GENERAL DESCRIPTION

The M624 is a VCSO (Voltage Controlled SAW Oscillator) frequency source specifically designed for high-speed SONET/SDH applications for rates up to OC-768. Its integrated SAW (surface acoustic wave) delay line provides excellent phase noise performance and spectral purity, while requiring a low supply voltage (+3.3V). An extremely linear tuning range makes the M624 especially suited for phase-locked loop applications, which are extensively used in timing circuits and clock and data recovery in fiber-linked data systems. The SMT VCSO’s small size and minimal power requirements make it ideal for the miniturization applications that are emerging, without sacrificing performance.

FEATURES

• VCSO center frequency from 500 to 625MHz

• Low phase noise -100dBc/Hz @ 1kHz offset

• Superior SAW jitter performance and aging; jitter 0.015ps rms typical (12kHz-20MHz)

• Excellent frequency stability and tuning linearity

• Low power consumption (300 mW)

• Single 3.3V power supply

• Small 0.6 x 0.8 inch SMT (surface mount) package