si5338b Silicon Laboratories, si5338b Datasheet - Page 29

• Manufacturer Part Number: si5338b
• Description: I2c-programmable Any-rate , Any-output Quad Clock Generator
• Manufacturer: Silicon Laboratories

6. Recommended PCB Layout
Notes:
General
Solder Mask Design
Stencil Design
Card Assembly
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing per ANSI Y14.5M-1994 specification.
3. This Land Pattern Design is based on the IPC-7351 guidelines.
4. All metal pads are to be non-solder mask defined (NSMD). Clearance between the solder mask and the metal pad is
5. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder
6. The stencil thickness should be 0.125mm (5 mils).
7. The ratio of stencil aperture to land pad size should be 1:1 for all perimeter pins.
8. A 2x2 array of 1.0 mm square openings on 1.25mm pitch should be used for the center ground pad.
9. A No-Clean, Type-3 solder paste is recommended.
10. The recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components.
to be 60 µm minimum, all the way around the pad.
paste release.
Dimension
P1
P2
X1
Y1
C1
C2
E
Table 21. PCB Land Pattern
2.50
2.50
0.20
0.75
Min
Rev. 0.3
3.90
3.90
0.50
Nom
2.55
2.55
0.25
0.80
Max
2.60
2.60
0.30
0.85
Si5338
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