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SY58033U

Micrel, Inc.

M9999-072810

hbwhelp@micrel.com or (408) 955-1690

DESCRIPTION

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Precision 1:8, 400mV LVPECL fanout buffer

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Guaranteed AC performance over temperature and

voltage:

• Clockfrequencyrange: DCto5.5GHz

• <20psskew

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Low-jitterperformance:

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100kLVPECLcompatibleoutputs

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Fullydifferentialinputs/outputs

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Acceptsaninputsignalaslowas100mV

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DC-coupledandAC-coupleddifferentialinputs:

(LVPECL,LVDS,andCML)

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Powersupply2.5V±5%or3.3V±10%

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Industrial temperature range: –40°C to +85°C

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FEATURES

ULTRA-PRECISION1:8FANOUT

bUFFER WITH400mV LVPECL OUTPUTS

AND INTERNAL TERMINATION

SY58033U

APPLICATIONS

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AllSONETandallGigEclockdistribution

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AllFibreChannelclockanddatadistribution

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Networkroutingenginetimingdistribution

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High-end,low-skewmultiprocessorsynchronous

clockdistribution

Rev.: E

Amendment: /0

Issue Date: July 2010

The SY58033U is a 2.5V/3.3V precision, high-speed, fully

differential 400mV LVPECL 1:8 fanout buffer. The SY58033U

is optimized to provide eight identical output copies with

process clock signals as fast as 5.5GHz.

The differential input includes Micrel’s unique, 3-pin

input termination architecture that allows the SY58033U to

directly interface to LVPECL, CML, and LVDS differential

signal (AC- or DC-coupled) without any level-shifting or

termination resistor networks in the signal path. The result

is a clean, stub-free, low-jitter solution. The LVPECL (100k

temperature compensated) outputs feature a 400mV typical

swing into 50ý loads, and provide an extremely fast rise/fall

time guaranteed to be less than 80ps.

The SY58033U operates from a 2.5V ±5% supply or

3.3V ±10% supply and is guaranteed over the full industrial

temperature range (–40°C to +85°C). Other high-speed 1:8

fanout buffers include the CML SY58031U and the 800mV

LVPECL SY58032U. The SY58033U is part of Micrel’s high-

All support documentation can be found on Micrel’s web

site at www.micrel.com.

FUNCTIONAL bLOCk DIAGRAM

Precision Edge is a registered trademark of Micrel, Inc.

MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.

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IN

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50Ω

50Ω

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Q6

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