DM74145N [FAIRCHILD]
BCD to Decimal Decoders/Drivers; BCD至十进制解码器/驱动器
| 型号： | DM74145N |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | BCD to Decimal Decoders/Drivers |
| 文件： | 总4页 (文件大小：44K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
September 1986
Revised February 2000
DM74145
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 com-
patible for interfacing with most MOS integrated circuits.
■ Full decoding of input logic
■ 80 mA sink-current capability
■ All outputs are OFF for invalid BCD input conditions
Ordering Code:
Order Number Package Number
Package Description
DM74145N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Connection Diagram
Function Table
No.
Inputs
Outputs
D
L
C
L
B
L
A
L
0
L
1
H
L
2
H
H
L
3
H
H
H
L
4
H
H
H
H
L
5
H
H
H
H
H
L
6
H
H
H
H
H
H
L
7
H
H
H
H
H
H
H
L
8
H
H
H
H
H
H
H
H
L
9
H
H
H
H
H
H
H
H
H
L
0
1
2
3
4
5
6
7
8
9
I
L
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
L
H
H
H
H
H
H
H
H
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
L
H
L
H
H
H
H
H
H
H
L
H
H
L
H
H
H
H
H
H
N
V
A
L
I
L
H
L
H
H
H
H
L
H
L
H
H
H
D
H = HIGH Level (OFF)
L = LOW Level (ON)
© 2000 Fairchild Semiconductor Corporation
DS006544
www.fairchildsemi.com
Logic Diagram
www.fairchildsemi.com
2
Absolute Maximum Ratings(Note 1)
Note 1: 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 tables 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
Storage Temperature Range
0°C to +70°C
−65°C to +150°C
Recommended Operating Conditions
Symbol
VCC
Parameter
Supply Voltage
Min
4.75
2
Nom
Max
Units
V
5
5.25
VIH
VIL
VOH
IOL
TA
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Voltage
LOW Level Output Current
Free Air Operating Temperature
V
0.8
15
20
70
V
V
mA
°C
0
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions
Input Clamp Voltage = Min, I = −12 mA
Typ
Min
Max
−1.5
250
Units
(Note 2)
V
V
V
V
V
V
V
I
CC
CC
I
I
HIGH Level
= Min, V = Max
OH
CEX
µA
Output Current
LOW Level
= Max, V = Min
IH
IL
V
= Min, I = Max
OL
OL
CC
0.4
0.9
Output Voltage
= Min, V = Max
IH
IL
V
I
= 80 mA
OL
0.5
43
V
V
V
V
V
= Min
CC
CC
CC
CC
CC
I
I
I
I
Input Current @ Max Input Voltage
HIGH Level Input Current
LOW Level Input Current
Supply Current
= Max, V = 5.5V
1
40
mA
µA
I
I
= Max, V = 2.4V
IH
IL
I
= Max, V = 0.4V
−1.6
70
mA
mA
I
= Max (Note 3)
CC
Note 2: All typicals are at V = 5V, T = 25°C.
CC
A
Note 3: I is measured with all outputs open and all inputs grounded.
CC
Switching Characteristics
at VCC = 5V and T = 25°C
A
Symbol
Parameter
Propagation Delay Time
Conditions
Min
Max
Units
t
C
R
= 15 pF
= 100Ω
PLH
L
30
30
ns
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
L
t
PHL
ns
3
www.fairchildsemi.com
Physical Dimensions inches (millimeters) unless otherwise noted
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N16E
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
www.fairchildsemi.com
4
相关型号：
©2020 ICPDF网 联系我们和版权申明