View SY58031U10_5045514.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Micrel, Inc.
ULTRA-PRECISION1:8 CML FANOUT bUFFER WITH INTERNAL I/O TERMINATION
Precision Edge SY58031U
Precision Edge(R) SY58031U (R)
FEATURES
Precision 1:8, 400mV CML fanout buffer Guaranteed AC performance over temperature and voltage: * Clockfrequencyrange: DCto>6GHz * <60pstr / tf time * <270pstpd * <20psouput-to-outputskew Low-jitterperformance: * 75fsRMSphasejitter(typ) 50source-terminatedCMLoutputs 400mVCMLoutputswinginto50 load FullydifferentialI/O Acceptsaninputsignalaslowas100mV Unique,patent-pendinginputterminationandVT pinacceptsDC-coupledandAC-coupleddifferential inputs:(LVPECL,LVDS,andCML) Powersupply2.5V5%or3.3V10% Industrial temperature range: -40C to +85C Availablein32-pin(5mmx5mm)MLF(R)package Precision Edge(R)
DESCRIPTION
The SY58031U is a 2.5V/3.3V precision, high-speed, fully differential CML 1:8 fanout buffer. The SY58031U is optimized to provide eight identical output copies with less than 20ps of skew and only 75fsRMS phase jitter. It can process clock signals as fast as 6GHz. The differential input includes Micrel's unique, 3-pin input termination architecture that allows the SY58031U to directly interface to CML, LVPECL, 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 CML outputs feature 400mV typical swing into 50 loads and provide an extremely fast rise/fall time guaranteed to be less than 60ps. The SY58031U operates from a 2.5V 5% supply or 3.3V 10% supply and is guaranteed over the full industrial temperature range (-40C to +85C). For applications that require high-speed 1:8 LVPECL fanout buffers, consider the SY58032U and SY58033U. The SY58031U is part of Micrel's high-speed, 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 /IN VREF-AC 50
Q3 /Q3 Q4 /Q4 Q5 /Q5 Q6 /Q6 Q7
Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc. M9999-073010 hbwhelp@micrel.com or (408) 955-1690
/Q7
Rev.: E Amendment: /0
1
Issue Date: July 2010
Micrel, Inc
Precision Edge(R) SY58031U
PACkAGE/ORDERING INFORMATION
Ordering Information(1)
GND VCC Q3 /Q3 Q4 /Q4 VCC GND
VCC Q0 /Q0 Q1 /Q1 Q2 /Q2 VCC
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 SY58031UMI SY58031UMITR(2) SY58031UMG(3) SY58031UMGTR(2, 3)
Package Operating Type Range MLF-32 MLF-32 MLF-32 MLF-32 Industiral Industrial Industiral Industrial
Package Marking SY58031U SY58031U SY58031U with Pb-Free bar-line indicator SY58031U 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 50 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 "Input Interface Applications" 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. CML Differential Output Pairs: Differential buffered output copy of the input signal. The CML output swing is typically 400mV into 50. Unused output pairs may be left floating with no impact on jitter. See "CML Output Termination" section. 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 0.01F capacitor to VCC. Maximum sink/source current is 0.5mA.
4
VT
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
GND, Exposed Pad VCC Q0, /Q0, Q1, /Q1, Q2, /Q2, Q3, /Q3, Q4, /Q4, Q5, /Q5, Q6, /Q6, Q7, /Q7 VREF-AC
M9999-073010 hbwhelp@micrel.com or (408) 955-1690
2
Micrel, Inc.
Precision Edge(R) SY58031U
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 VCC ICC VIH Parameter 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-VT Resistance Max. In-to-VT (IN, /IN) Condition 2.5V nominal 3.3V nominal VCC = max. no lead. Includes current through 50 pull-ups. IN1, /IN1, Note 6 IN1, /IN1 IN1, /IN1, see Figure 1a. IN1, /IN1, see Figure 1b. VCC-1.6 0 0.1 0.2 40 50 60 1.28 VCC-1.3 VCC-1.2 VCC-1.1 Min 2.375 3.0 Typ 2.5 3.3 265 Max 2.625 3.6 330 VCC 1.7 Units V V mA V V V V V V
VIL
VDIFF_IN RIN
VIN
VIH-0.1
VT IN
VREF-AC
CMLDCELECTRICALCHARACTERISTICS(5)
VCC = 2.5V 5% or 3.3V 10%; RL = 100 across Q and /Q; TA= -40C to +85C, unless otherwise stated. Symbol Parameter Condition Min 325 40 VOH Output HIGH Voltage Output Voltage Swing Differential Voltage Swing Output Source Impedance see Figure 1a. see Figure 1b. VCC-0.020 650 Typ 400 800 50 60 Max VCC Units V mV mV
VOUT
VDIFF_OUT ROUT
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. Thermal performance assumes exposed pad is soldered (or equivalent) to the device's most negative potential (GND) on the PCB. JB uses 4-layer JA in still-air number unless otherwise stated. 5. The circuit is designed to meet the DC specifications shown in the above tables after thermal equilibrium has been established. 6. VIH (min) not lower tha 1.2V.
M9999-073010 hbwhelp@micrel.com or (408) 955-1690
3
Micrel, Inc
Precision Edge(R) SY58031U
ACELECTRICALCHARACTERISTICS(7)
