| Компонент | Описание | Производитель | |
| CD74AC191 | Presettable Synchronous 4-Bit Binary Up/Down Counter |
Texas Instruments |
|
| CD74AC191E | Presettable Synchronous 4-Bit Binary Up/Down Counter |
Texas Instruments |
|
| CD74AC191M | Presettable Synchronous 4-Bit Binary Up/Down Counter |
Texas Instruments |