Any, I²C Programmable XO

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The Si570 XO utilizes Silicon Laboratories’ advanced DSPLL® circuitry to provide a low-jitter clock at any frequency. The Si570 are user-programmable to any output frequency from 10 to 945 MHz and select frequencies to 1400 MHz with <1 ppb resolution. The device is programmed via an I²C serial interface. Unlike traditional XOs where a different crystal is required for each output frequency, the Si57x uses one fixed-frequency crystal and a DSPLL clock synthesis IC to provide any-frequency operation. This IC-based approach allows the crystal resonator to provide exceptional frequency stability and reliability. In addition, DSPLL clock synthesis provides superior supply noise rejection, simplifying the task of generating low-jitter clocks in noisy environments typically found in communication systems.

• xDSL
• 10 GbE LAN/WAN
• High performance instrumentation
• Low-jitter clock generation
• Optical modules
• Clock and data recovery

Symmetry Electronics is an authorized Silicon Labs distributor.


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Any programmable output frequencies from 10 to 945 MHz and select frequencies to 1.4 GHz
IC serial interface
3rd generation DSPLL with superior jitter performance
3x better frequency stability than SAW-based oscillators
Internal fixed crystal frequency ensures high reliability and low aging
Available LVPECL, CMOS, LVDS, and CML outputs
Industry-standard 5x7 mm package
1.8, 2.5, or 3.3 V supply

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