White Electronic Designs
64MB- 8Mx72 SDRAM UNBUFFERED
FEATURES
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Burst Mode Operation
Auto and Self Refresh capability
LVTTL compatible inputs and outputs
Serial Presence Detect with EEPROM
Fully synchronous: All signals are registered on the positive
edge of the system clock
Programmable Burst Lengths: 1, 2, 4, 8 or Full Page
3.3V
鹵
0.3V Power Supply
144 Pin SO-DIMM JEDEC
WED3DG728V-D1
DESCRIPTION
The WED3DG728V is a 8Mx72 synchronous DRAM
module which consists of nine 8Mx8 SDRAM components
in TSOP II package, and one 2Kb EEPROM in an 8 pin
TSSOP package for Serial Presence Detect which
are mounted on a 144 pin SO-DIMM multilayer FR4
Substrate.
* This product is subject to change without notice.
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
PIN
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
FRONT
V
SS
DQ0
DQ1
DQ2
DQ3
V
CC
DQ4
DQ5
DQ6
DQ7
V
SS
DQMB0
DQMB1
V
CC
A0
A1
A2
V
SS
DQ8
DQ9
DQ10
DQ11
V
CC
DQ12
PIN
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
BACK
V
SS
DQ32
DQ33
DQ34
DQ35
V
CC
DQ36
DQ37
DQ38
DQ39
V
SS
DQMB4
DQMB5
V
CC
A3
A4
A5
V
SS
DQ40
DQ41
DQ42
DQ43
V
CC
DQ44
PIN
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
85
87
89
91
93
95
PIN NAMES
A0 鈥?A11
Address Input (Multiplexed)
Select Bank
Data Input/Output
Check Bit (Data-In/Data-Out)
Clock Enable Input
Chip Select Input
Row Address Strobe
Column Address Strobe
Write Enable
DQM
Power Supply (3.3V)
Ground
Serial Data I/O
Serial Clock
Do Not Use
No Connect
BACK
DQ54
DQ55
DQ55
A7
BA0
V
SS
BA1
A11
V
CC
PINOUT
FRONT
DQ13
DQ14
DQ15
V
SS
CB0
CB1
CLK0
V
CC
RAS#
WE#
SO#
NC
NC
V
SS
CB2
CB3
V
CC
DQ16
DQ17
DQ18
DQ19
V
SS
DQ20
DQ21
PIN
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
96
BACK PIN FRONT PIN
DQ45
DQ46
V
SS
CB4
CB5
V
CC
CAS#
NC
NC
NC
CLK1
V
SS
CB6
CB7
V
CC
97
99
103
105
107
111
113
DQ22
DQ23
V
CC
A6
A8
V
SS
A9
A10
V
CC
98
100
102
104
106
108
110
112
114
BA0-1
DQ0-63
CB0-7
CKE0
CS0#
RAS#
CAS#
WE#
DQMB0-7
V
CC
V
SS
SDA
SCL
DNU
NC
DQ47 101
CLK0,CLK1 Clock Input
CKE0 109
115 DQMB2 116 DQMB6
117 DQMB3 118 DQMB7
119
121
123
125
127
129
V
SS
DQ24
DQ25
DQ26
DQ27
V
CC
DQ28
DQ29
DQ30
DQ31
V
SS
SDA
V
CC
120
122
124
126
128
130
132
134
136
138
140
142
144
V
SS
DQ56
DQ57
DQ58
DQ59
V
CC
DQ60
DQ61
DQ62
DQ63
V
SS
SCL
V
CC
DQ48 131
DQ49 133
DQ50 135
DQ51 137
V
SS
139
DQ52 141
DQ53 143
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
June 2003
Rev. 1
1
White Electronic Designs Corporation 鈥?(602) 437-1520 鈥?www.whiteedc.com
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