
VCC e Max, VI e 5.5V
IIH
High Level Input Current
IIL
ICC
1
mA
VCC e Max, VI e 2.4V
40
mA
Low Level Input Current
VCC e Max, VI e 0.4V
b 1.6
mA
Supply Current
VCC e Max
(Note 2)
Switching Characteristics
Symbol
V
DM54
43
62
DM74
43
70
mA
at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load)
Parameter
Conditions
tPLH
Propagation Delay Time
Low to High Level Output
CL e 15 pF
RL e 100X
tPHL
Propagation Delay Time
High to Low Level Output
Note 1: All typicals are at VCC e 5V, TA e 25§ C.
Note 2: ICC is measured with all inputs grounded and all outputs open.
2
Min
Max
Units
49.5
ns
49.5
ns
Logic Diagram
TL/F/6517 – 2
Physical Dimensions inches (millimeters)
16-Lead Ceramic Dual-In-Line Package (J)
Order Number DM5445J
NS Package Number J16A
3
DM5445/DM7445 BCD to Decimal Decoders/Drivers
Physical Dimensions inches (millimeters) (Continued)
16-Lead Molded Dual-In-Line Package (N)
Order Number DM7445N
NS Package Number N16E
LIFE SUPPORT POLICY
16-Lead Ceramic Flat Package (W)
Order Number DM5445W
NS Package Number W16A
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