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PL671-02

Part Number	PL671-02
Manufacturer	PLL
Description	Spread Spectrum Clock Generator
Published	Jul 31, 2009
Detailed Description	www.DataSheet4U.com PicoEMI T M Spread Spectrum Clock Generator FEATURES  Advanced programmable PLL with Spread Spectr...
Datasheet	PL671-02 PDF File

Overview

www.
DataSheet4U.
com PicoEMI T M Spread Spectrum Clock Generator FEATURES  Advanced programmable PLL with Spread Spectrum  Reference Clock input o 1MHz to 200MHz  Output Frequency o <200MHz  Two programmable I/O pins o PDB for Power Down function o CSEL for Configuration Select o CLK1/CLK2 additional clock outputs  Programmable Output Drive  Low Cycle to Cycle jitter  Single 2.
5V or 3.
3V ± 10% power supply  Available in 6-pin SOT23 or Thin SOT (TSOT) GREEN/RoHS compliant packaging .
PIN CONFIGURATION Note: ^ Denotes 60k Ω Pull-up resistor DESCRIPTION The PL671-02 is an advanced Spread Spectrum clock generator (SSCG), and a member of PhaseLink’s PicoPLL ™ Programmable Clock family.
The PL671-02 offers up to three 200MHz outputs, and allows for programming the modulation type (Center or Down Spread) as well as 16 modulation magnitudes (±0.
125% to ±2.
0% or -0.
25% to -4.
0%).
In addition, the CSEL pin can be used to toggle the device between 2 pre-programmed configurations.
The option of being able to turn ‘ON/OFF’ the Spread Spectrum modulation allows for completing a design with PL671-02 and having the assurance of turning ‘ON’ the EMI modulation, if EMI becomes an issue.
The PL671-02’s frequency modulation greatly reduces the fundamental and harmonic frequencies’ peak magnitude, therefore reducing the system level Electro Magnetic Interference (EMI), by as much as 20dB BLOCK DIAGRAM SST Modulation R-Counter 9-bits ÷8 ÷8 Phase Detector Charge Pump Loop Filter VCO Modulation Magnitude* PDB CLK[0:2] CSEL * Optional Pre-defined Modulation Magnitude Control M-Counter 11-bits FVCO = FREF * (M/R) P-Counter 6-bits Odd/Even /1, /2 /1, /2, /4 FOUT = FVCO / P Programmable Function 47745 Fremont Blvd.
, Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.
phaselink.
com Rev 8/1/2008 Page 1 www.
DataSheet4U.
com PicoEMI T M Spread Spectrum Clock Generator KEY PROGRAMMING PARAMETERS CLK[ 0:2 ] Output Frequency FOUT = FREF * M / (R * P) where M =11...

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