The DS1087L is a clock generator that produces a spread-spectrum (dithered) square-wave output of frequencies from 130kHz to 66.6MHz. The DS1087L is shipped from the factory programmed at a specific frequency 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 programming interface. All the device settings are stored in nonvolatile (NV) EEPROM allowing it to operate in stand-alone applications. The DS1087L has power-down and output-enable control pins for power-sensitive applications.

DS1087L: Functional Diagram

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Key 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

Applications/Uses

Cable Modems
Cell Phones
Computer Peripherals
Copiers
PCs
Printers

Parametric Specs

Part Number

f_OUT
(MHz)

f_OUT
(kHz)

Δf_OUT
(%)

User Prog. f_OUT

Spread Spectrum

V_CC
(V)

Reset Out

Oper. Temp.
(°C)

Package/Pins

Budgetary
Price

max

min

max

See Notes

DS1087L

130

±1.25 (0 to 70°C)

I²C

Yes

2.7 to 3.6

-40 to +85

UMAX/8

$0.92 @1k

See All Silicon Oscillators (17)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

DS1070K: Oscillator Evaluation Kit

Technical Documents

Tutorial 4993 Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface
App Note 3512 Automotive Applications for Silicon Spread-Spectrum Oscillators
App Note 2863 The Effects of Adjusting the DS1086L's Dither Span and Dither Frequency on EMC Measurements

Quality and Environmental Data

Product Reliability Reports: DS1087L.pdf
Lead-Free Package Tin (Sn) Whisker Reports

Quality And Environmental

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

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Related Resources

Related Packaging

Technical Docs

Type	ID	Title
Tutorial	4993	Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface
App Note	3512	Automotive Applications for Silicon Spread-Spectrum Oscillators
App Note	2863	The Effects of Adjusting the DS1086L's Dither Span and Dither Frequency on EMC Measurements

Technical Docs

Reference Designs

Type	ID	Title
Evaluation Board	4969	DS1070K Oscillator Evaluation Kit

Reference Designs

DS1087L

3.3V Spread-Spectrum EconOscillator

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Overview

Description