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1 sy58011u micrel, inc.m9999-110311 hbwhelp@micrel.com or (408) 955-1690 1 description - precision 1:2, 400mv cml fanout buffer - low jitter performance: 49fs rms phase jitter (typ) - guaranteed ac performance over temperature/ voltage: > 7ghz f max clock < 60ps t r /t f times < 250ps t pd < 15ps max. skew - accepts an input signal as low as 100mv - unique input termination and v t pin accepts dc- coupled and ac-coupled differential inputs: lvpecl, lvds, and cml - 50ohms source terminated cml outputs - power supply 2.5v 5% and 3.3v 10% - industrial temperature range: C40c to +85c - available in 16-pin (3mm ?? ?? ? 3mm) qfn package features 7ghz, 1:2 cml fanout buffer/translator with internal i/o termination precision edge ? sy58011u applications - all sonet and gige clock distribution - fibre channel clock and data distribution - backplanes - data distribution: oc-48, oc-48+fec, xaui - high-end, low skew, multiprocessor synchronousclock distribution rev.: g amendment: /0 issue date: november 2011 the sy58011u is a 2.5v/3.3v precision, high-speed, fully differential 1:2 cml fanout buffer. optimized to provide twoidentical output copies with less than 15ps of skew and only 49fs rms phase jitter, the sy58011u can process clock signals as fast as 7ghz or data patterns up to 10.7gbps. the differential input includes micrels unique, 3-pin input termination architecture that interfaces to lvpecl, lvds,or cml differential signals, (ac-coupled or dc-coupled) as small as 100mv without any level-shifting or termination resistor networks in the signal path. for ac-coupled input interface applications, an on-board output reference voltage (v ref -ac) is provided to bias the v t pin. the outputs are compatible with 400mv typical swing into 50ohms loads,with extremely fast rise/fall times guaranteed to be less than 60ps. the sy58011u operates from a 2.5v 5% supply or 3.3v 10% supply and is guaranteed over the full industrialtemperature range (C40c to +85c). for applications that require lvpecl outputs, consider the sy58012u or sy58013u 1:2 fanout buffer with 800mv and 400mv output swing, respectively. the sy58011u is part of micrels high- speed, precision edge ? product line. datasheets and support documentation can be found on micrels web site at www.micrel.com. functional block diagram typical performance precision edge is a registered trademark of micrel, inc. in /in q1/q1 q0/q0 v t 50 50 v ref -ac 2ghz output time (70ps/div.) output swing (100mv/div.) v cc = 2.5v 2ghz with 100mv input precision edge ? downloaded from: http:///
2 sy58011u micrel, inc.m9999-110311 hbwhelp@micrel.com or (408) 955-1690 package/ordering information pin number pin name pin function 1, 4 in, /in differential input: this input pair is the signal to be buffered. each pin of this pair internally terminates with 50ohms to the v t pin. note that this input will default to an indeterminate state if left open. see input interface applications section. 2 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 a termination network for maximum interface flexibility. see input interface applications section. 3 vref-ac reference output voltage: this output biases to v cc C1.2v. it is used when ac-coupling the inputs (in, /in). connect v ref -ac directly to the v t pin. bypass with 0.01 f low esr capacitor to v cc . maximum current source or sink is 0.5ma. see input interface applica tions section. 5, 8, 13, 16 vcc positive power supply: bypass with 0.1 f//0.01 f low esr capacitors as close to the v cc pins as possible. 6, 7, 14, 15 gnd, ground. exposed pad must be connected to a ground plane that is the same potential (exposed pad) as the ground pin. 12, 11 q0, /q0, cml differential output pairs: differential buffered output copy of the input signal. the 9, 10 q1, /q1 output swing is typically 400mv. unused output pairs may be left floating with no impact on jitter. see cml output termination section. pin description 13 14 15 16 1211 10 9 12 3 4 8 7 6 5 in vt vref-ac /in q0 /q0 /q1 q1 vcc gnd gnd vcc vcc gnd gnd vcc 16-pin qfn (qfn-16) ordering information (1) package operating package part number type range marking sy58011umg (3) qfn-16 industrial 011u with pb-free pb-free bar-line indicator sy58011umgtr (2, 3) qfn-16 industrial 011u with pb-free pb-free bar-line indicator notes: 1. contact factory for die availability. dice are guaranteed at t a = 25c, dc electricals only. all devices are pb-free. 2. tape and reel. 3. pb-free package recommended for new designs. downloaded from: http:///
