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LTM8031
PACKAGE DESCRIPTION
LGA Package
71-Lead (15mm × 9mm × 2.82mm)
(Reference LTC DWG # 05-08-1823 Rev ?)
aaa Z
2.670 – 2.970
7
6
5
4
3
2
1
PAD 1
? (0.635)
PAD 1
CORNER
4
A
B
C
D
E
15.00
BSC
2.40 – 2.60
MOLD
CAP
DETAIL A
SUBSTRATE
0.27 – 0.37
12.700
BSC
1.270
BSC
F
G
H
J
K
L
7.620
9.00
BSC
PACKAGE TOP VIEW
Y
X
DETAIL A
PACKAGE SIDE VIEW
PADS
SEE NOTES
3
1.27
BSC
BSC
PACKAGE BOTTOM VIEW
DETAIL A
0.635 ±0.025 SQ. 71x
eee S X Y
6.350
DETAIL A
5.080
3.810
2.540
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M-1994
2. ALL DIMENSIONS ARE IN MILLIMETERS
3 LAND DESIGNATION PER JESD MO-222, SPP-010 AND SPP-020
COMPONENT
PIN 1
LTMXXXXXX
μModule
1.270
0.000
4
DETAILS OF PAD #1 IDENTIFIER ARE OPTIONAL,
BUT MUST BE LOCATED WITHIN THE ZONE INDICATED.
THE PAD #1 IDENTIFIER MAY BE EITHER A MOLD OR
MARKED FEATURE
TRAY PIN 1
BEVEL
PACKAGE IN TRAY LOADING ORIENTATION
LGA 71 0108 REV ?
1.270
2.540
3.810
5. PRIMARY DATUM -Z- IS SEATING PLANE
6. THE TOTAL NUMBER OF PADS: 71
SYMBOL TOLERANCE
aaa 0.15
5.080
bbb
eee
0.10
0.05
6.350
SUGGESTED PCB LAYOUT
TOP VIEW
8031fb
19
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