SM561 Spread Spectrum Clock Generator Features • • • • • • • • • 54- to 166-MHz operating frequency range Wide (9) range of spread selections Accepts clock and crystal inputs Low power dissipation 3.
3V = 165 mw.
(Fin = 120 MHz) Frequency spread disable function Center spread modulation Low cycle-to-cycle jitter Eight-pin SOIC package Applications • High-resolution VGA controllers • LCD panels and monitors • Workstations and servers Benefits • Peak electromagnetic interference (EMI) reduction by 8 to 16 dB • Fast time to market • Cost reduction Block Diagram Pin Configuration 250 K Xin/CLK Xin/ CLK 1 4 pf REFERENCE DIVIDER PD CP LF 1 2 3 4 8 7 6 5 Xout S0 S1 SSCC VDD VSS MODULATIO...

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