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

SL38000

Programmable 4-PLL CG with VCXO and SSCG

Key Features

• 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

Applications

• Printers, MFPs, Digital Copiers

• DTV, HDTV, DVD-R/W and STB

• General Purpose Frequency Synthesising

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

• 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

Block Diagram

PLL-1

PLL-2

SS-PLL-3

SS-PLL-4

Input Mux

and Control

Logic

Output

Drivers with

Multi

Function I/O

and

Output

Drivers Drive

Strength

Control

XTAL

OSCILLATOR

(XO or VXCO)

SS Logic

Control

Mux and Div

Control

MEMORY

Configuration

Configuration

Logic

I2C Interface

Input Logic

XIN/CLKIN

XOUT

5

CLKOUT-1 or MF-1

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

REFOUT-2 or MF-13

MF-8 or MF13

CLKOUT-8, SDATA or

MF-10

CLKOUT-9, SCLK or

MF-11

VSSO

VDDO

Voltage

Regulator-1

VDDA

VSSA

To PLLs

Voltage

Regulator-2

VDDX

VSSX

To XO

and Core

VIN

(Optional)