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1 precision edge? SY58034U micrel, inc. m9999-020707 hbwhelp@micrel.com or (408) 955-1690 description provides six ultra-low skew copies of the selected input 2:1 mux input included for clock switchover applications guaranteed ac performance over temperature and voltage: ? clock frequency range: dc to > 6ghz ? <290ps in-to-out t pd ? <60ps t r /t f times ? <20ps skew (output-to-output) unique input isolation design minimizes crosstalk ultra low-jitter design: ? <1ps rms random jitter ? <10ps pp total jitter (clock) ? <1ps rms cycle-to-cycle jitter ? <0.7ps rms crosstalk-induced jitter low supply voltage operation: 2.5v and 3.3v unique input termination and vt pin accepts dc- coupled and ac-coupled inputs (cml, pecl, lvds) internal 50 ? output source termination 400mv cml output swing C40 c to +85 c temperature range available in 32-pin (5mm 5mm) mlf ? package features 6ghz, 1:6 cml fanout buffer with 2:1 mux input and internal i/o termination precision edge ? SY58034U applications redundant clock distribution all sonet/sdh clock distribution all fibre channel distribution all gigabit ethernet clock distribution the SY58034U is a 2.5v/3.3v precision, high-speed 1:6 fanout buffer capable of handling clocks up to 6ghz. a differential 2:1 mux input is included for redundant clock switchover applications. the differential input includes micrels unique, 3-pin input termination architecture that allows the device to interface to any differential signal (ac- or dc-coupled) as small as 100mv without any level shifting or termination resistor networks in the signal path. the outputs are 50 ? source terminated cml, with extremely fast rise/fall times guaranteed to be less than 60ps. the SY58034U operates from a 2.5v 5% supply or a 3.3v 10% supply and is guaranteed over the full industrial temperature range of C40 c to +85 c. for applications that require lvpecl outputs, consider the sy58035u or sy58036u multiplexers. the SY58034U is part of micrels high-speed, precision edge ? product line. all support documentation can be found on micrels web site at www.micrel.com. functional block diagram precision edge is a registered trademark of micrel, inc. micro leadframe and mlf are registered trademarks of amkor technology, inc. precision edge ? q0 /q0 q1 /q1 q2 /q2 q3 /q3 q4 /q4 q5 /q5 in0 /in0 v t0 50 ? 50 ? in1 /in1 v t1 50 ? 50 ? 0 1 mux sel (ttl/cmos) s v ref-ac0 v ref-ac1 2:1 mux 1:6 fanout rev.: d amendment: /0 issue date: february 2007
2 precision edge? SY58034U micrel, inc. m9999-020707 hbwhelp@micrel.com or (408) 955-1690 package/ordering information ordering information (1) package operating package lead part number type range marking finish SY58034Umi mlf-32 industrial SY58034U sn-pb SY58034Umitr (2) mlf-32 industrial SY58034U sn-pb SY58034Umg (3) mlf-32 industrial SY58034U with nipdau pb-free bar-line indicator pb-free SY58034Umgtr (2, 3) mlf-32 industrial SY58034U with nipdau pb-free bar-line indicator pb-free 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. pin number pin name pin function 1, 4 in0, /in0 differential input: these input pairs are the differential signal inputs to the device. these 5, 8 in1, /in1 inputs accept ac- or dc-coupled signals as small as 100mv. each pin of a pair internally terminates to a vt pin through 50 ? . note that these inputs will default to an indeterminate state if left open. please refer to the input interface applications section for more details. 2, 6 vt0, vt1 input termination center-tap: each side of the differential input pair terminates to a vt pin. the vt0 and vt1 pins provide a center-tap to a termination network for maximum interface flexibility. see input interface applications section for more details. 31 sel this single-ended ttl/cmos-compatible input selects the inputs to the multiplexer. note that this input is internally connected to a 25k ? pull-up resistor and will default to a logic high state if left open. the mux select switchover function is asynchronous. 10 nc no connect. 11, 16, 18, vcc positive power supply: bypass with 0.1 f ?? 0.01 f low esr capacitors and place as 23, 25, 30 close to the vcc pins as possible. 29, 28 q0, /q0, differential outputs: these cml output pairs are low skew output copies of the selected 27, 26 q1, /q1, input. the output stage is optimized to deliver a 400mv swing (single-ended) into 50 ? . 