W3EG7234S-D3

White Electronic Designs W3EG7234S-D3 -JD3 -AJD3 PRELIMINARY* 256MB - 32Mx72 DDR SDRAM REGISTERED, w/PLL FEATURES Double-data-rate architecture Clock speeds: 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 Power Supply: 2.5V ± 0.20V JEDEC standard 184 pin DIMM package www.DataSheet4U.com DESCRIPTION The W3EG7234S is a 32Mx72 Double Data Rate SDRAM memory module based on 128Mb DDR SDRAM component. The module consists of eighteen 32Mx4 DDR SDRAMs in 66 pin TSOP package 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 Lenths allow the same device to be useful for a variety of high bandwidth, high performance memory system applications. * This product is under development, is not qualified or characterized and is subject to change without notice. Package height options: JD3: 30.48mm (1.20") AJD3: 28.70mm (1.13") 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 December 2004 Rev. 2 1 White Electronic Designs Corporation (602) 437-1520 www.wedc.com White Electronic Designs PIN CONFIGURATIONS PIN 1 2 3 4 5 6 7 8 ...