W3DG6434V-D2
White Electronic Designs
256MB – 2x16Mx64 SDRAM UNBUFFERED
FEATURES
DESCRIPTION
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PC100 and PC133 compatible
The W3DG6434V is a 2x16Mx64 synchronous DRAM
module which consists of sixteen 16Mx8 SDRAM
components in TSOP II 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.
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
168 pin DIMM JEDEC
NOTE: Consult factory for availability of:
• Lead-Free or RoHS Products
• Vendor source control options
• Industrial temperature option
PIN NAMES
Address input (Multiplexed)
Select Bank
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
A0 – A11
BA0-1
DQ0-63
CK0-CK3
PIN
1
2
3
4
5
6
7
8
FRONT
VSS
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
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
VCC
PIN
85
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
138
139
140
BACK
DQM5
CS1#
RAS#
VSS
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
166
167
168
BACK
DQ50
DQ51
VCC
Data Input/Output
Clock input
CKE0,CKE1 Clock Enable input
DQ0
DQ1
DQ2
DQ3
VCC
DQ4
DQ5
DQ6
DQ7
DQ8
VSS
86
87
88
89
90
91
92
93
DQ32
DQ33
DQ34
DQ35
VCC
DQ36
DQ37
DQ38
DQ39
DQ40
VSS
DQ20
NC
*VREF
CKE1
VSS
DQ21
DQ22
DQ23
VSS
DQ52
NC
*VREF
DNU
VSS
DQ53
DQ54
DQ55
VSS
CS0#-CS3#
RAS#
CAS#
WE#
DQM0-7#
VCC
VSS
SDA
SCL
DNU
Chip select Input
Row Address Strobe
Column Address Strobe
Write Enable
DQM
Power Supply (3.3V)
Ground
Serial data I/O
Serial clock
A0
A2
A4
A6
A1
A3
A5
A7
A9
BA0
A11
9
A8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
A10/AP
BA1
VCC
94
95
96
VCC
DQ9
DQ10
DQ11
DQ12
DQ13
VCC
DQ14
DQ15
*CB0
*CB1
VSS
NC
NC
VCC
WE#
DQM0
VCC
CK0
VSS
DNU
CS2#
DQM2
DQM3
DNU
VCC
DQ24
DQ25
DQ26
DQ27
VCC
DQ28
DQ29
DQ30
DQ31
VSS
CK2
NC
WP***
**SDA
**SCL
VCC
97
98
99
DQ41
DQ42
DQ43
DQ44
DQ45
VCC
DQ46
DQ47
*CB4
*CB5
VSS
NC
NC
VCC
CAS#
DQM4
CK1
*A12
VSS
CKE0
CS3#
DQM6
DQM7
*A13
VCC
DQ56
DQ57
DQ58
DQ59
VCC
DQ60
DQ61
DQ62
DQ63
VSS
Do not use
No Connect
Write Protect
NC
WP
100
101
102
103
104
105
106
107
108
109
110
111
112
* These pins are not used in this module.
** These pins should be NC in the system
which does not support SPD.
*** WP available on the W3DG6334V-D2.
NC
NC
NC
NC
CK3
*CB2
*CB3
VSS
DQ16
DQ17
*CB6
*CB7
VSS
DQ48
DQ49
NC
**SA0
**SA1
**SA2
VCC
July 2004
Rev 1
1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com