1
Precision Edge®
SY58036U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
■ Provides six ultra-low skew copies of the selected
input
■ 2:1 MUX input included for clock switchover
applications
■ Guaranteed AC performance over temperature and
voltage:
• Clockfrequencyrange: DCto>6GHz
• <300psIN-to-OUTtpd
• <80pstr
/ tf times
• <20psskew(output-to-output)
■ Ultra-low jitter design:
• 50fsRMSphasejitter(typ)
■ Lowsupplyvoltageoperation: 2.5Vand3.3V
■ UniqueinputterminationandVT pin accepts DC-
coupledandAC-coupledinputs(CML,PECL,LVDS)
■ Uniqueinputisolationdesignminimizescrosstalk
■ 400mVLVPECL(100Kcompatible)outputswing
■ –40°C to +85°C temperature range
■ Availablein32-pin(5mmx5mm)MLF® package
FEATURES
6GHz,1:6400mVLVPECLFANOUT
BUFFERWITH2:1 MUX INPUT
AND INTERNAL TERMINATION
Precision Edge®
SY58036U
APPLICATIONS
■ Redundantclockdistribution
■ AllSONET/SDHclockdistribution
■ AllFibreChanneldistribution
■ AllGigabitEthernetclockdistribution
The SY58036U is a 2.5V/3.3V precision, high-speed,
1:6 fanout buffer capable of handling clocks up to 6GHz.
A differential 2:1 MUX input is included for redundant clock
switchover applications.
The differential input includes Micrel’s unique, 3-pin input
termination architecture that allows the device to interface
to any differential signal (AC- or DC-coupled) as small as
100mV without any level shifting or termination resistor
networks in the signal path. The outputs are 400mV LVPECL
(100K temperature compensated), with extremely fast rise/
fall times guaranteed to be less than 80ps.
The SY58036U operates from a 2.5V ±5% supply or a
3.3V ±10% supply and is guaranteed over the full industrial
temperature range of –40°C to +85°C. For applications that
require CML outputs, consider the SY58034U or for 800mV
LVPECL outputs the SY58035U. The SY58036U 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 is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
Precision Edge®
Q0
/Q0
Q1
/Q1
Q2
/Q2
Q3
/Q3
Q4
/Q4
Q5
/Q5
IN0
/IN0
VT0
50Ω
50Ω
IN1
/IN1
VT1
50Ω
50Ω
0
1
Mux
SEL
(TTL/CMOS)
S
VREF-AC0
VREF-AC1
2:1 Mux
1:6 Fanout
Rev.: F Amendment: /0
Issue Date: July 2010
2
Precision Edge®
SY58036U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
PACKAGE/ORDERINGINFORMATION
PinNumber PinName PinFunction
1, 4 IN0, /IN0 Differential Input: These input pairs are the differential signal inputs to the device. These
5, 8 IN1, /IN1 inputs accept AC- or DC-coupled signals as small as 100mV. Each pin of a pair internally
terminates to a VT pin through 50ý. Note that these inputs will default to an indeterminate
state if left open. Please refer to the “Input Interface Applications” section for more details.
2, 6 VT0, VT1 Input Termination Center-Tap: Each side of the differential input pair terminates to a VT
pin. The VT0 and VT1 pins provide a center-tap to a termination network for maximum
interfaceexibility.See“InputInterfaceApplications”sectionformoredetails.
31 SEL This single-ended TTL/CMOS compatible input selects the inputs to the multiplexer. Note
thatthisinputisinternallyconnectedtoa25kΩpull-upresistorandwilldefaulttoalogic
HIGH state if left open. The MUX select switchover function is asynchronous.
10 NC No connect.
11, 16, 18, VCC Positive Power Supply: Bypass with 0.1µF || 0.01µF low ESR capacitors and place as
23, 25, 30 close to the VCC pins as possible.
29, 28 Q0, /Q0, Differential Outputs: These 100K (temperature compensated) LVPECL output pairs are
27, 26 Q1, /Q1, low skew copies of the selected input. Please refer to the “Truth Table” for details.
22, 21 Q2, /Q2,
20, 19 Q3, /Q3,
15, 14 Q4, /Q4,
13, 12 Q5, /Q5
9, 17, 24, 32 GND, Ground. Ground pin and exposed pad must be connected to the same ground plane.
