DS1086 Datasheet, PDF (1/14 Pages) Dallas Semiconductor – DS1086 Spread-Spectrum EconOscillator

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
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
V_CC
XTL1/OSC1
V_CC ^OUT
SCL*
XTL2/OSC2 N.C.
SPRD _DS1086 SDA*
V_CC
PDN
GND
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
V_CC 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.