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DS2065W Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. DS2065W
Description  3.3V Single-Piece 8Mb Nonvolatile SRAM
Download  12 Pages
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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DS2065W Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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General Description
The DS2065W is a 8Mb 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 mod-
ified. 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 DS2065W also
contains a power-supply monitor output, RST, which can
be used as a CPU supervisor for a microprocessor.
Applications
RAID Systems and Servers
POS Terminals
Industrial Controllers
Routers/Switches
Data-Acquisition Systems
Fire Alarms
Gaming
PLC
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
Below Nominal VCC (3.3V)
♦ Reset Output can be Used as a CPU Supervisor
for a Microprocessor
♦ Industrial Temperature Range (-40°C to +85°C)
♦ UL Recognized
DS2065W 3.3V Single-Piece 8Mb
Nonvolatile SRAM
______________________________________________ Maxim Integrated Products
1
Rev 0; 1/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
Pin Configuration appears at end of data sheet.
PART
TEMP RANGE
PIN-PACKAGE
SPEED (ns)
SUPPLY TOLERANCE (%)
DS2065W-100
-40°C to +85°C
256 Ball 27mm2 BGA Module
100
3.3V ±0.3V
Typical Operating Circuit
(CE)
DATA
ADDRESS
(INT)
RST
A0–19
DQ0–7
CE
20 BITS
8 BITS
MICROPROCESSOR
OR DSP
DS2065W
1024k x 8
NV SRAM
(WR)
WE
(RD)
OE


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