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IS43R32800B-6BI

更新时间: 2024-10-28 00:52:19
品牌 Logo 应用领域
美国芯成 - ISSI /
页数 文件大小 规格书
39页 556K
描述
Differential clock input

IS43R32800B-6BI 数据手册

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IS43R32800B  
8Mx32  
PRELIMINARY INFORMATION  
MAY 2008  
256Mb DDR Synchronous DRAM  
FEATURES  
DESCRIPTION:  
IS43R32800B is a 4-bank x 2,097,152-word x32bit  
Double Data Rate Synchronous DRAM, with SSTL_2  
interface. All control and address signals are referenced  
to the rising edge of CLK. Input data is registered on  
both edges of data strobe, and output data and data  
strobe are referenced on both edges of CLK. The  
IS43R32800B achieves very high speed clock rate up to  
200 MHz. It is packaged in 144-ball FBGA.  
•ꢀ Vd d /Vd d q =2.5V+0.2V (-5, -6, -75)  
•ꢀ Double data rate architecture; two data transfers  
per clock cycle  
•ꢀ Bidirectional, data strobe (DQS) is transmitted/  
received with data  
•ꢀ Differential clock input (CLK and /CLK)  
•ꢀ DLL aligns DQ and DQS transitions with CLK  
transitions edges of DQS  
•ꢀ Commands entered on each positive CLK edge;  
•ꢀ Data and data mask referenced to both edges of  
KEY TIMING PARAMETERS  
DQS  
Parameter  
-5  
-6  
-75 Unit  
•ꢀ 4 bank operation controlled by BA0, BA1 (Bank  
Clk Cycle Time  
Address)  
CAS Latency = 3  
CAS Latency = 2.5  
CAS Latency = 2  
5
5
7.5  
6
6
7.5  
7.5  
7.5  
7.5  
ns  
ns  
ns  
•ꢀ /CAS latency –2.0/2.5/3.0 (programmable)  
•ꢀ Burst length - 2/4/8 (programmable)  
•ꢀ Burst type - Sequential/ Interleave (program-  
Clk Frequency  
mable)  
CAS Latency = 3  
CAS Latency = 2.5  
CAS Latency = 2  
200  
200  
143  
167  
167  
143  
143 MHz  
143 MHz  
143 MHz  
•ꢀ Auto precharge / All bank precharge controlled  
by A8  
Access Time from Clock  
CAS Latency = 3  
•ꢀ 4096 refresh cycles/ 64ms (4 banks concurrent  
+0.70 +0.70 +0.70 ns  
refresh)  
CAS Latency = 2.5 +0.70 +0.70 +0.70 ns  
CAS Latency = 2 +0.75 +0.75 +0.70 ns  
•ꢀ Auto refresh and Self refresh  
•ꢀ Row address A0-11/ Column address A0-7, A9-  
SSTL_2 Interface  
•ꢀ Package 144-ball FBGA  
•ꢀ Available in Industrial Temperature  
•ꢀ Temperature Range:  
Commercial (0oC to +70oC)  
Industrial (-40oC to +85oC)  
ADDRESS TABLE  
Parameter  
8M x 32  
Configuration  
2M x 32 x 4 banks  
BA0, BA1  
Bank Address Pins  
Autoprecharge Pins  
Row Addresses  
Column Addresses  
Refresh Count  
A8/AP  
A0 – A11  
A0 – A7, A9  
4096 / 64ms  
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. — www.issi.com  
1
Rev. 00D  
03/19/08  

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