mt18vddt12872ag-335 Micron Semiconductor Products, mt18vddt12872ag-335 Datasheet - Page 29

• Manufacturer Part Number: mt18vddt12872ag-335
• Description: 256mb, 512mb, 1gb, 2gb X72, Ecc, Dr 184-pin Ddr Sdram Udimm
• Manufacturer: Micron Semiconductor Products

Table 22: Serial Presence-Detect Matrix (256MB, 512MB, and 1GB) (Continued)
“1”/“0”: Serial Data, “driven to HIGH”/“driven to LOW”; notes appear on page 30
pdf: 09005aef80814e61, source: 09005aef807f8acb
DD18C32_64_128_256x72AG.fm - Rev. B 9/04 EN
48–61 Reserved
BYTE
36-40 Reserved
65-71 Manufacturer’s JEDEC ID Code
73-90 Module Part Number (ASCII)
29
30
31
32
33
34
35
41
42
43
44
45
46
47
62
63
64
72
91
92
93
Minimum RAS# to CAS# Delay,
(see note 4)
Minimum RAS# Pulse Width,
(see note 2)
Module Rank Density
Address And Command Setup Time,
t
Address And Command Hold Time,
t
Data/ Data Mask Input Setup Time,
t
Data/ Data Mask Input Hold Time,
t
Min Active Auto Refresh Time,
Minimum Auto Refresh to Active/
Auto Refresh Command Period,
SDRAM Device Max Cycle Time,
t
SDRAM Device Max DQS-DQ Skew
Time,
SDRAM Device Max Read Data Hold
Skew Factor,
Reserved
DIMM Height
SPD Revision
Checksum for Bytes 0–62
Manufacturer’s JEDEC ID Code
Manufacturing Location
PCB Identification Code
Identification Code (Continued)
Year of Manufacture in BCD
IS
IH
DS
DH
CK
s,
s,
MAX
(see note 3)
(see note 3)
t
DQSQ
DESCRIPTION
t
QHS
t
RAS,
t
t
RCD
RC
t
RFC
128MB, 256MB, 512MB
45ns (-262/-26A/-265)
75ns (-262/-26A/-265)
13ns (-262/-26A/-265)
0.5ns (-262/-26A/-265)
0.75ns (-262/-26A/-265)
1.0ns (-262/-26A/-265)
1.0ns (-262/-26A/-265)
0.5ns (-262/-26A/-265)
0.5ns (-262/-26A/-265)
ENTRY (VERSION)
20ns (-26A/-265)
65ns (-26A/-265)
60ns (-335/-262)
0.45ns (-335)
0.45ns (-335)
0.45ns (-335)
0.55ns (-335)
(Continued)
0.8ns (-335)
0.8ns (-335)
18ns (-335)
15ns (-262)
42ns (-335)
72ns (-335)
12ns (-335)
Release 1.0
256MB, 512MB, 1GB, 2GB (x72, ECC, DR)
MICRON
01–12
-26A
-335
-262
-265
1-9
0
29
MT18VDDT3272A MT18VDDT6472A MT18VDDT12872A
Variable Data
Variable Data
Micron Technology, Inc., reserves the right to change products or specifications without notice.
184-PIN DDR SDRAM UDIMM
01–0C
01-09
AA
2A
2D
A0
A0
2D
D7
48
3C
50
20
80
80
45
50
45
50
00
3C
41
48
4B
30
34
32
55
75
00
01
00
10
07
2C
00
17
FF
Variable Data
Variable Data
01–0C
01-09
2A
2D
A0
A0
2D
3A
CD
2A
3C
3C
4B
FA
2C
48
50
40
80
80
45
50
45
50
00
41
48
30
34
32
55
75
00
01
00
10
00
FF
©2004 Micron Technology, Inc. All rights reserved.
Variable Data
Variable Data
01–0C
01-09
3C
2A
2D
A0
A0
3C
4B
2D
7B
3B
6B
2C
48
50
80
80
80
45
50
45
50
00
41
48
30
34
32
55
75
00
01
00
10
0E
00
FF