3.3V Single-Piece 1Mb Nonvolatile SRAM with Clock

All versions are No Longer Available. See Ordering Information for recommended replacements.

The DS3045W consists of a static RAM, a nonvolatile (NV) controller, a year 2000-compliant real-time clock (RTC), 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 clock and SRAM from the external power source, and allows the contents of the clock registers or SRAM to be modified. When V_CC is powered down or out-of-tolerance, the controller write-protects the memory contents and powers the clock and SRAM from the battery. The DS3045W also contains a power-supply monitor output (active-low RST), as well as a user-programmable interrupt output (active-low IRQ/FT).

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