DS3045W

Features:

Single-Piece, Reflowable, 27mm x 27mm BGAPackage Footprint
Internal Manganese Lithium Battery and Charger
Integrated Real-Time Clock
Unconditionally Write-Protects the Clock andSRAM when V_CC is Out-of-Tolerance
Automatically Switches to Battery Supply whenV_CC Power Failures Occur
Reset Output can be Used as a CPU Supervisor
Interrupt Output can be Used as a CPU WatchdogTimer
Industrial Temperature Range (-40 to +85)
UL Recognized


Application

RAID Systems and Servers            Gaming
POS Terminals                                FireAlarms
Industrial Controllers                     PLCs
Data-Acquisition Systems               Routers/Switches


Specifications

Voltage Range on Any Pin Relative to Ground....-0.3V to +4.6V
Operating Temperature Range ..........................-40 to +85
Storage Temperature Range ...............................-40vto +85
Soldering Temperature Range.......See IPC/JEDEC J-STD-020C


Description

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 sur-face-mount module with a 256-ball BGA footprint.Whenever V_CC is applied to the module, it rechargesthe ML battery, powers the clock and SRAM from theexternal power source, and allows the contents of theclock registers or SRAM to be modified. When V_CC ispowered down or out-of-tolerance, the controller write-protects the memory contents and powers the clockand SRAM from the battery. The DS3045W also con-tains a power-supply monitor output (RST), as well as auser-programmable interrupt output (IRQ/FT).