W3DG644V-D2 Datasheet, PDF (1/6 Pages) White Electronic Designs Corporation – 32MB - 4M x 64 SDRAM UNBUFFERED

White Electronic Designs
W3DG644V-D2
PRELIMINARY*
32MB - 4M 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 W3DG644V is a 4M x 64 synchronous DRAM module
which consists of four 4M 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 without notice.
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
PIN FRONT PIN FRONT PIN FRONT PIN BACK PIN BACK PIN BACK
1 VSS 29 DQM1 57 DQ18 85 VSS 113 DQM5 141 DQ50
2 DQ0 30 CS0# 58 DQ19 86 DQ32 114 CS1# 142 DQ51
3 DQ1 31
DNU
59
VCC
87 DQ33 115 RAS# 143 VCC
4 DQ2 32
VSS
60 DQ20 88 DQ34 116 VSS 144 DQ52
5 DQ3 33
A0
61 NC 89 DQ35 117 A1 145 NC
6 VCC
34
A2
62
NC
90
VCC 118
A3
146 NC
7 DQ4 35
A4
63 NC 91 DQ36 119 A5 147 DNU
8 DQ5 36
A6
64
VSS
92 DQ37 120
A7
148 VSS
9 DQ6 37
A8
65 DQ21 93 DQ38 121 A9 149 DQ53
10 DQ7 38 A10/AP 66 DQ22 94 DQ39 122 BA0 150 DQ54
11 DQ8 39
BA1
67 DQ23 95 DQ40 123 A11 151 DQ55
12 VSS
40
VCC
68
VSS
96
VSS 124
VCC 152 VSS
13 DQ9 41
VCC
69 DQ24 97 DQ41 125 NC 153 DQ56
14 DQ10 42 CLK0 70 DQ25 98 DQ42 126 NC 154 DQ57
15 DQ11 43
VSS
71 DQ26 99 DQ43 127 VSS 155 DQ58
16 DQ12 44
DNU
72 DQ27 100 DQ44 128 CKE0 156 DQ59
17 DQ13 45 CS2# 73 VCC 101 DQ45 129 NC 157 VCC
18 VCC 46 DQM2 74 DQ28 102 VCC 130 DQM6 158 DQ60
19 DQ14 47 DQM3 75 DQ29 103 DQ46 131 DQM7 159 DQ61
20 DQ15 48
DNU
76 DQ30 104 DQ47 132 NC 160 DQ62
21 NC 49
VCC
77 DQ31 105 NC 133 VCC 161 DQ63
22 NC 50
NC
78
VSS 106
NC
134
NC
162 VSS
23 VSS
51
NC
79 CLK2 107 VSS 135 NC 163 NC
24 NC 52
NC
80 NC 108 NC 136 NC 164 NC
25 NC 53
NC
81 *WP 109 NC 137 NC 165 **SA0
26 VCC
54
VSS
82 **SDA 110 VCC 138 VSS 166 **SA1
27 WE# 55 DQ16 83 **SCL 111 CAS# 139 DQ48 167 **SA2
28 DQM0 56 DQ17 84 VCC 112 DQM4 140 DQ49 168 VCC
PIN NAMES
A0 – A11
BA0-1
DQ0-63
CLK0,CLK2
CKE0
CS0#,CS2#
RAS#
CAS#
WE#
DQM0-7#
VCC
VSS
SDA
SCL
DNU
NC
Address input (Multiplexed)
Select Bank
Data Input/Output
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
Do not use
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.
July 2004
Rev 1
1
White Electronic Designs Corporation • [phone] • www.wedc.com