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DS1087LU-402 Datasheet

  • DS1087LU-402

  • 3.3V Spread-Spectrum EconOscillator

  • 12頁

  • DALLAS   DALLAS

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Rev 1; 11/03
3.3V Spread-Spectrum EconOscillator
General Description
The DS1087L is a clock generator that produces a
spread-spectrum (dithered) square-wave output of fre-
quencies from 130kHz to 66.6MHz. The DS1087L is
shipped from the factory programmed at a specific fre-
quency and spread-spectrum percentage. The user still
has access to an internal frequency divider, selectable
2% or 4% dithered output, and programmable output
power-down/disable mode through a 2-wire program-
ming interface. All the device settings are stored in non-
volatile (NV) EEPROM allowing it to operate in
stand-alone applications. The DS1087L has power-
down and output-enable control pins for power-sensi-
tive applications.
Features
鈾?/div>
Factory Programmed Square-Wave Generator
from 130kHz to 66.6MHz
鈾?/div>
No External Timing Components Required
鈾?/div>
EMI Reduction
鈾?/div>
2.7V to 3.6V Supply
鈾?/div>
User Programmable Down to 130kHz with Divider
(Dependent on Master Oscillator Frequency)
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>
Power-Down Mode
鈾?/div>
Programmable Output Power-Down/Disable Mode
DS1087L
Applications
Printers
Copiers
PCs
Computer Peripherals
Cell Phones
Cable Modems
Ordering Information
PART
DS1087LU-yxx
TEMP RANGE
-40擄C to +85擄C
PIN-PACKAGE
8 碌SOP (118 mils)
Standard Frequency Options
PART
DS1087LU-202
DS1087LU-402
DS1087LU-210
DS1087LU-216
DS1087LU-266
DS1087LU-466
DS1087LU-yxx
FREQUENCY (MHz)
2.0480
2.0480
10.0
16.6
66.6
66.6
Fixed up to 66.6
SPREAD (%)
2
4
2
2
2
4
2 or 4
SPRD
V
CC
2
OUT
1
Pin Configuration
TOP VIEW
8
7
SCL
SDA
PDN
OE
DS1087L
3
6
5
GND
4
Custom frequencies and over 20 standard frequencies avail-
able, contact factory.
碌SOP
(118 mils)
EconOscillator is a trademark of Dallas Semiconductor.
Typical Operating Circuits appear at end of data sheet.
______________________________________________
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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