Datasheet

LTM8042/LTM8042-1
30
80421fa
PACKAGE DESCRIPTION
LGA Package
77-Lead (15mm × 9mm × 2.82mm)
(Reference LTC DWG # 05-08-1859 Rev Ø)
NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M-1994 2. ALL DIMENSIONS ARE IN MILLIMETERS LAND DESIGNATION PER JESD MO-222, SPP-010 5. PRIMARY DATUM -Z- IS SEATING PLANE 6. THE TOTAL NUMBER OF PADS: 77
4 3
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
SYMBOL
aaa
bbb
eee
TOLERANCE
0.15 0.10 0.05
2.72 – 2.92
DETAIL B
DETAIL B
SUBSTRATE
MOLD
CAP
0.27 – 0.37
2.45 – 2.55
// bbb Z
Z
15
BSC
PACKAGE TOP VIEW
9
BSC
4
PAD 1
CORNER
X
Y
aaa Z
aaa Z
DETAIL A
12.70
BSC
1.27
BSC
7.62
BSC
L K J H G F E D C B
PACKAGE BOTTOM VIEW
3
PADS
SEE NOTES
A
1234567
DETAIL A
0.635 ±0.025 SQ. 76x
S
YXeee
SUGGESTED PCB LAYOUT
TOP VIEW
0.000 1.270 1.270 2.540 2.540 3.810 3.810 5.080 5.080 6.350 6.350
3.810
1.270
2.540
0.000
1.270
3.810
2.540
LGA 77 (1859) 0709 REV Ø
PAD 1 DIA (0.635)
0.9525 1.5875
0.9525
1.5875
PACKAGE IN TRAY LOADING ORIENTATION
LTMXXXXXX
MModule
TRAY PIN 1
BEVEL
COMPONENT
PIN “A1”