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EBE25UC8AAFA-4A-E PDF预览

EBE25UC8AAFA-4A-E

更新时间: 2024-11-07 06:55:27
品牌 Logo 应用领域
尔必达 - ELPIDA 存储内存集成电路动态存储器双倍数据速率
页数 文件大小 规格书
22页 227K
描述
256MB Unbuffered DDR2 SDRAM DIMM

EBE25UC8AAFA-4A-E 技术参数

是否Rohs认证: 符合生命周期:Obsolete
零件包装代码:DIMM包装说明:DIMM,
针数:240Reach Compliance Code:unknown
ECCN代码:EAR99HTS代码:8542.32.00.36
风险等级:5.84Is Samacsys:N
访问模式:SINGLE BANK PAGE BURST最长访问时间:0.6 ns
其他特性:AUTO/SELF REFRESHJESD-30 代码:R-XDMA-N240
内存密度:2147483648 bit内存集成电路类型:DDR DRAM MODULE
内存宽度:64功能数量:1
端口数量:1端子数量:240
字数:33554432 words字数代码:32000000
工作模式:SYNCHRONOUS最高工作温度:85 °C
最低工作温度:组织:32MX64
封装主体材料:UNSPECIFIED封装代码:DIMM
封装形状:RECTANGULAR封装形式:MICROELECTRONIC ASSEMBLY
峰值回流温度(摄氏度):NOT SPECIFIED认证状态:Not Qualified
自我刷新:YES最大供电电压 (Vsup):1.9 V
最小供电电压 (Vsup):1.7 V标称供电电压 (Vsup):1.8 V
表面贴装:NO技术:CMOS
温度等级:OTHER端子形式:NO LEAD
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
Base Number Matches:1

EBE25UC8AAFA-4A-E 数据手册

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PRELIMINARY DATA SHEET  
256MB Unbuffered DDR2 SDRAM DIMM  
EBE25UC8AAFA (32M words × 64 bits, 1 Rank)  
Description  
Features  
The EBE25UC8AAFA is 32M words × 64 bits, 1 rank  
DDR2 SDRAM unbuffered module, mounting 8 pieces  
of 256M bits DDR2 SDRAM sealed in FBGA (µBGA)  
package. Read and write operations are performed at  
the cross points of the CK and the /CK. This high-  
speed data transfer is realized by the 4 bits prefetch-  
pipelined architecture. Data strobe (DQS and /DQS)  
both for read and write are available for high speed and  
reliable data bus design. By setting extended mode  
register, the on-chip Delay Locked Loop (DLL) can be  
set enable or disable. This module provides high  
density mounting without utilizing surface mount  
240-pin socket type dual in line memory module  
(DIMM)  
PCB height: 30.0mm  
Lead pitch: 1.0mm  
Lead-free  
1.8V power supply  
Data rate: 533Mbps/400Mbps (max.)  
1.8V (SSTL_18 compatible) I/O  
Double-data-rate architecture: two data transfers per  
clock cycle  
Bi-directional, differential data strobe (DQS and  
/DQS) is transmitted/received with data, to be used in  
capturing data at the receiver  
technology.  
Decoupling capacitors are mounted  
beside each FBGA (µBGA) on the module board.  
DQS is edge aligned with data for READs: center-  
aligned with data for WRITEs  
Note: Do not push the components or drop the  
modules in order to avoid mechanical defects,  
which may result in electrical defects.  
Differential clock inputs (CK and /CK)  
DLL aligns DQ and DQS transitions with CK  
transitions  
Commands entered on each positive CK edge: data  
and data mask referenced to both edges of DQS  
Four internal banks for concurrent operation  
(components)  
Data mask (DM) for write data  
Burst lengths: 4, 8  
/CAS Latency (CL): 3, 4, 5  
Auto precharge operation for each burst access  
Auto refresh and self refresh modes  
7.8µs average periodic refresh interval  
Posted CAS by programmable additive latency for  
better command and data bus efficiency  
Off-Chip-Driver Impedance Adjustment and On-Die-  
Termination for better signal quality  
/DQS can be disabled for single-ended Data Strobe  
operation  
Document No. E0465E10 (Ver. 1.0)  
Date Published February 2004 (K) Japan  
URL: http://www.elpida.com  
This product became EOL in April, 2005.  
Elpida Memory, Inc. 2004  

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