844201 Datasheet, PDF (7/16 Pages) Integrated Device Technology – FemtoClock Crystal-to-LVDS Clock Generator

ICS844201-45 Data Sheet
FEMTOCLOCK^® CRYSTAL-TO-LVDS CLOCK GENERATOR
Application Information
Crystal Input Interface
The ICS844201-45 has been characterized with 18pF parallel
resonant crystals. The capacitor values, C1 and C2, shown in Figure
1 below were determined using a 25MHz, 18pF parallel resonant
crystal and were chosen to minimize the ppm error. The optimum C1
and C2 values can be slightly adjusted for different board layouts.
X1
18pF Parallel Crystal
C1
27pF
XTAL_IN
C2
27pF
XTAL_OUT
Figure 1. Crystal Input Interface
ICS844201BG-45 REVISION A OCTOBER 1, 2013
7
©2013 Integrated Device Technology, Inc.