White Electronic Designs

1

White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

PRELIMINARY*

May 2005

Rev. 6

W3EG6432S-D3

-JD3

FEATURES

Double-data-rate architecture

DDR200, DDR266, DDR333 and 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:

166MHz)

JEDEC standard 184 pin DIMM package

• JD3 PCB height: 30.48 (1.20") max

NOTE: Consult factory for availability of:

• Lead-free products

• Vendor source control option

• Industrial temperature option

DESCRIPTION

The W3EG6432S is a 32Mx64 Double Data Rate

SDRAM memory module based on 256Mb DDR SDRAM

components. The module consists of eight 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.

* This product is under development, is not qualified or characterized and is subject to

change without notice.

256MB – 32Mx64 DDR SDRAM UNBUFFERED

OPERATING FREQUENCIES

DDR400 @CL=3

DDR333 @CL=2.5

DDR266 @CL=2

DDR266 @CL=2

DDR266 @CL=2.5

DDR200 @CL=2

Clock Speed

200MHz

166MHz

133MHz

133MHz

133MHz

100MHz

3-3-3

2.5-3-3

2-2-2

2-3-3

2.5-3-3

2-2-2