W3DG72127V-D2
White Electronic Designs
1GB - 128Mx72 SDRAM REGISTERED and SPD, w/PLL
FEATURES
DESCRIPTION
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Clock speeds of 100MHz and 133MHz
The W3DG72127V is a 128Mx72 synchronous DRAM
module which consists of eighteen 128Mx4 SDRAM
components in TSOP II package, two 18 bit drive ICs
for input control signal 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
Pin ConfigurATIONs (FRONT SIDE/BACK SIDE)
PIN NAMES
A0 – A12
BA0-1
DQ0-63
CB0-7
CLK0
Address input (Multiplexed)
Select Bank
Pin
1
Front
VSS
DQ0
DQ1
DQ2
DQ3
VCC
DQ4
DQ5
DQ6
DQ7
DQ8
VSS
DQ9
DQ10
DQ11
DQ12
DQ13
VCC
Pin
29
30
31
32
33
34
35
36
37
Front
DQM1
CS0#
DNU
VSS
Pin
57
58
59
60
61
62
63
64
65
Front
DQ18
DQ19
VCC
Pin
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
Back
Pin Back Pin
Back
VSS
113 DQM5 141 DQ50
2
DQ32 114 *CS1# 142 DQ51
DQ33 115 RAS# 143
DQ34 116
DQ35 117
VCC
Data Input/Output
Check bit (Data-in/data-out)
Clock input
3
VCC
4
DQ20
NC
VSS
A1
144 DQ52
5
A0
145
NC
CKE0
Clock Enable input
6
A2
*VREF
*CKE1
VSS
DQ21
DQ22
DQ23
VSS
DQ24
DQ25
DQ26
118
A3
146 *VREF
147 REGE
148
CS0#,CS2# Chip select Input
7
A4
DQ36 119
DQ37 120
DQ38 121
DQ39 122
DQ40 123
A5
8
A6
A7
VSS
RAS#
CAS#
WE#
DQM0-7
VCC
Row Address Strobe
Column Address Strobe
Write Enable
DQM
Power Supply (3.3V)
Ground
Power supply for reference
Register Enable
Serial data I/O
Serial clock
Address in EEPROM
Do not use
No Connect
9
A8
A9
149 DQ53
150 DQ54
151 DQ55
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
38 A10/AP 66
BA0
A11
VCC
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
BA1
VCC
VCC
CLK0
VSS
DNU
CS2#
DQM2
DQM3
DNU
VCC
NC
NC
CB2
CB3
VSS
DQ16
DQ17
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
VSS
124
152
VSS
DQ41 125 *CLK1 153 DQ56
VSS
DQ42 126
DQ43 127
*A12
VSS
154 DQ57
155 DQ58
*VREF
REGE
SDA
DQ27 100 DQ44 128 CKE0 156 DQ59
VCC
DQ28 102
101 DQ45 129 *CS3# 157
VCC
VCC
130 DQM6 158 DQ60
SCL
DQ14
DQ15
CB0
CB1
VSS
DQ29 103 DQ46 131 DQM7 159 DQ61
SA0-2
DNU
NC
DQ30 104 DQ47 132
*A13
VCC
NC
160 DQ62
161 DQ63
DQ31 105
CB4
CB5
VSS
NC
NC
VCC
133
134
135
136
137
138
VSS
CLK2
NC
106
107
108
109
162
VSS
NC
163 *CLK3
* These pins are not used in this module.
** These pins should be NC in the system which
does not support SPD.
NC
CB6
CB7
VSS
164
NC
NC
NC
165 **SA0
166 **SA1
VCC
**SDA 110
**SCL 111
WE#
DQM0
CAS# 139 DQ48 167 **SA2
VCC
112 DQM4 140 DQ49 168
VCC
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
January, 2004
Rev. 2
1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com