| Компонент | Описание | Производитель | |
| SN74ALS561A | SYNCHRONOUS 4-BIT COUNTERS WITH 3-STATE OUTPUTS |
Texas Instruments |
|
| SN74ALS561ADW | SYNCHRONOUS 4-BIT COUNTERS WITH 3-STATE OUTPUTS |
Texas Instruments |
|
| SN74ALS561AN | SYNCHRONOUS 4-BIT COUNTERS WITH 3-STATE OUTPUTS |
Texas Instruments |