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sy898530u 500mhz 1:16 3.3v-to-2.5/3.3v lvpecl fanout buffer precision edge is a register ed trademark of micrel, inc. micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 ( 408 ) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com november 2011 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 general description the sy898530u is a 1:16 fanout buffer which can accept most standard differential logic levels and outputs the signal as a differential 2.5v or 3.3v lvpecl signal. the part can amplify input signals as small as 150mvpp to the full lvpecl output swing. the sy898530u is well suited for clock distribution applicat ions which demand versatility and low-skew performance. it is pin-to-pin compatible with idt?s ics8530 fanout buffer. the sy898530u operates from a 3.3v 5% core power supply and a 2.5v 5% or a 3.3v 5% output supply. the sy898530u is guaranteed over the full commercial temperature range (0c to +70c). it is available in a 48- pin tqfp lead-free package. data sheets and support documentation can be found on micrel?s web site at www.micrel.com . functional block diagram features ? 16 differential 2.5v/3.3v lvpecl outputs ? differential clk inputs. accepts lvds, lvpecl, lvhstl, sstl, hcsl logic levels ? translates any single-ended input signal to 2.5/3.3v lvpecl levels with a resistor bias on /clk input ? 500mhz maximum output frequency ? <50ps output skew ? <250ps part-to-part skew ? <2ns propagation delay ? 3.3v core, 2.5/3.3v output operating supply ? 0c to +70c operating temperature ? available in 48-pin tqfp package ? pin-to-pin compatible with ics8530 applications ? data distribution ? high-performance pcs ? communications ? parallel processor-based systems
micrel, inc. sy898530u november 2011 2 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 ordering information (1) part number package type operating range package marking lead finish sy898530utz tqfp-48 commercial sy898530utz with pb-free bar-line indicator matte-sn SY898530UTZTR (2) tqfp-48 commercial sy898530utz with pb-free bar-line indicator matte-sn sy898530utztx (2, 3) tqfp-48 commercial sy898530utz with pb-free bar-line indicator matte-sn notes: 1. contact factory for die availability. dice are guaranteed at t a = 25c, dc electricals only. 2. tape and reel. 3. eia specification orientation. pin configuration 48-pin tqfp (tqfp-48)
micrel, inc. sy898530u november 2011 3 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 pin description pin number pin name pin function 36, 37 clk, /clk differential clock inputs. accepts lvds, l vpecl, lvhstl, sstl, hcsl logic levels. clk is internally connected to a pull-down resi stor, /clk is internally connected to a pull- up resistor. see ?pin characteristics? for typical values. 33, 34 31, 32 28, 29 26, 27 22, 23 20, 21 17, 18 15, 16 9, 10 7, 8 4, 5 2, 3 46, 47 44, 45 41, 42 39, 40 q0, /q0 q1, /q1 q2, /q2 q3, /q3 q4, /q4 q5, /q5 q6, /q6 q7, /q7 q8, /q8 q9, /q9 q10, /q10 q11, /q11 q12, /q12 q13, /q13 q14, /q14 q15, /q15 lvpecl differential output pair s. differential buffered copi es of the input signal. the output swing is typically 740mv. see interfac e applications for termination information. 1, 11, 14, 24, 25, 35, 38, 48 vcco output power supply: bypass with 0.1f//0.01f low esr capacitors as close to the v cco pins as possible. supplies the output buffers. 12, 13 vcc core power supply: bypass with 0.1f//0.01f low esr capacitors as close to the v cc pins as possible. supplies input and core circuitry. 6, 19, 30, 43 vee ground pin characteristics symbol description min. typ. max. units c in input capacitance 4 pf r pullup input pull up resistor 50 k ? r pulldown input pull down resistor 30 k ? clock input function table inputs outputs clk /clk qx /qx input to output mode polarity 0 1 low high differential to differential non-inverting 1 0 high low differential to differential non-inverting 0 biased (1) low high single-ended to differential non-inverting 1 biased (1) high low single-ended to differential non-inverting biased (1) 0 high low single-ended to differential inverting biased (1) 1 low high single-ended to differential inverting note: 1. refer to interface applicat ions for single-ended interfaces.
