器件名称: W3EG7235S-JD3
功能描述: 256MB - 2x16Mx72 DDR SDRAM REGISTERED ECC, w/PLL
文件大小: 305.55KB 共12页
简 介:White Electronic Designs
W3EG7235S-JD3
PRELIMINARY*
256MB – 2x16Mx72 DDR SDRAM REGISTERED ECC, w/PLL
FEATURES
Double-data-rate architecture Speeds of 100MHz and 133MHz Bi-directional data strobes (DQS) Differential clock inputs (CK# & CK) Programmable Read Latency 2,2.5 (clock) Programmable Burst Length (2,4,8) Programmable Burst type (sequential & interleave) Edge aligned data output, center aligned data input Auto and self refresh Serial presence detect Dual Rank Power supply: 2.5V ± 0.20V JEDEC standard 184 pin DIMM package Package height option: JD3 30.48 mm (1:20")
NOTE: Consult factory for availability of: RoHS compliant products Vendor source control options Industrial temperature option * This product is under development, is not qualied or characterized and is subject to change without notice.
DESCRIPTION
The WED3DG7235S is a 2x16Mx72 Double Data Rate SDRAM memory module based on 128Mb DDR SDRAM component. The module consists of eighteen 16Mx8 DDR SDRAMs in 66 pin TSOP packages mounted on a 184 pin FR4 substrate. Synchronous design allows precise cycle control with the use of system clock. Data I/O transactions are possible on both edges and Burst Lengths allow the same device to be useful for a variety of high bandwidth, high performance memory system applications.
OPERATING FREQUENCIES
DDR266 @CL=2 Clock Speed CL-tRCD-tRP 133MHz 2-2-2 DDR266 @CL=2.5 133MHz 2.5-3-3 DDR200 @CL=2 100MHz 2-2-2
November 2004 Rev. 2
1
White Electronic Designs Corporation (602……
