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| Integrated Circuit Systems, Inc. Product Brief M660 DUAL SAW, SELECTABLE FREQUENCY VCSO PIN ASSIGNMENT (9 x 14 mm SMT) nFOUT 5 FOUT 4 3 GND VCC 6 1 VIN 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). M660 (Top View) 2 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 Sample of Available Output Frequencies VCSO Center Frequency1 (MHz) 622.0800 625.0000 644.5313 669.3266 Applications SONET/SDH Gigabit Ethernet Gigabit Ethernet FEC SONET/SDH FEC 1. Specify VCSO center frequency at time of order BLOCK DIAGRAM M660 SAW Delay Line VCSO Phase Shifter F_SEL VIN SAW Delay Line FOUT nFOUT VCSO Phase Shifter F_SEL M660 PB Rev 2.1 M660 Dual SAW, Selectable Frequency VCSO Revised 12Nov2003 Integrated Circuit Systems, Inc. Communications Modules w w w. i c s t . c o m tel (508) 852-5400 |
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