Rainbow Electronics DS1087L - Manual

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.
Applications
Printers
Copiers
PCs
Computer Peripherals
Cell Phones
Cable Modems
Features
♦ Factory Programmed Square-Wave Generator
from 130kHz to 66.6MHz
♦ No External Timing Components Required
♦ EMI Reduction
♦ 2.7V to 3.6V Supply
♦ User Programmable Down to 130kHz with Divider
(Dependent on Master Oscillator Frequency)
♦ 2% or 4% Selectable Dithered Output
♦ Glitchless Output-Enable Control
♦ 2-Wire Serial Interface
♦ Nonvolatile Settings
♦ Power-Down Mode
♦ Programmable Output Power-Down/Disable Mode
DS1087L
3.3V Spread-Spectrum EconOscillator
______________________________________________ Maxim Integrated Products 1
PDN
OE GND
1
2
8
7
SCL
SDA SPRD
V CC
OUT
µSOP (118 mils)
TOP VIEW
3
4
6
5
DS1087L
Pin Configuration
Ordering Information
Rev 0; 7/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART TEMP RANGE PIN-PACKAGE
DS1087LU-yxx -40°C to +85°C 8 µSOP (118 mils)
EconOscillator is a trademark of Dallas Semiconductor.
Typical Operating Circuits appear at end of data sheet.
Standard Frequency Options
PART FREQUENCY (MHz) SPREAD (%)
DS1087LU-202 2.0480 2
DS1087LU-402 2.0480 4
DS1087LU-210 10.0 2
DS1087LU-216 16.6 2
DS1087LU-266 66.6 2
DS1087LU-466 66.6 4
DS1087LU-yxx Fixed up to 66.6 2 or 4
Custom frequencies and over 20 standard frequencies avail-
able, contact factory.