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Micrel, Inc.
Precision Edge ULTRA-PRECISION1:8FANOUT SY58033U (R) bUFFER WITH400mV LVPECL OUTPUTS Precision Edge SY58033U AND INTERNAL TERMINATION
(R)
FEATURES
Precision 1:8, 400mV LVPECL fanout buffer Guaranteed AC performance over temperature and voltage: * Clockfrequencyrange: DCto5.5GHz * <80pstr / tf times * <280pstpd * <20psskew Low-jitterperformance: * 76fsRMSphasejitter(typ) 100kLVPECLcompatibleoutputs Fullydifferentialinputs/outputs Acceptsaninputsignalaslowas100mV UniqueinputterminationandVT pin accepts DC-coupledandAC-coupleddifferentialinputs: (LVPECL,LVDS,andCML) Powersupply2.5V5%or3.3V10% Industrial temperature range: -40C to +85C Availablein32-pin(5mmx5mm)MLF(R)Package Precision Edge(R)
DESCRIPTION
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 50y 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 (-40C to +85C). Other high-speed 1:8 fanout buffers include the CML SY58031U and the 800mV LVPECL SY58032U. The SY58033U is part of Micrel's highspeed, Precision Edge(R) product line. All support documentation can be found on Micrel's web site at www.micrel.com.
APPLICATIONS
AllSONETandallGigEclockdistribution AllFibreChannelclockanddatadistribution Networkroutingenginetimingdistribution High-end,low-skewmultiprocessorsynchronous clockdistribution
FUNCTIONAL bLOCk DIAGRAM
Q0 /Q0 Q1 /Q1 Q2 /Q2
IN 50 VT 50 /IN
Q3 /Q3 Q4 /Q4 Q5 /Q5 Q6 /Q6 Q7
V REF-AC
Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc. M9999-072810 hbwhelp@micrel.com or (408) 955-1690
/Q7
Rev.: E Amendment: /0
1
Issue Date: July 2010
Micrel, Inc.
Precision Edge(R) SY58033U
PACkAGE/ORDERING INFORMATION
VCC Q0 /Q0 Q1 /Q1 Q2 /Q2 VCC
Ordering Information(1)
GND VCC Q3 /Q3 Q4 /Q4 VCC GND
VCC GND IN VT VREF-AC /IN GND VCC
32 31 30 29 28 27 26 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 24 23 22 21 20 19 18 17
PartNumber SY58033UMI SY58033UMITR(2) SY58033UMG(3) SY58033UMGTR(2, 3)
Package Type MLF-32 MLF-32 MLF-32 MLF-32
Operating Range Industrial Industrial Industrial Industrial
Package Marking SY58033U SY58033U SY58033U with Pb-Free bar-line indicator SY58033U with Pb-Free bar-line indicator
Lead Finish Sn-Pb Sn-Pb Pb-Free NiPdAu Pb-Free NiPdAu
VCC /Q7 Q7 /Q6 Q6 /Q5 Q5 VCC
32-PinMLF(R)(MLF-32)
Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25C, DC electricals only. 2. Tape and Reel. 3. Pb-Free package recommended for new designs.
PIN DESCRIPTION
Pin Number 3, 6 Pin Name IN, /IN Pin Function Differential Signal Input: Each pin of this pair internally terminates with 50y to the VT pin. Note that this input will default to an indeterminate state if left open. See "Input Interface Applications" section. Input Termination Center-Tap: Each input terminates to this pin. The VT pin provides a center-tap for each input (IN, /IN) to the termination network for maximum interface flexibility.See"InputInterfaceApplications"section. Ground. Exposed pad must be connected to a ground plane that is the same potential as the ground pin. Positive Power Supply: Bypass with 0.1F||0.01F low ESR capacitors as close to the pins as possible. 400mV LVPECL Differential Output Pairs: Differential buffered output copy of the inputsignal.TheLVPECLoutputswingistypically400mVinto50.Unused outputpairsmaybeleftfloatingwithnoimpactonjitter.See"LVPECLOutput"section. Bias Reference Voltage: Equal to VCC-1.2V (approx.), and used for AC-coupled applications. See "Input Interface Applications" section. When using VREF-AC, bypass with 0.01F capacitor to VCC. Maximum sink/source current is 0.5mA.
4 2, 7, 17, 24 1, 8, 9, 16, 18, 23, 25, 32 31, 30, 29, 28, 27, 26,22,21,20,19, 15,14,13,12, 11, 10 5
VT GND, Exposed Pad VCC Q0, /Q0, Q1, /Q1, Q2,/Q2,Q3,/Q3 Q4,/Q4,Q5,/Q5, Q6, /Q6, Q7, /Q7 VREF-AC
M9999-072810 hbwhelp@micrel.com or (408) 955-1690
2
Micrel, Inc.
