| Компонент | Описание | Производитель | |
| DS1644P-120 | Nonvolatile Timekeeping RAM |
Dallas Semiconductor |
|
| DS1644P-120+ | Nonvolatile Timekeeping RAM |
Maxim Integrated Products |
|
| DS1644P120+ | Nonvolatile Timekeeping RAM |
Dallas Semiconductor |