andꢀOutputꢀEnableꢀinputs.
TheꢀactiveꢀLOWWriteꢀEnableꢀ(WE)
IS65WV25616ALL
IS65WV25616BLL
256K x 16 LOW VOLTAGE, ULTRA
LOW POWER CMOS STATIC SRAM
JUNE 2017
FEATURES
DESCRIPTION
TheꢀISSIꢀIS65WV25616ALL/IS65WV25616BLLꢀꢀareꢀꢀhigh-
speed,ꢀlowꢀpower,ꢀ4MꢀbitꢀSRAMsꢀorganizedꢀasꢀ256Kꢀwordsꢀ
by 16 bits. It is fabricated using ISSI's high-performance
CMOSꢀtechnology.ꢀThisꢀhighlyꢀreliableꢀprocessꢀcoupledꢀwithꢀ
innovativecircuitdesigntechniques,yieldshigh-performance
and low power consumption devices.
•ꢀ High-speedꢀaccessꢀtime:ꢀ55ns,ꢀ70ns
•ꢀ CMOSꢀlowꢀpowerꢀoperation
36 mW (typical) operating
ꢀ 9ꢀµWꢀ(typical)ꢀCMOSꢀstandby
•ꢀ TTLꢀcompatibleꢀinterfaceꢀlevels
•ꢀ Singleꢀpowerꢀsupplyꢀꢀ
When CS1ꢀisꢀHIGHꢀ(deselected)ꢀorꢀwhen CS1 is LOW, and
both LB and UBꢀareꢀHIGH,ꢀtheꢀdeviceꢀassumesꢀaꢀstandbyꢀ
mode at which the power dissipation can be reduced down
withꢀCMOSꢀinputꢀlevels.
ꢀ 1.65V--2.2VꢀVdd (65WV25616ALL)
ꢀ 2.5V--3.6VꢀVdd ꢀ(65WV25616BLL)
•ꢀ Fullyꢀstaticꢀoperation:ꢀnoꢀclockꢀorꢀrefreshꢀrequired
•ꢀ Threeꢀstateꢀoutputs
EasyꢀmemoryꢀexpansionꢀisꢀprovidedꢀbyꢀusingꢀChipꢀEnableꢀ
controls both writing and reading of the memory.A data byte
•ꢀ Dataꢀcontrolꢀforꢀupperꢀandꢀlowerꢀbytes
•ꢀ TEMPERATUREꢀOFFERINGS:
ꢀ OptionꢀA1:ꢀꢀ-40°Cꢀtoꢀ+85°C
ꢀ OptionꢀA2:ꢀ-40°Cꢀtoꢀ+105°C
ꢀ OptionꢀA3:ꢀ-40°Cꢀtoꢀ+125°C
•ꢀ Lead-freeꢀavailable
allowsꢀUpperꢀByteꢀ(UB)ꢀandꢀLowerꢀByteꢀ(LB) access.
TheꢀIS65WV25616BALL/65WV25616BLLꢀꢀareꢀpackagedꢀ
inꢀtheꢀJEDECꢀstandardꢀ44-PinꢀTSOPꢀ(TYPEꢀII)ꢀandꢀ48-pinꢀ
miniꢀBGAꢀ(6mmx8mm).
FUNCTIONAL BLOCK DIAGRAM
256K x 16
MEMORY ARRAY
A0-A17
DECODER
VDD
GND
I/O0-I/O7
Lower Byte
I/O
DATA
COLUMN I/O
CIRCUIT
I/O8-I/O15
Upper Byte
CS1
OE
WE
UB
LB
CONTROL
CIRCUIT
Copyright © 2017 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 reason-
ably 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
25616LL_BLK.eps
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. E
06/12/2017