Microchip SY58032U Manual

Microchip Ikke kategoriseret SY58032U

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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.
2
Precision Edge®
SY58032U
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 50ý to the V
T
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, 100k 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800mVinto50Ω.Unusedoutput
15,14,13,12, Q4,/Q4,Q5,/Q5, 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 (typical), 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
24
23
22
21
20
19
18
17
GND
VCC
Q3
/Q3
Q4
/Q4
VCC
GND
VCC
GND
IN
VT
VREF-AC
/IN
GND
VCC
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
32 31 30 29 28 27 26 25
/Q1
Q1
/Q0
Q0
VCC
Q2
/Q2
VCC
Q6
/Q6
Q7
/Q7
VCC
/Q5
Q5
VCC
32-PinMLF®(MLF-32)
Ordering Information(1)
Package Operating Package Lead
PartNumber Type Range Marking Finish
SY58032UMI MLF-32 Industrial SY58032U Sn-Pb
SY58032UMITR(2) MLF-32 Industrial SY58032U Sn-Pb
SY58032UMG(3) MLF-32 Industrial SY58032U with Pb-Free
Pb-Free bar-line indicator NiPdAu
SY58032UMGTR(2, 3) MLF-32 Industrial SY58032U with Pb-Free
Pb-Free bar-line indicator NiPdAu
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A = 25°C, DC electricals only.
2. Tape and Reel.
3. Pb-Free package recommended for new designs.

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: SY58032U

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