1 precision edge sy58012u micrel, inc. m9999-020207 hbwhelp@micrel.com or (408) 955-1690 description precision 1:2, 800mv lvpecl fanout buffer guaranteed ac performance over temperature/ voltage: > 5ghz f max (clock) < 110ps t r /t f times < 260ps t pd < 15ps max skew low jitter performance < 10ps pp total jitter (clock) < 1ps rms random jitter (data) < 10ps pp deterministic jitter (data) accepts an input signal as low as 100mv unique input termination and v t pin accepts dc- and ac-coupled differential inputs: lvpecl, lvds, and cml outputs are 100k lvpecl compatible, 800mv swing power supply 2.5v 5% and 3.3v 10% ?0 c to +85 c temperature range available in 16-pin (3mm 3mm) mlf package features 5ghz, 1:2 lvpecl fanout buffer/translator with internal input termination precision edge sy58012u applications all sonet and gige clock distribution fibre channel clock and data distribution backplane distribution high-end, low skew, multiprocessor synchronous clock distribution rev.: d amendment: /0 issue date: february 2007 the sy58012u is a 2.5v/3.3v precision, high-speed, fully differential 1:2 lvpecl fanout buffer. optimized to provide two identical output copies with less than 15ps of skew and less than 10ps (pk-pk) total jitter, the sy58012u can process clock signals as fast as 5ghz or 5gbps data. the differential input includes micrel? 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 100k lvpecl compatible, with extremely fast rise/fall times guaranteed to be less than 110ps. the sy58012u operates from a 2.5v 5% supply or 3.3v 10% supply and is guaranteed over the full industrial temperature range (?0 c to +85 c). for applications that require faster rise/fall times, or greater bandwidth, consider the sy58013u 1:2 fanout buffer with 400mv output swing, or the sy58011 1:2 cml (400mv) fanout buffer. the sy58012u is part of micrel? high-speed, precision edge product line. data sheets and support documentation can be found on micrel? web site at www.micrel.com. functional block diagram typical performance in /in q1 /q1 q0 /q0 v t 50 ? 50 ? v ref -ac 2.5ghz output time (50ps/div.) output swing (200mv/div.) v cc = 3.3v 2ghz with 100mv input precision edge precision edge is registered trademark of micrel, inc. micro leadframe and mlf are registered trademarks of amkor technology, inc.
2 precision edge sy58012u micrel, inc. m9999-020207 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 50 ? 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 1.2v. 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 applications 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, lvpecl differential output pairs: differential buffered output copy of the input signal. the 9, 10 q1, /q1 output swing is typically 800mv. unused output pairs may be left floating with no impact on jitter. see lvpecl output termination section. pin description 13 14 15 16 12 11 10 9 1 2 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 mlf (mlf-16) ordering information (1) package operating package lead part number type range marking finish sy58012umi mlf-16 industrial 012u sn-pb sy58012umitr (2) mlf-16 industrial 012u sn-pb sy58012umg (3) mlf-16 industrial 012u with pb-free pb-free bar-line indicator nipdau SY58012UMGTR (2, 3) mlf-16 industrial 012u with pb-free pb-free bar-line indicator nipdau notes: 1. contact factory for die availability. dice are guaranteed at t a = 25 c, dc electricals only. 2. tape and reel. 3. pb-free package recommended for new designs.
