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參數資料
| 型號： | W3EG72128S265JD3 |
| 英文描述： | 1GB - 2x64Mx72 DDR SDRAM UNBUFFERED |
| 中文描述： | 1GB的- 2x64Mx72 DDR內存緩沖 |
| 文件頁數： | 7/12頁 |
| 文件大小： | 245K |
| 代理商： | W3EG72128S265JD3 |
7
White Electronic Designs Corporation (602) 437-1520 www.wedc.com
W3EG72128S-D3
-JD3
May 2005
Rev. 3
ADVANCED
White Electronic Designs
DDR SDRAM COMPONENT ELECTRICAL CHARACTERISTICS AND
RECOMMENDED AC OPERATING CONDITIONS
DDR400: V
CC
= V
CCQ
= +2.6V ± 0.1V; DDR333, 266, 200: V
CC
= V
CCQ
= +2.5V ± 0.2V
AC Characteristics
403
335
262/265
202
Parameter
Access window of DQs from CK, CK#
CK high-level width
CK low-level width
Clock cycle time
Symbol
t
AC
t
CH
t
CL
t
CK
(3)
t
CK
(2.5)
t
CK
(2)
t
DH
t
DS
t
DIPW
t
DQSCK
t
DQSH
t
DQSL
t
DQSQ
Min
-0.70
0.45
0.45
5
6
7.5
0.45
0.45
1.75
-0.60
0.35
0.35
Max
+0.70
0.55
0.55
7.5
13
13
Min
-0.70
0.45
0.45
6
6
7.5
0.45
0.45
1.75
-0.60
Max
+0.70
0.55
0.55
13
13
13
Min
-0.75
0.45
0.45
7.5
7.5
7.5
0.5
0.5
1.75
-0.75
0.35
0.35
Max
+0.75
0.55
0.55
13
13
13
Min
-0.75
0.45
0.45
7.5
7.5
10
0.5
0.5
1.75
-0.75
0.35
0.35
Max
+0.75
0.55
0.55
13
13
13
Units
ns
t
CK
t
CK
ns
ns
ns
ns
ns
ns
ns
t
CK
t
CK
ns
Notes
16
16
22
22
22
CL=3
CL=2.5
CL=2
DQ and DM input hold time relative to DQS
DQ and DM input setup time relative to DQS
DQ and DM input pulse width (for each input)
Access window of DQS from CK, CK#
DQS input high pulse width
DQS input low pulse width
DQS-DQ skew, DQS to last DQ valid, per group,
per access
Write command to first DQS latching transition
DQS falling edge to CK rising - setup time
DQS falling edge from CK rising - hold time
Half clock period
Data-out high-impedance window from CK, CK#
Data-out low-impedance window from CK, CK#
Address and control input hold time (fast slew rate)
Address and control input set-up time (fast slew rate)
Address and control input hold time (slow slew rate)
Address and control input setup time (slow slew rate)
Address and control input pulse width (for each input)
LOAD MODE REGISTER command cycle time
DQ-DQS hold, DQS to first DQ to go non-valid, 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
14,17
14,17
17
+0.60
+0.60
0.35
0.35
0.45
+0.75
+0.75
0.40
0.5
0.5
13,14
t
DQSS
t
DSS
t
DSH
t
HP
t
HZ
t
LZ
t
IHf
t
ISf
t
IHs
t
ISs
t
IPW
t
MRD
t
QH
0.72
0.2
0.2
t
CH
, t
CL
1.28
0.75
0.2
0.2
t
CH
, t
CL
1.25
0.75
0.2
0.2
t
CH
, t
CL
1.25
0.75
0.2
0.2
t
CH
, t
CL
1.25
t
CK
t
CK
t
CK
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
18
8,19
8,20
6
6
6
6
+0.70
+0.70
+0.75
+0.75
-0.70
0.60
0.60
0.60
0.60
2.2
10
t
HP
-t
QHS
-0.70
0.75
0.75
0.80
0.80
2.2
12
t
HP
-t
QHS
-0.75
0.90
0.90
1
1
2.2
15
t
HP
-t
QHS
-0.75
0.90
0.90
1
1
2.2
15
t
HP
-t
QHS
13,14
t
QHS
t
RAS
t
RAP
t
RC
t
RFC
0.55
70,000
0.55
70,000
0.75
120,000
0.75
120,000
ns
ns
ns
ns
ns
40
15
55
70
42
15
60
72
40
15
60
75
45
20
65
75
15
21
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| W3EG72128S335JD3 | 1GB - 2x64Mx72 DDR SDRAM UNBUFFERED |
| W3EG72128S403D3 | 1GB - 2x64Mx72 DDR SDRAM UNBUFFERED |
| W3EG72128S403JD3 | 1GB - 2x64Mx72 DDR SDRAM UNBUFFERED |
| W3EG72128S-D3 | 1GB - 2x64Mx72 DDR SDRAM UNBUFFERED |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W3EG72128S335AD4-XG | 制造商:WEDC 制造商全稱:White Electronic Designs Corporation 功能描述:1GB - 2x64Mx72 DDR SDRAM UNBUFFERED ECC w/PLL |
| W3EG72128S335BD4-XG | 制造商:WEDC 制造商全稱:White Electronic Designs Corporation 功能描述:1GB - 2x64Mx72 DDR SDRAM UNBUFFERED ECC w/PLL |
| W3EG72128S335D3 | 制造商:WEDC 制造商全稱:White Electronic Designs Corporation 功能描述:1GB - 2x64Mx72 DDR SDRAM UNBUFFERED |
| W3EG72128S335JD3 | 制造商:WEDC 制造商全稱:White Electronic Designs Corporation 功能描述:1GB - 2x64Mx72 DDR SDRAM UNBUFFERED |
| W3EG72128S403D3 | 制造商:WEDC 制造商全稱:White Electronic Designs Corporation 功能描述:1GB - 2x64Mx72 DDR SDRAM UNBUFFERED |
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