| Компонент | Описание | Производитель | |
| DM74LS161AM | Synchronous 4-Bit Binary Counters |
Fairchild Semiconductor |
|
| DM74LS161AM | Synchronous 4-Bit Binary Counters |
National Semiconductor |
|
| DM74LS161AMX | Synchronous 4-Bit Binary Counter with Asynchronous Clear |
Fairchild Semiconductor |