GENERAL DESCRIPTION
   The M685 is a dual SAW, selectable frequency VCSO frequency source for low-jitter clock generation. An integrated SAW (surface acoustic wave) delay line implements the high-Q VCO (voltage controlled oscillator) function, which results in low output phase noise and very low jitter. The M685-01 is available in a range of center frequencies from 125 to 175 MHz.

FEATURES
◆ Two integrated SAW devices and selectable output
   frequency; supports multi-rate optical interfaces
◆ M685-01 output frequencies from 125 to 175 MHz
   M685-02 output frequencies from 500 to 700 MHz
   (Specify center frequencies at time of order)
◆ Industry-standard Kvco for full compatibility
◆ Low phase jitter 0.2ps rms typical for the M685-02
   (50kHz to 80MHz)
◆ Differential 3.3V LVPECL output
◆ Single 3.3V power supply
◆ Small 5 x 7.5mm SMT (surface mount) package