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