Product Brief Integrated Circuit Systems, Inc. M660 DUAL SAW, SELECTABLE FREQUENCY VCSO FEATURES FOUT 6 5 4 M660 1 2 3 F_SEL GND (Top View) Sample of Available Output Frequencies • M660-01 output frequencies from 125 to 175 MHz • • • • • • • • nFOUT The M660-01 is a dual SAW, selectable frequency VCSO 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 M660-01 is available in a range of center frequencies from 125 to 175MHz. The M660-02 is available in a range of center frequencies from 500 to 700MHz. Minimum pull-range is +50 ppm (wider pull-range is available). The M660 is well suited for phase-locked loop implementations, clock and data recovery circuits, and other timing applications in telecom and optical fiber networking systems (e.g., OC-48, OC-192). VCC PIN ASSIGNMENT (9 x 14 mm SMT) VIN GENERAL DESCRIPTION M660-02 output frequencies from 500 to 700 MHz (Specify center frequency at time of order) Two integrated SAW devices Selectable output frequency Supports multi-rate optical interface requirements Low phase jitter 0.37ps rms typical (12kHz to 20MHz) Low phase noise -70dBc/Hz @ 1kHz offset Differential 3.3V LVPECL output Single 3.3V power supply Small 9 x 14 mm SMT (surface mount) package VCSO Center Frequency1 (MHz) Applications 622.0800 SONET/SDH 625.0000 Gigabit Ethernet 644.5313 Gigabit Ethernet FEC 669.3266 SONET/SDH FEC 1. Specify VCSO center frequency at time of order BLOCK DIAGRAM M660 SAW Delay Line VCSO Phase Shifter FOUT VIN nFOUT SAW Delay Line VCSO Phase Shifter F_SEL M660 PB Rev 2.1 Revised 12Nov2003 M660 Dual SAW, Selectable Frequency VCSO Integrated Circuit Systems, Inc. ● Communications Modules ● w w w. i c s t . c o m ● tel (508) 852-5400