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參數(shù)資料
| 型號： | W3EG7232S-AD4 |
| 英文描述： | 256MB - 32Mx72 DDR SDRAM UNBUFFERED w/PLL |
| 中文描述： | 256MB的- 32Mx72 DDR內(nèi)存緩沖瓦特/鎖相環(huán) |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 321K |
| 代理商： | W3EG7232S-AD4 |
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
t
QH
335
262
265
202
UNITS NOTES
ns
PARAMETER
DQ-DQS hold, DQS to first DQ to go nonvalid, per
access
Data Hold Skew Factor
ACTIVE to PRECHARGE command
ACTIVE to READ with Auto precharge command
ACTIVE to ACTIVE/AUTO REFRESH command
period
AUTO REFRESH command period
ACTIVE to READ or WRITE delay
PRECHARGE command period
DQS read preamble
DQS read postamble
ACTIVE bank a to ACTIVE bank b command
DQS write preamble
DQS write preamble setup time
DQS write postamble
Write recovery time
Internal WRITE to READ command delay
Data valid output window (DVW)
REFRESH to REFRESH command interval
Average periodic refresh interval
Terminating voltage delay to V
CC
Exit SELF REFRESH to non-READ command
Exit SELF REFRESH to READ command
MIN
t
HP -
t
QHS
MAX
MIN
t
HP -
t
QHS
MAX
MIN
t
HP -
t
QHS
MAX
MIN
t
HP -
t
QHS
MAX
22, 23
t
QHS
t
RAS
t
RAP
t
RC
0.5
0.75
120,000
0.75
120,000
0.75
120,000
ns
ns
ns
ns
42
15
60
70,000
40
15
60
40
15
60
40
20
65
31, 47
t
RFC
t
RCD
t
RP
t
RPRE
t
RPST
t
RRD
t
WPRE
t
WPRES
t
WPST
t
WR
t
WTR
na
t
REFC
t
REFI
t
VTD
t
XSNR
t
XSRD
72
15
15
0.9
0.4
12
0.25
0
0.4
15
1
75
15
15
0.9
0.4
15
0.25
0
0.4
15
1
t
QH -
t
DQSQ
75
15
15
0.9
0.4
15
0.25
0
0.4
15
1
75
20
20
0.9
0.4
15
0.25
0
0.4
15
1
t
QH -
t
DQSQ
ns
ns
ns
t
CK
t
CK
ns
t
CK
ns
t
CK
ns
t
CK
ns
μs
μs
ns
ns
t
CK
1.1
0.6
1.1
0.6
1.1
0.6
1.1
0.6
37
37
18, 19
17
0.6
0.6
0.6
0.6
22
21
70.3
7.8
70.3
7.8
70.3
7.8
70.3
7.8
0
0
0
0
0
75
200
75
200
75
200
75
200
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W3EG7232S-BD4 | 制造商:WEDC 制造商全稱:White Electronic Designs Corporation 功能描述:256MB - 32Mx72 DDR SDRAM UNBUFFERED w/PLL |
| W3EG7232SXXXAD4-MG | 制造商:WEDC 制造商全稱:White Electronic Designs Corporation 功能描述:256MB - 32Mx72 DDR SDRAM UNBUFFERED w/PLL |
| W3EG7232SXXXAD4-SG | 制造商:WEDC 制造商全稱:White Electronic Designs Corporation 功能描述:256MB - 32Mx72 DDR SDRAM UNBUFFERED w/PLL |
| W3EG7234S202AJD3 | 制造商:WEDC 制造商全稱:White Electronic Designs Corporation 功能描述:256MB - 32Mx72 DDR SDRAM REGISTERED, w/PLL |
| W3EG7234S202D3 | 制造商:WEDC 制造商全稱:White Electronic Designs Corporation 功能描述:256MB - 32Mx72 DDR SDRAM REGISTERED, w/PLL |
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