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74LS47 参数 Datasheet PDF下载

74LS47图片预览
型号: 74LS47
PDF下载: 下载PDF文件 查看货源
内容描述: BCD到7段解码器/驱动器,集电极开路输出 [BCD to 7-Segment Decoder/Driver with Open-Collector Outputs]
分类和应用: 解码器驱动器
文件页数/大小: 6 页 / 70 K
品牌: FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
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DM74LS47
Absolute Maximum Ratings
(Note 6)
Supply Voltage
Input Voltage
Operating Free Air Temperature Range
Storage Temperature Range
7V
7V
0°C to
+70°C
−65°C
to
+150°C
Note 6:
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.
Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
I
OH
I
OH
I
OL
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
a
g @ 15V
=
V
OH
(Note 7)
HIGH Level Output Current BI /RBO
LOW Level Output Current
Free Air Operating Temperature
0
Parameter
Min
4.75
2
0.8
−250
−50
24
70
Nom
5
Max
5.25
Units
V
V
V
µA
µA
mA
°C
Note 7:
OFF-State at a–g.
Electrical Characteristics
Over recommended operating free air temperature range (unless otherwise noted)
Symbol
V
I
V
OH
I
OFF
V
OL
Parameter
Input Clamp Voltage
HIGH Level
Output Voltage
Output HIGH Current Segment Outputs
LOW Level
Output Voltage
Conditions
V
CC
=
Min, I
I
= −18
mA
V
CC
=
Min, I
OH
=
Max,
V
IL
=
Max, BI /RBO
V
CC
=
5.5V, V
O
=
15V a
g
V
CC
=
Min, I
OL
=
Max,
V
IH
=
Min, a
g
I
OL
=
3.2 mA, BI /RBO
I
OL
=
12 mA, a –g
I
OL
=
1.6 mA, BI /RBO
I
I
I
IH
I
IL
I
OS
I
CC
Input Current @ Max
Input Voltage
HIGH Level Input Current
LOW Level Input Current
Short Circuit
Output Current
Supply Current
Note 8:
All typicals are at V
CC
=
5V, T
A
=
25°C.
Note 9:
Not more than one output should be shorted at a time, and the duration should not exceed one second.
Min
Typ
(Note 8)
Max
−1.5
Units
V
V
2.7
3.4
250
0.35
0.5
0.5
0.25
0.4
0.4
100
20
−0.4
µA
V
V
CC
=
Max, V
I
=
7V
V
CC
=
Max, V
I
=
10V
V
CC
=
Max, V
I
=
2.7V
V
CC
=
Max, V
I
=
0.4V
V
CC
=
Max (Note 9),
I
OS
at BI/RBO
V
CC
=
Max
−0.3
µA
µA
mA
mA
mA
−2.0
13
Switching Characteristics
at V
CC
= +
5.0V, T
A
= +25°C
R
L
=
665Ω
Symbol
Parameter
Conditions
Min
t
PLH
t
PHL
t
PLH
t
PHL
Propagation Delay
An to a –g
Propagation Delay
RBI to a –g (Note 10)
C
L
=
15 pF
Max
100
100
100
100
ns
ns
Units
Note 10:
LT
=
HIGH, A0–A3
=
LOW
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