SI554

Si554 REVISION D QUAD FREQUENCY VOLTAGE-CONTROLLED CRYSTAL OSCILLATOR (VCXO) 10 MHZ TO 1.4 GHZ Features  Available with any-rate output  Internal fixed crystal frequency frequencies from 10–945 MHz and ensures high reliability and low selected frequencies to 1.4 GHz aging  Four selectable output frequencies  Available CMOS, LVPECL,  3rd generation DSPLL® with superior LVDS, and CML outputs jitter performance  3.3, 2.5, and 1.8 V supply options  3x better frequency stability than  Industry-standard 5 x 7 mm SAW-based oscillators package and pinout  Pb-free/RoHS-compliant Applications  SONET/SDH  xDSL  10 GbE LAN / WAN Description  Low jitter clock generation  Optical modules  Clock and data recovery The Si554 quad-frequency VCXO utilizes Silicon Laboratories’ advanced DSPLL® circuitry to provide a very low jitter clock for all output frequencies. The Si554 is available with any-rate output frequency from 10 to 945 MHz and selected frequencies to 1400 MHz. Unlike traditional VCXOs, where a different crystal is required for each output frequency, the Si554 uses one fixed crystal frequency to provide a wide range of output frequencies. 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. The Si554 ...