3 sy58011u micrel, inc.m9999-110311 hbwhelp@micrel.com or (408) 955-1690 absolute maximum ratings (note 1) power supply voltage (v cc ) ....................... C0.5v to +4.0v input voltage (v in ) ......................................... C0.5v to v cc cml output voltage (v out ) ........... v cc C1.0v to v cc +0.5v current (v t ) source or sink current on v t pin........................ 100ma input current source or sink current on in, /in ......................... 50ma current (v ref ) source or sink current on v ref -ac, note 4 ....... 1.5ma lead temperature soldering, (20 seconds) ............. 260c storage temperature range (t store ) ... C65c to +150c operating ratings (note 2) supply voltage (v cc ) ............................ +2.375v to +3.60v operating temperature range (t a ) .......... C40c to +85c package thermal resistance, note 3 qfn ( ja ) still-air ............................................................ 60c/w 500lfpm ........................................................... 54c/w qfn ( jb ) ........................................................... 33c/w t a = C40c to +85c symbol parameter condition min typ max units v cc power supply voltage 2.375 3.60 v i cc power supply current max. v cc , no load 75 95 ma v ih input high voltage in, /in, note 6 v cc C1.6 v cc v v il input low voltage in, /in 0 v ih C0.1 v v in input voltage swing see figure 1a. 0.1 1.7 v v diff_in differential input voltage swing see figure 1b. 0.2 v r in into v t resistance 40 50 60 y v ref -ac output reference voltage v cc C1.3 v cc C1.2 v cc C1.1 v in to v t 1.28 v dc electrical characteristics (note 5) v cc = 3.3v 10% or 2.5v 5%; t a = C40c to +85c; r l = 100y across each output pair, or equivalent, unless otherwise stated. symbol parameter condition min typ max units v oh output high voltage q0, /q0, q1, /q1 v cc C0.020 v cc C0.010 v cc v v out output voltage swing q0, /q0, q1, /q1; see figure 1a. 325 400 mv v diff_out differential output voltage swing q0, /q0, q1, /q1; see figure 1b. 650 800 mv r out output source impedance q0, /q0, q1, /q1 40 50 60 ohms 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 devices most negative potential (gnd) on the pcb. 4. due to the limited drive capability, use for input of the same package only. 5. the circuit is designed to meet the dc specifications shown in the above table after thermal equilibrium has been established . 6. v ih (min) not lower than 1.2v. cml dc electrical characteristics (note 5) downloaded from: http:///
4 sy58011u micrel, inc.m9999-110311 hbwhelp@micrel.com or (408) 955-1690 v cc = 2.5v 5% or 3.3v 10%; t a = C40c to +85c; r l = 100ohms across each output pair, or equivalent, unless otherwise stated. symbol parameter condition min typ max units f max maximum operating frequency nrz data 10.7 gbps v out > 200mv clock 7 8 ghz t pd propagation delay v in > 100mv 100 170 250 ps t chan channel-to-channel skew note 8 31 5p s t skew part-to-part skew note 9 100 ps t jitter rms phase jitter output = 622mhz 49 fs rms integration range: 12khz - 20mhz t r , t f output rise/fall time 20% to 80% at full output swing 20 40 60 ps notes:7. high frequency ac electricals are guaranteed by design and characterization. 8. skew is measured between outputs of the same bank under identical transitions. 9. 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. ac electrical characteristics (note 7) phase noise rms phase jitter (random) 12khz to 20mhz = 49fs (typical) offset frequency (hz) noise power (dbc/hz) phase noise plot: 622mhz @ 3.3v downloaded from: http:///
5 sy58011u micrel, inc.m9999-110311 hbwhelp@micrel.com or (408) 955-1690 single-ended and differential swings v in , v out (typ. 400mv) figure 1a. single-ended voltage swing v diff_in , v diff_out (typ. 800mv) figure 1b. differential voltage swing timing diagram /in in /q q t pd downloaded from: http:///
