| Компонент | Описание | Производитель | |
| SN54ALS561A | SYNCHRONOUS 4-BIT COUNTERS WITH 3-STATE OUTPUTS |
Texas Instruments |
|
| SN54ALS561AFK | SYNCHRONOUS 4-BIT COUNTERS WITH 3-STATE OUTPUTS |
Texas Instruments |
|
| SN54ALS561AJ | SYNCHRONOUS 4-BIT COUNTERS WITH 3-STATE OUTPUTS |
Texas Instruments |