Exposed Pad
3, 7 VREF-AC0 Reference Voltage: These output biases to VCC–1.2V. It is used for AC-coupling inputs
VREF-AC1 (IN, /IN). Connect VREF-AC directly to the VT pin. Bypass with 0.01µF low ESR capacitor to
V
CC. See “Input Interface Applications” section. Maximum sink/source current is ±1.5mA.
Due to the limited drive capability, the VREF-AC pin is only intended to drive its respective
VT pin.
PIN DESCRIPTION
24
23
22
21
20
19
18
17
GND
VCC
Q2
/Q2
Q3
/Q3
VCC
GND
IN0
VT0
VREF-AC0
/IN0
IN1
VT1
VREF-AC1
/IN1
1
2
3
4
5
6
7
8
910 11 12 13 14 15 16
32 31 30 29 28 27 26 25
/Q0
Q0
VCC
SEL
GND
Q1
/Q1
VCC
Q5
/Q5
VCC
NC
GND
/Q4
Q4
VCC
32-PinMLF®(MLF-32)
TRUTHTABLE
SEL
0 IN0 Input Selected
1 IN1 Input Selected
Ordering Information(1)
Package Operating Package Lead
PartNumber Type Range Marking Finish
SY58036UMI MLF-32 Industrial SY58036U Sn-Pb
SY58036UMITR(2) MLF-32 Industrial SY58036U Sn-Pb
SY58036UMG(3) MLF-32 Industrial SY58036U with NiPdAu
Pb-Free bar-line indicator Pb-Free
SY58036UMGTR(2, 3) MLF-32 Industrial SY58036U with NiPdAu
Pb-Free bar-line indicator Pb-Free
Notes:
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only.
2. Tape and Reel.
3. Pb-Free package recommended for new designs.
3
Precision Edge®
SY58036U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
AbsoluteMaximumRatings(1)
Power Supply Voltage (VCC ) .......................–0.5V to +4.0V
Input Voltage (VIN) ...........................................–0.5V to VCC
LVPECL Output Current (IOUT)
Continuous ............................................................. 50mA
Surge .................................................................... 100mA
Termination Current
Source or sink current on VT pin......................... ±100mA
Input Current
Source or sink current on IN, /IN pin .................... ±50mA
Source or sink current on VREF-AC pin ................. ±2mA
Lead Temperature (soldering, 10 sec.) ...................... 220°C
Storage Temperature Range (TS ) ............ –65°C to +150°C
Operating Ratings(2)
Power Supply Voltage (VCC) ............... +2.375V to +2.625V
............................................................. +3.0V to +3.6V
Ambient Temperature Range (TA) .............. –40°C to +85°C
Package Thermal Resistance(3)
MLF®(θJA)
Still-Air ............................................................. 35°C/W
MLF®(ψJB)
Junction-to-Board ............................................ 16°C/W
Symbol Parameter Condition Min Typ Max Units
VCC Power Supply Voltage 2.375 2.5 2.625 V
3.0 3.3 3.6 V
ICC Power Supply Current No load, max. VCC 180 250 mA
RDIFF_IN DifferentialInputResistance 90 100 110 Ω
(IN-to-/IN)
RIN Input Resistance (IN-to-VT) 45 50 55 Ω
VIH Input HIGH Voltage (IN, /IN) Note 5 VCC–1.6 VCC V
VIL Input LOW Voltage (IN, /IN) 0 VIH–0.1 V
VIN Input Voltage Swing (IN, /IN) See Figure 1a. 0.1 1.7 V
VDIFF_IN Differential Input Voltage Swing See Figure 1b. 0.2 V
|IN, /IN|
VT IN IN to VT (IN, /IN) 1.28 V
VREF-AC Reference Voltage VCC–1.3 VCC–1.2 VCC–1.1 V
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. Thermalperformanceassumesexposedpadissoldered(orequivalent)tothedevice’smostnegativepotentialonthePCB.ΨJBandθJA are shown
for a 4-layer PCB in a still air environment, unless otherwise stated.
4. ThecircuitisdesignedtomeettheDCspecicationsshownintheabovetableafterthermalequilibriumhasbeenestablished.
5. VIH (min) not lower than 1.2V.
DCELECTRICALCHARACTERISTICS(4)
TA= –40°C to +85°C, unless otherwise stated.
4
Precision Edge®
SY58036U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
VCC = 2.5V ±5% or 3.3V ±10%, RL=50ΩtoVCC–2V; TA= –40°C to +85°C, unless otherwise stated.
