ICS844001-21 Datasheet, PDF (11/17 Pages) Integrated Device Technology – FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER

ICS844001-21
FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER
PRELIMINARY
SCHEMATIC EXAMPLE
Figure 5 shows an example of ICS844001-21 application
schematic. In this example, the device is operated at V = 3.3V.
DD
The 18pF parallel resonant 25MHz crystal is used. The C1 = 22pF
and C2 = 22pF are recommended for frequency accuracy. For
different board layout, the C1 and C2 may be slightly adjusted for
optimizing frequency accuracy. One example of LVDS and one
example of LVCMOS terminations are shown in this schematic.
The decoupling capacitors should be located as close as possible
to the power pin.
FIGURE 5. ICS844001-21 SCHEMATIC LAYOUT
IDT^™ / ICS^™ INSERT PRODUCT NAME
11
ICS844001AG-21 REV. A SEPTEMBER 14, 2007