3 precision edge sy58012u micrel, inc. m9999-020207 hbwhelp@micrel.com or (408) 955-1690 absolute maximum ratings (note 1) power supply voltage (v cc ) ...................... 0.5v to +4.0v input voltage (v in ) ......................................... 0.5v to v cc lvpecl output current (i out ) continuous ............................................................. 50ma surge .................................................................... 100ma source or sink current on v t pin v t current .......................................................... 100ma source or sink current on in, /in input current ........................................................ 50ma source or sink current on v ref-ac , note 4 v ref current ....................................................... 1.5ma soldering, (20 seconds) ............................................ 260 c storage temperature range (t store ) ... 65 c to +150 c operating ratings (note 2) power supply voltage (v cc ) ..................... 2.375v to 3.60v operating temperature range (t a ) ........... 40 c to +85 c package thermal resistance, note 3 mlf ( ja ) still-air ............................................................. 60 c/w 500 lpfm ........................................................... 54 c/w mlf ( jb ) .......................................................... 33 c/w input dc electrical characteristics (note 5) v cc = 3.3v 10% or 2.5 5%; r l = 50 ? to v cc 2v; t a = 40 c to 85 c, unless otherwise stated. symbol parameter condition min typ max units v oh output high voltage q0, /q0, q1, /q1 v cc 1.145 v cc 0.895 v v ol output low voltage q0, /q0, q1, /q1 v cc 1.945 v cc 1.695 v v out output voltage swing q0, /q0, q1, /q1; see figure 1a 550 800 mv v diff_out differiential output voltage swing q0, /q0, q1, /q1; see figure 1b 1100 1600 mv note 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional operat ion is not implied at conditions other than those detailed in the operational sections of this data sheet. exposure to absolute maximum r atings condi- tions for extended periods may affect device reliability note 2. the data sheet limits are not guaranteed if the device is operated beyond the operating ratings. note 3. thermal performance assumes exposed pad is soldered (or equivalent) to the device s most negative potential on the pcb. note 4. due to the limited drive capability, use for input of the same package only. note 5. the circuit is designed to meet the dc specifications shown in the above table after thermal equilibrium has been established. lvpecl output dc electrical characteristics (note 5) 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 55 80 ma v ih input high voltage in, /in v cc 1.2 v cc v v il input low voltage in, /in 0 v ih 0.1 v v in input voltage swing in, /in; see figure 1a 0.1 1.7 v v diff_in differential input voltage swing in,/in; see figure 1b 0.2 3.4 v r in in to v t resistance 40 50 60 ? in to v t 1.28 v v ref -ac output reference voltage v cc 1.3 v cc 1.2 v cc 1.1 v
4 precision edge sy58012u micrel, inc. m9999-020207 hbwhelp@micrel.com or (408) 955-1690 timing diagram /in in /q q t pd single-ended and differential swings v in , v out typ. 800mv figure 1a. single-ended voltage swing v diff_in , v diff_out typ. 1.6v figure 1b. differential voltage swing v cc = 2.5v 5% or 3.3v 10%; t a = 40 c to +85 c; r l = 50 ? to v cc 2v, unless otherwise stated. symbol parameter condition min typ max units f max maximum operating frequency nrz data 5 gbps v out 400mv clock 5 ghz t pd propagation delay v in 100mv 110 170 260 ps t chan channel-to-channel skew note 8 315ps t skew part-to-part skew note 9 100 ps t jitter data random jitter (rj) note 10 1ps rms deterministic jitter (dj) note 11 10 ps pp clock cycle-to-cycle jitter note 12 1ps rms total jitter (tj) note 13 10 ps pp t r , t f output rise/fall time 20% to 80% at full output swing 35 80 110 ps note 7. high frequency ac electricals are guaranteed by design and characterization. note 8. skew is measured between outputs of the same bank under identical transitions. note 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. note 10. rj is measured with a k28.7 comma detect character pattern, measured at 10.7gbps and 2.5gbps/3.2gbps. note 11. dj is measured at 10.7gbps and 2.5gbps/3.2gbps with both k28.5 and 2 23 1 prbs pattern note 12. cycle-to-cycle jitter definition: the variation of periods between adjacent cycles, t n t n 1 where t is the time between rising edges of the output signal. note 13. total jitter definition: with an ideal clock input of frequency f max , no more than one output edge in 10 12 output edges will deviate by more than the specified peak-to-peak jitter value. ac electrical characteristics (note 7)
