3EQHM572-D-15.990N-D2.3 datasheet, PDF

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3EQHM572-D-15.990N-D2.3: DescriptionCMOS Output Clock Oscillator, ROHS COMPLIANT, MINIATURE, SMD, 4 PIN; CategoryPassive components oscillator; File Size270KB，3 Pages; ManufacturerEuroquartz; Websitehttp://www.euroquartz.co.uk/; Environmental Compliance

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3EQHM572-D-15.990N-D2.3 Overview

CMOS Output Clock Oscillator, ROHS COMPLIANT, MINIATURE, SMD, 4 PIN

3EQHM572-D-15.990N-D2.3 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Objectid	1261204525
Reach Compliance Code	compliant
JESD-609 code	e4
Oscillator type	CMOS
Terminal surface	Gold (Au) - with Nickel (Ni) barrier

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EURO

QUARTZ

Provides from 8dB to 15dB reduction in system EMI

‘Drop-in’ replacement for standard clocks

Choice of modulation rate and spread

Miniature package: 7.0 mm x 5.0 mm x 1.4mm

N Group parts provide a low cost EMI reduction solution

3EQHM572N Low EMI Oscillator

Page 1 of 3

7 x 5 x 1.4mm SMD - Group 'N'

In electrical systems the principal cause of electro-

magnetic interference (EMI) is the system clock

oscillator. Traditional methods of 'patching-up' systems

with too high a level of EMI is to use ferrite beads,

filters, ground planes, metal shielding and similar costly

methods, However, the most efficient and economic

method to reduce EMI is to reduce it at source: replace

the system clock ocillator with a low EMI clock oscillator.

Compared with conventional clock oscillators, Spread

Spectrum (Dithered) Oscillators can reduce EMI by as

much as 16dB. The part is a 'drop-in' replacement for a

standard clock oscillator hence there is no requirement

to re-design existing PCBs.

DESCRIPTION

EQHM572 series low EMI oscillators can reduce system EMI from 8dB

to 16dB. The oscillators are a ‘drop-in’ replacement for standard

oscillators. EMI reduction is achieved by the use of Spread Spectrum

Technology whereby the mode energy is spread over a wider

bandwidth. The modulation carrier frequency, operating in the kHz

region, makes the process transparent to the oscillator frequency.

There is a choice of modulation rates and spread to suit application

requirements.

SPREAD SPECTRUM TECHNOLOGY

Unlike a conventional clock oscillator, in a Spread Spectrum Clock

Oscillator the mode energy is spread over a wider bandwidth. This is

achieved by the frequency modulation technique. The controlled

modulation process may be applied to the 'down' side of the nominal

frequency (known as

DOWN SPREAD,)

or spread equally either side

of nominal (CENTRE

SPREAD).

Down Spread is preferred if over-

clocking would cause a problem to the system.

APPLICATIONS

Printers, Multiple Function Printers (MPCs)

Digital Copiers; PDAs

Networking: LAN/WAN; Routers

Storage Systems (CD-ROM, VCD, DVD, HDD)

Scanners; Modems; Projectors

Embedded Systems

Musical Instruments

Automotive: GPS car navigation systems

LCD PC Monitors; LSD TVs

ADSL; PCMCIA

Still Digital Cameras (SDCs)

Medical devices

MODULATION TYPES - EXAMPLES

EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE

Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk

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