W3EG72125S-D3

-JD3

-AJD3

November 2004

Rev. 2

PRELIMINARY*

1

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

White Electronic Designs

White Electronic Designs Corp. reserves the right to change products or specifications without notice.

1GB – 2x64Mx72 DDR SDRAM REGISTERED ECC w/PLL

The W3EG72125S is a 2x64Mx72 Double Data Rate

SDRAM memory module based on 256Mb DDR SDRAM

components. The module consists of eighteen 2x64Mx4

stacked (36 components), 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 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.

DESCRIPTION

FEATURES

Double-data-rate architecture

Clock Speeds of 100MHz, 133MHz and 166MHz

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

JEDEC standard 184 pin DIMM package

• Package height options:

JD3: 30.48mm (1.20") and

AJD3: 28.70mm (1.13")

NOTE: Consult factory for availability of:

• RoHS compliant products

• Vendor source control options

• Industrial temperature option

OPERATING FREQUENCIES

DDR333 @CL=2.5

DDR266 @CL=2

DDR266 @CL=2

DDR266 @CL=2.5

DDR200 @CL=2

Clock Speed

166MHz

133MHz

133MHz

133MHz

100MHz

2.5-3-3

2-2-2

2-3-3

2.5-3-3

2-2-2