Mechanical Drawings
110
Thermal and Mechanical Design Guidelines
Figure 7-40. ATX/µATX Motherboard Keep-out Footprint Definition and Height Restrictions for Enabling Components - Sheet 1
B
C
D
A
1
2
3
4
5
6
7
8
C
D
A
47.
50
47.50
2
0.00
2
0.00
39.01
21.00
20.00
28.00
36.78
41.00
36.00
31.51
23.00
15.50
15.50
23.00
31.51
31.51
36.78
45.26
31.96
45.26
19.32
19.32
47.
50
45.
26
36.
49
27.
00
36.
78
23.
47
23.
47
36.
78
45.
26
40.
00
27.
81
32.
51
27.
51
32.
51
27.
51
47.50
4X
4.03
36.00
36.00
24.51
6.15
5.
90
7.
30
7.05
13.00
2.20
33.
00
44.
00
40.
00
39.
01
39.
01
39.01
36.
00
36.
00
(
)
17.44
PIN 1
(
)
16.965
(
)
1.17
(
)
1.09
(
)
1.93
(
)
2.80
(
)
1.09
(
)
1.17
4X
6.00
(
)
37.50
(
)
37.50
(
)
95.00
(
)
72.00
(
)
95.00
(
)
72.00
(
)
0.965
(
)
0.570
(
)
16.00
(
)
16.
87
(
)
20.00
(
)
19.13
LEGEND
SOCKET/THERMO/MECHANICAL COMPONENT KEEP-INS
10.0 MM MAX COMPONENT HEIGHT
2.5 MM MAX COMPONENT HEIGHT
6.0 MM MAX COMPONENT HEIGHT
25.0 MM MAX COMPONENT HEIGHT
1.8 MM MAX COMPONENT HEIGHT
BOARD ROUTING KEEP-OUT
SHEET 1 OF 3
DO NOT SCALE DRAWING
SCALE: NONE
3
C40819
D
REV
DRAWING NUMBER
CAGE CODE
SIZE
LGA775 microATX
COMPONENT KEEP-INS
TITLE
2200 MISSION COLLEGE BLVD.
P.O. BOX 58119
SANTA CLARA, CA 95052-8119
CORP.
R
DEPARTMENT
N/A
FINISH:
N/A
MATERIAL:
DATE
APPROVED BY
DATE
APPROVED BY
DATE
CHECKED BY
DATE
DESIGNED BY
UNLESS OTHERWISE SPECIFIED
INTERPRET DIMENSIONS AND TOLERANCES
IN ACCORDANCE WITH ASME Y14.5M-1994
DIMENSIONS ARE IN MILLIMETERS
THIRD ANGLE PROJECTION
REVISION HISTORY
ZONE
REV
DESCRIPTION
DATE
APPROVED
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2 GEOMETRIC CENTER OF CPU PACKAGE / SOCKET HOUSING CAVITY.
3. BOARD COMPONENET KEEP-INS AND MECHANICAL COMPONENET KEEP-OUTS
TO BE UTILIZED WITH SUFFICIENT ALLOWANCES FOR PLACEMENT AND SIZE TOLERANCES,
ASSEMBLY PROCESS ACCESS, AND DYNAMIC EXCURSIONS.
4. ASSUME SYMMETRY FOR UNDIMENSIONED CORNERS AND EDGES.
DETAIL A
BOARD PRIMARY SIDE
PACKAGE
BOUNDARY
SOCKET BALL 1
SOCKET VOL
OUTLINE
SEE DETAIL A
SOCKET BALLS
PACKAGE LANDS
SOCKET BALL 1
SOCKET HOUSING
CAVITY
PACKAGE BOUNDARY
PIN 1
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