SILICON LABS 554EJ000434DG

The Si554 quad-frequency VCXO utilizes 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 IC-based VCXO is factory-configurable for a wide variety of user specifications including frequency, supply voltage, output format, tuning slope, and temperature stability. Specific configurations are factory-programmed at time of shipment, thereby eliminating the long lead times associated with custom oscillators.

• Available with any-rate output frequencies from 10–945 MHz and selected frequencies to 1.4 GHz
• Four selectable output frequencies
• 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 CMOS, LVPECL, LVDS, and CML outputs
• 3.3, 2.5, and 1.8 V supply options
• Industry-standard 5x7 mm package and pinout
• Pb-free/RoHS-compliant

• SONET/SDH
• xDSL
• 10 GbE LAN / WAN
• Low jitter clock generation
• Optical modules
• Clock and data recovery