SN74LS490D и другие
| Компонент | Описание | Производитель | |
| SN74LS490 | DUAL 4-BIT DECADE COUNTERS |
Texas Instruments |
 |
| SN74LS490D | DUAL DECADE COUNTER |
Motorola, Inc |
|
| SN74LS490N | DUAL DECADE COUNTER |
Motorola, Inc |
|