Precision Edge(R) SY58033U
AbsoluteMaximumRatings(1)
Power Supply Voltage (VCC ) .......................-0.5V to +4.0V Input Voltage (VIN) ...........................................-0.5V to VCC Current (VT) Source or sink current on VT pin......................... 100mA Input Current (VT) Source or sink current on IN, /IN .......................... 50mA Current (VREF) Source or sink current on VREF-AC(3) ................... 1.5mA Lead Temperature Soldering (20 sec.) ...................... 260C Storage Temperature Range (TS ) ............ -65C to +150C
Operating Ratings(2)
Power Supply Voltage (VCC) ................. +2.375V to +3.60V Ambient Temperature Range (TA) .............. -40C to +85C Package Thermal Resistance(4) MLF(R)(JA) Still-Air ............................................................. 35C/W MLF(R)(JB) Junction-to-Board ............................................ 20C/W
DCELECTRICALCHARACTERISTICS(5)
TA= -40C to +85C. Symbol Parameter VCC ICC VIL VIH Power Supply Voltage Power Supply Current Input HIGH Voltage Input LOW Voltage Input Voltage Swing Differential Input Voltage Swing |IN0, /IN0|, |IN1, /IN1| In-to-VTResistance Max. In-to-VT (IN, /IN) Condition 2.5V nominal 3.3V nominal VCC = max. No. load includes current through50pull-ups. IN, /IN, Note 6 IN, /IN IN, /IN, see Figure 1a. IN, /IN, see Figure 1b. Min 2.375 3.0 VCC-1.6 0 0.1 0.2 40 50 60 1.28 VCC-1.3 VCC-1.2 VCC-1.1 Typ 2.5 3.3 180 Max 2.625 3.6 250 VIH-0.1 1.7 VCC Units V V mA V V V V V V
VIN
VDIFF_IN
RIN
VT IN
VREF-AC
LVPECLDCELECTRICALCHARACTERISTICS(5)
VCC = 2.5V 5% or 3.3V 10%; RL = 50y to VCC-2V; TA= -40C to +85C unless otherwise stated Symbol Parameter Condition VOH VOL VOUT Output HIGH Voltage Output LOW Voltage Output Voltage Swing Differential Voltage Swing see Figure 1a. see Figure 1b. Min Typ Max VCC-0.895 400 800 VCC-1.295 Units V V mV mV
VCC-1.545 150 300
VCC-1.145
VDIFF_OUT
Notes: 1. Permanent device damage may occur if "Absolute Maximum Ratings" are exceeded. This is a stress rating only and functional operation is not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to "Absolute Maximum Ratings" conditions for extended periods may affect device reliability. 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. 3. Due to the limited drive capability, use for input of the same package only. 4. Thermalperformanceassumesexposedpadissoldered(orequivalent)tothedevice'smostnegativepotential(GND)onthePCB.JB uses 4-layer JA in still-air number unless otherwise stated.
5. ThecircuitisdesignedtomeettheDCspecificationsshownintheabovetableafterthermalequilibriumhasbeenestablished. 6. VIH (min) not lowers than 1.2V.
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Micrel, Inc.
Precision Edge(R) SY58033U
ACELECTRICALCHARACTERISTICS(7)
Symbol tpd fMAX tpd tempco tSKEW tJITTER tr, tf
Notes: 7. 8. Output-to-output skew is measured between outputs under identical conditions. High frequency AC electricals are guaranteed by design and characterization. All outputs loaded with 50y to VCC-2V, VIN100mV.
VCC = 2.5V 5% or 3.3V 10%; RL = 50y to VCC-2V; TA = -40C to +85C, unless otherwise stated. Parameter Condition Maximum Operating Frequency Propagation Delay (IN-to-Q) Differential Propagation Delay TemperatureCoefficient Output-to-Output Skew(within device) Part-to-Part Skew RMS Phase Jitter Output Rise/Fall Time Note 8 Note 9 Output = 622MHz Integration Range 12kHz - 20MHz 20% to 80%, at full output swing. VOUT200mV
Min 5.5 130
Typ 200 35 7
Max 280
Units GHz ps fs/C
Clock
20 100
ps ps fs
76 20 50 80
ps
9. Part-to-partskewisdefinedfortwopartswithidenticalpowersupplyvoltagesatthesametemperatureandwithnoskewoftheedgesattherespective inputs. Part-to-part skew includes variation in tpd.
PHASENOISE
RMS Phase Jitter (Random) 12kHz to 20MHz = 76fs (Typical)
PhaseNoisePlot:622MHz@3.3V
M9999-072810 hbwhelp@micrel.com or (408) 955-1690
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Micrel, Inc.
Precision Edge(R) SY58033U
SINGLE-ENDEDANDDIFFERENTIALSWINGS
VIN, VOUT 400mV (Typ.)
VDIFF_IN, VDIFF_OUT 800mV (Typ.)
Figure1a. Single-EndedVoltageSwing
Figure1b. DifferentialVoltageSwing
TIMING DIAGRAM
/IN IN tPD /Q Q VOUT tPD VIN
M9999-072810 hbwhelp@micrel.com or (408) 955-1690
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Micrel, Inc.
