PDF: 09005aef818e3fc8/Source: 09005aef818e3fdb Micron Technology, Inc., reserves the right to change products or specifications without notice.
HTF36C256_512x72.fm - Rev. C 1/07 EN
16 ©2005 Micron Technology, Inc. All rights reserved.
2GB, 4GB (x72, ECC, DR) 240-Pin DDR2 SDRAM RDIMM
Serial Presence-Detect
Notes: 1. The
t
RC SPD values shown are JEDEC DDR2 device specification values. The actual Micron
DDR2 device specification is
t
RC = 55ns for all speed grades.
45
SDRAM device MAX read data hold skew factor,
t
QHS
-80E/-800
-667
-53E
-40E
1E
22
28
2D
1E
22
28
2D
46
PLL relock time
15µs 0F 0F
47–61
Optional features, not supported
00 00
62
SPD revision
Release 1.2 12 12
63
Checksum for bytes 0–62
ECC/ECC and Parity
-80E
-800
-667
-53E
-40E
–/31
D2/D6
ED/F1
98/9C
FF/03
50/54
F1/F5
0C/10
B7/BB
1E/22
64
Manufacturers JEDEC ID code
MICRON 2C 2C
65–71
Manufacturers JEDEC ID code
(continued) FF FF
72
Manufacturing location
01–12 01–0C 01–0C
73–90
Module part number (ASCII)
Variable data Variable data
91
PCB identification code
1–9 01–09 01–09
92
Identification code (continued)
00000
93
Year of manufacture in BCD
Variable data Variable data
94
Week of manufacture in BCD
Variable data Variable data
95–98
Module serial number
Variable data Variable data
99–127
Reserved for manufacturer-specific data
00 00
128–255
Reserved for customer use
FF FF
Table 16: Serial Presence-Detect Matrix (continued)
Byte Description Entry (Version) 2GB 4GB
PDF: 09005aef818e3fc8/Source: 09005aef818e3fdb Micron Technology, Inc., reserves the right to change products or specifications without notice.
HTF36C256_512x72.fm - Rev. C 1/07 EN
17 ©2005 Micron Technology, Inc. All rights reserved.
2GB, 4GB (x72, ECC, DR) 240-Pin DDR2 SDRAM RDIMM
Module Dimensions
Module Dimensions
Figure 4: 240-Pin DDR2 RDIMM – 2GB
Notes: 1. All dimensions are in millimeters (inches) MAX/MIN or typical (TYP) where noted.
2. The dimensional diagram is for reference only. Refer to the MO document for complete
design dimensions.
PIN 1
17.78 (0.70)
TYP
2.50 (0.098) D
(2X)
2.30 (0.091) TYP
5.0 (0.197) TYP
123.0 (4.840)
TYP
1.0 (0.039)
TYP
0.80 (0.031)
TYP
2.0 (0.079) R
(4X)
0.76 (0.030) R
PIN 120
FRONT VIEW
133.50 (5.256)
133.20 (5.244)
63.0 (2.48)
TYP
55.0 (2.165)
TYP
10.0 (0.394)
TYP
BACK VIEW
PIN 240
PIN 121
1.37 (0.054)
1.17 (0.046)
4.0 (0.157)
MAX
70.66 (2.782)
TYP
2.21 (0.087) TYP
3.04 (0.1197)
TYP
U1
U2 U3
U4 U5
U6
U7
U17
U8
U9 U10 U11
U12 U13 U14 U15 U16 U18 U19 U20 U21
U22 U23 U24 U25
U26
U36
U37
U27
U28
U29
U30 U31
U32 U33 U34 U38 U39
U40
U41
U42
U35
1.0 (0.039) TYP
30.50 (1.20)
29.85 (1.175)
®
8000 S. Federal Way, P.O. Box 6, Boise, ID 83707-0006, Tel: 208-368-3900
prodmktg@micron.com www.micron.com Customer Comment Line: 800-932-4992
Micron, the M logo, and the Micron logo are trademarks of Micron Technology, Inc. All other trademarks are the property of
their respective owners.
This data sheet contains minimum and maximum limits specified over the complete power supply and temperature range
for production devices. Although considered final, these specifications are subject to change, as further product
development and data characterization sometimes occur.
2GB, 4GB (x72, ECC, DR) 240-Pin DDR2 SDRAM RDIMM
Module Dimensions
PDF: 09005aef818e3fc8/Source: 09005aef818e3fdb Micron Technology, Inc., reserves the right to change products or specifications without notice.
HTF36C256_512x72.fm - Rev. C 1/07 EN
18 ©2005 Micron Technology, Inc. All rights reserved.
Figure 5: 240-Pin DDR2 RDIMM – 4GB
Notes: 1. All dimensions are in millimeters (inches) MAX/MIN or typical (TYP) where noted.
2. The dimensional diagram is for reference only. Refer to the MO document for complete
design dimensions.
PIN 1
17.78 (0.70)
TYP
2.50 (0.098) D
(2X)
2.30 (0.091) TYP
5.0 (0.197) TYP
123.0 (4.840)
TYP
1.0 (0.039)
TYP
0.80 (0.031)
TYP
2.0 (0.079) R
(4X)
0.76 (0.030) R
PIN 120
FRONT VIEW
133.50 (5.256)
133.20 (5.244)
63.0 (2.48)
TYP
55.0 (2.165)
TYP
10.0 (0.394)
TYP
BACK VIEW
PIN 240
PIN 121
0.054 (1.37)
0.046 (1.17)
4.0 (0.157)
MAX
70.66 (2.782)
TYP
2.21 (0.087) TYP
3.04 (0.1197)
TYP
1.0 (0.039) TYP
U1 U2
U3
U4 U5
U6
U7
U17
U8 U9 U10 U11
U12
U13
U14
U15 U16 U18 U19 U20 U21
U22
U23 U24 U25
U26
U36
U37
U27
U28
U29
U30 U31
U32 U33 U34 U38
U39
U40
U35
30.50 (1.20)
29.85 (1.175)

MT36HTF25672Y-667D1

Mfr. #:
Manufacturer:
Micron
Description:
MODULE DDR2 SDRAM 2GB 240RDIMM
Lifecycle:
New from this manufacturer.
Delivery:
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