ICS843002 Datasheet, PDF (9/16 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS843002
FEMTOCLOCKS™ CRYSTAL-TO-
3.3V LVPECL FREQUENCY SYNTHESIZER
CRYSTAL INPUT INTERFACE
The ICS843002 has been characterized with 18pF parallel
resonant crystals. The capacitor values shown in Figure 3
below were determined using a 26.5625MHz 18pF parallel
resonant crystal and were chosen to minimize the ppm error.
X1
18pF Parallel Crystal
XTAL_OUT
C1
33p
XTAL_IN
C2
27p
ICS843002
Figure 3. CRYSTAL INPUt INTERFACE
843002AG
www.icst.com/products/hiperclocks.html
9
REV. B MAY 6, 2005