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FEATURES

APPLICATIONS

PACKAGE

SSC_SEL 0

1

8

VDD

SSC_SEL 1

2

7

OUT

GND

3

6

SSC_ON

IN

4

5

CDCS501

SSC_SEL 2

BLOCK DIAGRAM

GND

OUT

SSCGenerator

IN

LVCMOS

SPREAD

LOOK-UP

TABLE

SSC_SEL 0

SSC_SEL 1

SSC_SEL 2

LV

CMOS

SSC_ON

DESCRIPTION

CDCS501

SSC Clock Generator/Buffer

• Consumer and Industrial Applications

• Part of a Family of Easy to use Clock

Requiring EMI Reduction through Spread

Generator Devices With Optional SSC

Spectrum Clocking

• 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

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 Spread

Spectrum Clock Generator.

Selecting SSC_ON = off will turn the Spread Spectrum Clock Generator off only. The device will still pass the

LVCMOS signal that’s presented at its input trough to its output. This pin is low active.

The wide operating frequency range covers most commonly used midrange Audio and Video frequencies. The

CDCS501 operates in 3.3V environment.

It is characterized for operation from –40°C to 85°C, and available in an 8-pin TSSOP package.

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.