SM4M64ALDT-6 Enhanced Memory Systems, Inc., SM4M64ALDT-6 Datasheet

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SM4M64ALDT-6

Manufacturer Part Number
SM4M64ALDT-6
Description
168-pin Low Profile ESDRAM DIMM
Manufacturer
Enhanced Memory Systems, Inc.
Datasheet
Preliminary Data Sheet
Features
Description
The Enhanced SDRAM (ESDRAM) DIMMs are low
latency, high performance memory modules of 32, 64, and
128 MByte capacities, and are organized x64 or x72 bits
wide. These DIMMs are 100% pin, function, and timing
compatible with JEDEC standard 168-pin SDRAM DIMMs.
The 32 MByte and 64 MByte DIMMs employ a single
physical bank of memory while the 128 MByte DIMMs are
built as two physical banks. Within each physical bank of
memory are four logical banks, which are accessed through
the use of BA0 and BA1 (pins 122 and 39). All control,
access, and data input signals are registered into each of the
ESDRAM components through use of an external clock,
CK0-CK3.
ESDRAM
performance up to 66 MHz and nearly the same at bus
speeds up to 166 MHz. This performance is achieved using
JEDEC superset features including early auto-precharge and
pipelined row activation. The ESDRAM also supports
hidden auto-refresh.
All ESDRAM DIMMs operate from a 3.3V power supply,
and all inputs and outputs are LVTTL compatible. The
DIMM has a low 1.15-inch height to support IU rack mount
system requirements. See the ESDRAM component data
sheet for a more detailed discussion of ESDRAM
specifications and functional operation.
Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921
PHONE: (800) 545-DRAM; FAX: (719) 488-9095;
Revision 1.0
JEDEC Standard 168-pin SDRAM DIMM
Low Latency 166 MHz Modules (2:2:2)
Sustained Random Burst Reads (same bank access)
Early Auto-Precharge and Pipelined Row Activation
Hidden Auto-Refresh (4K, 64ms)
Fully Synchronous Operation
On-board Serial Presence Detect (SPD)
Unbuffered 168-pin DIMM
Single 3.3V
Low Profile for IU Rack Mount Systems
CAS Latency = 2
RAS to CAS Delay = 2
Precharge Delay = 2
1-1-1-1 at 66MHz (CL = 1)
2-1-1-1 at 166MHz (CL = 2)
DIMMs
0.3V Power Supply
provide
pipeline
http://www.edram.com
burst
SRAM
Pin
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
39
40
41
42
1
2
3
4
5
6
7
8
9
Symbol
DQMB0
DQMB1
A10/AP
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
WE#
DNU
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
CB0
CB1
BA1
CK0
Vdd
Vdd
Vdd
S0#
Vdd
Vdd
Vss
Vss
Vss
Vss
NC
NC
A0
A2
A4
A6
A8
The information contained herein is subject to change without notice.
168-pin Low Profile ESDRAM DIMMs
Pin
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
81
82
83
84
Symbol
DQMB2
DQMB3
DQ16
DQ17
DQ18
DQ19
DQ20
CKE1
DQ21
DQ22
DQ23
DQ24
DQ25
DQ26
DQ27
DQ28
DQ29
DQ30
DQ31
DNU
DNU
SDA
CB2
CB3
CK2
SCL
Vss
S2#
Vdd
Vss
Vdd
Vss
Vdd
Vss
Vdd
Vss
WP
NC
NC
NC
NC
NC
2001 Enhanced Memory Systems. All rights reserved.
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
Pin
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
32MB, 64MB, 128MB
Symbol
DQMB4
DQMB5
DQ32
DQ33
DQ34
DQ35
DQ36
DQ37
DQ38
DQ39
DQ40
DQ41
DQ42
DQ43
DQ44
DQ45
DQ46
DQ47
CAS#
RAS#
CB4
CK1
RFU
CB5
BA0
Vss
Vdd
Vss
Vdd
Vss
Vdd
S1#
Vss
A11
Vdd
NC
NC
A1
A3
A5
A7
A9
Pin
127
128
129
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
156
157
158
159
160
161
162
163
164
165
166
167
168
Page 1 of 15
Symbol
DQMB6
DQMB7
CKE0
DQ48
DQ49
DQ50
DQ51
DQ52
DQ53
DQ54
DQ55
DQ56
DQ57
DQ58
DQ59
DQ60
DQ61
DQ62
DQ63
RFU
CB6
CB7
CK3
S3#
Vdd
Vdd
Vdd
SA0
SA1
SA2
Vdd
Vss
Vss
Vss
Vss
Vss
NC
NC
NC
NC
NC
NC

Related parts for SM4M64ALDT-6

SM4M64ALDT-6 Summary of contents

Page 1

Preliminary Data Sheet Features JEDEC Standard 168-pin SDRAM DIMM Low Latency 166 MHz Modules (2:2:2) CAS Latency = 2 RAS to CAS Delay = 2 Precharge Delay = 2 Sustained Random Burst Reads (same bank access) 1-1-1-1 at 66MHz (CL ...

