General Description
The DS1089L is a clock generator that produces a
spread spectrum (dithered) square-wave output of fre-
quencies from 130kHz to 66.6MHz. The DS1089L is
shipped from the factory programmed at a specific fre-
quency. The DS1089L is pin-for-pin compatible with the
DS1087L, however, the DS1089L dithers at equal per-
centages above and below the center frequency. The
user still has access to the internal frequency divider,
selectable ±1%, ±2%, ±4%, or ±8% dithered output,
dithering rate, and programmable output power-
down/disable mode through an I
2
C-compatible pro-
gramming interface. All the device settings are stored
in nonvolatile (NV) EEPROM allowing it to operate in
stand-alone applications. The DS1089L also has
power-down and output-enable control pins for power-
sensitive applications.
Applications
Automotive Infotainment
Printers
Copiers
Computer Peripherals
POS Terminals
Cable Modems
Features
♦ Factory-Programmed Square-Wave Generator
from 33.3MHz to 66.6MHz
♦ Center Frequency Remains Constant Independent
of Dither Percentage
♦ No External Timing Components Required
♦ EMI Reduction
♦ Variable Dither Frequency
♦ User Programmable Down to 130kHz with Divider
(Dependent on Master Oscillator Frequency)
♦ ±1%, ±2%, ±4%, or ±8% Selectable Dithered
Output
♦ Glitchless Output-Enable Control
♦ I
2
C-Compatible Serial Interface
♦ Nonvolatile Settings
♦ Power-Down Mode
♦ Programmable Output Power-Down/Disable Mode
DS1089L
3.3V Center Spread-Spectrum EconOscillator™
______________________________________________ Maxim Integrated Products 1
Rev 2; 5/06
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.
*See Standard Frequency Options Table.
Ordering Information
Pin Configuration and Typical Operating Circuits appear at end of data sheet.
