CDCS501 Datasheet, PDF (1/10 Pages) Texas Instruments – SSC Clock Generator/Buffer

CDCS501
www.ti.com..................................................................................................................................................................................................... SCAS874 – APRIL 2009
SSC Clock Generator/Buffer
FEATURES
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• 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 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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated