DS2070W SRAM Datasheet

DS2070W Datasheet PDF, Equivalent


Part Number

DS2070W

Description

3.3V Single Piece 16Mb Nonvolatile SRAM

Manufacture

Maxim Integrated Products

Total Page 12 Pages
PDF Download
Download DS2070W Datasheet PDF


DS2070W
www.DataSheet4U.com
Rev 0; 8/06
3.3V Single-Piece 16Mb
Nonvolatile SRAM
General Description
The DS2070W is a 16Mb 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 DS2070W also
contains a power-supply monitor output, RST, which can
be used as a CPU supervisor for a microprocessor.
RAID Systems and Servers
Industrial Controllers
Data-Acquisition Systems
Gaming
Applications
POS Terminals
Routers/Switches
Fire Alarms
PLC
Features
o Single-Piece, Reflowable, 27mm2 PBGA Package
Footprint
o Internal ML Battery and Charger
o Unconditionally Write-Protects SRAM when VCC
is Out-of-Tolerance
o Automatically Switches to Battery Supply when
VCC Power Failures Occur
o Internal Power-Supply Monitor Detects Power Fail
Below Nominal VCC (3.3V)
o Reset Output can be Used as a CPU Supervisor
for a Microprocessor
o Industrial Temperature Range (-40°C to +85°C)
o UL Recognized
Pin Configuration appears at end of data sheet.
Ordering Information
PART
DS2070W-100#
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
256 Ball 27mm2 BGA Module
SPEED (ns)
100
SUPPLY TOLERANCE
3.3V ±0.3V
#Denotes a RoHS-compliant device that may include lead that is exempt under the RoHS requirements.
Typical Operating Circuit
(CE)
(WR)
(RD)
MICROPROCESSOR
OR DSP
DATA
ADDRESS
(INT)
8 BITS
21 BITS
CE
WE
OE
DS2070W
2048k x 8
NV SRAM
DQ0–DQ7
A0–A20
RST
______________________________________________ Maxim Integrated Products 1
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.

DS2070W
www.DataSheet4U.com
3.3V Single-Piece 16Mb
Nonvolatile SRAM
ABSOLUTE MAXIMUM RATINGS
Voltage on Any Pin Relative to Ground .................-0.3V to +4.6V
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range ...............................-40°C to +85°C
Soldering Temperature .....................See IPC/JEDEC J-STD-020
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
(TA = -40°C to +85°C.)
PARAMETER
Supply Voltage
Input Logic 1
Input Logic 0
SYMBOL
VCC
VIH
VIL
CONDITIONS
MIN TYP MAX UNITS
3.0 3.3 3.6
V
2.2
VCC
V
0 0.4 V
DC ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±0.3V, TA = -40°C to +85°C.)
PARAMETER
Input Leakage Current
I/O Leakage Current
Output-Current High
Output-Current Low
Output-Current Low RST
Standby Current
Operating Current
Write-Protection Voltage
SYMBOL
IIL
IIO
IOH
IOL
IOL RST
ICCS1
ICCS2
ICCO1
VTP
CONDITIONS
CE = VCC
At 2.4V
At 0.4V
At 0.4V (Note 1)
CE = 2.2V
CE = VCC - 0.2V
tRC = 200ns, outputs open
MIN
-1.0
-1.0
-1.0
2.0
10.0
2.8
TYP
0.5
0.2
2.9
MAX
+1.0
+1.0
7
5
50
3.0
UNITS
µA
µA
mA
mA
mA
mA
mA
V
CAPACITANCE
(TA = +25°C.)
PARAMETER
Input Capacitance
Input/Output Capacitance
SYMBOL
CIN
COUT
Not tested
Not tested
CONDITIONS
MIN TYP MAX UNITS
7 pF
7 pF
AC ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±0.3V, TA = -40°C to +85°C.)
PARAMETER
Read Cycle Time
Access Time
OE to Output Valid
CE to Output Valid
SYMBOL
tRC
tACC
tOE
tCO
CONDITIONS
2 _____________________________________________________________________
MIN
MAX
UNITS
100 ns
100 ns
50 ns
100 ns


Features www.DataSheet4U.com Rev 0; 8/06 3.3V S ingle-Piece 16Mb Nonvolatile SRAM Gener al Description The DS2070W is a 16Mb re flowable nonvolatile (NV) SRAM, which c onsists of a static RAM (SRAM), an NV c ontroller, and an internal rechargeable manganese lithium (ML) battery. These components are encased in a surface-mou nt module with a 256-ball BGA footprint . Whenever VCC is applied to the module , it recharges the ML battery, powers t he 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 wri te-protects the SRAM’s contents and p owers the SRAM from the battery. The DS 2070W also contains a power-supply moni tor output, RST, which can be used as a CPU supervisor for a microprocessor. 2 7mm2 Features o Single-Piece, Reflowab le, PBGA Package Footprint o Internal M L Battery and Charger o Unconditionally Write-Protects SRAM when VCC is Out-of -Tolerance o Automatically Switches to Battery Supply when VCC Po.
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