Advanced programmable with Spread Spectrum Accepts reference clock inp

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Advanced programmable with Spread Spectrum Accepts reference clock inp

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PicoEMI Programmable Spread Spectrum Clock
Advanced programmable with Spread Spectrum Accepts reference clock input: 10-200MHz Output frequency range: 166MHz 2.5V 200MHz 3.3V operation. Programmable Spread Spectrum modulation magnitude: Center Spread: ±0.125% ±2.0% ±0.125% steps Down Spread: -0.25% -4.0% 0.25% steps Four pre-programmed configurations. Spread Spectrum On/Off selection. Programmable output drive (4mA, 8mA, 16mA) Cycle Cycle jitter. Accepts 0.1V reference signal input voltage. Single 2.5V 3.3V, power supply Operating temperature range from -40C Available 6-pin SOT23 GREEN/RoHS compliant packages.
DESCRIPTION
PL671-05 advanced programmable clock Spread Spectrum clock generators (PSSCG), members PhaseLink's PicoPLLProgrammable Clock family. PL671-05 offer 200MHz outputs, allow programming modulation type (center down Spread), well modulation magnitudes (±0.125 ±2.0% -0.25 -4.0%) choose from. addition, CSEL[0:1] pins used toggle device thru pre-programmed configurations. Spread Spectrum modulation turned `ON/OFF', allowing completing design with PL671-05/-06 having assurance turning `ON' modulation, becomes issue. frequency modulation PL671-05 greatly reduces fundamental harmonic frequencies' peak magnitude, therefore reducing system level Electro Magnetic Interference (EMI), much 20dB.
CONFIGURATION
Note: Denotes Pull-up resistor
BLOCK DIAGRAM
47745 Fremont Blvd., Fremont, California 94538 (510) 492-0990 (510) 492-0991 www.phaselink.com 7/9/07 Page
Programming Logic
PicoEMI Programmable Spread Spectrum Clock
PACKAGE ASSIGNMENT
Name CLK0 CSEL0^, CSEL1^ PL671-05 SOT23-6L PL671-06 SOT23-6L Type Description Programmable Clock Output with spread spectrum (SST turned off). connection. Reference input pin. connection (2.25~3.63V) Optional, pre-programmed configuration input control pins, allow switching between pre-defined configurations. Both pins incorporate pull resistor.
PROGRAMMING PARAMETERS
Clock Output Frequency where CLK0= 6-bit Odd/Even divider Modulation Magnitude (Spread Percentage) programmable modulation magnitudes choose from: Fly" Configuration 'On-The-Fly' switchabe predefined configurations. Output Drive Strength Three optional drive strengths choose from: Low: Std: (default) High: 16mA
Center Spread: ±0.125% ±2.0% ±0.125% steps CSEL[0:1] Configuration Down Spread: -0.25% Selection input -4.0% 0.25% steps
FUNCTIONAL DESCRIPTION
PL671-05/-06 highly featured, very flexible, advanced programmable designs high performance, lowpower Spread Spectrum modulation applications. PL671-05/-06 accept reference clock input 10MHz 200MHz capable producing modulated outputs 200MHz. These flexible designs allow PL671-05/-06 deliver generated frequency, (Ref Clk) frequency CLK0. CSEL0 CSEL1 allows device choose from different modulation magnitude settings providing range spread settings choose from. Some design features PL671-05 mentioned below. Programming PL671-05/-06 fully programmable. equipped with 8-bit input frequency divider (R-Counter), 11-bit frequency feedback loop divider (M-Counter). output transferred 6-bit post Odd/Even divider (P-Counter). output frequency determined following formula M)/(R*P). Modulation Magnitude Type PL671-05/-06 provide following programmable capabilities Modulation Type Modulation Magnitude (Spread Percentage): Modulation Modulation Programming Type Magnitude Steps Center Spread ±0.125% thru ±2.00% ±0.125% Down Spread -0.25% thru -4.00% -0.25%
47745 Fremont Blvd., Fremont, California 94538 (510) 492-0990 (510) 492-0991 www.phaselink.com 7/9/07 Page
PicoEMI Programmable Spread Spectrum Clock
Modulation Rate PL671-05/-06 modulation rate defined (Ref Frequency) divided times R-counter, i.e. Modulation Rate 8R). rate changed choosing alternate R-Counter settings. Clock Output (CLK0) output CLK0 configured output /P), (Ref Frequency) output, output. output drive level programmed Drive (4mA), Standard Drive (8mA) High Drive (16mA). output frequency programmed 200MHz 3.3V (166MHz 2.5V). CSEL[0:1] Configuration Selectors PL671-05/-06 capability programmed with distinct configurations toggle Fly" between these configurations using selector pads CSEL0 CSEL1. example would part that ±0.25%, ±0.50%, ±1.0% ±1.5% based CSEL0 CSEL1 configuration. CSEL0 CSEL1 both incorporate pull resistor giving default condition logic "1".
LAYOUT RECOMMENDATIONS
following guidelines assist with performance optimized design:
