DS1087L Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated

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DS1087L

3.3V Spread-Spectrum EconOscillator

Dallas Semiconductor -> Maxim Integrated 

Rev 1; 11/03

3.3V Spread-Spectrum EconOscillator

General Description

The DS1087L is a clock generator that produces a

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

quencies from 130kHz to 66.6MHz. The DS1087L is

shipped from the factory programmed at a specific fre-

quency and spread-spectrum percentage. The user still

has access to an internal frequency divider, selectable

2% or 4% dithered output, and programmable output

power-down/disable mode through a 2-wire program-

ming interface. All the device settings are stored in non-

volatile (NV) EEPROM allowing it to operate in

stand-alone applications. The DS1087L has power-

down and output-enable control pins for power-sensi-

tive applications.

Printers

Copiers

PCs

Computer Peripherals

Cell Phones

Cable Modems

Applications

Features

♦ Factory Programmed Square-Wave Generator

from 130kHz to 66.6MHz

♦ No External Timing Components Required

♦ EMI Reduction

♦ 2.7V to 3.6V Supply

♦ User Programmable Down to 130kHz with Divider

(Dependent on Master Oscillator Frequency)

♦ 2% or 4% Selectable Dithered Output

♦ Glitchless Output-Enable Control

♦ 2-Wire Serial Interface

♦ Nonvolatile Settings

♦ Power-Down Mode

♦ Programmable Output Power-Down/Disable Mode

PART

DS1087LU-yxx

Ordering Information

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

8 µSOP (118 mils)

Standard Frequency Options

PART

DS1087LU-202

DS1087LU-402

DS1087LU-210

DS1087LU-216

DS1087LU-266

DS1087LU-466

DS1087LU-yxx

FREQUENCY (MHz)

2.0480

2.0480

10.0

16.6

66.6

66.6

Fixed up to 66.6

SPREAD (%)

2

4

2

2

2

4

2 or 4

Custom frequencies and over 20 standard frequencies avail-

able, contact factory.

EconOscillator is a trademark of Dallas Semiconductor.

Typical Operating Circuits appear at end of data sheet.

TOP VIEW

Pin Configuration

OUT 1

SPRD 2

VCC 3

GND 4

DS1087L

8 SCL

7 SDA

6 PDN

5 OE

µSOP (118 mils)

______________________________________________ Maxim Integrated Products 1

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.

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