3.3V Single-Piece 1Mb Nonvolatile SRAM with Clock

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 VCC 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 VCC 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).

Applications

* Data Acquisition Systems * Fire Alarms * Gaming * Industrial Controllers * PLCs * POS Terminals * RAID Systems and Servers * Routers/Switches

* Single-Piece, Reflowable, 27mm x 27mm BGA Package Footprint

* Internal Manganese Lithium Battery and Charger

* Integrated Real-Time Clock

* Unconditionally Write-Protects the Clock and SRAM when VCC is Out-of-Tolerance

* Automatically Switches to Battery Supply when VCC Power Failures Occur

* Reset Output can be Used as a CPU Supervisor

* Interrupt Output can be Used as a CPU Watchdog Timer

* Industrial Temperature Range (-40°C to +85°C)