SY58032U_10 [MICREL]
ULTRA-PRECISION 1:8 FANOUT BUFFER WITH LVPECL OUTPUTS AND INTERNAL TERMINATION; 超精密1 ： 8扇出与LVPECL输出和内部缓冲终止
| 型号： | SY58032U_10 |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | ULTRA-PRECISION 1:8 FANOUT BUFFER WITH LVPECL OUTPUTS AND INTERNAL TERMINATION |
| 文件： | 总9页 (文件大小：644K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
Precision Edge®
ULTRA-PRECISIONꢀ1:8ꢀFANOUTꢀ
ꢀUFFER WITHꢀLVPECL OUTPUTS
AND INTERNAL TERMINATION
SY58032U
FEATURES
■ Precision 1:8, LVPECL fanout buffer
Precision Edge®
■ Guaranteed AC performance over temperature and
voltage:
DESCRIPTION
•ꢀ Clockꢀfrequencyꢀrange:ꢀDCꢀtoꢀ4GHz
•ꢀ <110psꢀtr/tf times
•ꢀ <330psꢀtpd
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.
•ꢀ <20psꢀskew
■ꢀ Low-jitterꢀperformance:
•ꢀ 76fsRMSꢀphaseꢀjitterꢀ(typ)
■ꢀ 100kꢀLVPECLꢀcompatibleꢀoutputs
■ꢀ Fullyꢀdifferentialꢀinputs/outputs
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.
■ꢀ Acceptsꢀanꢀinputꢀsignalꢀasꢀlowꢀasꢀ100mV
■ꢀ UniqueꢀinputꢀterminationꢀandꢀVT pin accepts
DC-coupledꢀandꢀAC-coupledꢀdifferentialꢀinputs:ꢀ
(LVPECL,ꢀLVDS,ꢀandꢀCML)
■ꢀ Powerꢀsupplyꢀ2.5Vꢀ±5%ꢀorꢀ3.3Vꢀ±10%
■ꢀ Industrialꢀtemperatureꢀrange:ꢀ –40°Cꢀtoꢀ+85°Cꢀ
■ꢀ Availableꢀinꢀ32-pinꢀ(5mmꢀxꢀ5mm)ꢀMLF®ꢀpackage
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 ꢀLOCk DIAGRAM
APPLICATIONS
■ꢀ AllꢀSONETꢀandꢀallꢀGigEꢀclockꢀdistribution
■ꢀ AllꢀFibreꢀChannelꢀclockꢀandꢀdataꢀdistribution
■ꢀ Networkꢀroutingꢀengineꢀtimingꢀdistribution
Q0
/Q0
Q1
■ꢀ High-end,ꢀlow-skewꢀmultiprocessorꢀsynchronousꢀ
/Q1
clockꢀdistribution
Q2
/Q2
IN
50Ω
50Ω
Q3
VT
/Q3
/IN
Q4
/Q4
VREF-AC
Q5
/Q5
Q6
/Q6
Q7
/Q7
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
Rev.: E
Amendment: /0
M9999-072810
hbwhelp@micrel.com or (408) 955-1690
1
Issue Date: July 2010
Precision Edge®
SY58032U
Micrel, Inc.
PACkAGE/ORDERING INFORMATION
Ordering Information(1)
ꢀ
Packageꢀ Operatingꢀꢀ
Packageꢀ
Markingꢀ
Lead
Finish
32 31 30 29 28 27 26 25
PartꢀNumberꢀ
Typeꢀ
MLF-32
MLF-32
MLF-32
Rangeꢀ
Industrial
Industrial
Industrial
1
24
23
GND
VCC
Q3
/Q3
Q4
/Q4
VCC
GND
VCC
GND
IN
SY58032UMI
SY58032U
SY58032U
Sn-Pb
Sn-Pb
2
3
4
5
6
7
SY58032UMITR(2)
SY58032UMG(3)
22
21
20
19
18
VT
VREF-AC
/IN
SY58032U with
Pb-Free bar-line indicator
Pb-Free
NiPdAu
GND
VCC
SY58032UMGTR(2, 3)
MLF-32
Industrial
SY58032U with
Pb-Free bar-line indicator
Pb-Free
NiPdAu
8
17
9
10 11 12 13 14 15 16
Notes:
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only.
2. Tape and Reel.
32-PinꢀMLF®ꢀ(MLF-32)
3. Pb-Free package recommended for new designs.
PIN DESCRIPTION
Pin Number
Pin Name
Pin Function
3, 6
IN, /IN
Differential Signal Input: Each pin of this pair internally terminates with 50ý 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 VT pin provides a
center-tap for each input (IN, /IN) to the termination network for maximum interface
flexibility.ꢀSeeꢀ“InputꢀInterfaceꢀApplications”ꢀsection.
