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1 precision edge ? sy58029u micrel, inc.m9999-082707 hbwhelp@micrel.com or (408) 955-1690 description ? selects 1 of 4 differential inputs ? provides two copies of the selected input ? guaranteed ac performance over temperature andvoltage: dc-to-> 5gbps data rate throughput < 390ps in-to-out t pd < 110ps t r /t f times ? ultra low-jitter design: < 10ps pp total jitter (clock) < 1ps rms random jitter < 10ps pp deterministic jitter < 0.7ps rms crosstalk-induced jitter ? unique patended input design minimizes crosstalk ? accepts an input signal as low as 100mv ? unique patented input termination and v t pin accepts dc- and ac-coupled inputs (cml, lvpecl,lvds) ? 800mv 100k lvpecl output swing ? power supply 2.5v 5% or 3.3v 10% ? C40c to +85c temperature range ? available in 32-pin (5mm ? ? 5mm) mlf ? package features ultra precision differential lvpecl 4:1 mux with 1:2 fanout and internal termination precision edge ? sy58029u applications ? redundant clock and/or distribution ? all sonet/sdh clock/data distribution ? loopback ? all fibre channel distribution ? all gigabit ethernet clock and/or data distribution rev.: d amendment: /0 issue date: august 2007 the sy58029u is a 2.5v/3.3v precision, high-speed, 4:1 differential multiplexer with 100k lvpecl (800mv)compatible outputs, capable of handling clocks up to 4ghz and data streams up to 5gbps. in addition, a 1:2 fanout buffer provides two copies of the selected inputs. the differential input includes micrel?s unique, 3-pin input termination architecture that allows customers to interfaceto any differential signal (ac- or dc-coupled) as small as 100mv without any level shifting or termination resistor networks in the signal path. the result is a clean, stub-free, low-jitter interface solution. the outputs are 800mv lvpecl, (100k temperature compensated) with extremely fast rise/ fall times guaranteed to be less than 110ps. the sy58029u operates from a 2.5v 5% supply or a 3.3v 10% supply and is guaranteed over the full industrial temperature range of ?40c to +85c. for applications that require cml outputs, consider the sy58028u. for 400mv lvpecl outputs, consider the sy58030u. the sy58029u 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. typical performance precision edge is a registered trademark of micrel, inc.micro leadframe and mlf are registered trademarks of amkor technology, inc. precision edge ? functional block diagram in0 /in0 v t0 50 ? 50 ? in1 /in1 v t1 50 ? 50 ? q 0 /q 0 01 mux 4:1 mux 1:2 fanout v ref-ac0 in2 /in2 v t2 50 ? 50 ? v ref-ac2 v ref-ac1 2 in3 /in3 v t3 50 ? 50 ? v ref-ac3 3 sel0 (cmos/ttl) sel1 (cmos/ttl) q 1 /q 1

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2 precision edge ? sy58029u micrel, inc.m9999-082707 hbwhelp@micrel.com or (408) 955-1690 package/ordering information 2423 22 21 20 19 18 17 gndvcc q1 /q1 vcc nc sel1 vcc in0 vt0 vref-ac0 /in0 in1 vt1 vref-ac1 /in1 12 3 4 5 6 7 8 910111213141516 32 31 30 29 28 27 26 25 /in2 in3 vt3 vref-ac3 /in3vref-ac2 vt2 in2 vcc q0 /q0 vcc gnd nc sel0 vcc 32-pin mlf ? (mlf-32) pin number pin name pin function 1, 4 in0, /in0 differential input: each pair accepts ac- or dc-coupled signals as small as 100mv. 5, 8 in1, /in1 each pin of a pair internally terminates to a v t pin through 50y. note that these 25, 28 in2, /in2 inputs will default to an indeterminate state if left open. if an input is not used, connect one 29, 32 in3, /in3 end of the differential pairs to ground through a 1ky resistor, and leave the other end to v cc through a 825y resistor. unused v t and v ref-ac pins may also be left floating. please refer to the ?input interface applications? section for more details. 