22, 21 q2, /q2, each output includes a 50 ? source-termination resistor, thus minimizing any return 20, 19 q3, /q3, reflections. unused output pins may be left floating. please refer to the truth table 15, 14 q4, /q4, for details. 13, 12 q5, /q5 9, 17, 24, 32 gnd, ground. ground pin and exposed pad must be connected to the same ground plane. exposed pad 3, 7 vref-ac0, reference voltage: these output biases to v cc C1.2v. it is used for ac-coupling inputs vref-ac1 (in, /in). connect v ref-ac directly to the vt pin. bypass with 0.01 f low esr capacitor to v cc . see input interface applications section. maximum sink/source current is 1.5ma. due to the limited capability, the vref-ac pin is only intended to drive its respective vt pin. pin description 24 23 22 21 20 19 18 17 gnd vcc q2 /q2 q3 /q3 vcc gnd in0 vt0 vref-ac0 /in0 in1 vt1 vref-ac1 /in1 1 2 3 4 5 6 7 8 910111213141516 32 31 30 29 28 27 26 25 /q0 q0 vcc sel gnd q1 /q1 vcc q5 /q5 vcc nc gnd /q4 q4 vcc 32-pin mlf ? (mlf-32) truth table sel 0 in0 input selected 1 in1 input selected
3 precision edge? SY58034U micrel, inc. m9999-020707 hbwhelp@micrel.com or (408) 955-1690 absolute maximum ratings (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 termination current source or sink current on vt pin ........................ 100ma input current source or sink current on in, /in pin .................... 50ma source or sink current on vref-ac pin ................ 2ma lead temperature (soldering, 20 sec.) ..................... 260 c storage temperature range (t s ) ........... C65 c to +150 c operating ratings (2) power supply voltage (v cc ) ............... +2.375v to +2.625v ............................................................ +3.0v to +3.6v ambient temperature range (t a ) ............. C40 c to +85 c package thermal resistance (3) mlf ? ( ja ) still-air ............................................................. 35 c/w mlf ? ( jb ) junction-to-board ............................................ 16 c/w symbol parameter condition min typ max units v cc power supply voltage 2.375 2.5 2.625 v 3.0 3.3 3.6 v i cc power supply current no load, max. v cc 245 320 ma r diff_in differential input resistance 90 100 110 ? |inC/in| r in input resistance (in-to-vt) 45 50 55 ? v ih input high voltage (in, /in) v cc C1.2 v cc v v il input low voltage (in, /in) 0 v ih C0.1 v v in input voltage swing (in, /in) see figure 1a. 0.1 1.7 v v diff_in differential input voltage swing see figure 1b. 0.2 v |in, /in| v t in in to v t (in, /in) 1.28 v v ref-ac reference voltage v cc C1.3 v cc C1.2 v cc C1.1 v notes: 1. permanent device damage may occur if the measurements 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 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 on the pcb. jb and ja are determined for a 4-layer board in a still air, unless otherwise stated. 4. the circuit is designed to meet the dc specifications shown in the above table after thermal equilibrium has been established . dc electrical characteristics (4) t a = C40 c to 85 c, unless otherwise stated.
4 precision edge? SY58034U micrel, inc. m9999-020707 hbwhelp@micrel.com or (408) 955-1690 v cc = 2.5v 5% or 3.3v 10%; t a = -40 c to 85 c; r l = 100 ? across each output pair or equivalent, unless otherwise stated. symbol parameter condition min typ max units v oh output high voltage r l = 50 ? to v cc v cc C0.020 v cc v v out output voltage swing see figure 1a. 325 400 mv v diff_out differential output voltage swing see figure 1b. 650 800 mv r out output source impedance 40 50 60 ? cml output dc electrical characteristics (6) v cc = 2.5v 5% or 3.3v 10%; t a = -40 c to 85 c, unless otherwise stated. symbol parameter condition min typ max units v ih input high voltage 2.0 v v il input low voltage 0.8 v i ih input high current C125 40 a i il input low current C300 a note: 6. 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 (6)
