Microchip SY58033U Manual


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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.
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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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