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參數資料
| 型號： | WED3DG6366V7D2 |
| 廠商： | WHITE ELECTRONIC DESIGNS CORP |
| 元件分類： | DRAM |
| 英文描述： | 64M X 64 SYNCHRONOUS DRAM MODULE, 5.4 ns, DMA168 |
| 封裝： | DIMM-168 |
| 文件頁數： | 5/9頁 |
| 文件大?。?/td> | 169K |
| 代理商： | WED3DG6366V7D2 |
5
White Electronic Designs Corporation (602) 437-1520 www.whiteedc.com
White Electronic Designs
WED3DG6466V-D2
May 2005
Rev. 1
White Electronic Designs Corp. reserves the right to change products or specications without notice.
ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC OPERATING CONDITIONS
VCC, VCCQ = +3.3V ±0.3V
AC CHARACTERISTICS
SYMBOL
7
7.5
10
UNITS
NOTE
PARAMETER
MIN
MAX
MIN
MAX
MIN
MAX
Access timefrom CLK (pos.edge)
CL = 3
tAC(3)
5.4
6
ns
27
CL = 2
tAC(2)
5.4
6
ns
Address hold time
tAH
0.8
1
ns
Address setup time
tAS
1.5
2
ns
CLK high-level width
tCH
2.5
3
ns
CLK low-level width
tCL
2.5
3
ns
Clock cycle time
CL = 3
tCK(3)
7
7.5
8
ns
23
CL = 2
tCK(2)
7.5
10
ns
23
CKE hold time
tCKH
0.8
1
ns
CKE setup time
tCKS
1.5
2
ns
CS#, RAS#, CAS#, WE#, DQM hold time
tCMH
0.8
1
ns
CS#, RAS#, CAS#, WE#, DQM setup time
tCMS
1.5
2
ns
Data-in hold time
tDH
0.8
1
ns
Data-in setup time
tDS
1.5
2
ns
Data-out high-impedance time
CL = 3
tHZ(3)
5.4
6
ns
10
CL = 2
tHZ(2)
5.4
6
ns
10
Data-out low-impedance time
tLZ
111
ns
Data-out hold time (load)
tOH
2.7
ns
Data-out hold time (no load)
tOHN
1.8
ns
28
ACTIVE to PRECHARGE command
tRAS
37
120,000
44
120,000
50
120,000
ns
ACTIVE to ACTIVE command period
tRC
60
66
ns
ACTIVE to READ or WRITE delay
tRCD
15
20
ns
Refresh period
tREF
64
ms
AUTOREFRESH period
tRFC
66
ns
PRECHARGE command period
tRP
15
20
ns
ACTIVE bank a to ACTIVE bank b command
tRRD
14
15
ns
Transition time
tT
0.3
1.2
0.3
1.2
0.3
1.2
ns
7
WRITE recovery time
tWR
1 CLK
+
7ns
1 CLK
+
7.5ns
1 CLK
+
7.5ns
24
14
15
ns
25
Exit SELF REFRESH to ACTIVE command
tXSR
67
75
80
ns
20
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