2, 6, 26, 30 vt0, vt1 input termination center-tap: each side of the differential input pair terminates to a v t vt2, vt3 pin. the v t pin provides a center-tap to the termination network for maximum interface flexibility. see ?input interface applications? section for more details. 15, 18 sel0, sel1 this single-ended ttl/cmos compatible input selects the inputs to the multiplexer. note that this input is internally connected to a 25ky pull-up resistor and will default to a logic high state if left open. input logic threshold is v cc /2. see ?truth table? for select control. 14, 19 nc no connect. 10, 13, 16 vcc positive power supply: bypass with 0.1 f ?? 0.01 f low esr capacitors. 17, 20, 23 11, 12 /q0, q0 differential outputs: these 100k compatible (internally temperature compensated) 21, 22 /q1, q1 lvpecl output pairs are copies of the selected input. unused output pins may be left floating. see ?output interface? for terminating guidelines. 9, 24 gnd, ground. ground pin and exposed pad must be connected to the same ground plane. exposed pad 3, 7, 27, 31 vref-ac0 reference voltage: this reference output is equivalent to v cc ?1.4v. it is used for vref-ac1 ac-coupled inputs. when interfacing to ac input signals, connect v ref-ac directly to the vref-ac2 v t pin and bypass with 0.01f low esr capacitor to v cc . see ?input interface applica- vref-ac3 tions? section. maximum sink/source current is 0.5ma. pin description truth table sel1 sel0 0 0 in0 input selected 0 1 in1 input selected 1 0 in2 input selected 1 1 in3 input selected ordering information (1) package operating package lead part number type range marking finish sy58029umi mlf-32 industrial sy58029u sn-pb sy58029umitr (2) mlf-32 industrial sy58029u sn-pb SY58029UMG (3) mlf-32 industrial sy58029u with pb-free pb-free bar-line indicator nipdau SY58029UMGtr (2, 3) mlf-32 industrial sy58029u with pb-free pb-free bar-line indicator nipdau notes: 1. contact factory for die availability. dice are guaranteed at t a = 25c, dc electricals only. 2. tape and reel. 3. pb-free package recommended for new designs. downloaded from: http:///
3 precision edge ? sy58029u micrel, inc.m9999-082707 hbwhelp@micrel.com or (408) 955-1690 absolute maximum ratings (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 termination current (3) source or sink current on v t pin......................... 100ma input current source or sink current on in, /in pin .................... 50ma lead temperature (soldering, 20 sec.) ..................... 260c storage temperature range (t s ) ........... ?65c to +150c operating ratings (2) power supply voltage (v cc ) ............... +2.375v to +2.625v ............................................................. +3.0v to +3.6v ambient temperature range (t a ) .............. ?40c to +85c package thermal resistance (4) mlf ? ( ja ) still-air ............................................................. 50c/w mlf ? ( jb ) junction-to-board ............................................ 20c/w t a = ?40c to +85c, unless otherwise stated. symbol parameter condition min typ max units v cc power supply voltage v cc = 2.5v 2.375 2.5 2.625 v v cc = 3.3v 3.0 3.3 3.6 v i cc power supply current no load, max. v cc 110 140 ma r diff_in differential input resistance (in-to-/in) 80 100 120 y r in input resistance (in-to-/in, /in-to-v t ) 40 50 60 y v ih input high voltage (in-to-/in) note 6 v cc ?1.6 v cc v v il input low voltage (in-to-/in) 0v ih ?0.1 v v in input voltage swing (in-to-/in) see figure 1a. 0.1 1.7 v v diff_in differential input voltage swing (in-to-/in) see figure 1b. 0.2 v v t in max input voltage (in-to-v t ) 1.28 v v ref-ac reference voltage v cc ?1.3 v cc ?1.2 v cc ?1.1 v notes: 1. permanent device damage may occur if ratings in the ?absolute maximum ratings? section 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 abs olute 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 table after thermal equilibrium has been established . 6. v ih (min) not lower than 1.2v. dc electrical characteristics (5) downloaded from: http:///
