The DS1330 256k NV SRAM has a minimum data retention of 10 years in the absence of external power.
The document describes the DS1330A/BP series of 256k Nonvolatile Static RAMs manufactured by Dallas Semiconductor (now Maxim Integrated). These devices feature a self-contained lithium energy source and control circuitry that monitors Vcc for out-of-tolerance conditions, automatically switching to battery backup when power is lost. The SRAMs are organized as 32,768 words by 8 bits and provide data retention without additional support circuitry.
| Memory Capacity | 256k (32,768 words x 8 bits) |
|---|---|
| Data Retention | 10 years minimum |
| Access Time (Typical) | 70ns |
The device provides a minimum of 10 years of data retention in the absence of external power.
The device automatically performs periodic battery voltage monitoring on a 24-hour time interval, asserting a warning output if the voltage falls below 2.6V.