| Manufacturer | Part # | Datasheet | Description |
 Dallas Semiconductor |
DS1554
|
284Kb/21P |
256K NV Y2KC Timekeeping RAM
|
|
DS1554-100
|
284Kb/21P |
256K NV Y2KC Timekeeping RAM
|
|
DS1554-70
|
284Kb/21P |
256K NV Y2KC Timekeeping RAM
|
|
DS1554P-100
|
284Kb/21P |
256K NV Y2KC Timekeeping RAM
|
|
DS1554P-70
|
284Kb/21P |
256K NV Y2KC Timekeeping RAM
|
 Maxim Integrated Produc... |
DS1554P/YP/WP
|
114Kb/5P |
PowerCap with Crystal
Rev 10/10 |
 Dallas Semiconductor |
DS1554W-120
|
284Kb/21P |
256K NV Y2KC Timekeeping RAM
|
|
DS1554W-150
|
284Kb/21P |
256K NV Y2KC Timekeeping RAM
|
|
DS1554WP-120
|
284Kb/21P |
256K NV Y2KC Timekeeping RAM
|
|
DS1554WP-150
|
284Kb/21P |
256K NV Y2KC Timekeeping RAM
|