WED3DG649V75D2 View Datasheet(PDF) - White Electronic Designs Corporation
Part Name
Description
Manufacturer
WED3DG649V75D2 Datasheet PDF : 5 Pages
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White Electronic Designs
WED3DG649V-D2
64MB- 8M x 64 SDRAM UNBUFFERED
FEATURES
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
Programmable Burst Lengths: 1, 2, 4, 8 or Full Page
3.3V ± 0.3v Power Supply
168 pin DIMM JEDEC
DESCRIPTION
The WED3DG649V is a 8M x 64 synchronous DRAM
module which consists of four 8M x 16 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.
*This product is under development, is not qualified or characterized and is subject to
change or cancellation without notice.
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
Pin Front Pin
Front
Pin
Front Pin
Back
Pin
Back
Pin
1
VSS
29
DQM1
57
DQ18
85
VSS
113 DQM5 141
2 DQ0
30
CS0#
58
DQ19
86
DQ32 114
CS1# 142
3 DQ1
31
DNU
59
VCC
87
DQ33 115
RAS# 143
4 DQ2
32
VSS
60
DQ20
88
DQ34 116
VSS
144
5 DQ3
33
A0
61
NC
89
DQ35 117
A1
145
6
VCC
34
A2
62
NC
90
VCC
118
A3
146
7 DQ4
35
A4
63
NC
91
DQ36 119
A5
147
8 DQ5
36
A6
64
VSS
92
DQ37 120
A7
148
9 DQ6
37
A8
65
DQ21
93
DQ38 121
A9
149
10 DQ7
38
A10/AP
66
DQ22
94
DQ39 122
BA0
150
11 DQ8
39
BA1
67
DQ23
95
DQ40 123
A11
151
12
VSS
40
VCC
68
VSS
96
VSS
124
VCC
152
13 DQ9
41
VCC
69
DQ24
97
DQ41 125
NC
153
14 DQ10
42
CK0
70
DQ25
98
DQ42 126
NC
154
15 DQ11
43
VSS
71
DQ26
99
DQ43 127
VSS
155
16 DQ12
44
DNU
72
DQ27 100 DQ44 128
CKE0 156
17 DQ13
45
CS2#
73
VCC
101 DQ45 129
NC
157
18
VCC
46
DQM2
74
DQ28 102
VCC
130 DQM6 158
19 DQ14
47
DQM3
75
DQ29 103 DQ46 131 DQM7 159
20 DQ15
48
DNU
76
DQ30 104 DQ47 132
NC
160
21 NC
49
VCC
77
DQ31 105
NC
133
VCC
161
22 NC
50
NC
78
VSS
106
NC
134
NC
162
23
VSS
51
NC
79
CK2
107
VSS
135
NC
163
24 NC
52
NC
80
NC
108
NC
136
NC
164
25 NC
53
NC
81
*WP
109
NC
137
NC
165
26
VCC
54
VSS
82 **SDA 110
VCC
138
VSS
166
27 WE#
55
DQ16
83
**SCL 111 CAS# 139
DQ48 167
28 DQM0 56
DQ17
84
VCC
112 DQM4 140 DQ49 168
Back
DQ50
DQ51
VCC
DQ52
NC
NC
DNU
VSS
DQ53
DQ54
DQ55
VSS
DQ56
DQ57
DQ58
DQ59
VCC
DQ60
DQ61
DQ62
DQ63
VSS
NC
NC
**SA0
**SA1
**SA2
VCC
PIN NAMES
A0 – A11
Address input (Multiplexed)
BA0-1
Select Bank
DQ0-63
Data Input/Output
CK0,CK2
Clock input
CKE0
Clock Enable input
CS0#,CS2#
Chip select Input
RAS#
Row Address Strobe
CAS#
Column Address Strobe
WE#
Write Enable
DQM0-7#
DQM
VCC
Power Supply (3.3V)
VSS
Ground
SDA
Serial data I/O
SCL
Serial clock
DNU
Do not use
NC
No Connect
* WP (write protect) option available on pin 81,
see ordering information on page 5.
** These pins should be NC in the system which
does not support SPD.
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
June 2003
Rev. 1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
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