White Electronic Designs
WED3EG72512SXX-JD3
-AJD3
ADVANCED*
4GB-2x256Mx72 DDR SDRAM REGISTERED ECC
FEATURES
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Double data rate architecture
DDR200 and DDR266
鈥?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
JEDEC standard 184 pin DIMM package
Power supply: V
DD
: 2.5V 鹵 0.2V
Package Option JD3 30.46 (1.20") and
AJD3 28.68 (1.13")
This product is under development, is not qualified or characterized and is subject to
change or cancellation without notice.
DESCRIPTION
The WED3EG72512SXX-JD3 is a 2x256Mx72 Double
Data Rate SDRAM memory module based on 1 GB DDR
SDRAM components. The module consists of thirtysix 1GB
stacked 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.
OPERATING FREQUENCIES
262JD3
265JD3
202JD3
DDR266 @CL=2 DDR266 @CL=2.5 DDR200 @CL=2
133MHz
133MHz
100MHz
133MHz
2-3-3
133MHz
2.5-3-3
鈥撯€撯€撯€撯€?/div>
2-2-2
Speed @ CS=2
Speed @ CS=2.5
CL-t
RCD
-t
RP
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
February, 2004
Rev. 0
1
White Electronic Designs Corporation 鈥?(602) 437-1520 鈥?www.whiteedc.com
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