WED3DG727V-D2
64MB- 8Mx72 SDRAM UNBUFFERED
DESCRIPTION
FEATURES
n Burst Mode Operation
The WED3DG727V is a 8Mx72 synchronous DRAM module
which consists of nine 8Mx8 SDRAM components in TSOP- 11
package, and one 2K EEPROM in an 8- pin TSSOP package for
Serial Presence Detect which are mounted on a 168 Pin DIMM
multilayer FR4 Substrate.
n Auto and Self Refresh capability
n LVTTL compatible inputs and outputs
n Serial Presence Detect with EEPROM
n Fully synchronous: All signals are registered on the positive
edge of the system clock
n Programmable Burst Lengths: 1, 2, 4, 8 or Full Page
n 3.3 volt 6 0.3v Power Supply
n 168- Pin DIMM JEDEC
*
This datasheet describes a product that may or may not be under development
and is subject to change or cancellation without notice.
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
PIN NAMES
Pin
1
2
Front
VSS
DQ0
DQ1
DQ2
DQ3
VDD
DQ4
DQ5
DQ6
DQ7
DQ8
VSS
DQ9
DQ10
DQ11
DQ12
DQ13
VDD
DQ14
DQ15
CB0
Pin
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Front
DQM1
CS0
DNU
VSS
A0
Pin
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
Front
DQ18
DQ19
VDD
DQ20
NC
*VREF
*CKE1
VSS
Pin
85
86
Back
VSS
Pin
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
Back
DQM5
*CS1
RAS
VSS
A1
Pin
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
Back
DQ50
DQ51
VDD
DQ52
NC
*VREF
NC
VSS
A0 A11
BA0-1
DQ0-63
CB0-7
CLK0,CLK2
CKE0
CS0,CS2
RAS
CAS
WE
DQM0-7
VDD
VSS
*VREF
SDA
SCL
SA0-2
DNU
NC
Address input (Multiplexed)
Select Bank
Data Input/Output
Check bit (Data-in/data-out)
Clock input
Clock Enable input
Chip select Input
Row Address Strobe
ColumnAddress Strobe
Write Enable
DQM
Power Supply (3.3V)
Ground
Power supply for reference
Serial data I/O
DQ32
DQ33
DQ34
DQ35
VDD
3
4
87
88
5
6
89
90
A2
A3
7
8
A4
A6
91
92
DQ36
DQ37
DQ38
DQ39
DQ40
VSS
DQ41
DQ42
DQ43
DQ44
DQ45
VDD
A5
A7
9
A8
A10/AP
BA1
DQ21
DQ22
DQ23
VSS
DQ24
DQ25
DQ26
DQ27
VDD
93
94
A9
BA0
A11
DQ53
DQ54
DQ55
VSS
DQ56
DQ57
DQ58
DQ59
VDD
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
95
96
97
VDD
VDD
CLK0
VSS
DNU
CS2
DQM2
DQM3
DNU
VDD
NC
VDD
*CLK1
*A12
VSS
CKE0
*CS3
DQM6
DQM7
*A13
VDD
NC
98
99
100
101
102
103
104
105
106
107
108
109
Serial clock
Address in EEPROM
Do not use
DQ28
DQ29
DQ30
DQ31
VSS
DQ60
DQ61
DQ62
DQ63
VSS
DQ46
DQ47
CB4
No Connect
CB1
VSS
NC
CB5
VSS
NC
NC
CLK2
NC
NC
CB6
CB7
*CLK3
NC
CB2
CB3
VSS
DQ16
DQ17
*
These pins are not used in this module.
NC
VDD
WE
NC
NC
**SA0
** These pins should be NC in the system which
does not support SPD.
**SDA110
**SCL
VDD
VDD
138
VSS
166 1 **SA
111
112
CAS
DQM4
139
140
DQ48
DQ49
167
168
**SA2
VDD
DQM0
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
Sept. 2002 Rev. 0
ECO #15459
1