WED3DG6435V-D1
-JD1
White Electronic Designs
256MB – 32Mx64 SDRAM UNBUFFERED
FEATURES
DESCRIPTION
The WED3DG6435V is a 32Mx64 synchronous DRAM
module which consists of eight 32Mx8 SDRAM components
in TSOP II package, and one 2Kb EEPROM in an 8
pin TSOP package for Serial Presence Detect which
are mounted on a 144 pin SO-DIMM multilayer FR4
Substrate.
PC100 and PC133 compatible
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
* This product is subject to change without notice.
Programmable Burst Lengths: 1, 2, 4, 8 or Full Page
3.3V ±0.3V Power Supply
NOTE: Consult factory for availability of:
• RoHS compliant products
• Vendor source control options
• Industrial temperature option
144 Pin SO-DIMM JEDEC
• Package height Option:
JD1: 31.75mm (1.25”)
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
PIN NAMES
PINOUT
A0 – A12
BA0-1
DQ0-63
CK0, CK1
CKE0
CS0
Address Input (Multiplexed)
Select Bank
PIN FRONT PIN
BACK
VSS
PIN FRONT PIN
BACK
DQ45
DQ46
DQ47
VSS
PIN
97
BACK
DQ22
DQ23
VCC
PIN
98
BACK
DQ54
DQ55
VCC
1
VSS
DQ0
DQ1
DQ2
DQ3
VCC
2
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
85
87
89
91
93
95
DQ13
DQ14
DQ15
VSS
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
96
Data Input/Output
Clock Input
3
4
DQ32
DQ33
DQ34
DQ35
VCC
99
100
102
104
106
108
110
112
114
116
118
120
122
124
126
128
130
132
134
136
138
140
142
144
5
6
101
103
105
107
109
111
113
115
117
119
121
123
125
127
129
131
133
135
137
139
141
143
7
8
A6
A7
Clock Enable Input
Chip Select Input
Row Address Strobe
Column Address Strobe
Write Enable
9
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
NC
NC
A8
BA0
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
NC
NC
VSS
VSS
RAS#
CAS#
WE#
DQ4
DQ5
DQ6
DQ7
VSS
DQ36
DQ37
DQ38
DQ39
VSS
CK0
VCC
CKE0
VCC
A9
BA1
A10
A11
RAS#
WE#
CS0#
NC
CAS#
NC
VCC
VCC
DQMB2
DQMB3
VSS
DQMB6
DQMB7
VSS
DQMB0-7
VCC
DQM
A12
Power Supply (3.3V)
Ground
DQMB0
DQMB1
VCC
DQMB4
DQMB5
VCC
NC
NC
CK1
VSS
DQ24
DQ25
DQ26
DQ27
VCC
DQ56
DQ57
DQ58
DQ59
VCC
VSS
VSS
SDA
Serial Data I/O
Serial Clock
A0
A3
NC
NC
SCL
A1
A4
NC
NC
DNU
Do Not Use
A2
A5
VCC
VCC
VSS
VSS
DQ16
DQ17
DQ18
DQ19
VSS
DQ48
DQ49
DQ50
DQ51
VSS
DQ28
DQ29
DQ30
DQ31
VSS
DQ60
DQ61
DQ62
DQ63
VSS
NC
No Connect
DQ8
DQ9
DQ10
DQ11
VCC
DQ40
DQ41
DQ42
DQ43
VCC
** These pins should be NC in the system which
does not support SPD.
DQ20
DQ21
DQ52
DQ53
SDA
VCC
SCL
DQ12
DQ44
VCC
May 2007
Rev. 7
1
White Electronic Designs Corporation • (602) 437-1520 • www.whiteedc.com