Accepts Crystal Reference Clock input Crystal: 10MHz 40MHz Reference C

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Accepts Crystal Reference Clock input Crystal: 10MHz 40MHz Reference C

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PicoEMI Programmable Spread Spectrum Clock
Accepts Crystal Reference Clock input Crystal: 10MHz 40MHz Reference Clock: 1MHz 200MHz Output Frequency 200MHz Center Down Spread Spectrum Modulation Four selectable pre-programmed configurations 100ps Cycle Cycle jitter Single 2.5V 3.3V, power supply Operating temperature range from -40C Available SOP-8L GREEN/RoHS compliant Package
CONFIGURATION
XIN/FIN CSEL1^ CSEL0^ SOP-8L
Note: Denotes Pull-up resistor
XOUT CLK0
DESCRIPTION
PL671-24 high performance programmable spread spectrum clock. allows programming modulation type (Center Down Spread), modulation magnitudes (±0.125% ±2.0% -0.25% -4.0%) Multiplier ratio (x1, x4). CSEL[0:1] pins switch between four pre-programmed configurations adding flexibility. CSEL1 CSEL0 (Xtal) (REF) Configurable Center Down Configurable Center: ±0.125% ±2.0% Down: -0.25% -4.0% 200MHz (x1, configurable) Input (MHz) Spread Spectrum Type Spread Spectrum Modulation Amplitude Output (MHz)
BLOCK DIAGRAM
Modulation XIN/FIN XOUT Xtal RCounter Phase Detector MCounter CSEL[0:1] CLK0 Built-in Crystal load Cap. external caps required. Charge Pump Loop Filter
47745 Fremont Blvd., Fremont, California 94538 (510) 492-0990 (510) 492-0991 www.phaselink.com 7/25/07 Page
PicoEMI Programmable Spread Spectrum Clock
PACKAGE ASSIGNMENT
Name XIN/FIN SOP-8L Type Crystal Reference input connection Selector pins used toggle between four pre-programmed configurations. These pins have internal pull resistor. There four possible pre-defined configurations chosen from following combination. Spread Spectrum modulation Type (Center Down) Spread Spectrum modulation Amplitude Center Spread ±0.125% ±2.0% ±0.125% steps Down Spread -0.25% -4.0% 0.25% steps) Frequency Multiplier (x1, Output Clock Drive Strength (4mA, 8mA, 16mA) Spread Spectrum Clock Output Connection connection (2.25~3.63V) Crystal output pin. Connect when using FIN. Description
CSEL[1:0]
CLK0 XOUT
LAYOUT RECOMMENDATIONS
following guidelines assist with performance optimized design:
Signal Integrity Termination Considerations
Keep traces short possible. 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 7/25/07 Page
PicoEMI Programmable Spread Spectrum Clock
47745 Fremont Blvd., Fremont, California 94538 (510) 492-0990 (510) 492-0991 www.phaselink.com 7/25/07 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 Crystal Input Frequency(XIN) Input (FIN) Frequency Input (FIN) Signal Amplitude Input (FIN) Signal Amplitude Output Frequency Settling 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) 15pF Load, 10/90% Standard Drive 15pF Load, 10/90% High Drive 15pF Load, 90/10% Standard Drive 15pF Load, 90/10% High Drive Over output frequency range 3.3V CONDITIONS Fundamental Crystal 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 7/25/07 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 2.25 MIN. TYP. MAX. 3.63 UNITS
CRYSTAL SPECIFICATIONS
PARAMETERS Fundamental Crystal Resonator Frequency Crystal Loading Rating Maximum Sustainable Drive Level Operating Drive Level Metal Crystal Small Crystal Shunt Capacitance Shunt Capacitance SYMBOL (xtal) MIN. TYP. MAX. UNITS
PACKAGE DRAWINGS (GREEN PACKAGE COMPLIANT)
SOP-8L Symbol Dimension Min. Max. 1.35 1.75 0.10 0.25 1.25 1.50 0.33 0.53 0.19 0.27 4.80 5.00 3.80 4.00 5.80 6.20 0.40 0.89 1.27
47745 Fremont Blvd., Fremont, California 94538 (510) 492-0990 (510) 492-0991 www.phaselink.com 7/25/07 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
PL671-24-XXX
PART NUMBER DIGIT Code PACKAGE TYPE S=SOP-8L
NONE= TUBE R=TAPE REEL TEMPERATURE C=COMMERCIAL (0°C 70°C) INDUSTRIAL (-40°C 85°C)
PhaseLink will assign unique 3-digit code each approved programmed part number.
Part/Order Number PL671-24-XXXSC PL671-24-XXXSC-R
Marking P671-24 P671-24
Package Option 8-Pin (Tube) 8-Pin (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 7/25/07 Page

Accepts Crystal Reference Clock input Crystal: 10MHz 40MHz Reference C

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