XO and VCXO oscillators are used to provide discrete frequencies for Asynchronous and Clock-Data Recovery (CDR) communications circuits. Silicon Labs offers standard and customized oscillators. The Si53x XO Oscillator provides several features which include: 3x better frequency stability than a SAW oscillator, On-chip regulation ensures low jitter operation, a reliability of 0.5 dppm (defective parts per million) over 10 years, and create custom clock part number online in <1 minute. Other solutions require sophisticated filtering on the VDD supply pins in order to meet the datasheet jitter specs. Skyworks Solutions integrated power supply rejection eases clock layout and provides BOM cost savings.