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DS1089LU-450 Datasheet

  • DS1089LU-450

  • 3.3V Center Spread`Spectrum EconOscillator

  • 12頁(yè)

  • MAXIM   MAXIM

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Rev 1; 9/05
3.3V Center Spread-Spectrum EconOscillator鈩?/div>
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
鹵1%, 鹵2%, 鹵4%,
or
鹵8%
dithered output,
dithering rate, and programmable output power-
down/disable mode through an I
2
C鈩?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.
Features
鈾?/div>
Factory-Programmed Square-Wave Generator
from 33.3MHz to 66.6MHz
鈾?/div>
Center Frequency Remains Constant Independent
of Dither Percentage
鈾?/div>
No External Timing Components Required
鈾?/div>
EMI Reduction
鈾?/div>
Variable Dither Frequency
鈾?/div>
User Programmable Down to 130kHz with Divider
(Dependent on Master Oscillator Frequency)
鈾?/div>
鹵1%, 鹵2%, 鹵4%,
or
鹵8%
Selectable Dithered
Output
鈾?/div>
Glitchless Output-Enable Control
鈾?/div>
I
2
C-Compatible Serial Interface
鈾?/div>
Nonvolatile Settings
鈾?/div>
Power-Down Mode
鈾?/div>
Programmable Output Power-Down/Disable Mode
DS1089L
Applications
Automotive Infotainment
Printers
Copiers
Computer Peripherals
POS Terminals
Cable Modems
Ordering Information
PART
DS1089LU-yxx*
TEMP RANGE
-40擄C to +85擄C
PIN-PACKAGE
8 碌SOP (118 mil)
*See
Standard Frequency Options Table.
Pin Configuration and Typical Operating Circuits appear at end of data sheet.
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
SPREAD (鹵%)
1
2
1
1
2
4
1, 2, 4, or 8
DITHER FREQUENCY
f
MOSC
/ 4096
f
MOSC
/ 4096
f
MOSC
/ 2048
f
MOSC
/ 4096
f
MOSC
/ 4096
f
MOSC
/ 4096
f
MOSC
/ 2048 or 4096 or 8192
Add 鈥?T鈥?for Tape and Reel.
Custom frequencies available, contact factory.
EconOscillator is a trademark of Dallas Semiconductor Corp.
I
2
C is a trademark of Philips Corp. Purchase of I
2
C components from Maxim Integrated Products, Inc., or one of its sublicensed
Associated Companies, conveys a license under the Philips I
2
C Patent Rights to use these components in an I
2
C system, provided
that the system conforms to the I
2
C Standard Specification as defined by Philips.
______________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

DS1089LU-450 產(chǎn)品屬性

  • Maxim Integrated Products

  • DS1089

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