WED3DG6435V-D1
White Electronic Designs
256MB- 32Mx64 SDRAM UNBUFFERED
DESCRIPTION
FEATURES
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PC100 and PC133 compatible
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 TSSOP package for Serial Presence Detect
which are mounted on a 144 pin SO-DIMM multilayer
FR4 Substrate.
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.
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Programmable Burst Lengths: 1, 2, 4, 8 or Full Page
3.3V ± 0.3V Power Supply
144 Pin SO-DIMM JEDEC
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
PIN NAMES
PINOUT
A0 – A12
BA0-1
DQ0-63
CK0,CK1
CKE0
CS0#
RAS#
CAS#
WE#
Address Input (Multiplexed)
Select Bank
PIN FRONT PIN
BACK
VSS
PIN FRONT PIN
BACK
DQ46
DQ47
VSS
PIN
95
BACK
DQ21
DQ22
DQ23
VCC
PIN
96
BACK
DQ53
DQ54
DQ55
VCC
1
VSS
DQ0
DQ1
DQ2
DQ3
VCC
2
51
53
55
57
59
DQ14
DQ15
VSS
52
54
56
58
60
Data Input/Output
Clock Input
3
4
DQ32
DQ33
DQ34
DQ35
VCC
97
98
5
6
99
100
102
104
106
108
110
7
8
NC
NC
101
103
105
107
109
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
50
NC
NC
A6
A7
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
A8
BA0
DQ4
DQ5
DQ6
DQ7
VSS
DQ36
DQ37
DQ38
DQ39
VSS
VSS
VSS
VOLTAGE KEY
A9
BA1
61
63
65
67
69
71
73
75
77
79
81
83
85
87
89
91
93
CK0
VCC
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
CKE0
VCC
111 A10/AP 112
A11
113
115
117
119
121
123
125
127
129
131
133
135
137
139
141
143
VCC
DQM2
DQM3
VSS
114
116
118
120
122
124
126
128
130
132
134
136
138
140
142
144
VCC
DQM0-7
VCC
DQM
RAS#
WE#
CS0#
NC
CAS#
NC
DQM6
DQM7
VSS
Power Supply (3.3V)
Ground
DQM0
DQM1
VCC
DQM4
DQM5
VCC
VSS
A12
SDA
Serial Data I/O
Serial Clock
NC
DQ24
DQ25
DQ26
DQ27
VCC
DQ56
DQ57
DQ58
DQ59
VCC
A0
A3
DNU
VSS
CK1
VSS
SCL
A1
A4
DNU
Do Not Use
A2
A5
NC
NC
NC
No Connect
VSS
VSS
NC
NC
** These pins should be NC in the system which
does not support SPD.
DQ8
DQ9
DQ10
DQ11
VCC
DQ40
DQ41
DQ42
DQ43
VCC
VCC
VCC
DQ28
DQ29
DQ30
DQ31
VSS
DQ60
DQ61
DQ62
DQ63
VSS
DQ16
DQ17
DQ18
DQ19
VSS
DQ48
DQ49
DQ50
DQ51
VSS
DQ12
DQ13
DQ44
DQ45
**SDA
VCC
**SCL
VCC
DQ20
DQ52
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
June 2003
1
White Electronic Designs Corporation • (602) 437-1520 • www.whiteedc.com
Rev. 1