MK2058-01

MK2058-01 Communications Clock Jitter Attenuator Description The MK2058-01 is a VCXO (Voltage Controlled Crystal Oscillator) based clock jitter attenuator designed for system clock distribution applications. This monolithic IC, combined with an external inexpensive quartz crystal, can be used to replace a more costly hybrid VCXO retiming module. The device accepts and outputs the same clock frequency in selectable ranges covering 4kHz to 27MHz. A dual input mux is also provided. By controlling the VCXO frequency within a phase-locked loop (PLL), the output clock is phase and frequency locked to the input clock. Through selection of external loop filter components, the PLL loop bandwidth and damping factor can be tailored to meet system clock requirements. A loop bandwidth down to the Hz range is possible. Features Excellent jitter attenuation for telecom clocks Also serves as a general purpose clock jitter attenuator for distributed system clocks and recovered data or video clocks 2:1 Input MUX for input reference clocks VCXO-based clock generation offers very low jitter and phase noise generation Output clock is phase and frequency locked to the selected input reference clock Fixed input to output phase relationship +115ppm minimum crystal frequency pullability range, using recommended crystal Industrial temperature range Low power CMOS technology 20 pin SOIC package Single 3.3V power supply Block Diagram P u llable xtal VD D ISE T X1 X2 VDD 3 ...