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参数资料
| 型号： | W3EG7232S262AD4-M |
| 厂商： | WHITE ELECTRONIC DESIGNS CORP |
| 元件分类： | DRAM |
| 英文描述： | 32M X 72 DDR DRAM MODULE, 0.75 ns, DMA200 |
| 封装： | SO-DIMM-200 |
| 文件页数： | 13/14页 |
| 文件大小： | 308K |
| 代理商： | W3EG7232S262AD4-M |
8
White Electronic Designs Corporation (602) 437-1520 www.wedc.com
White Electronic Designs
W3EG7232S-AD4
-BD4
August 2005
Rev. 4
PRELIMINARY
ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC OPERATING CONDITIONS (Continued)
AC CHARACTERISTICS
SYMBOL
335
262
265
202
UNITS NOTES
PARAMETER
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
DQ-DQS hold, DQS to rst DQ to go nonvalid, per
access
tQH
tHP - tQHS
ns
22, 23
Data Hold Skew Factor
tQHS
0.5
0.75
ns
ACTIVE to PRECHARGE command
tRAS
42
70,000
40
120,000
40
120,000
40
120,000
ns
31, 47
ACTIVE to READ with Auto precharge command
tRAP
15
20
ns
ACTIVE to ACTIVE/AUTO REFRESH command
period
tRC
60
65
ns
AUTO REFRESH command period
tRFC
72
75
ns
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
0.9
1.1
tCK
37
DQS read postamble
tRPST
0.4
0.6
0.4
0.6
0.4
0.6
0.4
0.6
tCK
37
ACTIVE bank a to ACTIVE bank b command
tRRD
12
15
ns
DQS write preamble
tWPRE
0.25
tCK
DQS write preamble setup time
tWPRES
0000
ns
18, 19
DQS write postamble
tWPST
0.4
0.6
0.4
0.6
0.4
0.6
0.4
0.6
tCK
17
Write recovery time
tWR
15
ns
Internal WRITE to READ command delay
tWTR
1111
tCK
Data valid output window (DVW)
na
tQH - tDQSQ
ns
22
REFRESH to REFRESH command interval
tREFC
70.3
s
21
Average periodic refresh interval
tREFI
7.8
0
7.8
s
Terminating voltage delay to VCC
tVTD
000
0
ns
Exit SELF REFRESH to non-READ command
tXSNR
75
ns
Exit SELF REFRESH to READ command
tXSRD
200
tCK
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相关代理商/技术参数 |
参数描述 |
|---|---|
| W3EG7232S262AD4-X | 制造商:WEDC 制造商全称:White Electronic Designs Corporation 功能描述:256MB - 32Mx72 DDR SDRAM UNBUFFERED w/PLL |
| W3EG7232S262BD4-X | 制造商:WEDC 制造商全称:White Electronic Designs Corporation 功能描述:256MB - 32Mx72 DDR SDRAM UNBUFFERED w/PLL |
| W3EG7232S265AD4-X | 制造商:WEDC 制造商全称:White Electronic Designs Corporation 功能描述:256MB - 32Mx72 DDR SDRAM UNBUFFERED w/PLL |
| W3EG7232S265BD4-X | 制造商:WEDC 制造商全称:White Electronic Designs Corporation 功能描述:256MB - 32Mx72 DDR SDRAM UNBUFFERED w/PLL |
| W3EG7232S335AD4-X | 制造商:WEDC 制造商全称:White Electronic Designs Corporation 功能描述:256MB - 32Mx72 DDR SDRAM UNBUFFERED w/PLL |
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