SM4M64DT-10 Enhanced Memory Systems, Inc., SM4M64DT-10 Datasheet

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SM4M64DT-10

Manufacturer Part Number
SM4M64DT-10
Description
168-pin Enhanced SDRAM DIMM 32MB 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 8, 16, and 32
MByte capacities, and are organized x64 bits wide. The
DIMMs are 100% pin, function, and timing compatible with
JEDEC standard 168-pin SDRAM DIMMs. The 8MB and
16MB DIMMs employ a single physical bank of memory
while the 32MB DIMMs are built as two physical banks.
Within each physical bank of memory are two logical banks,
which are accessed through the use of BA0 (pin 122). All
control, access, and data input signals are registered into
each of the ESDRAM components through use of an
external clock, CK0-CK3. The rising edge of the clock is
used as the timing reference for all inputs and outputs.
ESDRAM
performance up to 66MHz and nearly the same at bus speeds
up to 133MHz. The speed grade of each DIMM is specified
to real system operation. No de-rating is necessary. For
example, the 10ns DIMM operates at 100MHz in CL=2
mode, and the 7.5ns DIMM operates at 66MHz in CL=1
mode and up to 133MHZ in CL=2 mode.
All ESDRAM DIMMs operate from a 3.3V power supply,
and all inputs and outputs are LVTTL compatible. 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 3.1
JEDEC Standard 168-pin SDRAM DIMM
PC-100 Spec Compliant – Lowest Latency
Single 3.3V
Unbuffered
Fully Synchronous Operation
Sustained Random Burst Reads (Same Bank Access)
Programmable Burst Lengths: 1, 2, 4, 8, or Full page
Early Auto-Precharge and Auto-Refresh Modes
64ms, 2048 Cycle Refresh
LVTTL Compatible Inputs and I/Os
On-Board Serial Presence Detect (SPD) EEPROM with
Write Protect Input
1-1-1-1 at 66MHz (CL=1)
2-1-1-1 at 133MHz (CL=2)
DIMMs
0.3V Power Supply
provide
pipelined
http://www.edram.com
burst
SRAM
Pin Assignments
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#
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
RFU
CK0
Vdd
Vdd
Vdd
S0#
Vdd
Vdd
Vss
Vss
Vss
Vss
NC
NC
NC
NC
DU
A0
A2
A4
A6
A8
The information contained herein is subject to change without notice.
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
168-pin Enhanced SDRAM DIMM
Symbol
DQMB2
DQMB3
DQ16
DQ17
DQ18
DQ19
DQ20
CKE1
DQ21
DQ22
DQ23
DQ24
DQ25
DQ26
DQ27
DQ28
DQ29
DQ30
DQ31
SDA
CK2
SCL
1999 Enhanced Memory Systems. All rights reserved.
Vss
S2#
Vdd
Vss
Vdd
Vss
Vss
Vdd
Vss
Vdd
WP
DU
DU
NC
NC
NC
NC
NC
NC
NC
8MB, 16MB, 32MB DIMM
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
Symbol
DQMB4
DQMB5
DQ32
DQ33
DQ34
DQ35
DQ36
DQ37
DQ38
DQ39
DQ40
DQ41
DQ42
DQ43
DQ44
DQ45
DQ46
DQ47
CAS#
RAS#
RFU
CK1
RFU
BA0
Vss
Vdd
Vss
Vdd
Vss
Vdd
S1#
Vss
Vdd
NC
NC
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 13
Symbol
DQMB6
DQMB7
DQ48
CKE0
DQ49
DQ50
DQ51
DQ52
DQ53
DQ54
DQ55
DQ56
DQ57
DQ58
DQ59
DQ60
DQ61
DQ62
DQ63
RFU
CK3
SA0
SA2
S3#
Vdd
Vdd
Vdd
SA1
Vdd
Vss
Vss
Vss
Vss
Vss
NC
NC
NC
NC
NC
NC
NC
NC

Related parts for SM4M64DT-10

SM4M64DT-10 Summary of contents

Page 1

Preliminary Data Sheet Features JEDEC Standard 168-pin SDRAM DIMM PC-100 Spec Compliant – Lowest Latency Single 3.3V 0.3V Power Supply Unbuffered Fully Synchronous Operation Sustained Random Burst Reads (Same Bank Access) 1-1-1-1 at 66MHz (CL=1) 2-1-1-1 at 133MHz (CL=2) Programmable ...

