DS1089L
3.3V Center Spread-Spectrum EconOscillator™
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
frequency. The DS1089L is pin-for-pin compatible with
the DS1087L, however, the DS1089L dithers at equal
percentages above and below the center frequency. The
user still has access to the internal frequency divider,
selectable ±1%, ±2%, ±4%, or ±8% dithered output, dith-
ering rate, and programmable output power-down/disable
mode through an I2C-compatible programming interface.
All the device settings are stored in nonvolatile (NV)
EEPROM allowing it to operate in stand-alone applica-
tions. The DS1089L also has power-down and output-en-
able control pins for power-sensitive applications.
Applications
●● Printers
●● Copiers
●● Computer Peripherals
●● POS Terminals
●● Cable Modems
Pin Configuration and Typical Operating Circuits appear at
end of data sheet.
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
●● I2C-Compatible Serial Interface
●● Nonvolatile Settings
●● Power-Down Mode
●● Programmable Output Power-Down/Disable Mode
Ordering Information
PART
DS1089LU-yxx*
TEMP RANGE
-40°C to +85°C
*See Standard Frequency Options Table.
PIN-PACKAGE
8 µSOP (118 mil)
Standard Frequency Options
PART
DS1089LU-21G
DS1089LU-4CL
DS1089LU-22F
DS1089LU-23C
DS1089LU-450
DS1089LU-866
DS1089LU-yxx
FREQUENCY (MHz)
14.7456
18.432
24.576
33.3
50.0
66.6
Fixed up to 66.6
Add “/T” for Tape and Reel.
Custom frequencies available, contact factory.
SPREAD (±%)
1
2
1
1
2
4
1, 2, 4, or 8
DITHER FREQUENCY
fMOSC/4096
fMOSC/4096
fMOSC/2048
fMOSC/4096
fMOSC/4096
fMOSC/4096
fMOSC/2048 or 4096 or 8192
EconOscillator is a trademark of Maxim Integrated Products, Inc.
19-7501; Rev 3; 2/15