WED3DG72128V-D1
White Electronic Designs
PRELIMINARY*
1GB- 128Mx72 SDRAM, UNBUFFERED W/PLL
FEATURES
DESCRIPTION
The WED3DG72128V is a 128Mx72 synchronous DRAM
module which consists of nine 128Mx8 stack 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.
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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
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Programmable Burst Lengths: 1, 2, 4, 8 or Full Page
3.3V ± 0.3V Power Supply
* This product is under development, is not qualified or characterized and is subject to
change without notice.
144 Pin SO-DIMM JEDEC
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
PINOUT
PIN NAMES
A0 – A12
BA0-1
Address Input (Multiplexed)
PIN
FRONT
PIN
BACK
PIN FRONT PIN BACK PIN FRONT PIN BACK
Select Bank
1
VSS
2
VSS
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
DQ45 97 DQ22
98
DQ54
DQ0-63
CLK0
Data Input/Output
Clock Input
3
DQ
4
DQ32
DQ33
DQ34
DQ35
VCC
DQ46 99 DQ23 100 DQ55
5
DQ1
DQ2
DQ3
VCC
6
DQ47 101
VSS 103
VCC
A6
102
104
106
108
110
112
114
VCC
A7
CB0-7
Check Bit (Data-In/Data-Out)
7
8
CKE0, CKE1 Clock Enable Input
CS0#, CS1# ChipSelect Input
9
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
CB0
CB4 105
CB5 107
CKE0 109
A8
BA0
VSS
BA1
A11
VCC
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
CB1
VSS
A9
RAS#
CAS#
WE#
DQM0-7
VCC
Row Address Strobe
Column Address Strobe
Write Enable
DQM
DQ4
DQ5
DQ6
DQ7
VSS
DQ36
DQ37
DQ38
DQ39
VSS
CLK0
VCC
VCC
111
A10
VCC
RAS#
WE#
CAS# 113
CKE1 115 DQMB2 116 DQMB6
A12 117 DQMB3 118 DQMB7
Power Supply (3.3V)
Ground
S0#
VSS
DQMB0
DQMB1
VCC
DQMB4
DQMB5
VCC
S1#
NC
NC
NC
VSS
119
VSS
120
VSS
SDA
SCL
Serial Data I/O
Serial Clock
121 DQ24 122 DQ56
123 DQ25 124 DQ57
VSS
DNU
NC
Do Not Use
A0
A3
CB2
CB6 125 DQ26 126 DQ58
CB7 127 DQ27 128 DQ59
No Connect
A1
A4
CB3
*
These pins are not used in this module.
** These pins should be NC in the system which
does not support SPD.
A2
A5
VCC
VCC 129
VCC
130
VCC
VSS
VSS
DQ16
DQ17
DQ18
DQ19
VSS
DQ48 131 DQ28 132 DQ60
DQ49 133 DQ29 134 DQ61
DQ50 135 DQ30 136 DQ62
DQ51 137 DQ31 138 DQ63
DQ8
DQ9
DQ10
DQ11
VCC
DQ40
DQ41
DQ42
DQ43
VCC
VSS
DQ52 141 SDA
DQ53 143 VCC
139
VSS
140
142
144
VSS
SCL
VCC
DQ20
DQ21
DQ12
DQ44
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
October 2002
Rev. 0
1
White Electronic Designs Corporation • (602) 437-1520 • www.whiteedc.com