performanceꢀCMOSꢀtechnology.Thisꢀhighlyꢀreliableꢀprocessꢀ
IS66WV51216EALL
IS66/67WV51216EBLL
ADVANCED INFORMATION
NOVEMBER 2013
8Mb LOW VOLTAGE,
ULTRA LOW POWER PSEUDO CMOS STATIC RAM
FEATURES
DESCRIPTION
•ꢀ High-speedꢀaccessꢀtime:ꢀꢀ
TheꢀISSIIS66WV51216EALLandIS66/67WV51216EBLL
areꢀhigh-speed,ꢀ8MꢀbitꢀstaticꢀRAMsꢀorganizedꢀasꢀ512Kꢀ
words by 16 bits. It is fabricated using ISSI'sꢀ high-
– 70ns (IS66WV51216EALL, IS66/67WV51216EBLL)
– 55ns (IS66/67WV51216EBLL)
•ꢀ CMOSꢀlowꢀpowerꢀoperation
•ꢀ Singleꢀpowerꢀsupplyꢀꢀ
coupled with innovative circuit design techniques, yields
high-performanceꢀandꢀlowꢀpowerꢀconsumptionꢀdevices.
– Vddꢀ=ꢀ1.7V-1.95Vꢀ(IS66WV51216EALL)
– Vddꢀ=ꢀ2.5V-3.6V (IS66/67WV51216EBLL)
•ꢀ Threeꢀstateꢀoutputs
When CS1ꢀisꢀHIGHꢀ(deselected)ꢀorꢀwhenꢀCS2ꢀisꢀLOꢁ
(deselected)thedeviceassumesastandbymodeatwhich
theꢀpowerꢀdissipationꢀcanꢀbeꢀreducedꢀdownꢀwithꢀCMOSꢀ
input levels.
•ꢀ Dataꢀcontrolꢀforꢀupperꢀandꢀlowerꢀbytes
•ꢀ Industrialꢀtemperatureꢀavailableꢀ
•ꢀ Lead-freeꢀavailableꢀ
Easy memory expansion is provided by using Chip Enable
andꢀOutputꢀEnableꢀinputs.ꢀTheꢀactiveꢀLOꢁꢀꢁriteꢀEnableꢀ
(WE) controls both writing and reading of the memory. A
data byte allows Upper Byte (UB) and Lower Byte (LB)
access.
TheꢀIS66ꢁV51216EALLꢀandꢀIS66/67ꢁV51216EBLLꢀareꢀ
packagedꢀinꢀtheꢀJEDECꢀstandardꢀ48-ballꢀminiꢀBGAꢀ(6mmꢀ
xꢀ8mm)ꢀandꢀ44-PinꢀTSOPꢀ(TYPEꢀII).ꢀTheꢀdeviceꢀisꢀasloꢀ
available for die sales.
FUNCTIONAL BLOCK DIAGRAM
512K x 16
MEMORY ARRAY
A0-A18
DECODER
V
DD
GND
I/O0-I/O7
Lower Byte
I/O
DATA
COLUMN I/O
CIRCUIT
I/O8-I/O15
Upper Byte
CS2
CS1
OE
CONTROL
CIRCUIT
WE
UB
LB
Copyright © 2013 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.
Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause
failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written
assurance to its satisfaction, that:
a.) the risk of injury or damage has been minimized;
b.) the user assume all such risks; and
c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
Integrated Silicon Solution, Inc. — www.issi.com
1
Rev. 00A
11/22/2013