74F521SC и другие
| Компонент | Описание | Производитель | |
| 74F521SC | 8-Bit Identity Comparator |
Fairchild Semiconductor |
 |
| 74F521SC | 8-Bit Identity Comparator |
National Semiconductor |
|
| 74F521SCX | 8-Bit Identity Comparator |
Fairchild Semiconductor |
|
| 74F521SJ | 8-Bit Identity Comparator |
National Semiconductor |
|
| 74F521SJ | 8-Bit Identity Comparator |
Fairchild Semiconductor |
|
| 74F521SJX | 8-Bit Identity Comparator |
Fairchild Semiconductor |
|