【圖】七段數碼管譯碼器驅動器74LS48引腳圖_74LS48譯碼表
(2016/3/23 9:18:00)
七段數碼管譯碼器驅動器74LS48引腳圖及譯碼表
七段數碼管譯碼器驅動器74LS48引腳圖及譯碼表
74ls48引腳圖
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七段數碼管譯碼器驅動器74LS48引腳圖及譯碼表
74ls48引腳圖
| 74ls48引腳功能表—七段譯碼驅動器功能表 | ||||||||||||
|
十進數 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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