Datasheet

LTM4618
23
4618fa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
PACKAGE DESCRIPTION
LGA Package
84-Lead (15mm × 9mm × 4.32mm)
(Reference LTC DWG # 05-08-1842 Rev A)
NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M-1994 2. ALL DIMENSIONS ARE IN MILLIMETERS LAND DESIGNATION PER JESD MO-222 5. PRIMARY DATUM -Z- IS SEATING PLANE 6. THE TOTAL NUMBER OF PADS: 84
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
4.22 – 4.42
DETAIL B
DETAIL B
SUBSTRATE
MOLD
CAP
0.27 – 0.37
3.95 – 4.05
Z
PACKAGE TOP VIEW
9.00
BSC
15.00
BSC
4
PAD “A1”
CORNER
X
Y
aaa Z
aaa Z
PACKAGE BOTTOM VIEW
3
PADS SEE NOTES
SUGGESTED PCB LAYOUT
TOP VIEW
LGA 84 0409 REV A
LTMXXXXXX
µModule
TRAY PIN 1
BEVEL
PACKAGE IN TRAY LOADING ORIENTATION
COMPONENT
PIN “A1”
DETAIL A
7.620
BSC
1.27
BSC
13.97
BSC
675 1234
H B A D C E F G M J K L
0.000
1.270
1.270
2.540
2.540
3.810
3.810
6.985 6.985 4.445 4.445 5.715 5.715 3.175 3.175 1.905 1.905 0.635 0.635 0.000
SYMBOL
aaa
bbb
eee
TOLERANCE
0.15 0.10 0.05
0.315
0.315
DIA (0.630) PAD 1
3s CHAMFER
0.22
s 45°
DETAIL A
0.630 ±0.025 SQ. 83x
S
YXeee
bbb Z