sl15100 SpectraLinear Inc, sl15100 Datasheet

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sl15100

Manufacturer Part Number
sl15100
Description
Programmable Spread Spectrum Clock Generator Sscg
Manufacturer
SpectraLinear Inc
Datasheet
Key Features
Applications
Block Diagram
Rev 2.0, August 10, 2008
2200 Laurelwood Road, Santa Clara, CA 95054 Tel: (408) 855-0555 Fax: (408) 855-0550 www.SpectraLinear.com
• Low power dissipation
• Wide 2.5V to 3.3V +/-10% power supply range
• Programmable outputs from 3 to 200MHz
• Low Jitter
• Programmable Center or Down Spread Modulation
• 8 to 48 MHz external crystal range
• 8 to 166 MHz external clock range
• Integrated internal voltage regulator
• Programmable PD#/OE/SSON#/FS functions
• Programmable CL at XIN and XOUT pins
• Programmable output rise and fall times
• Programmable modulation frequency from 25 to
• Printers, MFPs
• Digital Copiers
• NBPCs and LCD Monitors
• Routers, Servers and Switchers
• HDTV and DVD-R/W
Programmable Spread Spectrum Clock Generator (SSCG)
from 0.25 to 5.0%
120 kHz
- 7.7mA-typ at 66MHz and VDD=3.3V
- 6.8mA-typ at 66MHz and VDD=2.5V
- 110ps at 66MHz
Description
The SL15100 a programmable low power Spread
Spectrum Clock Generator (SSCG) used for reducing
Electromagnetic Interference (EMI). The product is
designed using SpectraLinear proprietary EProClock™
programmable phase-locked loop (PLL) and Spread
Spectrum Clock (SSC) technology to synthesize and
modulate the input clock. The modulated clock can
significantly reduce the measured EMI levels, and leading
to the compliance with regulatory agency requirements.
The output clock frequency, Spread %, output rise and fall
times, crystal load, modulation frequency and
PD#/OE/SSON#/FS functions can be programmed to meet
the needs of wide range of applications. The SL15100
operates from 2.5V to 3.3V power supply voltage range.
The product is offered in 8-pin TSSOP package with
commercial and industrial grades.
Refer to SL15300 for up to four (4) programmable clock
outputs and for 1.8V power supply operation.
Benefits
• Peak EMI reduction of 8 to 16 dB
• Fast time-to-market
• Cost Reduction
• Reduction of PCB layers
• Eleminates the need for higher order crystals (Xtals)
and crystal oscillators (XOs)
SL15100
Page 1 of 16

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sl15100 Summary of contents

Page 1

... The output clock frequency, Spread %, output rise and fall times, crystal load, modulation frequency and PD#/OE/SSON#/FS functions can be programmed to meet the needs of wide range of applications. The SL15100 operates from 2.5V to 3.3V power supply voltage range. The product is offered in 8-pin TSSOP package with commercial and industrial grades. ...

Page 2

... This pin can be programmed as SSCLK2 or REFCLK2. Programmable SSON# or Frequency Select (FS) Control pin. If SSCG# function is programmed: Spread-on=0(Low) or Spread-off=1(High function is programmed: The clock frequencies can be switched between two sets of frequencies as programmed. SSON weakly pulled low to VSS. SL15100 Page ...

Page 3

... REFOUT is the same frequency as the input reference clock or divide by from without spread. The set of frequencies in Table 1 is given as en example, using 48MHz crystal. The SL15100 also allows a fan-out of 2, meaning that Pins 6 and 7 can be programmed to the same frequencies with or without spread such that F1=F2 and F3=F4. FS ...

Page 4

... VIN=GND, Pins 4 and 8 IIL If no pull-up/down resister used VIN=VDD or GND FIN=30MHz, REFCLK=30MHz SSCLK=66MHz, PD#/OE=VDD SSON#=GND, CL=0 PD#=GND Pins 6 and 7 Minimum setting value Maximum setting value Resolution (programming steps) Pins 4 and 8 SSCLK/REFCLK , Pins 6 and 7 SL15100 Min Max Unit -0.5 4.2 V -0.5 VDD+0 °C -40 85 ° ...

Page 5

... CL=15pF 80% of VDD Programmable, VDD=3.3 CL=15pF 80% of VDD CLKIN=SSCLK=166MHz, 2%Spread REFCLK=Off CLKIN=SSCLK=66MHz, 2%Spread REFCLK=Off CLKIN=SSCLK=33MHz, 2%Spread REFCLK=Off CLKIN=SSCLK=166MHz, 2%Spread REFCLK=On CLKIN=SSCLK=66MHz, 2%Spread REFCLK=On CLKIN=SSCLK=33MHz, 2%Spread REFCLK=On CLKIN=SSCLK=166MHz, 2%Spread REFCLK=On SL15100 Min Typ Max Unit MHz 8 - 166 MHz 3 - 200 MHz ...

