| Компонент | Описание | Производитель | |
| DM74LS190 | Synchronous 4-Bit Up/Down Counters with Mode Control |
National Semiconductor |
|
| DM74LS190M | Synchronous 4-Bit Up/Down Counters with Mode Control |
National Semiconductor |
|
| DM74LS190N | Synchronous 4-Bit Up/Down Counters with Mode Control |
National Semiconductor |