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W3EG72255S263D3

Description
DDR DRAM Module, 256MX72, 0.75ns, CMOS, DIMM-184
Categorystorage    storage   
File Size237KB,14 Pages
ManufacturerMicrosemi
Websitehttps://www.microsemi.com
Download Datasheet Parametric View All

W3EG72255S263D3 Overview

DDR DRAM Module, 256MX72, 0.75ns, CMOS, DIMM-184

W3EG72255S263D3 Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerMicrosemi
Parts packaging codeDIMM
package instructionDIMM,
Contacts184
Reach Compliance Codeunknown
ECCN codeEAR99
access modeDUAL BANK PAGE BURST
Maximum access time0.75 ns
Other featuresAUTO/SELF REFRESH
JESD-30 codeR-XDMA-N184
JESD-609 codee4
memory density19327352832 bit
Memory IC TypeDDR DRAM MODULE
memory width72
Number of functions1
Number of ports1
Number of terminals184
word count268435456 words
character code256000000
Operating modeSYNCHRONOUS
Maximum operating temperature70 °C
Minimum operating temperature
organize256MX72
Package body materialUNSPECIFIED
encapsulated codeDIMM
Package shapeRECTANGULAR
Package formMICROELECTRONIC ASSEMBLY
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
self refreshYES
Maximum supply voltage (Vsup)2.7 V
Minimum supply voltage (Vsup)2.3 V
Nominal supply voltage (Vsup)2.5 V
surface mountNO
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceGold (Au)
Terminal formNO LEAD
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
White Electronic Designs
W3EG72255S-D3
-JD3
-AJD3
PRELIMINARY*
2GB-256Mx72 DDR SDRAM REGISTERED ECC, 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
Power supply: V
CC =
2.5V ± 0.2V
JEDEC standard 184 pin DIMM package
• Package height options:
JD3: 30.48mm (1.2"),
AJD3: 28.70mm (1.13")
• Consult factory for availability of lead-free
products.
*This product is under development, is not qualified or characterized and is subject to
change without notice.
DESCRIPTION
The W3EG72255S is a 256Mx72 Double Data Rate
SDRAM memory module based on 512Mb DDR SDRAM
component. The module consists of eighteen 256Mx4
stacks, in 66 pin TSOP packages mounted on a 184 pin
FR4 substrate. This module is structured as 2 Ranks of
128Mx72 DDR SDRAM.
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
DDR333 @CL=2.5
Clock Speed
CL-t
RCD
-t
RP
166MHz
2.5-3-3
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
November 2004
Rev. 2
1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
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