5 precision edge? SY58034U micrel, inc. m9999-020707 hbwhelp@micrel.com or (408) 955-1690 v cc = 2.5v 5% or 3.3v 10%; t a = C40 c to 85 c, r l = 100 ? across each output pair, or equivalent, unless otherwise stated. symbol parameter condition min typ max units f max maximum operating frequency clock v out 200mv 6 7.5 ghz t pd differential propagation delay (in0 or in1-to-q) 140 220 290 ps (sel-to-q) 100 200 400 ps ? t pd tempco differential propagation delay 65 fs/ c temperature coefficient t skew output-to-output note 8 20 ps part-to-part note 9 100 ps t jitter clock cycle-to-cycle jitter note 10 1ps rms random jitter (rj) note 11 1ps rms total jitter (tj) note 12 10 ps pp adjacent channel note 13 crosstalk-induced jitter 0.7 ps rms t r , t f output rise/fall time full swing, 20% to 80% 20 60 ps notes: 7. high frequency ac electricals are guaranteed by design and characterization. 8. output-to-output skew is measured between outputs under identical transitions. 9. part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and with no skew of t he edges at the respective inputs. 10. cycle-to-cycle jitter definition: the variation of periods between adjacent cycles, t n Ct nC1 where t is the time between rising edges of the output signal. 11. random jitter is measured with a k28.7 pattern, measured at 2.5gbps. 12. 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. 13. 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 (7) single-ended and differential swings v in , v out 400mv (typ.) figure 1a. single-ended voltage swing v diff_in , v diff_out 800mv (typ.) figure 1b. differential voltage swing
6 precision edge? SY58034U micrel, inc. m9999-020707 hbwhelp@micrel.com or (408) 955-1690 timing diagrams in /in q input-to-q t pd sel-to-q t pd /q t pd sel q /q t pd t pd v cc /2 v cc /2
7 precision edge? SY58034U micrel, inc. m9999-020707 hbwhelp@micrel.com or (408) 955-1690 typical operating characteristics v cc = 2.5v, gnd = 0, v in = 100mv, r l = 100 ? across the output; t a = 25 c, unless otherwise stated. 0 50 100 150 200 250 300 350 400 450 500 0 2000 4000 6000 8000 10000 output swing (mv) frequency (mhz) output swing vs. frequenc y 214 216 218 220 222 224 -40 -20 0 20 40 60 80 100 propagation delay (ps) temperature (c) propagation delay vs. temperature
8 precision edge? SY58034U micrel, inc. m9999-020707 hbwhelp@micrel.com or (408) 955-1690 functional characteristics 200mhz output time (600ps/div.) output swing (100mv/div.) 2.5ghz output time (50ps/div.) output swing (100mv/div.) 5ghz output time (30ps/div.) output swing (100mv/div.) 7ghz output time (20ps/div.) output swing (100mv/div.) v cc = 2.5v, gnd = 0, v in = 400mv, r l = 100 ? across the output; t a = 25 c, unless otherwise stated.
9 precision edge? SY58034U micrel, inc. m9999-020707 hbwhelp@micrel.com or (408) 955-1690 input and output stages 50 ? 50 ? v cc gnd /in v t in figure 2a. simplified differential input stage 50 ? 50 ? v cc gnd q /q figure 2b. simplified cml output stage input interface applications v cc 0.01 f l vpecl in /in SY58034U v cc r pd r pd for 3.3v, r pd = 100 ? for 2.5v, r pd = 50 ? gnd gnd vt vref-ac figure 3d. lvpecl interface (ac-coupled) l vds in /in SY58034U v cc gnd vt nc vref-ac nc figure 3e. lvds interface cml in /in vt nc SY58034U v cc vref-ac nc gnd option: may connect v t to v cc . figure 3a. cml interface (dc-coupled) cml in /in SY58034U v cc v cc 0.01 f gnd vt vref-ac figure 3b. cml interface (ac-coupled) lvp ecl in /in vt SY58034U v cc v cc 0.01 f r pd for 3.3v, r pd = 50 ? . for 3.5v, r pd = 19 ? . gnd vref-ac nc figure 3c. lvpecl interface (dc-coupled)
10 precision edge? SY58034U micrel, inc. m9999-020707 hbwhelp@micrel.com or (408) 955-1690 part number function data sheet link sy58035u 4.5ghz, 1:6 lvpecl fanout buffer with 2:1 http://www.micrel.com/product-info/products/sy58035u.shtml mux input and internal termination sy58036u 6ghz, 1:6 400mv lvpecl fanout buffer with 2:1 http://www.micrel.com/product-info/products/sy58036u.shtml mux input 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 output interface applications 50 ? 50 ? v cc gnd q /q 100 ? 16ma figure 4. cml dc-coupled termination 50 ? 50 ? v cc gnd q /q 50 ? 50 ? dc bias point per application 16ma figure 5. cml ac-coupled termination
11 precision edge? SY58034U micrel, inc. m9999-020707 hbwhelp@micrel.com or (408) 955-1690 32-pin micro leadframe ? (mlf-32) pa c kage ep- exposed pad die compside island heat 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) 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 a ssumed 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 purchasers use or sale of micrel products for use in life support appliances, devices or systems is at purchasers own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2005 micrel, incorporated. 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.

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