Microchip SY58033U Manual

Microchip Ikke kategoriseret SY58033U

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M9999-072810

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

DESCRIPTION

■Precision 1:8, 400mV LVPECL fanout buffer

■Low-jitter performance:

• 76fsRMS phase jitter (typ)

■Guaranteed AC performance over temperature and

voltage:

• Clockfrequencyrange: DCto5.5GHz

• <80pstr / tf times

• <280pstpd

• <20psskew

■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)QFNPackage

FEATURES

ULTRA-PRECISION 1:8 FANOUT

BUFFER 400mV LVPECL OUTPUTS WITH

AND INTERNAL TERMINATION

Precision Edge®

SY58033U

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.: F Amendment: /0

Issue Date: October 2011

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

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

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

50 ohms 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-

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®

Precision Edge is a registered trademark of Micrel, Inc.

Precision Edge®

SY58033U

Micrel, Inc.

M9999-072810

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

PACkAGE/ORDERING INFORMATION

Pin Number Pin Name Pin Function

 3,6 IN,/IN DifferentialSignalInput: Eachpinofthispairinternallyterminateswith50Ωtothe

VT pin. Note that this input will default to an indeterminate state if left open.

See “Input Interface Applications” section.

4 VT Input Termination Center-Tap: Each input terminates to this pin. The V

T pin provides a

center-tap for each input (IN, /IN) to the termination network for maximum interface

   exibility.See“InputInterfaceApplications”section.

2, 7, 17, 24 GND, Ground. Exposed pad must be connected to a ground plane that is the same potential

Exposed Pad as the ground pin.

1, 8, 9, 16, VCC Positive Power Supply: Bypass with 0.1µF||0.01µF low ESR capacitors as close to the

18, 23, 25, 32 pins as possible.

31, 30, 29, 28, 27, Q0, /Q0, Q1, /Q1, 400mV LVPECL Differential Output Pairs: Differential buffered output copy of the

 26,22,21,20,19, Q2,/Q2,Q3,/Q3 inputsignal.TheLVPECLoutputswingistypically400mVinto50Ω.Unused 

 15,14,13,12, Q4,/Q4,Q5,/Q5, outputpairsmaybeleftoatingwithnoimpactonjitter.See“LVPECLOutput”section.

11, 10 Q6, /Q6, Q7, /Q7

5 VREF-AC Bias Reference Voltage: Equal to V

CC–1.2V (approx.), and used for AC-coupled

applications. See “Input Interface Applications” section. When using V

REF-AC, bypass

with 0.01µF capacitor to VCC. Maximum sink/source current is 0.5mA.

PIN DESCRIPTION

32-PinQFN(QFN-32)

Ordering Information(1)

 Package Operating Package

PartNumber Type Range Marking

SY58033UMG(3) QFN-32 Industrial SY58033U with

Pb-Free Pb-Free bar-line indicator

SY58033UMGTR(2, 3) QFN-32 Industrial SY58033U with

Pb-Free Pb-Free bar-line indicator

Notes:

1. Contact factory for die availability. Dice are guaranteed at T

A = 25°C, DC electricals only.

All devices are Pb-Free.

2. Tape and Reel.

3. Pb-Free package recommended for new designs.

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	SY58033U

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