| Part Number | DS1557 |
| Manufacturer | Dallas Semiconducotr |
| Title | 4MEG NV Y2KC Timekeeping RAM |
| Description | A0–A18 - Address Input DQ0–DQ7 IRQ/FT - Data Input/Outputs - Interrupt, Frequency Test Output (Open Drain) RST - Power-On Reset Output (Op... |
| Features |
Integrated NV SRAM, Real-Time Clock (RTC), Crystal, Power-Fail Control Circuit, and Lithium Energy Source Clock Registers are Accessed Identically to the Static RAM; These Registers Reside in the 16 Top RAM Locations Century Byte Register (i.e.... |
| Datasheet |
 DS1557 Datasheet
|
