DS1089L Просмотр технического описания (PDF) - Maxim Integrated

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DS1089L

3.3V Center Spread-Spectrum EconOscillator™

Maxim Integrated 

DS1089L

3.3V Center Spread-Spectrum EconOscillator™

General Description

The DS1089L is a clock generator that produces a

spread-spectrum (dithered) square-wave output of fre-

quencies from 130kHz to 66.6MHz. The DS1089L is

shipped from the factory programmed at a specific

frequency. The DS1089L is pin-for-pin compatible with

the DS1087L, however, the DS1089L dithers at equal

percentages above and below the center frequency. The

user still has access to the internal frequency divider,

selectable ±1%, ±2%, ±4%, or ±8% dithered output, dith-

ering rate, and programmable output power-down/disable

mode through an I2C-compatible programming interface.

All the device settings are stored in nonvolatile (NV)

EEPROM allowing it to operate in stand-alone applica-

tions. The DS1089L also has power-down and output-en-

able control pins for power-sensitive applications.

Applications

●● Printers

●● Copiers

●● Computer Peripherals

●● POS Terminals

●● Cable Modems

Pin Configuration and Typical Operating Circuits appear at

end of data sheet.

Features

●● Factory-Programmed Square-Wave Generator from

33.3MHz to 66.6MHz

●● Center Frequency Remains Constant Independent of

Dither Percentage

●● No External Timing Components Required

●● EMI Reduction

●● Variable Dither Frequency

●● User Programmable Down to 130kHz with Divider

(Dependent on Master Oscillator Frequency)

●● ±1%, ±2%, ±4%, or ±8% Selectable Dithered Output

●● Glitchless Output-Enable Control

●● I2C-Compatible Serial Interface

●● Nonvolatile Settings

●● Power-Down Mode

●● Programmable Output Power-Down/Disable Mode

Ordering Information

PART

DS1089LU-yxx*

TEMP RANGE

-40°C to +85°C

*See Standard Frequency Options Table.

PIN-PACKAGE

8 µSOP (118 mil)

Standard Frequency Options

PART

DS1089LU-21G

DS1089LU-4CL

DS1089LU-22F

DS1089LU-23C

DS1089LU-450

DS1089LU-866

DS1089LU-yxx

FREQUENCY (MHz)

14.7456

18.432

24.576

33.3

50.0

66.6

Fixed up to 66.6

Add “/T” for Tape and Reel.

Custom frequencies available, contact factory.

SPREAD (±%)

1

2

1

1

2

4

1, 2, 4, or 8

DITHER FREQUENCY

fMOSC/4096

fMOSC/4096

fMOSC/2048

fMOSC/4096

fMOSC/4096

fMOSC/4096

fMOSC/2048 or 4096 or 8192

EconOscillator is a trademark of Maxim Integrated Products, Inc.

19-7501; Rev 3; 2/15

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