The DS2045W 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. The DS2045W also
contains a power-supply monitor output, RST-bar, which can
be used as a CPU supervisor for a microprocessor.
Key Features
Applications/Uses
Single-Piece, Reflowable, 27mm x 27mm BGA 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
Below Nominal VCC (3.3V)
Reset Output can be used as a CPU Supervisor
for a Microprocessor
Notes: *This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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