Si571 Datasheet | Skyworks Solutions

Si570/Si571 1 0 M H Z TO 1 . 4 G H Z I 2C P ROGRAMMABLE X O / V C X O Features - Any programmable output - Internal fixed crystal frequency frequencies from 10 to 945 MHz and ensures high reliability and low select frequencies to 1.4 GHz aging - I2C serial interface - Available LVPECL, CMOS, - 3rd generation DSPLL® with superior LVDS, and CML outputs jitter performance - 3x better frequency stability than SAW-based oscillators - Industry-standard 5x7 mm package - Pb-free/Ro HS-pliant - 1.8, 2.5, or 3.3 V supply Applications - SONET/SDH - x DSL - 10 Gb E LAN/WAN - ATE - High performance instrumentation - Low-jitter clock generation - Optical modules - Clock and data recovery Description The Si570 XO/Si571 VCXO utilizes Skyworks Solutions’ advanced DSPLL® circuitry to provide a low-jitter clock at any frequency. The Si570/Si571 are userprogrammable 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 XO/VCXOs 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 munication systems. Functional Block Diagram CLK- CLK+ Fixed Frequency 10-1400 MHz DSPLLClock Synthesis Si571 only...