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參數資料
| 型號： | W3EG6418S265JD3 |
| 廠商： | WHITE ELECTRONIC DESIGNS CORP |
| 元件分類： | DRAM |
| 英文描述： | 16M X 64 DDR DRAM MODULE, 0.75 ns, DMA184 |
| 封裝： | DIMM-184 |
| 文件頁數： | 11/12頁 |
| 文件大小： | 0K |
| 代理商： | W3EG6418S265JD3 |
8
White Electronic Designs Corporation (602) 437-1520 www.wedc.com
White Electronic Designs
W3EG6418S-D3
-JD3
May 2005
Rev. 3
PRELIMINARY
White Electronic Designs Corp. reserves the right to change products or specications without notice.
DDR SDRAM COMPONENT ELECTRICAL CHARACTERISTICS AND
RECOMMENDED AC OPERATING CONDITIONS (continued)
AC Characteristics
262
263/265
202
Parameter
Symbol
Min
Max
Min
Max
Min
Max
Units
Notes
ACTIVE to READ or WRITE delay
tRCD
15
20
ns
PRECHARGE command period
tRP
15
20
ns
DQS read preamble
tRPRE
0.9
1.1
0.9
1.1
0.9
1.1
tCK
19
DQS read postamble
tRPST
0.4
0.6
0.4
0.6
0.4
0.6
tCK
ACTIVE bank a to ACTIVE bank b command
tRRD
15
ns
DQS write preamble
tWPRE
0.25
tCK
DQS write preamble setup time
tWPRES
0
ns
10,11
DQS write postamble
tWPST
0.4
0.6
0.4
0.6
0.4
0.6
tCK
9
Write recovery time
tWR
15
ns
Internal WRITE to READ command delay
tWTR
111
tCK
Data valid output window
NA
tQH-tDQSQ
ns
13
REFRESH to REFRESH command interval
tREFC
140.6
μs
12
Average periodic refresh interval
tREFI
15.6
μs
12
Terminating voltage delay to VCC
tVTD
000
ns
Exit SELF REFRESH to non-READ command
tXSNR
75
ns
Exit SELF REFRESH to READ command
tXSRD
200
tCK
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