| Компонент | Описание | Производитель | |
| DS1556-70 | 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
Dallas Semiconductor |
|
| DS1556-70+ | 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
Maxim Integrated Products |
|
| DS1556-70IND | 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
Dallas Semiconductor |
|
| DS1556-70IND+ | 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
Maxim Integrated Products |