4 precision edge ? sy58029u micrel, inc.m9999-082707 hbwhelp@micrel.com or (408) 955-1690 v cc = 2.5v 5% or 3.3v 10%; t a = ?40c to +85c; r l = 50y to v cc ?2v across each output pair, unless otherwise stated. symbol parameter condition min typ max units v oh output high voltage v cc ?1.145 v cc ?0.895 v v ol output low voltage v cc ?1.945 v cc ?1.695 v v out output voltage swing see figure 1a. 550 800 mv v diff_out differential output voltage swing see fi gure 1b. 1100 1600 mv lvpecl output dc electrical characteristics (7) v cc = 2.5v 5% or 3.3v 10%; t a = ?40c to +85c, unless otherwise stated. symbol parameter condition min typ max units v ih input high voltage sel0, sel1 2.0 v v il input low voltage sel0, sel1 0.8 v i ih input high current 40 a i il input low current ?300 a note: 7. the circuit is designed to meet the dc specifications shown in the above table after thermal equilibrium has been established . lvttl/cmos dc electrical characteristics (7) downloaded from: http:///
5 precision edge ? sy58029u micrel, inc.m9999-082707 hbwhelp@micrel.com or (408) 955-1690 v cc = 2.5v 5% or 3.3v 10%; r l = 50y to v cc ?2v; t a = ?40c to +85c, v in ? 100mv, unless otherwise stated. symbol parameter condition min typ max units f max maximum operating frequency nrz data 5 gbps v out ? 400mv clock 4 ghz t pd propagation delay (diff) (in-to-q) v in ? 100mv 215 390 ps (sel-to-q) 100 500 ps t pd tempco differential propagation d elay 115 fs/c temperature coefficient t skew output-to-output note 9 71 5p s part-to-part note 10 100 ps t jitter data random jitter note 11 2.5gbps to 3.2gbps 1 ps rms deterministic jitter note 12 2.5gbps to 3.2gbps 10 ps pp clock cycle-to-cycle jitter note 13 1p s rms total jitter note 14 10 ps pp crosstalk induced jitter note 15 0.7 ps rms (adjacent channel) t r , t f output rise/fall time 20% to 80%, v in = 800mv, full output swing 35 60 110 ps notes: 8. high frequency ac electricals are guaranteed by design and characterization. 9. output-to-output skew is measured between outputs under identical input conditions. 10. 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. 11. random jitter is measured with a k28.7 comma detect character pattern, measured at 2.5gbps to 3.2gbps. 12. deterministic jitter is measured at 2.5gbps to 3.2gbps, with both k28.5 and 2 23 ?1 prbs pattern. 13. 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. 14. 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. 15. 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 (8) single-ended and differential swings v in , v out 800mv (typ .) figure 1a. single-ended voltage swing v diff_in , v diff_out 1.6v (typ .) figure 1b. differential voltage swing downloaded from: http:///
6 precision edge ? sy58029u micrel, inc.m9999-082707 hbwhelp@micrel.com or (408) 955-1690 timing diagrams in / in q /q t pd t pd v in v ou t figure 2a. in-to-q timing diagram s el q /q t pd t pd v ou t v cc /2 v cc /2 figure 2b. sel-to-q timing diagram sel0 q: sel1 = low; in0, /in1 = low; /in0, in1 = high or: sel1 = high; in2, /in3 = low; /in2, in3 = high sel1 q: sel0 = low; in0, /in2 = low; /in0, in2 = high or: sel0 = high; in1, /in3 = low; /in1, in3 = high downloaded from: http:///
