8, 16, 32 MEG x 64
NONBUFFERED DRAM DIMMs
MT8LD864A X, MT16LD1664A X,
MT32LD3264A X
For the latest data sheet, please refer to the Micron Web
site: www.micronsemi.com/datasheets/datasheet.html
DRAM
MODULE
FEATURES
PIN ASSIGNMENT (Fro n t Vie w )
168-Pin DIMM
• Eight-CAS# ECC pinout in a 168-pin, dual in-line
memory module (DIMM)
(H-14; 64MB)
(H-17; 128MB)
• 64MB (8 Meg x 64), 128MB (16 Meg x 64), and
256MB (32 Meg x 64)
• Nonbuffered
(H-30; 256MB)
• High-performance CMOS silicon-gate process
• Single +3.3V ±±.3V poꢀer supply
• All inputs, outputs and clocks are LVTTL-
compatible
• 4,±96-cycle CAS#-BEFORE-RAS# (CBR) refresh
distributed across 64ms
• Extended Data-Out (EDO) PAGE MODE access cycle
• Serial presence-detect (SPD)
PIN SYMBOL PIN SYMBOL PIN SYMBOL PIN SYMBOL
1
VSS
DQ0
DQ1
DQ2
DQ3
VDD
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
VSS
OE2#
RAS2#
CAS2#
CAS3#
WE2#
VDD
85
86
VSS
DQ32
DQ33
DQ34
DQ35
VDD
127
128
VSS
2
RFU
3
87
129 NC/RAS3#**
4
5
6
7
8
9
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
CAS6#
CAS7#
RFU
VDD
NC
NC
NC
NC
VSS
DQ48
DQ49
DQ50
DQ51
VDD
DQ52
NC
RFU
NC
OPTIONS
• Package
MARKING
DQ4
DQ5
DQ6
DQ7
DQ8
VSS
DQ9
DQ10
DQ11
DQ12
DQ13
VDD
DQ14
DQ15
NC
NC
VSS
NC
NC
VDD
WE0#
CAS0#
CAS1#
RAS0#
OE0#
VSS
DQ36
DQ37
DQ38
DQ39
DQ40
VSS
DQ41
DQ42
DQ43
DQ44
DQ45
VDD
DQ46
DQ47
NC
NC
VSS
NC
NC
NC
NC
168-pin DIMM (gold)
G
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
• Timing
5±ns access
6±ns access
-5
-6
VSS
DQ16
DQ17
DQ18
DQ19
VDD
DQ20
NC
RFU
NC
• Access Cycle
EDO PAGE MODE
X
KEY TIMING PARAMETERS
t
t
t
t
t
t
SPEED
-5
-6
RC
RAC
PC
AA
CAC
CAS
8ns
VSS
VSS
84ns
104ns
50ns
60ns
20ns
25ns
25ns
30ns
13ns
15ns
DQ21
DQ22
DQ23
VSS
DQ24
DQ25
DQ26
DQ27
VDD
DQ28
DQ29
DQ30
DQ31
VSS
DQ53
DQ54
DQ55
VSS
DQ56
DQ57
DQ58
DQ59
VDD
DQ60
DQ61
DQ62
DQ63
VSS
NC
NC
VDD
RFU
CAS4#
CAS5#
10ns
PART NUMBERS
PARTNUMBER
CONFIGURATION
8 Meg x 64
SPEED
114 NC/RAS1#** 156
MT8LD864AG-5X
MT8LD864AG-6X
MT16LD1664AG-5X
MT16LD1664AG-6X
MT32LD3264AG-5X*
MT32LD3264AG-6X*
50ns
60ns
50ns
60ns
50ns
60ns
115
116
117
118
119
120
121
122
RFU
VSS
A1
A3
A5
A7
A9
A11
157
158
159
160
161
162
163
164
8 Meg x 64
16 Meg x 64
16 Meg x 64
32 Meg x 64
32 Meg x 64
A0
A2
A4
A6
A8
A10
NC
NC
NC
NC
39 NC (A12) 81
NC
SDA
SCL
123 NC (A13) 165
SA0
SA1
SA2
VDD
*Contact factory for availability
40
41
42
VDD
VDD
RFU
82
83
84
124
125
126
VDD
RFU
RFU
166
167
168
NOTE: Pin symbols in parentheses are not used on these modules but
may be used for other modules in this product family. They are
for reference only.
VDD
**256MBversiononly
8, 16, 32 Meg x 64 Nonbuffered DRAM DIMMs
DM78.p65 – Rev. 2/99
MicronTechnology,Inc.,reservestherighttochangeproductsorspecificationswithoutnotice.
©1999,MicronTechnology,Inc.
1
Micron is a registered trademark of Micron Technology, Inc.