SM560

www.DataSheet4U.com SM560 Spread Spectrum Clock Generator Features 25- to 108-MHz operating frequency range Wide (9) range of spread selections Accepts clock and crystal inputs Low power dissipation 3.3V = 85 mw (50 MHz) Frequency Spread disable function Center Spread modulation Low cycle-to cycle jitter Eight-pin SOIC package Applications VGA controllers LCD panels and monitors Printers and multi-function devices (MFP) 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 1 4 pf REFERENCE DIVIDER PD CP LF Xin/CLK VDD VSS SSCLK FEEDBACK DIVIDER VCO 1 8 Xout S0 S1 SSCC SM560 2 3 4 7 6 5 MODULATION CONTROL Xout 8 8 pF VDD VSS 2 INPUT DECODER LOGIC DIVIDER AND MUX 3 4 SSCLK 5 6 7 SSCC S1 S0 Cypress Semiconductor Corporation Document #: 38-07020 Rev. *E 3901 North First Street San Jose CA 95134 408-943-2600 Revised June 25, 2004 SM560 Pin Definitions Pin 1 2 3 4 5 6 7 8 Name Xin/CLK VDD GND SSCLK SSCC S1 S0 Xout Type I P P O I I I O Positive power supply. Power supply ground. Modulated clock output. Spread Spectrum Clock Control (Enable/Disable) function. SSCG function is enabled when input is high and disabled when input is low. This pin is pulled high internally. Tri-level Logic input control pin used to select frequency and bandwidth. Frequency/bandwidth selection and Tri-level Logic programming. See F...