ꢀ
ꢀ
ꢀ
2, 7, 17, 24
GND,
Exposed Pad
Ground. Exposed pad must be connected to a ground plane that is the same potential
as the ground pin.
1, 8, 9, 16,
18, 23, 25, 32
VCC
Positive Power Supply: Bypass with 0.1µF||0.01µF low ESR capacitors as close to the
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,ꢀ inputꢀsignal.ꢀTheꢀLVPECLꢀoutputꢀswingꢀisꢀtypicallyꢀ800mVꢀintoꢀ50Ω.ꢀUnusedꢀoutputꢀꢀ
15,ꢀ14,ꢀ13,ꢀ12,ꢀꢀ
Q4,ꢀ/Q4,ꢀQ5,ꢀ/Q5,ꢀ pairsꢀmayꢀbeꢀleftꢀfloatingꢀwithꢀnoꢀimpactꢀonꢀjitter.ꢀSeeꢀ“LVPECLꢀOutput”ꢀsection.ꢀ
11, 10
Q6, /Q6, Q7, /Q7
5
VREF-AC
Bias Reference Voltage: Equal to VCC–1.2V (typical), and used for AC-coupled
applications. See “Input Interface Applications” section. When using VREF-AC, bypass
with 0.01µF capacitor to VCC. Maximum sink/source current is 0.5mA.
M9999-072810
hbwhelp@micrel.com or (408) 955-1690
2
Precision Edge®
SY58032U
Micrel, Inc.
AbsoluteꢀMaximumꢀRatings(1)
Operating Ratings(2)
Power Supply Voltage (VCC ) ........................–0.5V to +4.0V Power Supply Voltage (VCC) .................. +2.375V to +3.60V
Input Voltage (VIN).............................................–0.5V to VCC Ambient Temperature Range (TA)............... –40°C to +85°C
Current (VT)
Package Thermal Resistance(4)
MLF®ꢀ(θJA)
Source or sink current on VT pin......................... ±100mA
Still-Air .............................................................35°C/W
Input Current (VT)
MLF®ꢀ(ψJB)
Source or sink current on IN, /IN .......................... ±50mA
Junction-to-Board ............................................20°C/W
Current (VREF
)
Source or sink current on VREF-AC(3)....................... ±1.5mA
Lead Temperature Soldering, (20 sec.) ..................... 260°C
Storage Temperature Range (TS ) ............ –65°C to +150°C
DCꢀELECTRICALꢀCHARACTERISTICS(5)
TA= –40°C to +85°C
Symbolꢀ
Parameterꢀ
Conditionꢀ
Minꢀ
Typꢀ
Maxꢀ
Units
VCC
Power Supply Voltage
2.5V nominal
3.3V nominal
2.375
3.0
2.5
3.3
2.625
3.6
V
V
ICC
Power Supply Current
VCC = max. No load. Includes current
through 50ý pull-ups.
190
250
mA
VIH
Input HIGH Voltage
Input LOW Voltage
Input Voltage Swing
IN, /IN, Note 6
VCC–1.6
0
VCC
VIH–0.1
1.7
V
V
V
V
VIL
IN, /IN
VIN
IN, /IN, see Figure 1a.
IN, /IN, see Figure 1b.
0.1
VDIFF_IN
Differential Input Voltage Swing
|IN0, /IN0|, |IN1, /IN1|
0.2
RIN
In-to-VTꢀResistanceꢀ
ꢀ
40ꢀ
50ꢀ
60ꢀ
Ω
V
V
VT IN
Max. In-to-VT (IN, /IN)
1.28
VREF-AC
VCC–1.3 VCC–1.2 VCC–1.1
LVPECLꢀDCꢀELECTRICALꢀCHARACTERISTICS(5)
VCC = 2.5V ±5% or 3.3V ±10%; RL = 50ý to VCC–2V; TA= –40°C to +85°C, unless otherwise stated.
Symbolꢀ
VOH
Parameterꢀ
Conditionꢀ
Minꢀ
VCC–1.145
VCC–1.945
500
Typꢀ
Maxꢀ
Units
V
Output HIGH Voltage
Output LOW Voltage
Output Voltage Swing
Differential Voltage Swing
VCC–0.895
VCC–1.695
VOL
V
VOUT
see Figure 1a.
see Figure 1b.
800
mV
mV
VDIFF_OUT
1000
1600
2000
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.ꢀ Thermalꢀperformanceꢀassumesꢀexposedꢀpadꢀisꢀsolderedꢀ(orꢀequivalent)ꢀtoꢀtheꢀdevice’sꢀmostꢀnegativeꢀpotentialꢀ(GND)ꢀonꢀtheꢀPCB.ꢀꢀψJB uses 4-layer
θJA in still-air number unless otherwise stated.
