<74ls175引脚图>
74ls175管脚功能和内部结构图
74LS175的功能表
输 入 | 输 出 | ||||||||
RD | CP | 1D | 2D | 3D | 4D | 1Q | 2Q | 3Q | 4Q |
L | × | × | × | × | × | L | L | L | L |
H | ↑ | 1D | 2D | 3D | 4D | 1D | 2D | 3D | 4D |
H | H | × | × | × | × | 保 持 | |||
H | L | × | × | × | × | 保 持 |
输入
| 输出
| ||||
Sd''
| Rd''
| CP
| D
| Qn+1
| Qn+1''
|
0
| 1
| ×
| ×
| 1
| 0
|
1
| 0
| ×
| ×
| 0
| 1
|
0
| 0
| ×
| ×
| ∮
| ∮
|
1
| 1
| ↑
| 1
| 1
| 0
|
1
| 1
| ↑
| 0
| 0
| 1
|
1
| 1
| ↓
| ×
| Qn
| Qn''
|
图 74ls175抢答器电路原理图
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