SM4M64ALDT-6 Enhanced Memory Systems, Inc., SM4M64ALDT-6 Datasheet - Page 12

• Manufacturer Part Number: SM4M64ALDT-6
• Description: 168-pin Low Profile ESDRAM DIMM
• Manufacturer: Enhanced Memory Systems, Inc.

168-pin Low profile ESDRAM DIMMs
32MB, 64MB, 128MB
Serial Presence Detect (SPD) for ESDRAM DIMMs
Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921
PHONE: (800) 545-DRAM; FAX: [phone];
Page 12 of 15
128-255 Open for Customer Use
99-125 Manufacturer's Specific Data
36-60 Superset Information
64-71 JEDEC ID code
73-90 Manufacturer's Part #
95-98 Assembly Serial #
Byte Description
91,92
93,94
126
127
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
61
62
63
72
0
1
2
3
4
5
6
7
8
9
Number of bytes written into EEPROM
Total number of SPD bytes
Memory Type
Number of Row Addresses
Number of Column Addresses
Number of Module Banks
Module Data Width
Module Data Width (cont’d)
Voltage Interface Levels
Cycle Time at max CAS Latency
SDRAM Clock Access Time
DIMM config (non-parity, parity, ECC)
Refresh Rate and Type
Primary SDRAM Width
Error Checking Data Width
Min. CAS-to-CAS Delay (tCCD)
Burst Lengths Supported
Number of Banks on SDRAM Device
CAS Latencies Supported
CS Latency
Write Latency
SDRAM Module Attributes
SDRAM Device Attributes
Min. Clock Cycle Time at CL=2
Clock Access Time at CL=2 (tAC2)
Min. Clock Cycle Time at CL=1
Clock Access Time at CL=1 (tAC1)
Min. Row Precharge Time (tRP)
Min. Row-to-Row Delay (tRRD)
Min. RAS-to-CAS Delay (tRCD)
Min. RAS Pulse Width (tRAS)
Density of each bank on module
Cmd/Addr input set-up time
Cmd/Addr input hold time
Data input set-up time
Data input hold time
Superset Information (cont’d)
SPD Rev.
Checksum for bytes 0-62
Manufacturing Location
PCB Rev. Code
Manufacturing Date
Intel specification frequency
Intel specification CL and clock support
non-ECC
ECC
http://www.edram.com
x64
x72
x64
x72
x64
x72
SM4M64ALDT SM8M64ALDT
SDRAM
32MB
10.5 ns
LVTTL
6.0 ns
4.3 ns
4.6 ns
32MB
12 ns
12 ns
12 ns
12 ns
18 ns
1,2,3
1 clk
6 ns
128
256
N/A
x64
x16
12
8
1
0
4
0
0
-
-
-
-
-
ESDRAM defined for Code=01
Enhanced Memory Systems
+/-10% Vdd, Precharge All
--- 15.625us / Self ---
--- 1,2,4,8,Full Pg ---
--- Unbuffered ---
--- Non-parity ---
SM8M72ALDT
serial number
--- ECC ---
yyww code
SDRAM
100MHz
64MB
10.5 ns
LVTTL
6.0 ns
4.3 ns
4.6 ns
64MB
12 ns
12 ns
12 ns
12 ns
18 ns
1.5 ns
0.8 ns
1.5 ns
0.8 ns
1,2,3
open
1 clk
6 ns
128
256
x64
x72
N/A
1.2
12
x8
x8
9
1
0
4
0
0
-
-
-
-
-
-
SM16M64ALDT
SM16M72ALDT
128MB
SDRAM
10.5 ns
LVTTL
6.0 ns
4.3 ns
4.6 ns
64MB
12 ns
12 ns
12 ns
12 ns
18 ns
1,2,3
1 clk
6 ns
128
256
N/A
The information contained herein is subject to change without notice.
x64
x72
12
x8
x8
9
2
0
4
0
0
-
-
-
-
-
2001 Enhanced Memory Systems. All rights reserved.
32MB
yyww
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2A
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0C
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00
07
60
46
30
12
08
15
08
15
08
00
01
12
44
00
64
00
7F32FFFFFFFFFFFF
** Hex Code **
Preliminary Data Sheet
64MB
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0C
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00
07
60
46
30
12
10
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08
15
08
00
01
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45
57
00
64
00
128MB
Revision 1.0
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01
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02
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58
00
64
00