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DS1085L Datasheet

  • DS1085L

  • 3.3V EconOscillator Frequency Synthesizer

  • 14頁(yè)

  • ETC

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Rev 0; 10/02
DS1086 Spread-Spectrum EconOscillator
General Description
The DS1086 EconOscillator鈩?is a programmable clock
generator that produces a spread-spectrum (dithered)
square-wave output of frequencies from 260kHz to
133MHz. The selectable dithered output reduces radi-
ated-emission peaks by dithering the frequency 2% or
4% below the programmed frequency. The DS1086 has
a power-down mode and an output-enable control for
power-sensitive applications. All the device settings are
stored in nonvolatile (NV) EEPROM memory allowing it
to operate in stand-alone applications.
Features
鈾?/div>
User-Programmable Square-Wave Generator
鈾?/div>
Frequencies Programmable from 260kHz to
133MHz
鈾?/div>
2% or 4% Selectable Dithered Output
鈾?/div>
Glitchless Output-Enable Control
鈾?/div>
2-Wire Serial Interface
鈾?/div>
Nonvolatile Settings
鈾?/div>
5V Supply
鈾?/div>
No External Timing Components Required
鈾?/div>
Power-Down Mode
鈾?/div>
10kHz Master Frequency Step Size
鈾?/div>
EMI Reduction
DS1086
Applications
Printers
Copiers
PCs
Computer Peripherals
Cell Phones
Cable Modems
Ordering Information
PART
DS1086U*
DS1086Z
PIN-PACKAGE
8
碌SOP
(118mil)
8 SO (150mil)
*
Future Product
Typical Operating Circuit
DITHERED 260kHz TO
133MHz OUTPUT
V
CC
N.C.
OUT
SPRD
V
CC
GND
DECOUPLING CAPACITORS
(0.1碌F and 0.01碌F)
*SDA AND SCL CAN BE CONNECTED DIRECTLY HIGH IF THE DS1086 NEVER NEEDS
TO BE PROGRAMMED IN-CIRCUIT, INCLUDING DURING PRODUCTION TESTING.
SCL*
V
CC
Pin Configuration
TOP VIEW
MICRO-
PROCESSOR
XTL1/OSC1
XTL2/OSC2
OUT
1
SPRD
V
CC
2
8
7
SCL
SDA
PDN
OE
DS1086
SDA*
PDN
OE
DS1086
3
6
5
GND
4
碌SOP/SO
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鈥檚 website at www.maxim-ic.com.

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