74LS85
簡介74LS85為 4-bit Magntude Comparators。
簡圖
功能表
74LS85
簡介
74LS85為 4-bit Magntude Comparators。簡圖
功能表
| COMPARING
INPUTS |
COMPARING
OUTPUTS |
OUTPUTS | |||||||
|---|---|---|---|---|---|---|---|---|---|
| A3,B3 | A2,B2 | A1,B1 | A0,B0 | A>B | A<B | A=B | A>B | A<B | A=B |
| A3>B3 | X | X | X | X | X | X | 1 | 0 | 0 |
| A3<B3 | X | X | X | X | X | X | 0 | 1 | 0 |
| A3=B3 | A2>B2 | X | X | X | X | X | 1 | 0 | 0 |
| A3=B3 | A2<B2 | X | X | X | X | X | 0 | 1 | 0 |
| A3=B3 | A2=B2 | A1>B1 | X | X | X | X | 1 | 0 | 0 |
| A3=B3 | A2=B2 | A1<B1 | X | X | X | X | 0 | 1 | 0 |
| A3=B3 | A2=B2 | A1=B1 | A0>B0 | X | X | X | 1 | 0 | 0 |
| A3=B3 | A2=B2 | A1=B1 | A0<B0 | X | X | X | 0 | 1 | 0 |
| A3=B3 | A2=B2 | A1=B1 | A0=B0 | 1 | 0 | 0 | 1 | 0 | 0 |
| A3=B3 | A2=B2 | A1=B1 | A0=B0 | 0 | 1 | 0 | 0 | 1 | 0 |
| A3=B3 | A2=B2 | A1=B1 | A0=B0 | 0 | 0 | 1 | 0 | 0 | 1 |