Signal Integrity Termination Considerations
Keep traces short! Trace Inductor. With capacitive load this equals ringing! Long trace Transmission Line. Without proper termination this will cause reflections looks like ringing Design long traces "striplines" "microstrips" with defined impedance. Match trace side avoid reflections bouncing back forth.
Decoupling Power Supply Considerations
Place decoupling capacitors close possible pin(s) limit noise from power supply Multiple pins should decoupled separately best performance. Addition ferrite bead series with help prevent noise from other board sources Value decoupling capacitor frequency dependant. Typical values 0.1F designs using frequencies 50MHz 0.01F designs using frequencies 50MHz.
47745 Fremont Blvd., Fremont, California 94538 (510) 492-0990 (510) 492-0991 www.phaselink.com 7/9/07 Page
PicoEMI Programmable Spread Spectrum Clock
ELECTRICAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS PARAMETERS Supply Voltage Range Input Voltage Range Output Voltage Range Soldering Temperature (Green package) Data Retention Storage Temperature Ambient Operating Temperature* SYMBOL MIN. -0.5 -0.5 -0.5 MAX. +0.5 +0.5 UNITS Year
Exposure device under conditions beyond limits specified Maximum Ratings extended periods cause permanent damage device affect product reliability. These conditions represent stress rating only, functional operations device these other conditions above operational limits noted this specification implied. *Operating temperature guaranteed design. Parts tested commercial grade only.
SPECIFICATIONS
PARAMETERS Input (FIN) Frequency Input (FIN) Signal Amplitude Input (FIN) Signal Amplitude Output Frequency Settling Time Output Enable Time Output Rise Time Output Fall Time Duty Cycle Cycle Cycle Jitter =3.3V =2.5V Internally coupled (High Frequency) Internally coupled (Low Frequency) 3.3V <50MHz, 2.5V <40MHz =3.3V =2.5V power-up (after increases over 2.25V) Function; 15pF Load 15pF Load, 10/90% Standard Drive 15pF Load, 10/90% High Drive 15pF Load, 90/10% Standard Drive 15pF Load, 90/10% High Drive cyc-cyc (Over output frequency range 3.3V) CONDITIONS MIN. TYP. MAX. UNITS
Note: Jitter performance depends programming parameters.
47745 Fremont Blvd., Fremont, California 94538 (510) 492-0990 (510) 492-0991 www.phaselink.com 7/9/07 Page
PicoEMI Programmable Spread Spectrum Clock
SPECIFICATIONS
PARAMETERS Supply Current, Dynamic, with Loaded Outputs Operating Voltage Output Voltage Output High Voltage Output Current, Drive Output Current, Standard Drive Output Current, High Drive SYMBOL +4mA (Std. Drive) -4mA (Std. Drive) 0.4V, 2.4V 0.4V, 2.4V 0.4V, 2.4V CONDITIONS 25MHz, 3.3V, load=15pF, (PDB=1) PDB=0 2.25 MIN. TYP. MAX. 3.63 UNITS
PACKAGE DRAWINGS (GREEN PACKAGE COMPLIANT)
SOT23-6L Symbol Dimension Min. Max. 1.05 1.35 0.05 0.15 1.00 1.20 0.30 0.50 0.08 0.20 2.80 3.00 1.50 1.70 2.60 3.00 0.35 0.55 0.95
Pin1
47745 Fremont Blvd., Fremont, California 94538 (510) 492-0990 (510) 492-0991 www.phaselink.com 7/9/07 Page
PicoEMI Programmable Spread Spectrum Clock
ORDERING INFORMATION (GREEN PACKAGE COMPLIANT)
part ordering, please contact Sales Department: 47745 Fremont Blvd., Fremont, 94538, Tel: (510) 492-0990 Fax: (510) 492-0991
PART NUMBER
order number this device combination following: Part number, Package type Operating temperature range
PL671-0X-XXX
PART NUMBER DIGIT Code
NONE= TUBE R=TAPE REEL TEMPERATURE C=COMMERCIAL INDUSTRIAL
PACKAGE TYPE T=SOT23-6L
PhaseLink will assign unique 3-digit code each approved programmed part number.
Part Number /Order Number PL671-05-XXXTC-R PL671-06-XXXTC-R
Marking F4XXX F5XXX
Package Option 6-Pin SOT23 (Tape Reel) 6-Pin SOT23 (Tape Reel)
Note: `XXX' designates marking identifier that, times, could independent part number. Please consult your PhaseLink Sales Representative marking information.
PhaseLink Corporation, reserves right make changes products specifications, both time without notice. information furnished Phaselink believed accurate reliable. However, PhaseLink makes guarantee warranty concerning accuracy said information shall responsible loss damage whatever nature resulting from reliance upon this product. LIFE SUPPORT POLICY: PhaseLink's products authorized critical components life support devices systems without express written approval President PhaseLink Corporation.
Solder reflow profile available
47745 Fremont Blvd., Fremont, California 94538 (510) 492-0990 (510) 492-0991 www.phaselink.com 7/9/07 Page

Advanced programmable with Spread Spectrum Accepts reference clock inp

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