Precision Edge(R) SY58033U
TYPICALOPERATINGCHARACTERISTICS
VCC = 2.5V, GND = 0, VIN = 100mV, TA = 25C, unless otherwise stated.
M9999-072810 hbwhelp@micrel.com or (408) 955-1690
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Micrel, Inc.
Precision Edge(R) SY58033U
INPUT bUFFER
VCC
IN 50 VT 50 /IN GND
Figure2. SimplifiedDifferentialInputBuffer
INPUT INTERFACE APPLICATIONS
VCC VCC IN
VCC
VCC
VCC
VCC
LVPECL
IN CML /IN
GND /IN SY58033U
IN CML /IN SY58033U GND NC NC VREF-AC VT
VCC GND
SY58033U VREF-AC VT
VCC 0.01F Rpd For 2.5V, Rpd = 19 For 3.3V, Rpd = 50
VREF-AC VT
Figure3a.DC-CoupledCML Input Interface
Option: May connect VT to VCC .
Figure3b.AC-CoupledCML Input Interface
Figure 3c. LVPECL Input Interface
VCC
VCC
VCC VCC
IN
LVPECL
/IN Rpd GND GND For 3.3V, Rpd = 100 For 2.5V, Rpd = 50 Rpd SY58033U VREF-AC VT
LVDS
IN /IN SY58033U GND NC NC VREF-AC VT
VCC
Figure3d.AC-CoupledLVPECL Input Interface
M9999-072810 hbwhelp@micrel.com or (408) 955-1690
Figure 3e. LVDS Input Interface
7
Micrel, Inc.
Precision Edge(R) SY58033U
LVPECL OUTPUT
LVPECL has high input impedance, and very low output impedance (open emitter), and small signal swing which results in low electromagnetic interference (EMI). LVPECL is ideal for driving 50 and 100 controlled impedance transmission lines. There are several techniques in terminating the LVPECL output, which are the Parallel Termination-Thevenin Equivalent, the Parallel Termination (3-Resistor), and the AC-Coupled Termination. Unused output pairs may be left floating. However, single-ended outputs must be terminated, or balanced.
+3.3V
+3.3V
ZO = 50 ZO = 50
R1 130
R1 130
+3.3V
For +2.5V systems, R1 = 250, R2 = 62.5
R2 82
R2 82
VT = VCC --2V
Figure4.ParallelTermination-TheveninEquivalent
+3.3V
Z = 50 Z = 50
+3.3V
source
50
50 Rb
destination VCC C1 (optional) 0.01F
Notes: 1. Power saving alternative to Thevenin termination. 2. Place termination resistors as close to destination inputs as possible. 3. Rb resistor sets the DC bias voltage, equal to V T. 4. For 2.5V systems, R b = 19, For 3.3V systems, R b = 50
Figure5.ParallelTermination(3-Resistor)
RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION
PartNumber SY58031U SY58032U SY58033U Function Ultra-Precision 1:8 Fanout Buffer with 400mV CML Outputs and Internal I/O Termination Ultra-Precision 1:8 Fanout Buffer with LVPECL Outputs and Internal Termination Ultra-Precision 1:8 Fanout Buffer with 400mV LVPECL Outputs and Internal Termination 32-MLF(R) Manufacturing Guidelines Exposed Pad Application Note HBW Solutions DataSheetLink http://www.micrel.com/product-info/products/sy58031u.shtml http://www.micrel.com/product-info/products/sy58032u.shtml http://www.micrel.com/product-info/products/sy58033u.shtml www.amkor.com/products/notes_papers/MLF_AppNote_0902.pdf http://www.micrel.com/product-info/as/solutions.shtml
M9999-072810 hbwhelp@micrel.com or (408) 955-1690
8
Micrel, Inc.
Precision Edge(R) SY58033U
32-PINMicroLeadFrame(R)(MLF-32)
Package EP- Exposed Pad
Die
CompSide Island
Heat Dissipation
Heat Dissipation Heavy Copper Plane VEE
Heavy Copper Plane
VEE
(Alwayssolder,orequivalent,theexposedpadtothePCB)
PCBThermalConsiderationfor32-PinMLF(R)Package
PackageNotes: 1. PackagemeetsLevel2qualification. 2. All parts are dry-packaged before shipment. 3. Exposed pads must be soldered to a ground for proper thermal management.
MICREL,INC. 2180FORTUNEDRIVE SANJOSE,CA 95131 USA
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrelreservestherighttochangecircuitryandspecificationsatanytimewithoutnotificationtothecustomer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into thebodyor(b)supportorsustainlife,andwhosefailuretoperformcanbereasonablyexpectedtoresultinasignificantinjurytotheuser.APurchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2005 Micrel, Incorporated. M9999-072810 hbwhelp@micrel.com or (408) 955-1690
tel
+ 1 (408) 944-0800
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+ 1 (408) 474-1000
web
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