MT9LD272A Datasheet, PDF (1/30 Pages) Micron Technology – 2, 4 MEG x 72 NONBUFFERED DRAM DIMMs

OBSOLETE
2, 4 MEG x 72
NONBUFFERED DRAM DIMMs
DRAM
MODULE
MT9LD272A(X), MT18LD472A(X)
For the latest data sheet revisions, please refer to the Micron
Web site: www.micron.com/mti/msp/html/datasheet.html
FEATURES
• JEDEC-standard, eight-CAS#, ECC pinout in a 168-pin,
dual in-line memory module (DIMM)
• 16MB (2 Meg x 72) and 32MB (4 Meg x 72)
• Nonbuffered
• High-performance CMOS silicon-gate process
• Single +3.3V ±0.3V power supply
• All inputs, outputs and clocks are TTL-compatible
• Refresh modes: RAS#-ONLY, CAS#-BEFORE-RAS#
(CBR) and HIDDEN
• 2,048-cycle refresh distributed across 32ms
• FAST-PAGE-MODE (FPM) or Extended Data-Out
(EDO) PAGE MODE access cycles
• Serial presence-detect (SPD)
OPTIONS
• Package
168-pin DIMM (gold)
• Timing
50ns access
60ns access
• Access Cycles
FAST PAGE MODE
EDO PAGE MODE
*EDO version only
MARKING
G
-5*
-6
None
X
KEY TIMING PARAMETERS
EDO Operating Mode
SPEED
-5
-6
t_RC
84ns
104ns
t_RAC
50ns
60ns
t_PC
20ns
25ns
t_AA
25ns
30ns
t_CAC
13ns
15ns
t_CAS
8ns
10ns
FPM Operating Mode
SPEED ^tRC
t_RAC
-6 110ns 60ns
t_PC
35ns
t_AA
30ns
t_CAC
15ns
t_RP
40ns
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.
2, 4 Meg x 72 Nonbuffered DRAM DIMMs
DM60.p65 – Rev. 6/98
1
PIN ASSIGNMENT (Front View)
168-Pin DIMM
PIN SYMBOL PIN SYMBOL PIN SYMBOL PIN SYMBOL
1
VSS
43
VSS
85
VSS
127
VSS
2
DQ0
44
OE2# 86 DQ32 128
RFU
3
DQ1
45 RAS2# 87 DQ33 129 NC/RAS3#*
4
DQ2
46 CAS2# 88 DQ34 130 CAS6#
5
DQ3
47 CAS3# 89 DQ35 131 CAS7#
6
VDD
48 WE2# 90
VDD
132
RFU
7
DQ4
49
VDD
91
DQ36 133
VDD
8
DQ5
50
NC
92 DQ37 134
NC
9
DQ6
51
NC
93 DQ38 135
NC
10
DQ7
52
CB2
94 DQ39 136 CB6
11
DQ8
53
CB3
95 DQ40 137 CB7
12
VSS
54
VSS
96
VSS
138
VSS
13
DQ9
55 DQ16 97 DQ41 139 DQ48
14 DQ10 56 DQ17 98 DQ42 140 DQ49
15 DQ11 57 DQ18 99 DQ43 141 DQ50
16 DQ12 58 DQ19 100 DQ44 142 DQ51
17 DQ13 59
VDD
101 DQ45 143
VDD
18
VDD
60
DQ20 102
VDD
144 DQ52
19 DQ14 61
NC
103 DQ46 145
NC
20 DQ15 62
RFU 104 DQ47 146 RFU
21
CB0
63
NC
105 CB4 147
NC
22
CB1
64
VSS
106
CB5
148
VSS
23
VSS
65 DQ21 107
VSS
149 DQ53
24
NC
66 DQ22 108
NC
150 DQ54
25
NC
67 DQ23 109
NC
151 DQ55
26
VDD
68
VSS
110
VDD
152
VSS
27 WE0# 69 DQ24 111 RFU 153 DQ56
28 CAS0# 70 DQ25 112 CAS4# 154 DQ57
29 CAS1# 71 DQ26 113 CAS5# 155 DQ58
30 RAS0# 72 DQ27 114
NC
156 DQ59
31 OE0# 73
VDD
115
RFU
157
VDD
32
VSS
74 DQ28 116
VSS
158 DQ60
33
A0
75 DQ29 117
A1
159 DQ61
34
A2
76 DQ30 118
A3
160 DQ62
35
A4
77 DQ31 119
A5
161 DQ63
36
A6
78
VSS
120
A7
162
VSS
37
A8
79
NC
121
A9
163
NC
38
A10
80
NC
122 NC (A11) 164
NC
39 NC (A12) 81
NC
123 NC (A13) 165 SA0
40
VDD
82
SDA
124
VDD
166
SA1
41
VDD
83
SCL 125 RFU 167 SA2
42
RFU
84
VDD
126
RFU
168
VDD
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©1998, Micron Technology, Inc.