Symbol tpd fMAX VCC = 2.5V 5% or 3.3V 10%; RL = 100 across each output pair or equivalent; TA = -40C to +85C, unless otherwise stated. Parameter Condition Min 6 120 230 35 Note 8 Note 9 Output: 622MHz Integration Range: 12kHz - 20MHz 20% to 80%, at full output swing 20 7 20 100 270 Typ Max Maximum Operating Frequency Propagation Delay (IN-to-Q) Differential Propagation Delay Temperature Coefficient Output-to-Output (Within Device) Part-to-Part RMS Phase Jitter Output Rise/Fall Time VOUT 200mV Clock Units GHz ps fs/C ps ps fs 60 ps
tpd tempco tSKEW tJITTER tr, tf
Notes: 7. 8.
75 45
Output-to-output skew is measured between outputs under identical transitions.
High frequency AC electricals are guaranteed by design and characterization. All outputs loaded, VIN 100mV.
9. Part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and with no skew of the edges at the respective inputs. Part-to-part skew includes variation in tpd.
PHASENOISE
0 -10 -20 -30 -40 -50 NOISEPOWER(dBc/Hz) -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 -190 -200 10 100 1K 10K 100K 1M 10M 100M RMS Phase Jitter (Random) 12kHz to 20MHz: 75fs (Typical)
OFFSET FREQUENCY(Hz)
PhaseNoisePlot:622MHz@3.3V
M9999-073010 hbwhelp@micrel.com or (408) 955-1690
4
Micrel, Inc
Precision Edge(R) SY58031U
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
M9999-073010 hbwhelp@micrel.com or (408) 955-1690
5
Micrel, Inc.
Precision Edge(R) SY58031U
TYPICALOPERATINGCHARACTERISTICS
VCC = 2.5V, GND = 0, VIN = 100mV, TA = 25C, unless otherwise stated.
500 450 400
Amplitude vs.Frequenc y
4.0 3.5 3.0
Output-to-OutputSkew vs. Temperature
AMPLITUDE (mV)
350 250 200 150 100 50 0 VIN = 200mV
SKEW (ps)
300
2.5 2.0 1.5 1.0 0.5
10000
1000
2000
3000
4000
5000
6000
7000
8000
9000
0.0 -40 -20 0
20 40 60 80 100 120
0
TEMPERATURE ( C)
FREQUENCY (MHz)
202 200 198 196 194 192 190 188 186 184 182 180 100 200 300 400 500 600 700 800 INPUT SWING (mV)
PropagationDelay vs.InputSwing
195
PropagationDelay vs. Temperature
VIN = 400mV
PROPAGATION DELAY (ps)
PROPAGATION DELAY (ps)
190
185
180
175 -40 -20 0
20 40 60 80 100 120
TEMPERATURE ( C)
M9999-073010 hbwhelp@micrel.com or (408) 955-1690
6
Micrel, Inc
Precision Edge(R) SY58031U
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 SY58031U GND NC NC VREF-AC VT GND 0.01F VCC IN CML /IN SY58031U VREF-AC VT
GND VCC 0.01F Rpd /IN SY58031U VREF-AC VT
For 2.5V, Rpd = 19 For 3.3V, Rpd = 50
Figure3a.DC-CoupledCML Input Interface
Option: May connect VT to VCC.
VCC
Figure3b.AC-CoupledCML Input Interface
Figure 3c. LVPECL Input Interface
VCC
VCC
VCC
IN
LVPECL
/IN Rpd GND GND For 3.3V, Rpd = 100 For 2.5V, Rpd = 50 Rpd VT VREF-AC
GND NC NC LVDS
IN
SY58031U
/IN SY58031U VREF-AC VT
VCC
Figure3d.AC-CoupledLVPECL Input Interface
M9999-073010 hbwhelp@micrel.com or (408) 955-1690
Figure 3e. LVDS Input Interface
7
Micrel, Inc.
Precision Edge(R) SY58031U
CML OUTPUT TERMINATION
Figure 4 and Figure 5 illustrate how to terminate a CML output using both the AC- and DC-coupled configuration.
VCC SY58031U 50 50 Q ZO = 50 100 /Q ZO = 50 16mA GND /Q
All outputs of the SY58031U are 50 with a 16mA current source.
VCC SY58031U 50 50 Q ZO = 50 50 50 ZO = 50 DC bias per application 16mA GND
Figure4. CMLDC-CoupledTermination
Figure5. CMLAC-CoupledTermination
RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION
PartNumber SY58031U SY58032U SY58033U Function Ultra-Precision 1:8 CML Fanout Buffer with Internal I/O Termination Ultra-Precision 1:8 LVPECL Fanout Buffer with Internal Termination Ultra-Precision 1:8 400mV Fanout Buffer with 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.pdf http://www.micrel.com/product-info/as/solutions.shtml
M9999-073010 hbwhelp@micrel.com or (408) 955-1690
8
Micrel, Inc
Precision Edge(R) SY58031U
32-PINMicroLeadFrame(R)(MLF-32)
Package EP- Exposed Pad
Die
CompSide Island
Heat Dissipation
Heat Dissipation Heavy Copper Plane VEE
Heavy Copper Plane
VEE
PCBThermalConsiderationfor32-PinMLF(R)Package (Alwayssolder,orequivalent,theexposedpadtothePCB)
PackageNotes: 1. 2. 3. Package meets Level 2 qualification. All parts are dry-packaged before shipment. 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. Micrel reserves the right to change circuitry and specifications at any time without notification 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 significant 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. (c) 2005 Micrel, Incorporated. M9999-073010 hbwhelp@micrel.com or (408) 955-1690
tel
+ 1 (408) 944-0800
fax
+ 1 (408) 474-1000
web
http://www.micrel.com
9

▲Up To Search▲

Price & Availability of SY58031U10

	To Download SY58031U10 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .