W3EG64255S-JD3 Datasheet, PDF (1/13 Pages) White Electronic Designs Corporation – 2GB - 2x128Mx64 DDR SDRAM REGISTERED, w/PLL

White Electronic Designs
W3EG64255S-JD3
ADVANCED*
2GB – 2x128Mx64 DDR SDRAM REGISTERED, w/PLL
FEATURES
Double-data-rate architecture
DDR200, DDR266 and DDR333;
• 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
Dual Rank
Power supply: VCC 2.5V ± 0.2V
JEDEC standard 184 pin DIMM package
• JD3: 30.48 (1.20")
DESCRIPTION
The W3EG64255S is a 2x128Mx64 Double Data Rate
SDRAM memory module based on 512Mb DDR SDRAM
component. The module consists of sixteen 256Mx4
stacks, 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 or cancellation without notice.
NOTE: Consult factory for availability of:
• RoHS compliant products
• Vendor source control options
• Industrial temperature option
Clock Speed
CL-tRCD-tRP
DDR333 @CL=2.5
166MHz
2.5-3-3
OPERATING FREQUENCIES
DDR266 @CL=2
133MHz
2-2-2
DDR266 @CL=2
133MHz
2-3-3
DDR266 @CL=2.5
133MHz
2.5-3-3
DDR200 @CL=2
100MHz
2-2-2
April 2005
Rev. 3
1
White Electronic Designs Corporation • [phone] • www.wedc.com