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Dallas Semiconductor - Spread-Spectrum EconOscillator

Numéro de référence DS1086
Description Spread-Spectrum EconOscillator
Fabricant Dallas Semiconductor 
Logo Dallas Semiconductor 





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DS1086 fiche technique
Rev 1; 9/03
DS1086 Spread-Spectrum EconOscillator
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
www.DataSheet4U.com
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
Ordering Information
PART
DS1086U*
DS1086Z
*Future Product
PIN-PACKAGE
8 µSOP (118mil)
8 SO (150mil)
Typical Operating Circuit
MICRO-
PROCESSOR
DITHERED 260kHz TO
133MHz OUTPUT
VCC
XTL1/OSC1
XTL2/OSC2
VCC OUT
N.C. SPRD
VCC
GND
DS1086
SCL*
SDA*
PDN
OE
DECOUPLING CAPACITORS
(0.1µF 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.
TOP VIEW
Pin Configuration
OUT 1
SPRD 2
VCC 3
GND 4
DS1086
8 SCL
7 SDA
6 PDN
5 OE
µSOP/SO
EconOscillator is a trademark of Dallas Semiconductor.
______________________________________________ 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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