IS42/45R81600E
IS42/45R16800E
16M x 8, 8M x16
APRIL 2010
128Mb SYNCHRONOUS DRAM
OVERVIEW
FEATURES
ISSI'sꢀ128MbꢀSynchronousꢀDRAMꢀꢀachievesꢀhigh-speedꢀ
data transfer using pipeline architecture. All inputs and
outputs signals refer to the rising edge of the clock input.
Theꢀ128MbꢀSDRAMꢀisꢀorganizedꢀasꢀfollows.ꢀ
•ꢀ Clockꢀfrequency:ꢀ133,ꢀ125ꢀMHz
•ꢀ Fullyꢀsynchronous;ꢀallꢀsignalsꢀreferencedꢀtoꢀaꢀ
positive clock edge
•ꢀ Internalꢀbankꢀforꢀhidingꢀrowꢀaccess/precharge
•ꢀ Powerꢀsupply:ꢀ2.5Vꢀꢀ
•ꢀ LVTTLꢀinterface
IS42/45R81600Eꢀ IS42/45R16800Eꢀ
4Mꢀx8ꢀx4ꢀBanksꢀ 2Mꢀx16ꢀx4ꢀBanksꢀ
•ꢀ Programmableꢀburstꢀlengthꢀ
– (1, 2, 4, 8, full page)
54-pinꢀTSOPIIꢀ
54-pinꢀTSOPII
54-ballꢀTF-BGA
•ꢀ Programmableꢀburstꢀsequence:ꢀ
ꢀ
ꢀ
Sequential/Interleave
•ꢀ AutoꢀRefreshꢀ(CBR)
•ꢀ SelfꢀRefresh
•ꢀ 4096ꢀrefreshꢀcyclesꢀeveryꢀ16ꢀmsꢀ(A2ꢀgrade)ꢀorꢀ
64ꢀmsꢀ(A1ꢀgrade)
KEY TIMING PARAMETERS
•ꢀ Randomꢀcolumnꢀaddressꢀeveryꢀclockꢀcycle
Parameter
-75
-8
Unit
•ꢀ ProgrammableꢀCASꢀlatencyꢀ(2,ꢀ3ꢀclocks)
ClkꢀCycleꢀTimeꢀ
CASꢀLatencyꢀ=ꢀ3ꢀ
CASꢀLatencyꢀ=ꢀ2ꢀ
ꢀꢀ
ꢀ
ꢀ
ꢀ
ꢀ
8ꢀ
9.6ꢀ
ꢀ
ꢀ
ꢀ
•ꢀ Burstꢀread/writeꢀandꢀburstꢀread/singleꢀwriteꢀ
7.5ꢀ
9.6ꢀ
nsꢀ
ns
operations capability
•ꢀ Burstꢀterminationꢀbyꢀburstꢀstopꢀandꢀprechargeꢀ
ClkꢀFrequencyꢀ
CASꢀLatencyꢀ=ꢀ3ꢀ
CASꢀLatencyꢀ=ꢀ2ꢀ
ꢀꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
command
133ꢀ
104ꢀ
125ꢀ
104ꢀ
Mhzꢀ
Mhz
•ꢀ OperatingꢀTemperatureꢀRange:
Commercial: 0oC to +70oC
AccessꢀTimeꢀꢀfromꢀClockꢀ
CASꢀLatencyꢀ=ꢀ3ꢀ
CASꢀLatencyꢀ=ꢀ2ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
7ꢀ
8ꢀ
ꢀ
ꢀ
ꢀ
5.4ꢀ
6ꢀ
nsꢀ
ns
Industrial: -40oC to +85oC
Automotive Grade A1: -40oC to +85oC
Automotive Grade A2: -40oC to +105oC
Copyright © 2010 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time with-
out 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. A
04/15/2010