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IS61VF204818A-6.5B3I PDF预览

IS61VF204818A-6.5B3I

更新时间: 2024-11-20 05:39:35
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美国芯成 - ISSI /
页数 文件大小 规格书
20页 330K
描述
36Mb SYNCHRONOUS FLOW-THROUGH STATIC RAM

IS61VF204818A-6.5B3I 数据手册

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IS61LF102436A IS61VF102436A  
IS61LF204818A IS61VF204818A  
1M x 36, 2M x 18  
36Mb SYNCHRONOUS FLOW-THROUGH  
STATIC RAM  
APRIL 2008  
FEATURES  
DESCRIPTION  
The ISSI IS61LF/VF102436A and IS61LF/VF204818A  
are high-speed, low-power synchronous static RAMs de-  
signed to provide burstable, high-performance memory for  
communication and networking applications.The IS61LF/  
VF102436Aꢀisꢀorganizedꢀasꢀ1,048,476ꢀwordsꢀbyꢀ36ꢀbits.ꢀ  
The IS61LF/VF204818Aꢀisꢀorganizedꢀasꢀ2M-wordsꢀbyꢀ18ꢀ  
bits. Fabricated with ISSI'sꢀadvancedꢀCMOSꢀtechnology,ꢀ  
the device integrates a 2-bit burst counter, high-speed  
SRAMꢀcore,ꢀandꢀhigh-driveꢀcapabilityꢀoutputsꢀintoꢀaꢀsingleꢀ  
monolithic circuit. All synchronous inputs pass through  
registers controlled by a positive-edge-triggered single  
clock input.  
•ꢀ Internalꢀself-timedꢀwriteꢀcycle  
•ꢀ IndividualꢀByteꢀWriteꢀControlꢀandꢀGlobalꢀWrite  
•ꢀ Clockꢀcontrolled,ꢀregisteredꢀaddress,ꢀdataꢀandꢀ  
control  
•ꢀ BurstꢀsequenceꢀcontrolꢀusingꢀMODEꢀinputꢀꢀ  
•ꢀ Three chip enable option for simple depth expan-  
sion and address pipelining  
•ꢀ Commonꢀdataꢀinputsꢀandꢀdataꢀoutputs  
•ꢀ AutoꢀPower-downꢀduringꢀdeselect  
•ꢀ Singleꢀcycleꢀdeselect  
Writecyclesareinternallyself-timedandareinitiatedbytheꢀ  
risingꢀedgeꢀofꢀtheꢀclockꢀinput.ꢀWriteꢀcyclesꢀcanꢀbeꢀoneꢀtoꢀ  
four bytes wide as controlled by the write control inputs.  
•ꢀ SnoozeꢀMODEꢀforꢀreduced-powerꢀstandby  
•ꢀ PowerꢀSupply  
Separate byte enables allow individual bytes to be written.  
Byteꢀwriteꢀoperationꢀisꢀperformedꢀbyꢀusingꢀbyteꢀwriteꢀen-  
able (BWE) input combined with one or more individual  
byte write signals (BWx). Inꢀaddition,ꢀGlobalꢀWriteꢀ(GW)  
is available for writing all bytes at one time, regardless of  
the byte write controls.  
LF: Vd d 3.3V + 5%, Vd d q 3.3V/2.5V + 5%  
VF: Vd d 2.5V + 5%, Vd d q 2.5V + 5%  
•ꢀ JEDECꢀ100-PinꢀTQFPꢀandꢀ165-pinꢀPBGAꢀpack-  
ages.  
BurstsꢀcanꢀbeꢀinitiatedꢀwithꢀeitherꢀADSP (Address Status  
Processor)ꢀorꢀADSC (Address Status Cache Controller)  
inputpins.Subsequentburstaddressescanbegener-  
ated internally and controlled by the ADV (burst address  
advance) input pin.  
•ꢀ Lead-freeꢀavailable  
Theꢀmodeꢀpinꢀisꢀusedꢀtoꢀselectꢀtheꢀburstꢀsequenceꢀorder,ꢀ  
LinearꢀburstꢀisꢀachievedꢀwhenꢀthisꢀpinꢀisꢀtiedꢀLOW.ꢀInter-  
leaveꢀburstꢀisꢀachievedꢀwhenꢀthisꢀpinꢀisꢀtiedꢀHIGHꢀorꢀleftꢀ  
floating.  
FAST ACCESS TIME  
Symbol  
Parameter  
-6.5  
6.5ꢀ  
7.5ꢀ  
133ꢀ  
-7.5  
7.5ꢀ  
8.5ꢀ  
117ꢀ  
Units  
ns  
tk q  
tk c  
ClockꢀAccessꢀTimeꢀ  
CycleꢀTimeꢀ  
ns  
Frequencyꢀ  
MHz  
Copyright © 2006 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 lat-  
est version of this device specification before relying on any published information and before placing orders for products.  
Integrated Silicon Solution, Inc.  
1
Rev. B  
04/17/08  

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