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IS61VPS51218A Datasheet(PDF) 1 Page - Integrated Silicon Solution, Inc

Part # IS61VPS51218A
Description  9 Mb SYNCHRONOUS PIPELINED, Single CYCLE DESELECT STATIC RAM
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Manufacturer  ISSI [Integrated Silicon Solution, Inc]
Direct Link  http://www.issi.com
Logo ISSI - Integrated Silicon Solution, Inc

IS61VPS51218A Datasheet(HTML) 1 Page - Integrated Silicon Solution, Inc

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Integrated Silicon Solution, Inc.
1
Rev. M
01/14/14
Copyright © 2014 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI assumes no
liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the latest version of this device specification before relying on
any published information and before placing orders for products.
IS61LPS51218A, IS61LPS25636A, IS61LPS25632A, IS64LPS25636A,
IS61VPS51218A, IS61VPS25636A
FEATURES
• Internalself-timedwritecycle
• IndividualByteWriteControlandGlobalWrite
• Clockcontrolled,registeredaddress,dataand
control
• BurstsequencecontrolusingMODEinput
• Threechipenableoptionforsimpledepthex-
pansion and address pipelining
• Commondatainputsanddataoutputs
• AutoPower-downduringdeselect
• Singlecycledeselect
• SnoozeMODEforreduced-powerstandby
• JTAGBoundaryScanforBGApackage
• PowerSupply
LPS:Vdd 3.3V + 5%, Vddq 3.3V/2.5V + 5%
VPS:Vdd 2.5V + 5%, Vddq 2.5V + 5%
• JEDEC100-PinQFP,119-ballBGA,and165-
ballBGApackages
• Lead-freeavailable
DESCRIPTION
The
ISSI IS61LPS/VPS25636A, IS61LPS25632A,
IS64LPS25636A and IS61LPS/VPS51218A are high-
speed, low-power synchronous static RAMs designed
to provide burstable, high-performance memory for com-
municationandnetworkingapplications.TheIS61LPS/
VPS25636A and IS64LPS25636A are organized as
262,144 words by 36 bits.The IS61LPS25632A is
organizedas262,144wordsby32bits.TheIS61LPS/
VPS51218Aisorganizedas524,288wordsby18bits.
Fabricated with
ISSI's advanced CMOS technology,
thedeviceintegratesa2-bitburstcounter,high-speed
SRAMcore,andhigh-drivecapabilityoutputsintoasingle
monolithic circuit. All synchronous inputs pass through
registerscontrolledbyapositive-edge-triggeredsingle
clock input.
Writecyclesareinternallyself-timedandareinitiatedby
therisingedgeoftheclockinput.Writecyclescanbe
one to four bytes wide as controlled by the write control
inputs.
Separate byte enables allow individual bytes to be written.
Thebytewriteoperationisperformedbyusingthebyte
write enable (BWE) input combined with one or more
individual byte write signals (BWx). Inaddition,Global
Write(GW) is available for writing all bytes at one time,
regardless of the byte write controls.
BurstscanbeinitiatedwitheitherADSP (Address Status
Processor)orADSC (Address Status Cache Controller)
inputpins.Subsequentburstaddressescanbegener-
ated internally and controlled by the ADV (burst address
advance) input pin.
Themodepinisusedtoselecttheburstsequenceor-
der,LinearburstisachievedwhenthispinistiedLOW.
InterleaveburstisachievedwhenthispinistiedHIGH
or left floating.
256K x 36, 256K x 32, 512K x 18
9 Mb SYNCHRONOUS PIPELINED,
SINgLE CYCLE DESELECT STATIC RAM
JANUARY 2014
FAST ACCESS TIME
Symbol
Parameter
250
200
166
Units
tkq
ClockAccessTime
2.6
3.1
3.5
ns
tkc
CycleTime
4
5
6
ns
Frequency
250
200
166
MHz


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