JAJSDF7A January 2017 – May 2017 LMK61E0M
PRODUCTION DATA.
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 AC or DC coupling. OE and ADD can be left floating. The internal pullup resistor on OE enables OUT0. Leaving ADD floating sets the LSB of the I2C slave address to 01.
The Detailed Design Procedure below describes the procedure to generate and adjust the required output frequency for the above scenario using LMK61E0M.