Page 2

Enhanced SDRAM DIMM 8MB, 16MB, 32MB DIMM Pin Descriptions Symbol Type CK0,1,2,3 Input Clocks: All ESDRAM input signals are sampled on the positive edge of CK. CKE0,1 Input Clock Enables: CKE activates (high) or deactivates (low) the CK signals. ...

Page 3

Preliminary Data Sheet 1Mx64 (8MB) DIMM Functional Block Diagram – SM1M64DT S0# DQMB0 DQ(7:0) U1 DQMB1 DQ(15:8) S2# DQMB2 DQ(23:16) U2 DQMB3 DQ(31:24) Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921 PHONE: (800) 545-DRAM; FAX: (719) 488-9095; ...

Page 4

Enhanced SDRAM DIMM 8MB, 16MB, 32MB DIMM 2Mx64 (16MB) DIMM Functional Block Diagram – SM2M64DT S0# DQMB0 U1 DQ(7:0) DQMB1 U3 DQ(15:8) S2# DQMB2 U7 DQ(23:16) DQMB3 U9 DQ(31:24) Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO ...

Page 5

... Preliminary Data Sheet 4Mx64 (32MB) DIMM Functional Block Diagram – SM4M64DT S0# S1# DQMB0 U1 U20 DQ(7:0) DQMB1 U3 U18 DQ(15:8) S2# S3# DQMB2 U7 U14 DQ(23:16) DQMB3 U9 U12 DQ(31:24) Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921 PHONE: (800) 545-DRAM; FAX: (719) 488-9095; Revision 3.1 DQMB4 U2 DQ(39:32) DQMB5 U4 DQ(47:40) DQMB6 U6 DQ(55:48) DQMB7 ...

Page 6

Enhanced SDRAM DIMM 8MB, 16MB, 32MB DIMM 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 7

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 8

Enhanced SDRAM DIMM 8MB, 16MB, 32MB DIMM Common Parameters Symbol Parameter t Command Setup Time CS t Command Hold Time CH t Address and Bank Select Setup Time AS t Address and Bank Select Hold Time AH t RAS ...

Page 9

Preliminary Data Sheet Write Cycle Symbol Parameter t Data In Setup Time OS t Data In Hold Time OH t Data Input to Precharge DPL t Data In to Active/Refresh DAL t DQM Write Mask Latency DQW Notes ...

Page 10

Enhanced SDRAM DIMM 8MB, 16MB, 32MB DIMM Serial Presence Detect (SPD) for PC-133 DIMMs Byte Description 0 Number of bytes written into EEPROM 1 Total number of SPD bytes 2 Memory Type 3 Number of Row Addresses 4 Number ...

Page 11

... 7F32FFFFFFFFFFFF 00 00 SM4M64DT rrrr rrrr yyww yyww ssss ssss 1999 Enhanced Memory Systems. All rights reserved. The information contained herein is subject to change without notice. 32MB ...

Page 12

Enhanced SDRAM DIMM 8MB, 16MB, 32MB DIMM 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 ...

Page 13

... SM2M64DT- SM4M64DT-7 SM4M64DT- Note: Enhanced Memory Systems ESDRAM DIMMs are labeled per the Intel PC SDRAM DIMM Naming Convention. This convention requires identification of the bus speed, latency, clock access time, and SPD revision code. The codes for these DIMM modules is PC133-222-45120 for the – ...

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