Rev 0; 11/03
3.3V Spread-Spectrum EconOscillator
General Description
Features
The DS1086L EconOscillator™ is a 3.3V programmable
clock generator that produces a spread-spectrum
(dithered) square-wave output of frequencies from
130kHz to 66.6MHz. The selectable dithered output
reduces radiated-emission peaks by dithering the fre-
quency 0.5%,1%, 2%, 4%, or 8% below the pro-
grammed frequency. The DS1086L has a power-down
mode and an output-enable control for power-sensitive
applications. All the device settings are stored in non-
volatile (NV) EEPROM memory allowing it to operate in
stand-alone applications.
♦ User-Programmable Square-Wave Generator
♦ Frequencies Programmable from 130kHz to
66.6MHz
♦ 0.5%, 1%, 2%, 4%, or 8% Selectable Dithered
Output
♦ Adjustable Dither Rate
♦ Glitchless Output-Enable Control
♦ 2-Wire Serial Interface
♦ Nonvolatile Settings
Applications
♦ 2.7V to 3.6V Supply
Printers
♦ No External Timing Components Required
♦ Power-Down Mode
Copiers
PCs
Computer Peripherals
Cell Phones
Cable Modems
♦ 5kHz Master Frequency Step Size
♦ EMI Reduction
♦ Industrial Temperature Range: -40°C to +85°C
Ordering Information
TEMP RANGE
PART
PIN-PACKAGE
-40°C to +85°C
DS1086LU
8 µSOP (118 mil)
Typical Operating Circuit
Pin Configuration
TOP VIEW
V
CC
DITHERED 130kHz TO
66.6MHz OUTPUT
µP
SCL*
XTL1/OSC1
XTL2/OSC2
OUT
OUT
1
2
3
4
8
7
6
5
SCL
SDA
PDN
OE
V
CC
SPRD
SDA*
PDN
OE
N.C.
DS1086L
SPRD
V
CC
DS1086L
V
CC
GND
GND
DECOUPLING CAPACITORS
(0.1µF and 0.01µF)
*SDA AND SCL CAN BE CONNECTED DIRECTLY HIGH IF THE DS1086L NEVER NEEDS
TO BE PROGRAMMED IN-CIRCUIT, INCLUDING DURING PRODUCTION TESTING.
µSOP
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.