Symbol Parameter Condition Min Typ Max Units
VOH Output HIGH Voltage VCC–1.145 VCC–0.895 V
VOL Output LOW Voltage VCC–1.545 VCC–1.295 V
VOUT Output Differential Swing See Figure 1a. 150 400 mV
VDIFF_OUT Differential Output Voltage Swing See Figure 1b. 300 800 mV
LVPECLOUTPUTDCELECTRICALCHARACTERISTICS(6)
VCC = 2.5V ±5% or 3.3V ±10%; TA= –40°C to +85°C, unless otherwise stated.
Symbol Parameter Condition Min Typ Max Units
VIH Input HIGH Voltage 2.0 V
VIL Input LOW Voltage 0.8 V
IIH Input HIGH Current –125 40 µA
IIL Input LOW Current –300 µA
Note:
6. ThecircuitisdesignedtomeettheDCspecicationsshownintheabovetableafterthermalequilibriumhasbeenestablished.
LVTTL/CMOSDCELECTRICALCHARACTERISTICS(6)
5
Precision Edge®
SY58036U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
VCC = 2.5V ±5% or 3.3V ±10%, RL=50ΩtoVCC–2V; TA= –40°C to +85°C, unless otherwise stated.
Symbol Parameter Condition Min Typ Max Units
fMAX Maximum Operating Frequency VOUT≥200mV 6 7 GHz
tpd Differential Propagation Delay
(IN0 or IN1-to-Q) 150 220 300 ps
(SEL-to-Q) 100 220 400 ps
∆tpd Tempco Differential Propagation Delay 65 fs/°C
TemperatureCoefcient
tSKEW Output-to-Output Note 8 20 ps
Part-to-Part Note 9 100 ps
tJITTER RMS Phase Jitter Output: 622MHz
Integrated Range: 12kHz - 20MHz 50 fs
Adjacent Channel Note 10
Crosstalk-Induced Jitter 0.7 psRMS
tr, tf Output Rise/Fall Time Full Swing, 20% to 80% 20 40 80 ps
Notes:
7. High frequency AC electricals are guaranteed by design and characterization.
8. Output-to-output skew is measured between outputs under identical transitions.
9. Part-to-partskewisdenedfortwopartswithidenticalpowersupplyvoltagesatthesametemperatureandwithnoskewoftheedgesattherespec-
tive inputs.
10. Crosstalk is measured at the output while applying two similar clock frequencies that are asynchronous with respect to each other at the inputs.
ACELECTRICALCHARACTERISTICS(7)
PHASENOISE
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
-200
10 100 1K 10K 100K 1M 10M 100M
OFFSETFREQUENCY(Hz)
NOISEPOWER(dBc/Hz)
PhaseNoisePlot:622MHz@3.3V
RMS Phase Jitter (Random)
12kHz to 20MHz: 50fs (Typical)
6
Precision Edge®
SY58036U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
TIMING DIAGRAMS
IN
/IN
Q
Input-to-Q t
pd
SEL-to-Q t
pd
/Q
t
pd
SEL
Q
/Q
t
pd
t
pd
V
CC
/2 V
CC
/2
SINGLE-ENDEDANDDIFFERENTIALSWINGS
V
IN
,
V
OUT
400mV (Typ.)
Figure1a. Single-EndedVoltageSwing
V
DIFF_IN
,
V
DIFF_OUT
800mV (Typ.)
Figure1b. DifferentialVoltageSwing
7
Precision Edge®
SY58036U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
TYPICALOPERATINGCHARACTERISTICS
VCC = 2.5V, GND = 0, VIN = 100mV, RL=50ΩtoVCC–2V; TA = 25°C, unless otherwise stated.
0
50
100
150
200
250
300
350
400
450
0200040006000800010000
OUTPUT SWING (mV)
FREQUENCY (MHz)
Output Swing
vs.Frequency
218
220
222
224
226
-40-20 0 20 40 60 80 100
PROPAGATION DELAY (ps)
TEMPERATURE (°C)
PropagationDelay
vs. Temperature
8
Precision Edge®
SY58036U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
FUNCTIONALCHARACTERISTICS
VCC = 3.3V, GND = 0, VIN = 100mV, RL=50ΩtoVCC–2V; TA = 25°C, unless otherwise stated.
200MHzOutput
TIME (600ps/div.)
Output Swing
(100mV/div.)
2.5GHzOutput
TIME (50ps/div.)
