General Description
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 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.
FEATUREs
♦ Single-Piece, Reflowable, 27mm2 PBGA Package
Footprint
♦ Internal ML Battery and Charger
♦ Unconditionally Write-Protects SRAM when VCC
is Out-of-Tolerance
♦ Automatically Switches to Battery Supply when
VCC Power Failures Occur
♦ Internal Power-Supply Monitor Detects Power Fail
at 5% or 10% Below Nominal VCC (5V)
♦ Reset Output can be used as a CPU Supervisor
for a Microprocessor
♦ Industrial Temperature Range (-40°C to +85°C)
♦ UL Recognized
APPLICATIONs
RAID Systems and Servers
POS Terminals
Industrial Controllers
Data-Acquisition Systems
Gaming
Fire Alarms
Router/Switches
PLC