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WED3DG649V-D2 fiches techniques PDF

White Electronic Designs Corporation - 64MB- 8M x 64 SDRAM UNBUFFERED

Numéro de référence WED3DG649V-D2
Description 64MB- 8M x 64 SDRAM UNBUFFERED
Fabricant White Electronic Designs Corporation 
Logo White Electronic Designs Corporation 





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WED3DG649V-D2 fiche technique
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
www.DataSheet.in

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