SMX1J ST Microelectronics, Inc., SMX1J Datasheet - Page 7

• Manufacturer Part Number: SMX1J
• Manufacturer: ST Microelectronics, Inc.

SMX1J
4
4.1
Recommendation on PCB assembly
Stencil opening design
1.
Figure 14. Stencil opening dimensions
2.
Figure 15. Recommended stencil windows position
General recommendation on stencil opening design
a)
b)
Reference design
a)
b)
95 µm
Stencil opening dimensions: L (Length), W (Width), T (Thickness).
General design rule
Stencil thickness (T) = 75 ~ 125 µm
Stencil opening thickness: 100 µm
Stencil opening for leads: Opening to footprint ratio - between 65% and 70%.
Aspect Ratio
Aspect Area
360 µm
550 µm
95 µm
=
=
W
---- -
--------------------------- -
2T L
T
Doc ID 16180 Rev 2
135 µm
135 µm
L
1.5
+
W
W
L
0.66
T
W
Recommendation on PCB assembly
Footprint
Stencil window
Footprint
T=100 µm
0.62
1.72
0.55
0.83
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