CY25566

CY25566 Spread Spectrum Clock Generator Features 25- to 200-MHz operating frequency range Wide range of spread selections (9) Accepts clock or crystal inputs Provides four clocks — SSCLK1a — SSCLK1b — SSCLK2 — REFOUT Low-power dissipation — 3.3V = 70 mW (typical @ 40 MHz, no load) Center spread modulation Low cycle-to cycle jitter 16-pin SOIC package Applications High-resolution VGA controllers LCD panels and monitors Printers and MFPs Benefits Peak EMI reduction by 8 to 16 dB Fast time to market Cost reduction Block Diagram Pin Configuration REFOFF 2 300K 3 REFOUT Xin/ CLK 1 REFERENCE DIVIDER XIN/CLKIN REFOFF 1 2 16 15 XOUT SSCLK2 VSS PD CP Loop Filter REFOUT VDD 3 4 5 6 7 8 CY25566 14 13 S0 12 S1 11 VSS Xout 16 VSS MODULATION CONTROL FEEDBACK DIVIDER vco S2 S3 SSCLK1a 10 SSCC 9 SSCLK1b VDD 4 INPUT DECODER LOGIC VDD VDD DIVIDER & MUX 8 SSCLK1a 9 SSCLK1b /2 15 SSCLK2 VSS 5 VSS 11 VSS 14 20 K 20 K RANGE CONTROL 20 K VSS 20 K VSS 10 SSCC 12 S1 13 S0 6 S2 7 S3 Cypress Semiconductor Corporation www.DataSheet4U.net Document #: 38-07429 Rev. *B 3901 North First Street San Jose CA 95134 408-943-2600 Revised October 26, 2005 CY25566 Pin Description Pin 1 2 3 4 5, 11, 14 6 7 8 9 10 Name XIN/CLKIN REFOFF REFOUT VDD VSS S2 S3 SSCLK1a SSCLK1b SSCC Type I I O P G I I O O I Description Clock or Crystal connection input. Refer to Table 1, Table 2, and Table 3 for input frequency range selection. Input pin enab...