Rainbow-electronics MAX9489 User Manual download pdf

General Description

The MAX9489 clock generator provides multiple clock

outputs, ideal for network routers. The MAX9489 pro-

vides 15 buffered clock outputs, each independently

programmable to any of 10 individual frequencies:

133MHz, 125MHz, 100MHz, 83MHz, 80MHz, 66MHz,

62.5MHz, 50MHz, 33MHz, or 25MHz. All of the outputs

are single-ended LVCMOS. The MAX9489 is controlled

through its I

C™ interface.

At power-up, the frequency of output CLK1 is set by the

tri-level input SEL to 100MHz, 125MHz, or 133MHz,

while all other outputs are logic low. All outputs are then

programmable to any available frequency through the

C interface. Additionally, all output frequencies are

adjustable up or down, by a margin of 5% or 10%,

through the I

C interface.

The MAX9489 requires a 25MHz reference that can be

either a crystal or an external clock signal. The

MAX9489 requires a +3.0V to +3.6V power supply and

is available in a 32-pin thin QFN package with an

exposed pad for heat removal.

Applications

Network Routers

Telecom/Networking Equipment

Storage Area Networks/Network Attached

Storage

Features

♦ 15 LVCMOS Outputs with 10 Independently

Programmable Frequencies: 133MHz, 125MHz,

100MHz, 83MHz, 80MHz, 66MHz, 62.5MHz, 50MHz,

33MHz, and 25MHz

♦ 25MHz Crystal or Clock Input Reference

♦ Programmable Through I

C Interface

♦ Programmable Output Frequency Margin of ±5%

or ±10%

♦ Pin-Selectable Power-Up Frequency for CLK1

Output: 100MHz, 125MHz, or 133MHz

♦ Low Output Period Jitter: < 48ps

RMS

♦ Output-to-Output Skew < 200ps

♦ Available in 32-Lead, 5mm x 5mm x 0.8mm,

Thin QFN Package

♦ Operates from +3.0V to +3.6V Power Supply

♦ Power Dissipation 450mW (typ)

♦ Extended Temperature Range: -40°C to +85°C

MAX9489

Multiple-Output Network Clock Generator

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3385; Rev 0; 8/04

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.

PART TEMP RANGE PIN-PACKAGE

MAX9489ETJ -40°C to +85°C

32 Thin QFN-EP*

5mm x 5mm x 0.8mm

GND 1

SCL

SDA

SEL

AGND

CLK12

CLK11

CLK10

CLK9

CLK8

CLK7

CLK1

CLK2

CLK3

CLK4

CLK5

CLK6

SA1

SA0

GND

CLK15

CLK14

CLK13

MAX9489

THIN QFN-EP

TOP VIEW

EXPOSED PAD (GND)

Pin Configuration

MAX9489

25MHz

10pF

SDA

0.1µF

SCL

SA0

SA1

SEL

AGND

GND

CLK15

CLK1

+3.3V +3.3V

SERIAL

INTERFACE

CLOCK

OUTPUTS

0.1µF x 5

Typical Operating Circuit

C is a trademark of Philips Corp.

Purchase of I

C components of Maxim Integrated Products, Inc.,

or one of its sublicensed Associated Companies, conveys a

license under the Philips I

C Patent Rights to use these compo-

nents in an I

C system, provided that the system conforms to the

C Standard Specification as defined by Philips.

*EP = Exposed pad.

1 2 3 4 5 6 ... 10 11

Summary of Contents

Page 1 - 5mm x 5mm x 0.8mm

General DescriptionThe MAX9489 clock generator provides multiple clockoutputs, ideal for network routers. The MAX9489 pro-vides 15 buffered clock outp

Page 2 - DC ELECTRICAL CHARACTERISTICS

MAX9489Multiple-Output Network Clock Generator10 ______________________________________________________________________________________REGISTER ADDRES

Page 3

MAX9489Multiple-Output Network Clock GeneratorMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a

Page 4 - SERIAL INTERFACE TIMING

MAX9489Multiple-Output Network Clock Generator2 _______________________________________________________________________________________ABSOLUTE MAXIMU

Page 5 - = 3.3V, T

MAX9489Multiple-Output Network Clock Generator_______________________________________________________________________________________ 3DC ELECTRICAL C

Page 6 - Pin Description

MAX9489Multiple-Output Network Clock Generator4 _______________________________________________________________________________________Note 1: All DC

Page 7 - Detailed Description

MAX9489Multiple-Output Network Clock Generator_______________________________________________________________________________________ 5Typical Operati

Page 8 - C Address Selection

MAX9489Multiple-Output Network Clock Generator6 _______________________________________________________________________________________PIN NAME FUNCTI

Page 9 - Chip Information

MAX9489Multiple-Output Network Clock Generator_______________________________________________________________________________________ 7Detailed Descri

Page 10

MAX9489Multiple-Output Network Clock Generator8 _______________________________________________________________________________________Writing to the

Page 11 - Package Information

MAX9489Multiple-Output Network Clock Generator_______________________________________________________________________________________ 9Setting the Clo

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Rainbow-electronics MAX9489 User Manual

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Summary of Contents

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