W3DG7234V-D2 Datasheet, PDF (1/6 Pages) White Electronic Designs Corporation – 256MB- 32Mx72 SDRAM UNBUFFERED

White Electronic Designs
W3DG7234V-D2
PRELIMINARY*
256MB- 32Mx72 SDRAM UNBUFFERED
FEATURES
DESCRIPTION
PC1000 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: 2, 3, 4, 8 or Full
Page
JEDEC standard 168 pin DIMM package
Power supply: 3.3V ± 0.3V
The W3DG7234V is organized as a 2x16Mx72 synchronous
DRAM module which consists of eighteen 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.
* This product is under development, is not qualified or characterized and is subject to
change without notice.
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
Pin Front Pin
1
VSS
29
2 DQ0 30
3 DQ1 31
4 DQ2 32
5 DQ3 33
6 VCC
34
7 DQ4 35
8 DQ5 36
9 DQ6 37
10 DQ7 38
11 DQ8 39
12 VSS
40
13 DQ9 41
14 DQ10 42
15 DQ11 43
16 DQ12 44
17 DQ13 45
18 VCC
46
19 DQ14 47
20 DQ15 48
21 CB0 49
22 CB1 50
23 VSS
51
24 NC 52
25 NC 53
26 VCC
54
27 WE# 55
28 DQM0 56
Front
DQM1
CS0#
DNU
VSS
A0
A2
A4
A6
A8
A10/AP
BA1
VCC
VCC
CK0
VSS
DNU
CS2#
DQM2
DQM3
DNU
VCC
NC
NC
CB2
CB3
VSS
DQ16
DQ17
Pin Front Pin Back Pin
57 DQ18 85 VSS 113
58 DQ19 86 DQ32 114
59 VCC 87 DQ33 115
60 DQ20 88 DQ34 116
61 NC 89 DQ35 117
62
NC
90
VCC 118
63 CKE1 91 DQ36 119
64
VSS
92 DQ37 120
65 DQ21 93 DQ38 121
66 DQ22 94 DQ39 122
67 DQ23 95 DQ40 123
68
VSS
96
VSS 124
69 DQ24 97 DQ41 125
70 DQ25 98 DQ42 126
71 DQ26 99 DQ43 127
72 DQ27 100 DQ44 128
73 VCC 101 DQ45 129
74 DQ28 102 VCC 130
75 DQ29 103 DQ46 131
76 DQ30 104 DQ47 132
77 DQ31 105 CB4 133
78 VSS 106 CB5 134
79 CK2 107 VSS 135
80 NC 108 NC 136
81 NC 109 NC 137
82 **SDA 110 VCC 138
83 **SCL 111 CAS# 139
84 VCC 112 DQM4 140
Back Pin Back
DQM5 141 DQ50
CS1# 142 DQ51
RAS# 143 VCC
VSS 144 DQ52
A1 145 NC
A3 146 NC
A5 147 NC
A7
148 VSS
A9 149 DQ53
BA0 150 DQ54
A11 151 DQ55
VCC 152 VSS
CK1 153 DQ56
NC 154 DQ57
VSS 155 DQ58
CKE0 156 DQ59
CS3# 157 VCC
DQM6 158 DQ60
DQM7 159 DQ61
NC 160 DQ62
VCC 161 DQ63
NC 162 VSS
NC 163 CK3
CB6 164 NC
CB7 165 **SA0
VSS 166 **SA1
DQ48 167 **SA2
DQ49 168 VCC
PIN NAMES
A0 – A11
BA0-1
DQ0-63
CB0-7
CK0-CK3
CKE0,CKE1
CS0#-CS3#
RAS#
CAS#
WE#
DQM0-7
VCC
VSS
SDA
SCL
SA0-2
DNU
NC
Address Input (Multiplexed)
Select Bank
Data Input/Output
Check Bit (data-in/data-out)
Clock Input
Clock Enable Input
Chip Select Input
Row Address Strobe
Column Address Strobe
Write Enable
DQM
Power Supply (3.3V)
Ground
Serial Data I/O
Serial Clock
Address in EEPROM
Do Not Use
No Connect
** 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, 2004
Rev. 1
1
White Electronic Designs Corporation • [phone] • www.wedc.com