Output Swing
(100mV/div.)
7GHzOutput
TIME (20ps/div.)
Output Swing
(100mV/div.)
9
Precision Edge®
SY58036U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
INPUT AND OUTPUT STAGES
50Ω
50Ω
VCC
GND
/IN
VT
IN
Figure2a.SimpliedDifferentialInputStage
V
CC
/Q
Q
Figure2b.SimpliedLVPECLOutputStage
INPUTINTERFACEAPPLICATIONS
LVPECL
IN
/IN
SY58036U
V
CC
R
pd
R
pd
For 3.3V, R
pd
=100Ω.
For 2.5V, R
pd
=50Ω.
GND
GND VT
VREF-AC
0.01µF
V
CC
Figure3b.LVPECL
Interface(AC-Coupled)
LVDS
IN
/IN
NC
NC
SY58036U
V
CC
GND
VT
VREF-AC
Figure3e.LVDSInterface
CML
IN
/IN
NC
SY58036U
V
CC
GND
Option: May connect V
T
to V
CC.
VT
VREF-ACNC
Figure3c.CML
Interface(DC-Coupled)
0.01µF
VCC
CML
IN
/IN
SY58036U
VCC
GND
VT
VREF-AC
Figure3d.CML
Interface(AC-Coupled)
LVPECL
IN
/IN
SY58036U
VCC
0.01µF
VCC
Rpd
For 3.3V, Rpd =50Ω.
For 2.5V, Rpd =19Ω.
GND
VT
VREF-ACNC
Figure3a.LVPECL
Interface(DC-Coupled)
10
Precision Edge®
SY58036U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
OUTPUTINTERFACEAPPLICATIONS
R2
82Ω
R2
82Ω
ZO=50Ω
ZO=50Ω
+3.3V +3.3V
R1
130Ω
R1
130Ω
+3.3V
Note: For 2.5V systems:
R1=250Ω,R2=62.5Ω
Figure4a.ParallelThevenin-Equivalent
Termination
Z=50Ω
Z=50Ω
50Ω 50Ω
V
CC
50Ω
+3.3V +3.3V
“source” “destination”
RbC1
0.01µF
(optional)
Note: For 2.5V systems:
Rb=19Ω
Figure4b.ParallelTermination
(3-Resistor)
PartNumber Function DataSheetLink
SY58034U 6GHz, 1:6 CML Fanout Buffer with 2:1 MUX Input http://www.micrel.com/product-info/products/sy58034u.shtml
and Internal I/O Termination
SY58035U 4.5GHz, 1:6 LVPECL Fanout Buffer with 2:1 MUX http://www.micrel.com/product-info/products/sy58035u.shtml
Input and Internal Termination
MLF® Application Note www.amkor.com/products/notes_papers/MLF_AppNote_0902.pdf
HBW Solutions New Products and Applications www.micrel.com/product-info/products/solutions.shtml
RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION
LVPECL has high input impedance, very low output (open
emitter) impedance, and small signal swing, which results in
lowEMI.LVPECLisidealdriving50Ωand100Ωcontrolled
impedance transmission lines. There are several techniques
for terminating the LVECL output: parallel-thevenin equivalent
termination and parallel termination (3-resistor). Unused
output pairs may be left oating. However, single-ended
outputs must be terminated, or balanced.
11
Precision Edge®
SY58036U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
32-PIN MicroLeadFrame®(MLF-32)
MICREL,INC. 2180FORTUNEDRIVE SANJOSE,CA 95131 USA
t e l + 1 (408) 944-0800 f a x + 1 (408) 474-1000 w e b http://www.micrel.com
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.
Micrelreservestherighttochangecircuitryandspecicationsatanytimewithoutnoticationtothecustomer.
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
thebodyor(b)supportorsustainlife,andwhosefailuretoperformcanbereasonablyexpectedtoresultinasignicantinjurytotheuser.APurchaser’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.
© 2005 Micrel, Incorporated.
Package Notes:
1. PackagemeetsLevel2qualication.
2. All parts are dry-packaged before shipment.
3. Exposed pads must be soldered to a ground for proper thermal management.
Package
EP- Exposed Pad
Die
CompSide Island
Heat Dissipation
Heavy Copper Plane
Heavy Copper Plane
V
EE
V
EE
Heat Dissipation
PCBThermalConsiderationfor32-PinMLF® Package
(Alwayssolder,orequivalent,theexposedpadtothePCB)