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W3EG128M72ETSU202JD3 Datasheet(PDF) 8 Page - White Electronic Designs Corporation

Part # W3EG128M72ETSU202JD3
Description  1GB - 128Mx72 DDR SDRAM UNBUFFERED ECC w/PLL
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Manufacturer  WEDC [White Electronic Designs Corporation]
Direct Link  http://www.whiteedc.com
Logo WEDC - White Electronic Designs Corporation

W3EG128M72ETSU202JD3 Datasheet(HTML) 8 Page - White Electronic Designs Corporation

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W3EG128M72ETSU-D3
-JD3
-AJD3
8
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
White Electronic Designs
January 2005
Rev. 0
ADVANCED
DDR SDRAM COMPONENT ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC
OPERATING CONDITIONS (Continued)
DDR400: VCC = VCCQ = +2.6V ± 0.1V
AC CHARACTERISTICS
403
355
262
265
202
PARAMETER
SYMBOL MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX UNITS NOTES
DQS write postamble
tWPST
0.4
0.6
0.4
0.6
0.4
0.6
0.4
0.6
0.4
0.6
tCK
17
Write recovery time
tWR
15
15
15
15
15
ns
Internal WRITE to READ command delay
tWTR
21111
tCK
Data valid output window
na
tQH - tDQSQ
tQH - tDQSQ
tQH - tDQSQ
tQH - tDQSQ
tQH - tDQSQ
ns
22
REFRESH to REFRESH command interval
tREFC
70.3
70.3
70.3
70.3
70.3
µs
21
Average periodic refresh interval
tREFI
7.8
7.8
7.8
7.8
7.8
µs
21
Terminating voltage delay to VCC
tVTD
00000
ns
Exit SELF REFRESH to non-READ command
tXSNR
75
75
75
75
80
ns
Exit SELF REFRESH to READ command
tXSRD
200
200
200
200
200
tCK


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