CDCS501

CDCS501 www.ti.com..................................................................................................................................................................................................... SCAS874 – APRIL 2009 SSC Clock Generator/Buffer FEATURES 1 Part of a Family of Easy to use Clock Generator Devices With Optional SSC SSC Capable Clock Generator / Buffer SSC Controllable via 3 External Pins – ±0% to ±1.5% Center Spread 1 External Control Pin for SSC ON / OFF Selection 40 MHz to 108 MHz Single-Ended LVCMOS Input Single 3.3V Device Power Supply Wide Temperature Range – 40°C to 85°C Low Space Consumption by 8 Pin TSSOP Package BLOCK DIAGRAM V DD APPLICATIONS Consumer and Industrial Applications Requiring EMI Reduction through Spread Spectrum Clocking PACKAGE IN 1 SSC_SEL 0 2 SSC_SEL 1 3 GND 4 CDCS501 8 VDD 7 SSC_SEL 2 6 OUT 5 SSC_ON GND IN SSC_SEL 0 SSC_SEL 1 SSC_SEL 2 SSC_ON LVCMOS SSC Generator LV CMOS SPREAD LOOK-UP TABLE OUT DESCRIPTION The CDCS501 is a spread spectrum capable, LVCMOS Input Clock Buffer for EMI reduction. The device is designed to counter common EMI problems in modern electronic designs. It accepts a 3.3V LVCMOS signal at the input and spread this signal by a small amount, centered around the input frequency. The amount of spread can be selected via 3 control pins. The Functional Table contains detailed information on the amount of spread. A 4th control pin can be used to activate or deactivate the...