IS62WV25616DALL/DBLL, IS65WV25616DBLL
256K x 16 LOW VOLTAGE,
ULTRA LOW POWER CMOS STATIC SRAM
JUNE 2013
FEATURES
DESCRIPTION
TheꢀISSIꢀIS62WV25616DALLꢀandꢀIS62/65WV25616DBLLꢀ
areꢀꢀhigh-speed,ꢀlowꢀpower,ꢀ4MꢀbitꢀSRAMsꢀorganizedꢀasꢀ
256K words by 16 bits. It is fabricated using ISSI's high-
performanceꢀCMOSꢀtechnology.ꢀThisꢀhighlyꢀreliableꢀprocessꢀ
coupled with innovative circuit design techniques, yields
high-performance and low power consumption devices.
•ꢀ High-speed access time: 35, 45, 55 ns
•ꢀ CMOSꢀlowꢀpowerꢀoperation
30 mW (typical) operating
ꢀ 6ꢀµWꢀ(typical)ꢀCMOSꢀstandby
•ꢀ TTLꢀcompatibleꢀinterfaceꢀlevels
•ꢀ Singleꢀpowerꢀsupplyꢀꢀ
When CS1 is HIGH (deselected) or when CS2 is LOW
(deselcted) or when CS1ꢀisꢀLOW,ꢀCS2ꢀisꢀHIGHꢀandꢀbothꢀ
LB and UB are HIGH, the device assumes a standby mode
at which the power dissipation can be reduced down with
CMOSꢀinputꢀlevels.
1.65V--2.2V Vdd (IS62WV25616DALL)
2.5V--3.6V Vdd ꢀ(IS62/65WV25616DBLL)
Easy memory expansion is provided by using Chip Enable
andꢀOutputꢀEnableꢀinputs.ꢀTheꢀactiveꢀLOWꢀWriteꢀEnableꢀ(WE)
controls both writing and reading of the memory.A data byte
allows Upper Byte (UB)ꢀandꢀLowerꢀByteꢀ(LB) access.
•ꢀ Fullyꢀstaticꢀoperation:ꢀnoꢀclockꢀorꢀrefresh
required
•ꢀ Threeꢀstateꢀoutputs
•ꢀ Dataꢀcontrolꢀforꢀupperꢀandꢀlowerꢀbytes
•ꢀ IndustrialꢀandꢀAutomotiveꢀtemperatureꢀsupport
•ꢀ Lead-freeꢀavailable
TheꢀIS62WV25616DALLꢀandꢀIS62/65WV25616DBLLꢀareꢀ
packaged in the JEDEC standard 44-PinꢀTSOPꢀ(TYPEꢀII)
and 48-pin mini BGA (6mmx8mm).
•ꢀ 2ꢀCSꢀoptionꢀavailable
FUNCTIONAL BLOCK DIAGRAM
256K x 16
MEMORY ARRAY
A0-A17
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 lat-
est 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 ex-
pected 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. D
06/19/2013