PRELIMINARY*

1

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

White Electronic Designs

W3EG6433S-D3

-JD3

November 2005

Rev. 2

DDR266 and DDR333

Double-data-rate architecture

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

Power supply: 2.5V ± 0.2V

JEDEC 184 pin DIMM package

• JD3 PCB height: 30.48 (1.20")

NOTE: Consult factory for availability of:

• RoHS compliant products

• Vendor source control options

• Industrial temperature option

256MB – 2x16Mx64 DDR SDRAM UNBUFFERED

FEATURES

DESCRIPTION

The W3EG6433S is a 2x16Mx64 Double Data Rate

SDRAM memory module based on 256Mb DDR SDRAM

component. The module consists of sixteen 16Mx8 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.

OPERATING FREQUENCIES

DDR333@CL=2.5

DDR266 @CL=2

DDR266 @CL=2

DDR266 @CL=2.5

Clock Speed

166MHz

133MHz

133MHz

133MHz

2.5-3-3

2-2-2

2-3-3

2.5-3-3