5 precision edge sy58012u micrel, inc. m9999-020207 hbwhelp@micrel.com or (408) 955-1690 typical operating characteristics v cc = 3.3v, gnd = 0, v in = 100mv, t a = 25 c, 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 155 160 165 170 175 180 185 190 0 200 400 600 800 1000 propagation delay (ps) input voltage swing (v) propagation delay vs. input volta g e swin g 135 140 145 150 155 160 165 170 175 180 185 190 195 -40 -20 0 20 40 60 80 100 propagation delay (ps) temperature ( c) propagaton delay vs. temperature 0 100 200 300 400 500 600 700 800 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 amplitude (mv) frequency (mhz) frequency vs. amplitude
6 precision edge sy58012u micrel, inc. m9999-020207 hbwhelp@micrel.com or (408) 955-1690 functional characteristics v cc = 3.3v, gnd = 0, v in = 100mv, t a = 25 c, unless otherwise stated. 5gbps output time (50ps/div.) output swing (150mv/div.) 5ghz output time (25ps/div.) output swing (100mv/div.) 200mhz output time (600ps/div.) output swing (200mv/div.) (2 23 1 prbs pattern)
7 precision edge sy58012u micrel, inc. m9999-020207 hbwhelp@micrel.com or (408) 955-1690 input stage 50 ? 50 ? v cc gnd /in v t in figure 2. simplified differential input buffer input interface applications cml in /in vt nc sy58012u v cc v cc v ref -ac nc figure 3d. dc-coupled cml input interface (option: may connect v t to v cc ) lvpecl in /in vt sy58012u v cc r pd v cc v ref -ac nc note: for v cc = 2.5v system, r pd = 19 ? for v cc = 3.3v system, r pd = 50 ? 0.01 f figure 3a. lvpecl input interface lvpecl in /in vt sy58012u v cc v cc v cc 0.01 f r pd r pd v ref -ac note: for v cc = 3.3v system, r pd = 100 ? for v cc = 2.5v system, r pd = 50 ? figure 3b. ac-coupled lvpecl input interface lvds in /in vt nc sy58012u v cc v cc v ref -ac nc figure 3c. lvds input interface cml in /in vt 0.01 m f sy58012u v cc v cc v cc v ref -ac figure 3e. ac-coupled cml input interface
8 precision edge sy58012u micrel, inc. m9999-020207 hbwhelp@micrel.com or (408) 955-1690 part number function data sheet link sy58011u 7ghz, 1:2 cml fanout buffer/translator http://www.micrel.com/product-info/products/sy58011u.shtml with internal input termnations sy58012u 5ghz, 1:2 lvpecl fanout buffer/translator http://www.micrel.com/product-info/products/sy58012u.shtml with internal input termination sy58013u 6ghz, 1:2 fanout buffer/translator w/400mv http://www.micrel.com/product-info/products/sy58013u.shtml lvpecl outputs and internal terminations 16-mlf manufacturing guidelines www.amkor.com/products/notes_papers/mlf_appnote_0902.pdf exposed pad application note m-0317 hbw solutions http://www.micrel.com/product-info/as/solutions.shtml related micrel products and support documentation r2 82 ? r2 82 ? z o = 50 ? z o = 50 ? +3.3v* +3.3v* v t = v cc 2 v r1 130 ? r1 130 ? +3.3v* figure 5. parallel termination-thevenin equivalent note 1. for +2.5v systems: r1 = 250 ? , r2 = 62.5 ? note 2. for +3.3v systems: r1 = 130 ? , r2 = 82 ? z = 50 ? z = 50 ? 50 ? 50 ? 50 ? +3.3v +3.3v source destination r b c1 0.01 f (optional) figure 6. three-resistor y termination note 1. power-saving alternative to thevenin termination. note 2. place termination resistors as close to destination inputs as possible. note 3. r b resistor sets the dc bias voltage, equal to v t . for +2.5v systems r b = 19 ? . for +3.3v systems r b = 46 ? to 50 ? . note 4. c1 is an optional bypass capacitor intended to compensate for any t r /t f mismatches. lvpecl output +3.3v +3.3v z o = 50 ? r2 82 ? +3.3v +3.3v r1 130 ? r1 130 ? r2 82 ? v t = v cc 2v q /q r4 1k ? r3 1.6k ? v t = v cc 1.3v figure 7. terminating unused i/o note 1. unused output (/q) must be terminated to balance the output. note 2. for +2.5v systems: r1 = 250 ? , r2 = 62.5 ? , r3 = 1.25k ? , r4 = 1.2k ? . for +3.3v systems: r1 = 130 ? , r2 = 82 ? , r3 = 1k ? , r4 = 1.6k ? . note 3. unused output pairs (q and /q) may be left floating. lvpecl output have very low output impedance (open emitter), and small signal swing which results in low emi. lvpecl is ideal for driving 50 ? and 100 ? controlled impedance transmission lines. there are several techniques in terminating the lvpecl output, as shown in figures 5 through 7.
9 precision edge sy58012u micrel, inc. m9999-020207 hbwhelp@micrel.com or (408) 955-1690 16-pin micro leadframe (mlf-16) 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 16-pin mlf package (always solder, or equivalent, the exposed pad to the pcb) package notes: note 1. package meets level 2 qualification. note 2. all parts are dry-packaged before shipment. note 3. exposed pads must be soldered to a ground for proper thermal management. micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 web http://www.micrel.com the information furnished by micrel in this datasheet is believed to be accurate and reliable. however, no responsibility is as sumed 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 malfu nction of a product can reasonably be expected to result in personal injury. life support devices or systems are devices or systems that (a) are intend ed 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 inj ury 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.
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