SI4730-C40-GU Datasheet, PDF (38/42 Pages) Silicon Laboratories – BROADCAST AM/FM RADIO RECEIVER

Si4730/31-C40
14. PCB Land Pattern: Si4730/31 SSOP
Figure 17 illustrates the PCB land pattern details for the Si4730/31-C40-GU SSOP. Table 19 lists the values for the
dimensions shown in the illustration.
Figure 17. PCB Land Pattern
Table 19. PCB Land Pattern Dimensions
Dimension
Min
Max
C
5.20
5.40
E
0.65 BSC
X1
0.35
0.45
Y1
1.55
1.75
General:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. This land pattern design is based on the IPC-7351 guidelines.
Solder Mask Design:
3. All metal pads are to be non-solder mask defined (NSMD). Clearance between the
solder mask and the metal pad is to be 60 µm minimum, all the way around the pad.
Stencil Design:
4. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should
be used to assure good solder paste release.
5. The stencil thickness should be 0.125 mm (5 mils).
6. The ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads.
Card Assembly:
7. A No-Clean, Type-3 solder paste is recommended.
8. The recommended card reflow profile is per the JEDEC/IPC J-STD-020
specification for Small Body Components.
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Rev. 1.0