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M660 Datasheet(PDF) 1 Page - Integrated Circuit Systems |
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1 / 1 page M660 PB Rev 2.1 Revised 12Nov2003 Integ r ated Circuit Systems , Inc. ● Comm unications Modules ● www.icst.com ● tel (508) 852-5400 DUAL SAW, SELECTABLE FREQUENCY VCSO Integrated Circuit Systems, Inc. Product Br ief M660 GENERAL DESCRIPTION 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). FEATURES • M660-01 output frequencies from 125 to 175 MHz 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 PIN ASSIGNMENT (9 x 14 mm SMT) BLOCK DIAGRAM Sample of Available Output Frequencies VCSO Center Frequency1 (MHz) 1. Specify VCSO center frequency at time of order Applications 622.0800 SONET/SDH 625.0000 Gigabit Ethernet 644.5313 Gigabit Ethernet FEC 669.3266 SONET/SDH FEC M660 (T o p Vi ew ) 12 3 4 5 6 F_SEL VIN FOUT nFOUT SAW Delay Line Phase Shifter SAW Delay Line Phase Shifter M660 VCSO VCSO M660 Dual SAW, Selectable Frequency VCSO |
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