Page 6

... VIN=VDD, Pins 4 and pull-up/down resister used VIN=GND, Pins 4 and pull-up/down resister used VIN=VDD or GND FIN=30MHz, REFCLK=30MHz SSCLK=66MHz, PD#/OE=VDD SSON#=GND, CL=0 PD#=GND Pins 6 and 7 Minimum programming value Maximum programming value Resolution (programming steps) SL15100 - 100 130 ps - 135 180 ps - 150 350 ...

Page 7

... Programmable, VDD=2.5 CL=15pF 80% of VDD Programmable, VDD=2.5 CL=15pF 80% of VDD Programmable, VDD=2.5 CL=15pF 80% of VDD CLKIN=SSCLK=166MHz, 2%Spread REFCLK=Off CLKIN=SSCLK=66MHz, 2%Spread, REFCLK=Off CLKIN=SSCLK=33MHz, 2%Spread, REFCLK=Off CLKIN=SSCLK=166MHz, 2%Spread REFCLK=On CLKIN=SSCLK=66MHz, 2%Spread, REFCLK=On SL15100 - Min Typ Max Unit MHz ...

Page 8

... CMOS Level, Pins 4 and 8 IOH=8mA , Pins 6 and 7 IOL=8mA, Pins 6 and 7 VIN=VDD, Pins 4 and pull-up/down resister used VIN=GND, Pins 4 and pull-up/down resister used VIN=VDD or GND FIN=30MHz, REFCLK=30MHz SSCLK=66MHz, PD#/OE=VDD SSON#=GND, CL=0 SL15100 - 200 260 110 ps - 110 140 ...

Page 9

... Programmable, VDD=3.3 CL=15pF 80% of VDD Programmable, VDD=3.3 CL=15pF 80% of VDD Programmable, VDD=3.3 CL=15pF 80% of VDD Programmable, VDD=3.3 CL=15pF 80% of VDD Programmable, VDD=3.3 CL=15pF 80% of VDD CLKIN=SSCLK=166MHz, 2%Spread REFCLK=Off CLKIN=SSCLK=66MHz, 2%Spread REFCLK=Off SL15100 - 90 120 μA - μ ...

Page 10

... VIL CMOS Level, Pins 4 and 8 VIH CMOS Level, Pins 4 and 8 IOH=6mA , Pins 6 and 7 IOL=6mA, Pins 6 and 7 VIN=VDD, Pins 4 and 8 IIH If no pull-up/down resister used VIN=GND, Pins 4 and 8 IIL If no pull-up/down resister used SL15100 - 130 175 ps - 110 145 ps - 115 155 ...

Page 11

... Programmable, VDD=2.5 CL=15pF 80% of VDD Programmable, VDD=2.5 CL=15pF 80% of VDD Programmable, VDD=2.5 CL=15pF 80% of VDD Programmable, VDD=2.5 CL=15pF 80% of VDD Programmable, VDD=2.5 CL=15pF 80% of VDD CLKIN=SSCLK=166MHz, 2%Spread REFCLK=Off SL15100 100 150 300 kΩ - 7.0 8 120 μA ...

Page 12

... Time for VDD reaching minimum specified value and monolithic power supply ramp Time from OE falling edge to Hi-Z at outputs (Asynchronous) Time from OE falling edge to Hi-Z at outputs (Asynchronous) SSCLK-1/2 Variation of programmed Spread % Programmable, 31.5 kHz standard SL15100 - 125 160 ps - 125 160 ps - 145 ...

Page 13

... Programming PCin and PCout to 32pF assures that this crystal sees an equivalent load of 18pF and no other external crystal load capacitor is needed. Deviating from the crystal load specification could cause an increase in frequency accuracy in ppm. Refer to the Table 5 for the recommended crystal specifications. Rev 2.0, August 10, 2008 PCin(pF) =PCout(pF)= [(CL(pF) – Cp(pF)/2 SL15100 Page ...

Page 14

... Load for +/-0 ppm Fo resonance value 20 40 100 Ohm F-Range: 8.0 to 12.999 MHz 12 Ohm F-Range: 13.0 to 19.999 MHz Ohm F-Range: 20.0 to 48.000 MHz - - 200 µW F-Range: 8.0 to 19.999 MHz - - 150 µW F-Range: 20.0 to 48.000 MHz - 4 5.4 pF SMD Xtals - 5 7.2 pF Through Hole (Leaded) Xtals SL15100 Comments Page ...

Page 15

... Parameter Symbol θ Thermal Resistance θ Junction to Ambient θ Thermal Resistance θ Junction to Case Rev 2.0, August 10, 2008 Condition Still air JA1 1m/s air flow JA2 3m/s air flow JA3 Independent of air flow JC SL15100 Min Typ Max Unit - 110 - °C/W - 100 - °C °C °C/W ...

Page 16

... Linear Inc. Spectra Linear Inc. reserves the right to change any circuitry or specification without notice. Rev 2.0, August 10, 2008 Shipping Package TBD Tube TBD Tape and Reel TBD Tube TBD Tape and Reel SL15100 Package Temperature 8-pin TSSOP 0 to 85°C 8-pin TSSOP 0 to 85°C 8-pin TSSOP -40 to 85°C 8-pin TSSOP -40 to 85°C ...

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