七段數(shù)碼管譯碼器驅(qū)動(dòng)器74LS48引腳圖及譯碼表
七段數(shù)碼管譯碼器驅(qū)動(dòng)器74LS48引腳圖及譯碼表

 

74ls48引腳圖

74ls48引腳功能表—七段譯碼驅(qū)動(dòng)器功能表


十進(jìn)數(shù)

或功能
輸入
BI/RBO
輸出
備注


LT
RBI
D C B A
a
b
c
d
e
f
g


0
H
H
0 0 0 0
H
1
1
1
1
1
1
0
1


1
H
x
0 0 0 1
H
0
1
1
0
0
0
0


2
H
x
0 0 1 0
H
1
1
0
1
1
0
1


3
H
x
0 0 1 1
H
1
1
1
1
0
0
1


4
H
x
0 1 0 0
H
0
1
1
0
0
1
1


5
H
x
0 1 0 1
H
1
0
1
1
0
1
1


6
H
x
0 1 1 0
H
0
0
1
1
1
1
1


7
H
x
0 1 1 1
H
1
1
1
0
0
0
0


8
H
x
1 0 0 0
H
1
1
1
1
1
1
1


9
H
x
1 0 0 1
H
1
1
1
0
0
1
1


10
H
x
1 0 1 0
H
0
0
0
1
1
0
1


11
H
x
1 0 1 1
H
0
0
1
1
0
0
1

12

H

x

1 1 0 0

H

0

1

0

0

0

1

1

13
H
x
1 1 0 1
H
1
0
0
1
0
1
1


14
H
x
1 1 1 0
H
0
0
0
1
1
1
1


15
H
x
1 1 1 1
H
0
0
0
0
0
0
0


BI
x
x
x x x x
L
0
0
0
0
0
0
0
2


RBI
H
L
0 0 0 0
L
0
0
0
0
0
0
0
3


LT
L
x
x x x x
H
1
1
1
1
1
1
1
4

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