7 precision edge ? sy58029u micrel, inc.m9999-082707 hbwhelp@micrel.com or (408) 955-1690 functional characteristics v cc = 2.5v, gnd = 0, v in = 100mv, t a = 25c, unless otherwise stated. 2.5ghz output output swing (200mv/div.) time (50ps/div.) 200mhz output output swing (200mv/div.) time (600ps/div.) 1.25ghz output output swing (200mv/div.) time (100ps/div.) 5gbps output (2 23 1 prbs) time (50ps/div.) output swing (200mv/div.) 1.25gbps output (2 23 1 prbs) time (200ps/div.) output swing (200mv/div.) 3.2gbps output (2 23 ? prbs) time (100ps/div.) output swing (200mv/div.) downloaded from: http:///
8 precision edge ? sy58029u micrel, inc.m9999-082707 hbwhelp@micrel.com or (408) 955-1690 typical operating characteristics v cc = 2.5v, gnd = 0, v in = 100mv, t a = 25c, unless otherwise stated. 0 0.2 0.4 0.6 0.8 1 1.2 1.4 -40 -20 0 20 40 60 80 100 ? output-to-output skew (ps) temperature ( c) output-to-output skew vs. temperature 280 285 290 295 300 305 310 315 320 0 200 400 600 800 1000 1200 propagation delay (ps) input voltage (mv) propagation delay vs. input voltage 296 298 300 302 304 306 308 310 -60 -40 -20 0 20 40 60 80 100 propagation delay (ps) temperature ( c) propagation delay vs. temperature 0 100 200 300 400 500 600 700 800 012345678910 output amplitude (mv) frequency (ghz) output amplitude vs. frequency downloaded from: http:///
9 precision edge ? sy58029u micrel, inc.m9999-082707 hbwhelp@micrel.com or (408) 955-1690 input stage 50 ? 50 ? v cc gnd / in v t in figure 3. simplified differential input stage input interface applications pecl in /inv t sy58029 u v cc r pd r pd f or a 3.3v system, r pd = 100 ? f or a 2.5v system, r pd = 50 ? gnd gnd v ref-ac v cc 0.01 f figure 4d. lvpecl interface (ac-coupled) lvds in /inv t nc sy58029 u v cc g nd nc v ref-ac figure 4e. lvds interface cml in /inv t nc sy58029 u v cc g nd nc v ref-ac figure 4a. cml interface (dc-coupled) option: may connect v t to v cc lvpecl in /inv t sy58029 u v cc v cc nc 0.01 f r pd for a 3.3v system, r pd = 50 ? for a 2.5v system, r pd = 19 ? g nd v ref-ac figure 4c. pecl interface (dc-coupled) cml in /inv t sy58029 u v cc g nd v ref-ac v cc 0.01 f figure 4b. cml interface (ac-coupled) downloaded from: http:///
10 precision edge ? sy58029u micrel, inc.m9999-082707 hbwhelp@micrel.com or (408) 955-1690 output interface applications r282 ? r282 ? z o = 50 ? z o = 50 ? +3.3v +3.3v r1130 ? r1130 ? +3.3v figure 5a. parallel thevenin-equivalent termination z = 50 ? z = 50 ? 50 ? 50 ? 50 ? +3.3v +3.3v destination r b c10.01 f (optional) v cc figure 5b. parallel termination (three-resistor "y") note: 1. for a 2.5v system, r1 = 250y, r2 = 62.5y. for a 3.3v system, r1 = 130y, r2 = 82y. note: 1. for a 2.5v system, rb = 19y. for a 3.3v system, rb = 50y. part number fun ction data sheet link sy58028u ultra precision differential cml 4:1 mux http://www.micrel.com/product-info/products/sy58028u.shtml with 1:2 fanout and internal i/o termination sy58029u ultra precision differential lvpecl 4:1 mux http://www.micrel.com/product-info/products/sy58029u.shtml with 1:2 fanout and internal termination sy58030u ultra precision, 400mv differential lvpecl 4:1 http://www.micrel.com/product-info/products/sy58030u.shtml mux with 1:2 fanout 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 downloaded from: http:///
11 precision edge ? sy58029u micrel, inc.m9999-082707 hbwhelp@micrel.com or (408) 955-1690 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 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. ? 2005 micrel, incorporated. 32-pin micro leadframe ? (mlf-32) package ep- exposed pa d die compside islandheat 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) 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. downloaded from: http:///

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