05-08-1868

LGA Package
81-Lead (15mm × 11.25mm × 2.82mm)
(Reference LTC DWG # 05-08-1868 Rev A)
DETAIL A
8
A
aaa Z
SEE NOTES
7
6
5
4
3
2
7
1
PAD 1
A
PAD “A1”
CORNER
b
B
4
C
D
E
MOLD
CAP
D
F
SUBSTRATE
F
G
H
0.27 – 0.37
J
Z
// bbb Z
2.45 – 2.55
K
e
DETAIL B
L
aaa Z
DETAIL B
DIA (0.630) 81x
PACKAGE BOTTOM VIEW
2. ALL DIMENSIONS ARE IN MILLIMETERS
4.445
3.175
1.905
0.000
0.635
0.635
1.905
3.175
3
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M-1994
eee S X Y
4.445
SEE NOTES
G
PACKAGE TOP VIEW
6.350
0.630 ±0.025 Ø 81x
e
b
X
Y
E
3
LAND DESIGNATION PER JESD MO-222, SPP-010
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
DETAIL A
5.080
5. PRIMARY DATUM -Z- IS SEATING PLANE
6. THE TOTAL NUMBER OF PADS: 81
DIMENSIONS
0.000
5.080
6.350
SUGGESTED PCB LAYOUT
TOP VIEW
SYMBOL
A
b
D
E
e
F
G
aaa
bbb
eee
MIN
2.72
0.60
NOM
2.82
0.63
15.0
11.25
1.27
12.70
8.89
MAX
2.92
0.66
0.15
0.10
0.05
TOTAL NUMBER OF LGA PADS: 81
NOTES
7
!
COMPONENT
PIN “A1”
TRAY PIN 1
BEVEL
PACKAGE ROW AND COLUMN LABELING MAY VARY
AMONG µModule PRODUCTS. REVIEW EACH PACKAGE
LAYOUT CAREFULLY
LTMXXXXXX
µModule
PACKAGE IN TRAY LOADING ORIENTATION
LGA 81 1212 REV A