si514 Silicon Laboratories, si514 Datasheet - Page 28

• Manufacturer Part Number: si514
• Description: Any-frequency I 2c Programmable Xo 100 Khz To 250 Mhz
• Manufacturer: Silicon Laboratories

Si 514
9. PCB Land Pattern: 5 x 7 mm, 6-pin
Figure 11 illustrates the 5 x 7 mm, 6-pin PCB land pattern for the Si514. Table 14 lists the values for the
dimensions shown in the illustration.
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Notes:
General
Solder Mask Design
Stencil Design
Card Assembly
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing is per the ANSI Y14.5M-1994 specification.
3. This Land Pattern Design is based on the IPC-7351 guidelines.
4. All dimensions shown are at Maximum Material Condition (MMC). Least
5. All metal pads are to be non-solder mask defined (NSMD). Clearance
6. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls
7. The stencil thickness should be 0.125 mm (5 mils).
8. The ratio of stencil aperture to land pad size should be 1:1.
9. A No-Clean, Type-3 solder paste is recommended.
10. The recommended card reflow profile is per the JEDEC/IPC J-STD-020
Material Condition (LMC) is calculated based on a Fabrication Allowance of
0.05 mm.
between the solder mask and the metal pad is to be 60 µm minimum, all the
way around the pad.
should be used to assure good solder paste release.
specification for Small Body Components.
Dimension
Table 14. PCB Land Pattern Dimensions (mm)
C1
X1
Y1
E
Figure 11. Si514 PCB Land Pattern
Preliminary Rev. 0.9
(mm)
4.20
2.54
1.55
1.95