SL38000
Programmable 4-PLL CG with VCXO and SSCG
Key Features
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4 Programmable PLLs with up to 9 Clock Outputs
and 2 REFCLKs
Wide 2.5V to 3.3V +/-10% power supply range
CLKOUTs support 3.3V to 2.5V or 1.8V +/-10%
Low power dissipation and low jitter
Programmable VCXO and SSCG options
EEPROM or I2C Programmability
Programmable Center or Down Spread Modulation
from 0.25 to 5.0%
8 to 48 MHz external crystal range
8 to 166 MHz external clock input range
Programmable 1 to 200 MHz clock output range
Integrated internal voltage regulator
Programmable PD#/OE/SSON#/FS functions
Programmable CL at XIN and XOUT pins
Programmable output rise and fall times
28-pin TSSOP package with commercial and
industrial temperature ranges
Description
The SL38000 a fully integrated 4 PLL programmable low
power Clock Generator with SSCG and VCXO functions
used for reducing Electromagnetic Interference (EMI) and
general purpose frequency synthesizing. The product is
designed using SpectraLinear proprietary programmable
EProClock™
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.
Up to 9 output clock frequencies and 2 REFOUT clocks,
Spread %, output rise and fall times for each clock outputs,
crystal load, modulation frequency and PD#/OE/SSON#/FS
functions can be programmed to meet the needs of wide
range of applications. The SL38000 operates from 2.5V to
3.3V power supply voltage range. The output clocks
(CLKOUTs) can support 3.3 to 2.5V or 1.8V +/-10%. The
product is offered in 28-pin TSSOP package with
commercial and industrial grades.
Benefits
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Peak EMI reduction of 8 to 16 dB
Fast time-to-market
Cost Reduction
Reduction of PCB layers
Eleminates the need for XOs and VCXOs
Applications
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Printers, MFPs, Digital Copiers
DTV, HDTV, DVD-R/W and STB
General Purpose Frequency Synthesising
Block Diagram
VDDO
CLKOUT-1 or MF-1
XIN/CLKIN
XOUT
VIN
VDDA
XTAL
OSCILLATOR
(XO or VXCO)
(Optional)
PLL-1
Output
Drivers with
Multi
Function I/O
and
Output
Drivers Drive
Strength
Control
CLKOUT-2 or MF-2
CLKOUT-3 or MF-3
CLKOUT-4 or MF-4
CLKOUT-5 or MF-5
CLKOUT-6 or MF-6
CLKOUT-7 or MF-7
REFOUT-1 or MF-9
PLL-2
Voltage
Regulator-1
To PLLs
Input Mux
and Control
Logic
5
VSSA
VDDX
Voltage
Regulator-2
VSSX
SS-PLL-3
To XO
and Core
SS-PLL-4
REFOUT-2 or MF-13
VSSO
SS Logic
Control
CLKOUT-8, SDATA or
MF-10
CLKOUT-9, SCLK or
MF-11
Mux and Div
Control
I2C Interface
Input Logic
MEMORY
Configuration
Configuration
Logic
MF-8 or MF13
Rev 1.1, August 7, 2008
Page 1 of 12
2200 Laurelwood Road, Santa Clara, CA 95054 Tel: (408) 855-0555 Fax: (408) 855-0550 www.SpectraLinear.com
SPECTRALINEAR [ SPECTRALINEAR INC ]
