DS2045Y

The DS2045 is a 1Mb reflowable nonvolatile (NV) SRAM,which consists of a static RAM (SRAM), an NV controller,and an internal rechargeable manganese lithium (ML) battery. These components are encased in a surface-mount module with a 256-ball BGA footprint.

Whenever V_CC is applied to the module, it recharges the ML battery, powers the SRAM from the external power source, and allows the contents of the SRAM to be modified.When V_CC is powered down or out of tolerance,the controller write-protects the SRAM's contents and powers the SRAM from the battery. Two versions of the DS2045 are available, which provide either a 5% or 10% power-monitoring trip point. The DS2045 also contains a power-supply monitor output, RST, which can be used as a CPU supervisor for a microprocessor.