5.ꢀ TheꢀcircuitꢀisꢀdesignedꢀtoꢀmeetꢀtheꢀDCꢀspecificationsꢀshownꢀinꢀtheꢀaboveꢀtablesꢀafterꢀthermalꢀequilibriumꢀhasꢀbeenꢀestablished.
6. VIH (min) not lower than 1.2V.
M9999-072810
hbwhelp@micrel.com or (408) 955-1690
3
Precision Edge®
SY58032U
Micrel, Inc.
ACꢀELECTRICALꢀCHARACTERISTICS(7)
VCC = 2.5V ±5% or 3.3V ±10%; RL = 50ý to VCC–2V; TA= –40°C to +85°C, unless otherwise stated.
Symbolꢀ
fMAX
Parameterꢀ
ꢀ
Conditionꢀ
ꢀ
Minꢀ
4ꢀ
Typꢀ
ꢀ
Maxꢀ
ꢀ
Units
GHz
ps
Maximum Operating Frequency
VOUTꢀ≥ꢀ400mVꢀ
Clockꢀ
tpd
Propagation Delay
(IN-to-Q)
180
260
35
330
tpd tempco
Differential Propagation Delay
fs/°C
ꢀ
TemperatureꢀCoefficientꢀ
ꢀ
ꢀ
ꢀ
tSKEW
Output-to-Output Skew (within Device) Note 8
7
20
ps
ps
Part-to-Part Skew
RMS Phase Jitter
Note 9
100
tJITTER
Output = 622MHZ
Integration Ranger 12kHz - 20MHz
76
75
fs
tr, tf
Output Rise/Fall Time
20% to 80%, at full output swing.
35
110
ps
Notes:
7. High frequency AC electricals are guaranteed by design and characterization. All outputs loaded with 50ý to VCC – 2V, VINꢀ≥ꢀ100mV.
8. Output-to-output skew is measured between outputs under identical transitions.
9.ꢀ Part-to-partꢀskewꢀisꢀdefinedꢀforꢀtwoꢀpartsꢀwithꢀidenticalꢀpowerꢀsupplyꢀvoltagesꢀatꢀtheꢀsameꢀtemperatureꢀandꢀwithꢀnoꢀskewꢀofꢀtheꢀedgesꢀatꢀtheꢀrespec-
tive inputs. Part-to-part skew includes variation in tpd.
PHASEꢀNOISE
RMS Phase Jitter (Random)
12kHz to 20MHz = 76fs (Typical)
PhaseꢀNoiseꢀPlot:ꢀ622MHzꢀ@ꢀ3.3V
M9999-072810
hbwhelp@micrel.com or (408) 955-1690
4
Precision Edge®
SY58032U
Micrel, Inc.
SINGLE-ENDEDꢀANDꢀDIFFERENTIALꢀSWINGS
VDIFF_IN
,
VIN,
VOUT
VDIFF_OUT 1.6V (Typ.)
800mV (Typ.)
Figureꢀ1a.ꢀ Single-EndedꢀVoltageꢀSwing
Figureꢀ1b.ꢀ DifferentialꢀVoltageꢀSwing
TIMING DIAGRAM
/IN
IN
VIN
tpd
tpd
/Q
Q
VOUT
M9999-072810
hbwhelp@micrel.com or (408) 955-1690
5
Precision Edge®
SY58032U
Micrel, Inc.
TYPICALꢀOPERATINGꢀCHARACTERISTICS
VCC = 2.5V, GND = 0, VIN = 100mV, TA= 25°C, unless otherwise stated.
∆
Output-to-Output Skew
vs. Temperature
2.5
2
1.5
1
0.5
0
-60 -40 -20
0
20 40 60 80 100
TEMPERATURE (°C)
M9999-072810
hbwhelp@micrel.com or (408) 955-1690
6
Precision Edge®
SY58032U
Micrel, Inc.
INPUT ꢀUFFER
VCC
IN
VT
50Ω
50Ω
GND
/IN
Figureꢀ2.ꢀ SimplifiedꢀDifferentialꢀInputꢀBuffer
INPUT INTERFACE APPLICATIONS
VCC
VCC
VCC
VCC
IN
/IN
VCC
VCC
LVPECL
IN
IN
SY58032U
VREF-AC
VT
CML
GND
CML
/IN
GND
VCC
/IN
VCC
SY58032U
SY58032U
0.01mF
0.01mF
GND
VREF-AC
VT
Rpd
NC
NC
VREF-AC
VT
For 2.5V, Rpd = 19W
For 3.3V, Rpd = 50W
Figureꢀ3b.ꢀAC-CoupledꢀCML
Figure 3c. LVPECL
Input Interface
Figureꢀ3a.ꢀDC-CoupledꢀCML
Input Interface
Input Interface
Option: May connect VT to VCC
.