6 sy58011u micrel, inc.m9999-110311 hbwhelp@micrel.com or (408) 955-1690 0 50 100 150 200 250 300 350 400 450 500 0 20004000 6000 8000 1000012000 amplitude (mv) frequency (mhz) frequency vs. amplitude typical operating characteristics v cc = 3.3v, gnd = 0, v in = 100mv, t a = 25c, unless otherwise stated. 0 1 2 3 4 5 6 7 8 9 10 -40 -20 0 20 40 60 80 100 within-device skew (ps) temperature ( c) within-device skew vs. temperature 150 152 154 156 158 160 162 0 200 400 600 800 1000 propagation delay (ps) input voltage swing (v) propagation delay vs. input voltage swing 125 130 135 140 145 150 155 160 165 170 175 180 185 -40 -20 0 20 40 60 80 100 propagation delay (ps) temperature ( c) propagation delay vs. temperature v in 200mv downloaded from: http:///
7 sy58011u micrel, inc.m9999-110311 hbwhelp@micrel.com or (408) 955-1690 functional characteristics v cc = 2.5v, gnd = 0, v in = 100mv, t a = 25c, unless otherwise stated. 2ghz output time (70ps/div.) output swing (100mv/div.) v cc = 2.5v 7ghz output time (20ps/div.) output swing (100mv/div.) 200mhz output time (600ps/div.) output swing (100mv/div.) downloaded from: http:///
8 sy58011u micrel, inc.m9999-110311 hbwhelp@micrel.com or (408) 955-1690 input interface applications cml in /invt nc sy58011u v cc v cc v ref -ac nc figure 3a. dc-coupled cml input interface (option: may connect v t to v cc ) 0.01f v cc lvpecl in /in sy58011u v cc v ref -ac v t v cc nc r pd note:for v cc = 2.5v systems, r pd = 19. for v cc = 3.3v systems, r pd = 50. figure 3c. lvpecl input interface

! figure 3d. ac-coupled lvpecl input interface
figure 3e. lvds input interface
figure 3b. ac-coupled cml input interface input stage
figure 2. simplified differential input buffer downloaded from: http:///
9 sy58011u micrel, inc.m9999-110311 hbwhelp@micrel.com or (408) 955-1690 part number function data sheet link sy58011u 7ghz, 1:2 cml fanout buffer/translator with http://www.micrel.com/pro duct-info/products/sy58011u.shtml internal i/o termination sy58012u 5ghz, 1:2 lvpecl fanout buffer/translator with http://www.micrel.com/product-info/products/sy58012u.shtml internal input termination sy58013u 6ghz, 1:2 fanout buffer/translator with 400mv http://www.micrel.com/product-info/products/sy58013u.shtml lvpecl outputs and internal input termination16-mlf ? manufacturing guidelines www.amkor.com/products/notes_papers/mlf_appnote_0902.pdf exposed pad application notehbw solutions http://www.micrel.com/product-info/as/solutions.shtml related micrel products and support documentation cml output termination figure 4 and figure 5 illustrates how to terminate a cml output using both the ac-coupled and dc-coupled configuration. all outputs of the sy58011 are 50ohms with a16ma current source. figure 4. cml dc-coupled termination
figure 5. cml ac-coupled termination downloaded from: http:///
10 sy58011u micrel, inc.m9999-110311 hbwhelp@micrel.com or (408) 955-1690 16-pin qfn (qfn-16) package ep- exposed pad die compside islandheat dissipation heavy copper plane heavy copper plane v ee v ee heat dissipation pcb thermal consideration for 16-pin qfn package (always solder, or equivalent, the exposed pad to the pcb) package notes: 1. package meets level 2 qualification. 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 us a tel +1 (408) 944-0800 fax +1 (408) 474-1000 web http://www.micrel.com micrel makes no representations or warranties with respect to the accuracy or co mpleteness of the information furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for its use. mi crel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether express, implied, ari sing by estoppel or other wise, to any intellectual property rights is granted by this document. except as provided in micrels terms and conditions of sale for such products, mi crel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/or use of micrel produc ts including l iability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right micrel products are not designed or authorized for use as components in life support appliances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. life support devices or systems are devices or syste ms that (a) are in tended 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 si gnificant injury to the user. a purchasers use or sale of micrel products for use in life support appliances, devices or systems is a purchasers own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2005 micrel, incorporated. downloaded from: http:///

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