Datasheet

LT8640/LT8640-1
28
Rev.C
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PACKAGE DESCRIPTION
3.00 ±0.10
1.50 REF
4.00 ±0.10
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON THE TOP AND BOTTOM OF PACKAGE
PIN 1
TOP MARK
(NOTE 5)
0.40 ±0.10
PIN 1 ID
0.12 × 45°
0.356 ±0.05
0.220 ±0.05
0.400 ±0.05
0.770
BSC
0.770
BSC
1
2
BOTTOM VIEW—EXPOSED PAD
2.50 REF
2.127 ±0.10
0.75 ±0.05
R = 0.110
TYP
0.25 ±0.05
0.50 BSC
0.200 REF
0.00 – 0.05
0.203 REF
TERMINAL THICKNESS
TERMINAL LENGTH
0.40 ± 0.10
0.05 REF
PLATED AREA
DETAIL A
DETAIL A
(UDCF20(18)) QFN 1217
0.10 REF
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
0.70 ±0.05
0.25 ±0.05
2.50 REF
3.10 ±0.05
4.50 ±0.05
1.50 REF
0.356 ±0.05
0.055 BSC
0.400 ±0.05
0.220 ±0.05
2.10 ±0.05
3.50 ±0.05
PACKAGE OUTLINE
0.50 BSC
UDCF Package
20(18)-Lead Plastic Side Wettable QFN (3mm × 4mm)
(Reference LTC DWG # 05-08-1617)
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