si511 Silicon Laboratories, si511 Datasheet - Page 16

• Manufacturer Part Number: si511
• Description: Crystal Oscillator Xo 100 Khz To 250 Mhz
• Manufacturer: Silicon Laboratories

Si510/511
8. PCB Land Pattern: 5 x 7 mm, 6-pin
Figure 7 illustrates the 5 x 7 mm PCB land pattern for the Si510/511. Table 14 lists the values for the dimensions
shown in the illustration.
16
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 Material Condition
5. All metal pads are to be non-solder mask defined (NSMD). Clearance between the solder
6. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to
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 specification for Small
(LMC) is calculated based on a Fabrication Allowance of 0.05 mm.
mask and the metal pad is to be 60 µm minimum, all the way around the pad.
assure good solder paste release.
Body Components.
Dimension
C1
X1
Y1
E
Table 14. PCB Land Pattern Dimensions (mm)
Figure 7. Si510/511 PCB Land Pattern
Preliminary Rev. 0.9
(mm)
4.20
2.54
1.55
1.95