DS1089L
3.3V Center Spread-Spectrum EconOscillator™
General Description
Features
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
● 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)
2
mode through an I C-compatible programming interface.
● ±1%, ±2%, ±4%, or ±8% Selectable Dithered Output
● Glitchless Output-Enable Control
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.
2
● I C-Compatible Serial Interface
● Nonvolatile Settings
Applications
● Power-Down Mode
● Printers
● Copiers
● Programmable Output Power-Down/Disable Mode
● Computer Peripherals
● POS Terminals
● Cable Modems
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS1089LU-yxx*
-40°C to +85°C
8 µSOP (118 mil)
Pin Configuration and Typical Operating Circuits appear at
end of data sheet.
*See Standard Frequency Options Table.
Standard Frequency Options
PART
DS1089LU-21G
DS1089LU-4CL
DS1089LU-22F
DS1089LU-23C
DS1089LU-450
DS1089LU-866
DS1089LU-yxx
FREQUENCY (MHz)
SPREAD (±%)
DITHER FREQUENCY
14.7456
1
f
f
f
f
f
f
/4096
MOSC
MOSC
MOSC
MOSC
MOSC
MOSC
18.432
2
/4096
/2048
/4096
/4096
/4096
24.576
1
33.3
1
50.0
2
66.6
4
Fixed up to 66.6
1, 2, 4, or 8
f
/2048 or 4096 or 8192
MOSC
Add “/T” for Tape and Reel.
Custom frequencies available, contact factory.
EconOscillator is a trademark of Maxim Integrated Products, Inc.
19-7501; Rev 3; 2/15