Page 2

Low profile ESDRAM DIMMs 32MB, 64MB, 128MB Pin Descriptions Symbol Type CK(0:3) Input Clocks: All SDRAM input signals are sampled on the positive edge of CK. CKE(0:1) Input Clock Enables: CKE activate (high) or deactivate (low) the CK signals. ...

Page 3

... Preliminary Data Sheet 32MB DIMM Functional Block Diagram – SM4M64ALDT S0# DQMB0 DQMB1 DQ(15:0) DQMB4 DQMB5 DQ(47:32) S2# DQMB2 DQMB3 DQ(31:16) DQMB6 DQMB7 DQ(63:48) Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921 PHONE: (800) 545-DRAM; FAX: (719) 488-9095; Revision 1 http://www.edram.com 168-pin Low Profile ESDRAM DIMMs ...

Page 4

Low profile ESDRAM DIMMs 32MB, 64MB, 128MB 64MB DIMM Functional Block Diagram – SM8M64ALDT S0# DQMB0 U0 DQ(7:0) DQMB1 U1 DQ(15:8) S2# DQMB2 U2 DQ(23:16) DQMB3 U3 DQ(31:24) Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921 ...

Page 5

Preliminary Data Sheet 64MB ECC DIMM Functional Block Diagram – SM8M72ALDT S0# DQMB0 U0 DQ(7:0) DQMB1 U1 DQ(15:8) U2 CB(7:0) S2# DQMB2 U3 DQ(23:16) DQMB3 U4 DQ(31:24) Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921 PHONE: (800) ...

Page 6

Low profile ESDRAM DIMMs 32MB, 64MB, 128MB 128MB DIMM Functional Block Diagram – SM16M64ALDT S0# S1# DQMB0 U0 DQ(7:0) DQMB1 U1 DQ(15:8) S2# S3# DQMB2 U2 DQ(23:16) DQMB3 U3 DQ(31:24) Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, ...

Page 7

Preliminary Data Sheet 128MB ECC DIMM Functional Block Diagram – SM16M72ALDT S0# S1# DQMB0 U0 DQ(7:0) DQMB1 U1 DQ(15:8) U2 DQ(15:8) S2# S3# DQMB2 U3 DQ(23:16) DQMB3 U4 DQ(31:24) Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921 ...

Page 8

Low profile ESDRAM DIMMs 32MB, 64MB, 128MB Electrical Characteristics Absolute Maximum Ratings Description Power Supply Voltage Voltage on any Pin with Respect to Ground Operating Temperature (ambient) Storage Temperature Power Dissipation DC Output Current (I/O pins) Stresses greater than ...

Page 9

Preliminary Data Sheet AC Characteristics ( initial pause of 200 s is required after power-up, then a Precharge All Banks command must be given followed by a minimum of eight Auto ...

Page 10

Low profile ESDRAM DIMMs 32MB, 64MB, 128MB AC Operating Conditions (T Clock and Clock Enable Parameters Symbol Parameter t Clock Cycle Time CK2 t Clock Cycle Time CK1 Clock ...

Page 11

Preliminary Data Sheet Read and Write Parameters Symbol Parameter t Clock Access Time AC3 t Clock Access Time AC2 t Clock Access Time AC1 t Data Output Hold Time (CL=3) OH3 ...

Page 12

... ESDRAM defined for Code=01 1.2 non-ECC - - ECC Enhanced Memory Systems - - x64 SM4M64ALDT SM8M64ALDT x72 SM8M72ALDT - yyww code serial number open 100MHz - - - - http://www.edram.com Preliminary Data Sheet 128MB 32MB 64MB ** Hex Code ** 128 80 80 256 ...

Page 13

Preliminary Data Sheet Mechanical Drawing .079 (2.00) R (2x) 0.118 (3.00) (2X) 0.118 (3.00) TYP 0.118 (3.00) pin 1 (pin 85 on backside) TYP Dimensions: inches (mm) Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921 PHONE: (800) ...

Page 14

Low profile ESDRAM DIMMs 32MB, 64MB, 128MB Revision Log Revision 1.0 3/16/01 Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921 PHONE: (800) 545-DRAM; FAX: (719) 488-9095; Page Date First Draft http://www.edram.com Preliminary Data ...

Page 15

... Preliminary Data Sheet Ordering Information Part Number Capacity SM4M64ALDT SM4M64ALDT-7 SM8M64ALDT SM8M64ALDT-7 SM8M72ALDT SM8M72ALDT-7 SM16M64ALDT-6 128 MB SM16M64ALDT-7.5 128 MB SM16M72ALDT-6 128 MB SM16M72ALDT-7.5 128 MB Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921 PHONE: (800) 545-DRAM; FAX: (719) 488-9095; ...

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