| 型号 | 厂家 | 封装 | 批号 |
| 74HC21D652 | Nexperi | 14-SOIC | 22+ |
| 74HC21D(BJ) | Toshiba | 14-SOIC | 22+ |
| 74VHCT374AMX | Fairchi | 20-SOIC | 22+ |
| 74VHCT244D118 | Nexperi | 20-SOIC | 22+ |
| 74VHCT574AM | Fairchi | 20-SOIC | 22+ |
| 74VHCT574AMX | Fairchi | 20-SOIC | 22+ |
| 74VHCT244AMX | Fairchi | 20-SOIC | 22+ |
| 74VHCT240ASJX | Fairchi | 20-SOIC | 22+ |
| 74VHCT244AM | Fairchi | 20-SOIC | 22+ |
| 74VHCT541D118 | Nexperi | 20-SOIC | 22+ |
