DM74145 [NSC]
BCD to Decimal Decoders/Drivers; BCD至十进制解码器/驱动器
| 型号： | DM74145 |
| 厂家： | 
National Semiconductor |
| 描述： | BCD to Decimal Decoders/Drivers |
| 文件： | 总4页 (文件大小：114K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
June 1989
DM54145/DM74145
BCD to Decimal Decoders/Drivers
General Description
Features
Y
Y
Y
Full decoding of input logic
These BCD-to-decimal decoders/drivers consist of eight in-
verters 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 driv-
ers. The high-breakdown output transistors are compatible
for interfacing with most MOS integrated circuits.
80 mA sink-current capability
All outputs are off for invalid BCD input conditions
Connection Diagram
Function Table
Dual-In-Line Package
Inputs
No.
Outputs
D
C
B
A
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
L
H
H
H
H
H
L
H
H
L
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
L
H
H
H
H
L
H
H
H
5
6
7
8
9
L
L
H
H
H
L
L
H
H
L
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
L
H
H
H
H
H
L
H
H
L
H
H
H
L
H
H
H
H
L
L
H
L
H
H
H
H
H
H
H
L
L
H
H
I
H
H
H
H
H
H
L
L
H
H
L
L
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
H
H
H
H
H
N
V
A
L
I
H
H
H
H
L
H
L
H
H
TL/F/6544–1
Order Number DM54145J, DM54145W or DM74145N
See NS Package Number J16A, N16E or W16A
H
D
e
e
Low Level (On)
H
High Level (Off), L
C
1995 National Semiconductor Corporation
TL/F/6544
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.
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.
Supply Voltage
Input Voltage
7V
5.5V
Operating Free Air Temperature Range
DM54
DM74
b
b
a
55 C to 125 C
§
0 C to 70 C
§
a
§
§
a
65 C to 150 C
Storage Temperature Range
§
§
Recommended Operating Conditions
DM54145
DM74145
Symbol
Parameter
Units
Min
4.5
2
Nom
Max
Min
4.75
2
Nom
Max
V
V
V
V
Supply Voltage
5
5.5
5
5.25
V
V
CC
High Level Input Voltage
Low Level Input Voltage
IH
0.8
15
0.8
15
20
70
V
IL
High Level Output Voltage
Low Level Output Current
Free Air Operating Temperature
V
OH
I
20
mA
OL
b
T
A
55
125
0
C
§
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Typ
Symbol
Parameter
Conditions
e b
Min
Max
Units
V
(Note 1)
e
e
b
1.5
V
I
Input Clamp Voltage
V
Min, I
I
12 mA
CC
e
Max
I
High Level Output
Current
V
V
Min, V
OH
CEX
CC
250
0.4
0.9
mA
e
e
Min
Max, V
IL
IH
e
e
e
Max
V
OL
Low Level Output
Voltage
V
V
Min, I
CC
OL
e
Min, V
Max
IH
IL
V
e
e
I
80 mA
OL
0.5
V
Min
CC
@
Input Current Max
e
e
I
I
V
Max, V
5.5V
CC
I
1
mA
Input Voltage
e
e
e
e
e
I
I
I
High Level Input Current
Low Level Input Current
Supply Current
V
V
V
Max, V
Max, V
Max
2.4V
0.4V
40
mA
IH
CC
CC
CC
I
b
1.6
62
70
mA
IL
I
DM54
DM74
43
43
CC
mA
(Note 2)
e
e
25 C (See Section 1 for Test Waveforms and Output Load)
Switching Characteristics at V
5V and T
§
CC
A
Symbol
Parameter
Conditions
Min
Max
Units
e
e
t
t
Propagation Delay Time
C
15 pF
PLH
L
30
ns
Low to High Level Output
R
100X
L
Propagation Delay Time
High to Low Level Output
PHL
30
ns
e
e
25 C.
Note 1: All typicals are at V
5V, T
§
is measured with all outputs open and all inputs grounded.
CC
A
Note 2: I
CC
2
Logic Diagram
TL/F/6544–2
Physical Dimensions inches (millimeters)
16-Lead Ceramic Dual-In-Line Package (J)
Order Number DM54145J
NS Package Number J16A
3
Physical Dimensions inches (millimeters) (Continued)
16-Lead Molded Dual-In-Line Package (N)
Order Number DM74145N
NS Package Number N16E
16-Lead Ceramic Flat Package (W)
Order Number DM54145W
NS Package Number W16A
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