| Компонент | Описание | Производитель | |
| DS1556W-120 | 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
Dallas Semiconductor |
|
| DS1556W-120+ | 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
Maxim Integrated Products |
|
| DS1556W-120IND | 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
Dallas Semiconductor |
|
| DS1556W-120IND+ | 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
Maxim Integrated Products |