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DESCRIPTION The WED3EG7232S is a 32Mx72 Double Data Rate SDRAM memory module based on 256Mb DDR SDRAM components. The module consists of nine 32Mx8 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. FEATURES ■ Double-data-rate architecture ■ DDR200, DDR266, DDR333 amd DDR400 • JEDEC design specifications ■ 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: • VCC = VCCQ = +2.5V ± 0.2V (100, 133 and 166MHz) • VCC = VCCQ = +2.6V ± 0.1V (200MHz) ■ JEDEC 184 pin DIMM package • JD3 PCB height: 30.48 (1.20") Max
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