The DS2045W is a 1Mb reflowable nonvolatile (NV) SRAM, consisting of a static RAM (SRAM), an NV controller, and an internal rechargeable manganese lithium (ML) battery. It is housed in a surface-mount module with a 256-ball BGA footprint. When VCC 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 VCC is powered down or out of tolerance, the controller write-protects the SRAM’s contents and powers the SRAM from the battery. The DS2045W also contains a power-supply monitor output, RST, which can be used as a CPU supervisor for a microprocessor.
The DS2045W is a 1Mb reflowable nonvolatile (NV) SRAM consisting of a static RAM, an NV controller, and an internal rechargeable manganese lithium (ML) battery. Encased in a surface-mount module with a 256-ball BGA footprint, it is suitable for applications such as RAID systems, servers, POS terminals, and industrial controllers. When power is applied, it recharges the battery and powers the SRAM from the external source; when power fails, it write-protects the SRAM and switches to battery power.
| Supply Voltage | 3.3V |
|---|---|
| Operating Temperature Range | -40°C to +85°C |
| Memory Capacity | 1Mb |
| Package Type | 256 Ball 27mm 2 BGA Module |
| Read Cycle Time | 100 ns |
| Write Cycle Time | 100 ns |
The controller write-protects the SRAM's contents and powers the SRAM from the battery.
Yes, the power-supply monitor output, RST, can be used as a CPU supervisor for a microprocessor.