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General Description

The MAX9476 low-cost, high-performance clock syn-

thesizer with an 8kHz input reference clock provides six

buffered LVTTL clock outputs at 35.328MHz. The clock

synthesizer can be used to generate the clocks for sys-

tems using T1, E1, T3, E3, and xDSL.

The MAX9476 features a phase-lock loop (PLL) that uses

a voltage-controlled crystal oscillator (VCXO). The inter-

nal PLL phase locks the external crystal (35.328MHz) to

the 8kHz input reference clock. In addition, this device

generates a jitter-suppressed output that provides a bet-

ter source for the reference clock relay.

The MAX9476 is available in a 24-pin TSSOP package

and operates over the extended operating temperature

range of -40°C to +85°C and a single +3V to +3.6V

power-supply range. For using lower value external

crystals, refer to the MAX9486 data sheet.

Applications

Telecom Equipment Using T1, E1, T3, E3, and

ISDN Protocols

xDSL Equipment in CO with Interface to the

Telecom Protocols

Features

♦ 8kHz Input-Reference CLK

♦ 4ps

RMS

(typ) Output Jitter

♦ High-Jitter Rejection on the Reference CLK

♦ Synthesizer Locks to the 8kHz Reference with a

±100ppm Range

♦ Output Frequency: 35.328MHz

♦ Six Buffered LVTTL Low-Jitter Outputs

♦ One 8kHz Reference CLK Relay Output

♦ +3.3V Supply Operation

♦ 24-Pin TSSOP Package

MAX9476

Low-Jitter, 8kHz Reference

Clock Synthesizer Outputs 35.328MHz

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3530; Rev 0; 1/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

PART

TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX9476EUG

-40°C to +85°C

24 TSSOP

U24-1

CLK1

GND

CLK2

DDP

REIN

REO

TOP VIEW

CLK3

GND

CLK4X2

GNDP

CLK5

GND

CLK6SETI

LP1

LP2

GND

TSSOP

MAX9476

SHDN

Pin Configuration

MAX9476

CLK2

CLK1

DDP

GNDP

REO

CLK6

CLK5

CLK4

CLK3

GND

LP1 LP2

REIN

SET

SETI

SHDN

Typical Application Circuit

1 2 3 4 5 6 7 8

Low-Jitter, 8kHz Reference 1

Resumo do Conteúdo

Página 1 - Low-Jitter, 8kHz Reference

General DescriptionThe MAX9476 low-cost, high-performance clock syn-thesizer with an 8kHz input reference clock provides sixbuffered LVTTL clock outpu

Página 2

MAX9476Low-Jitter, 8kHz ReferenceClock Synthesizer Outputs 35.328MHz2 ________________________________________________________________________________

Página 3

MAX9476Low-Jitter, 8kHz ReferenceClock Synthesizer Outputs 35.328MHz__________________________________________________________________________________

Página 4

MAX9476Low-Jitter, 8kHz ReferenceClock Synthesizer Outputs 35.328MHz4 ________________________________________________________________________________

Página 5

MAX9476Low-Jitter, 8kHz ReferenceClock Synthesizer Outputs 35.328MHz__________________________________________________________________________________

Página 6

MAX9476Detailed DescriptionThe MAX9476 is a high-performance clock synthesizerwith an 8kHz input reference clock. This device gener-ates six identical

Página 7

PLL Loop FilterThe PLL contains an integrated VCXO that uses anexternal crystal to track the input reference signal andattenuate input jitter. Figure

Página 8

MAX9476Low-Jitter, 8kHz ReferenceClock Synthesizer Outputs 35.328MHzMaxim cannot assume responsibility for use of any circuitry other than circuitry e

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Rainbow-electronics MAX9476 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Comunicação Rainbow-electronics MAX9476. Rainbow Electronics MAX9476 User Manual Manual do Utilizador

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