VCC
VCC
VCC
VCC
IN
/IN
LVPECL
IN
LVDS
Rpd
Rpd
SY58032U
/IN
GND
SY58032U
VREF-AC
VT
GND
NC
NC
VREF-AC
VT
GND
For 3.3V, Rpd = 100W
For 2.5V, Rpd = 50W
VCC
Figureꢀ3d.ꢀAC-CoupledꢀLVPECL
Figure 3e. LVDS
Input Interface
Input Interface
M9999-072810
hbwhelp@micrel.com or (408) 955-1690
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Precision Edge®
SY58032U
Micrel, Inc.
LVPECL OUTPUT
LVPECL has high input impedance, and very low output Termination-Thevenin Equivalent, Parallel Termination
impedance (open emitter), and small signal swing which (3-resistor), and AC-coupled Termination. Unused output
resultsꢀinꢀlowꢀEMI.ꢀLVPECLꢀisꢀidealꢀforꢀdrivingꢀ50Ωꢀandꢀ100Ωꢀ pairsꢀ mayꢀ beꢀ leftꢀ floating.ꢀ However,ꢀ single-endedꢀ outputsꢀ
controlled impedance transmission lines. There are several must be terminated, or balanced.
techniques for terminating the LVPECL output: Parallel
+3.3V
R1
R1
130Ω
130Ω
+3.3V
+3.3V
ZO =ꢀ50Ω
O =ꢀ50Ω
Z
R2
82Ω
R2
82Ω
For +2.5V systems,
R1ꢀ=ꢀ250Ω,ꢀR2ꢀ=ꢀ62.5Ω
VT = VCC –2V
Figureꢀ4.ꢀꢀParallelꢀTermination-TheveninꢀEquivalent
+3.3V
+3.3V
Z =ꢀ50Ω
Z =ꢀ50Ω
50Ω
50Ω
“destination”
VCC
“source”
R
b
C1 (optional)
0.01µF
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 VT.
4. For 2.5V systems, Rb =ꢀ19Ω,ꢀForꢀ3.3Vꢀsystems,ꢀRb =ꢀ50Ω
Figureꢀ5.ꢀꢀParallelꢀTerminationꢀ(3-Resistor)
RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION
PartꢀNumberꢀꢀ Functionꢀ
DataꢀSheetꢀLink
SY58031U
SY58032U
SY58033U
Ultra-Precision 1:8 Fanout Buffer with 400mV CML
Outputs and Internal I/O Termination
http://www.micrel.com/product-info/products/sy58031u.shtml
Ultra-Precision 1:8 Fanout Buffer with LVPECL
Outputs and Internal Termination
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
Ultra-Precision 1:8 Fanout Buffer with 400mV LVPECL
Outputs and Internal Termination
32-MLF® Manufacturing Guidelines Exposed Pad
Application Note
HBW Solutions
M9999-072810
hbwhelp@micrel.com or (408) 955-1690
8
Precision Edge®
SY58032U
Micrel, Inc.
32-PINꢀMicroLeadFrame®ꢀ(MLF-32)
Package
EP- Exposed Pad
Die
CompSide Island
Heat Dissipation
Heat Dissipation
VEE
Heavy Copper Plane
VEE
Heavy Copper Plane
PCBꢀThermalꢀConsiderationꢀforꢀ32-PinꢀMLF®ꢀPackage
(Alwaysꢀsolder,ꢀorꢀequivalent,ꢀtheꢀexposedꢀpadꢀtoꢀtheꢀPCB)
PackageꢀNotes:
1.ꢀ PackageꢀmeetsꢀLevelꢀ2ꢀqualification.
2. All parts are dry-packaged before shipment.
3. Exposed pads must be soldered to a ground for proper thermal management.
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.
Micrelꢀreservesꢀtheꢀrightꢀtoꢀchangeꢀcircuitryꢀandꢀspecificationsꢀatꢀanyꢀtimeꢀwithoutꢀnotificationꢀtoꢀtheꢀcustomer.
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
theꢀbodyꢀorꢀ(b)ꢀsupportꢀorꢀsustainꢀlife,ꢀandꢀwhoseꢀfailureꢀtoꢀperformꢀcanꢀbeꢀreasonablyꢀexpectedꢀtoꢀresultꢀinꢀaꢀsignificantꢀinjuryꢀtoꢀtheꢀuser.ꢀAꢀPurchaser’sꢀ
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.
M9999-072810
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9
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