Microchip SY58032U Handleiding

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1

M9999-072810

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

DESCRIPTION

■Precision 1:8, LVPECL fanout buffer

■Guaranteed AC performance over temperature and

voltage:

• Clockfrequencyrange:DCto4GHz

• <110pstr / tf times

• <330pstpd

• <20psskew

■Low-jitterperformance:

• 76fsRMSphasejitter(typ)

■100kLVPECLcompatibleoutputs

■Fullydifferentialinputs/outputs

■Acceptsaninputsignalaslowas100mV

■UniqueinputterminationandVT pin accepts

DC-coupledandAC-coupleddifferentialinputs:

(LVPECL,LVDS,andCML)

■Powersupply2.5V±5%or3.3V±10%

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

■Availablein32-pin(5mmx5mm)MLF®package

FEATURES

ULTRA-PRECISION1:8FANOUT

BUFFER LVPECL OUTPUTS WITH

AND INTERNAL TERMINATION

Precision Edge®

SY58032U

APPLICATIONS

■AllSONETandallGigEclockdistribution

■AllFibreChannelclockanddatadistribution

■Networkroutingenginetimingdistribution

■High-end,low-skewmultiprocessorsynchronous

clockdistribution

Rev.: E Amendment: /0

Issue Date: July 2010

The SY58032U is a 2.5V/3.3V precision, high-speed,

fully differential LVPECL 1:8 fanout buffer. The SY58032U

is optimized to provide eight identical output copies with

less than 20ps of skew and only 76fsRMS phase jitter. It can

process clock signals as fast as 4GHz.

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

termination architecture that allows the SY58032U to directly

interface to LVPECL, CML, and LVDS differential signals

(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 interface solution. The LVPECL (100k

temperature compensated) outputs feature 800mV typical

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

time guaranteed to be less than 110ps.

The SY58032U 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). For applications that

require a higher high-speed 1:8 fanout buffer, consider the

SY58031U or SY58033U. The SY58032U is part of Micrel’s

high-speed, Precision Edge® product line.

All support documentation can be found on Micrel’s web

site at www.micrel.com.

FUNCTIONAL BLOCK DIAGRAM

Precision Edge®

Q1

/Q1

Q0

/Q0

IN

/IN

V

T

50Ω

50Ω

V

REF-AC

Q3

/Q3

Q2

/Q2

Q5

/Q5

Q4

/Q4

Q7

/Q7

Q6

/Q6

Precision Edge is a registered trademark of Micrel, Inc.

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

Product specificaties