器件名称: W3EG2256M72ASSR202JD3XG
功能描述: 4GB - 2x256Mx72 DDR SDRAM REGISTERED ECC, w/PLL
文件大小: 217.15KB 共14页
简 介:White Electronic Designs
W3EG2256M72ASSR-JD3 -AJD3
PRELIMINARY*
4GB – 2x256Mx72 DDR SDRAM REGISTERED ECC, w/PLL
FEATURES
Double-data-rate architecture DDR200, and DDR266: JEDEC design specications 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: VCC = 2.5V ± 0.2V JEDEC standard 184 pin DIMM package Package height options: JD3: 30.48mm (1.2"), AJD3: 28.70mm (1.13")
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 W3EG2256M72ASSR is a 2x256Mx72 Double Data Rate SDRAM memory module based on 1Gb DDR SDRAM components. The module consists of eighteen 512Mx4 stacks, 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 133MHz 2-3-3 DDR266 @CL=2.5 133MHz 2.5-3-3 DDR200 ……
