ICS844004I Datasheet, PDF (9/12 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS844004I
FEMTOCLOCKS™ CRYSTAL-TO-
LVDS FREQUENCY SYNTHESIZER
3.3V, 2.5V LVDS DRIVER TERMINATION
A general LVDS interface is shown in Figure 3. In a 100Ω
differential transmission line environment, LVDS drivers
require a matched load termination of 100Ω across near
the receiver input. For a multiple LVDS outputs buffer, if only
partial outputs are used, it is recommended to terminate the
un-used outputs.
VDD
LVDS_Driv er
R1
100
100 Ohm Differential Transmission Line
2.5V or 3.3V
+
-
FIGURE 3. TYPICAL LVDS DRIVER TERMINATION
844004AGI
www.icst.com/products/hiperclocks.html
9
REV. A JUNE 15, 2005