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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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Absolute Maximum Ratings(Note 6)  
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.  
Supply Voltage  
Input Voltage  
7V  
7V  
Operating Free Air Temperature Range  
Storage Temperature Range  
0°C to +70°C  
65°C to +150°C  
Recommended Operating Conditions  
Symbol  
Parameter  
Min  
4.75  
2
Nom  
Max  
Units  
VCC  
VIH  
VIL  
Supply Voltage  
5
5.25  
V
V
V
HIGH Level Input Voltage  
LOW Level Input Voltage  
HIGH Level Output Current  
a g @ 15V = VOH (Note 7)  
0.8  
IOH  
250  
µA  
IOH  
IOL  
TA  
HIGH Level Output Current BI /RBO  
LOW Level Output Current  
50  
24  
µA  
mA  
°C  
Free Air Operating Temperature  
0
70  
Note 7: OFF-State at a–g.  
Electrical Characteristics  
Over recommended operating free air temperature range (unless otherwise noted)  
Typ  
Symbol  
Parameter  
Conditions  
= Min, I = −18 mA  
Min  
Max  
Units  
(Note 8)  
V
V
Input Clamp Voltage  
V
V
V
1.5  
V
V
I
CC  
I
HIGH Level  
= Min, I = Max,  
OH  
OH  
CC  
2.7  
3.4  
Output Voltage  
= Max, BI /RBO  
IL  
I
Output HIGH Current Segment Outputs  
LOW Level  
V
V
V
= 5.5V, V = 15V a g  
250  
0.5  
µA  
OFF  
CC  
O
V
= Min, I = Max,  
OL  
OL  
CC  
0.35  
Output Voltage  
= Min, a g  
IH  
I
= 3.2 mA, BI /RBO  
= 12 mA, a –g  
0.5  
0.4  
0.4  
V
OL  
I
0.25  
OL  
I
= 1.6 mA, BI /RBO  
OL  
I
Input Current @ Max  
Input Voltage  
V
= Max, V = 7V  
I
I
CC  
CC  
CC  
CC  
CC  
100  
µA  
V
V
V
V
= Max, V = 10V  
I
I
HIGH Level Input Current  
LOW Level Input Current  
Short Circuit  
= Max, V = 2.7V  
20  
µA  
IH  
I
I
= Max, V = 0.4V  
0.4  
mA  
IL  
I
I
= Max (Note 9),  
OS  
mA  
mA  
Output Current  
I
at BI/RBO  
0.3  
2.0  
OS  
I
Supply Current  
V
= Max  
13  
CC  
CC  
Note 8: All typicals are at V = 5V, T = 25°C.  
CC  
A
Note 9: Not more than one output should be shorted at a time, and the duration should not exceed one second.  
Switching Characteristics  
at VCC = +5.0V, T = +25°C  
A
R
= 665Ω  
= 15 pF  
L
Symbol  
Parameter  
Conditions  
C
Units  
L
Min  
Max  
t
Propagation Delay  
100  
100  
100  
100  
PLH  
ns  
ns  
t
t
t
An to a –g  
PHL  
PLH  
PHL  
Propagation Delay  
RBI to a –g (Note 10)  
Note 10: LT = HIGH, A0–A3 = LOW  
www.fairchildsemi.com  
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