General Description

The DS1086 EconOscillator™ is a programmable clock

generator that produces a spread-spectrum (dithered)

square-wave output of frequencies from 260kHz to

133MHz. The selectable dithered output reduces radi-

ated-emission peaks by dithering the frequency 2% or

4% below the programmed frequency. The DS1086 has

a power-down mode and an output-enable control for

power-sensitive applications. All the device settings are

stored in nonvolatile (NV) EEPROM memory allowing it

to operate in stand-alone applications.

Applications

Printers

Copiers

PCs

Computer Peripherals

Cell Phones

Cable Modems

Features

♦ User-Programmable Square-Wave Generator

♦ Frequencies Programmable from 260kHz to

133MHz

♦ 2% or 4% Selectable Dithered Output

♦ Glitchless Output-Enable Control

♦ 2-Wire Serial Interface

♦ Nonvolatile Settings

♦ 5V Supply

♦ No External Timing Components Required

♦ Power-Down Mode

♦ 10kHz Master Frequency Step Size

♦ EMI Reduction

DS1086 Spread-Spectrum EconOscillator

______________________________________________ Maxim Integrated Products

1

PDN

OE

GND

1

2

8

7

SCL

SDA

SPRD

OUT

µSOP/SO

TOP VIEW

3

4

6

5

DS1086

Pin Configuration

Ordering Information

DS1086

XTL1/OSC1

MICRO-

PROCESSOR

XTL2/OSC2

DITHERED 260kHz TO

133MHz OUTPUT

DECOUPLING CAPACITORS

(0.1

µF and 0.01µF)

*SDA AND SCL CAN BE CONNECTED DIRECTLY HIGH IF THE DS1086 NEVER NEEDS

TO BE PROGRAMMED IN-CIRCUIT, INCLUDING DURING PRODUCTION TESTING.

SPRD

OUT

GND

N.C.

SCL*

SDA*

PDN

OE

Typical Operating Circuit

Rev 1; 9/03

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.

*

Future Product

PART

PIN-PACKAGE

DS1086U*

8

µSOP (118mil)

DS1086Z

8 SO (150mil)

EconOscillator is a trademark of Dallas Semiconductor.