Consider a typical digital subscriber line (DSL) application, in which a local modem must track the clock signal of a network modem to ensure accurate and efficient data transfer. In such systems, a DCXO is implemented to allow a local processor to digitally control the oscillator frequency to maintain synchronization. An example of such a clock frequency would be 70.656 MHz.

The typical schematic above shows the I²C connection to the processor and output configurations for LVPECL AC coupling. .

The Detailed Design Procedure below describes the procedure to generate and adjust the required output frequency for the above scenario using LMK61E07.