W3DG6433V-D1
White Electronic Designs
PRELIMINARY*
256MB - 32Mx64 SDRAM, UNBUFFERED
FEATURES
DESCRIPTION
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Burst Mode Operation
The W3DG6433V is a 32Mx64 synchronous DRAM module
which consists of four 32Mx16 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.
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
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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
* This product is under development, is not qualified or characterized and is subject to
change without notice.
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
PIN NAMES
PINOUT
A0 – A12
BA0-1
DQ0-63
CLK0
CKE0
CS0#
RAS#
CAS#
WE#
Address Input (Multiplexed)
PIN FRONT PIN
BACK
VSS
PIN FRONT PIN
BACK
DQ45
DQ46
DQ47
VSS
NC
NC
CKE0
VCC
CAS#
NC
A12
NC
NC
VSS
NC
NC
VCC
PIN
97
99
BACK
DQ22
DQ23
VCC
A6
A8
PIN
98
BACK
DQ54
DQ55
VCC
A7
BA0
VSS
BA1
A11
VCC
DQMB6
DQMB7
VSS
DQ56
DQ57
DQ58
DQ59
VCC
DQ60
DQ61
DQ62
DQ63
VSS
Select Bank
1
3
5
7
VSS
DQ0
DQ1
DQ2
DQ3
VCC
2
4
6
8
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
NC
NC
CLK0
VCC
RAS#
WE#
CS0#
NC
DNU
VSS
NC
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
DQ32
DQ33
DQ34
DQ35
VCC
DQ36
DQ37
DQ38
DQ39
VSS
DQMB4
DQMB5
VCC
A3
A4
100
102
104
106
108
110
112
114
116
118
120
122
124
126
128
130
132
134
136
138
140
142
144
101
103
105
107
109
111
113
115
117
119
121
123
125
127
129
131
133
135
137
139
141
143
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
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
VSS
A9
DQ4
DQ5
DQ6
DQ7
VSS
DQMB0
DQMB1
VCC
A0
A1
A2
VSS
DQ8
DQ9
DQ10
DQ11
VCC
A10/AP
VCC
DQMB2
DQMB3
VSS
DQ24
DQ25
DQ26
DQ27
VCC
DQ28
DQ29
DQ30
DQ31
VSS
DQMB0-7
VCC
DQM
Power Supply (3.3V)
Ground
VSS
SDA
Serial Data I/O
Serial Clock
SCL
NC
VCC
DNU
Do Not Use
A5
VSS
DQ16
DQ17
DQ18
DQ19
VSS
DQ48
DQ49
DQ50
DQ51
VSS
NC
No Connect
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**
VCC
DQ12
DQ44
June 2004
Rev. 1
1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com