micrel, inc. sy898530u november 2011 4 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 absolute maximum ratings (1) supply voltage (v cc )................................................4.6v input voltage (v in ) ............................?0.5v to v cc + 0.5v lvpecl output current (i out ) continuous.......................................................50ma surge .............................................................100ma lead temperature (solde ring, 20sec .).................. 260c storage temperature (t s ) ....................?65c to +150c operating ratings (2) supply voltage (v cc ) ......................... 3.135v to 3.465v output supply voltage (v cco )............ 2.375v to 3.465v ambient temperature (t a )........................0c to +70c package thermal resistance (3) tqfp still-air ( ? ja ) .........................................48c/w junction-to-case ( ? jc ).........................13c/w dc electrical characteristics (6) v cc = 3.135v to 3.465v, v cco = 2.375v to 3.465v, t a = 0c to +70c, unless otherwise stated. symbol parameter condition min. typ. max. units v cc power supply voltage range 3.135 3.3 3.465 v v cco output power supply 2.375 3.465 v i ee power supply current max. v cc, v cco 125 ma clk 150 ua i ih input high current /clk v cc = v in = 3.465v 5 ua clk ? 5 ua i il input low current /clk v cc = 3.465v , v in = 0.5v ? 150 ua v pp peak-to-peak input swing 0.15 1.3 v v cmr common mode input voltage note 4, 5 0.5 v cc ? 0.85 v pecl outputs dc electrical characteristics (6) v cc = 3.135v to 3.465v, v cco = 2.375v to 3.465v, t a = 0c to +70c, outputs terminated with 50 ? to v cco -2v unless otherwise stated. symbol parameter condition min. typ. max. units v oh output high voltage v cco ? 1.1 v cco ? 0.7 v v ol output low voltage v cco ? 2.0 v cco ? 1.4 v v out output voltage swing 0.55 0.93 v notes: 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional ope ration is not implied at conditions other than those detailed in the operational sections of this data shee t. exposure to absolute maximum ratings co nditions for extended periods may affect device reliability. 2. the data sheet limits are not guaranteed if t he device is operated beyond the operating ratings. 3. ? ja and ? jc values are determined for a 4-layer board in still-air. 4. for single-ended applications, the maxi mum input voltage for clk, /clk is v cc +0.3v. 5. common mode voltage is defined as v ih . 6. the circuit is designed to meet the dc specifications shown in the above table after thermal equilibrium has been establishe d.
micrel, inc. sy898530u november 2011 5 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 ac electrical characteristics v cc = 3.135v to 3.465v, v cco = 2.375v to 3.465v, t a = 0c to +70c, unless otherwise stated. symbol parameter condition min. typ. max. units f max maximum frequency 500 mhz t pd propagation delay note 7 1 2 ns output-to-output skew note 8, 10 26 50 ps t skew part-to-part skew notes 9, 10 250 ps t jitter integration range = 12khz ? 20mhz output = 500mhz 127 fs rms t r , t f output rise/fall times (20% to 80%) at full output swing. 300 700 ps duty cycle 47 50 53 % notes: 7. measured from the differential input crossing point to the differential output crossing point. 8. output-to-output skew is the difference in time between output s, receiving data from the same input, for the same temperatur e, voltage and transition. 9. part-to-part skew is defined for two parts with identical pow er supply voltages at the same temperature and no skew at the e dges at the respective inputs. 10. this parameter is defined in accordance with jedec standard 65.
micrel, inc. sy898530u november 2011 6 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 phase noise graph phase noise plot: 500mhz @ 3.3v
micrel, inc. sy898530u november 2011 7 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 test circuit differential input level output duty cycle propagation delay output rise/fall times output-to-output skew part-to-part skew
micrel, inc. sy898530u november 2011 8 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 typical characteristics v cc = 3.3v, v cco = 2.5v or 3.3v, t a = 25c, input signal = 800mv
micrel, inc. sy898530u november 2011 9 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 junction temperature the maximum recommended junction temperature is t j =125c. the outputs are terminated with 50 ohms to vcco - 2v. below is a calculation of the worst case scenario with zero airflow: t j = junction temperature t a = ambient temperature ja = junction-to-ambient thermal resistance p d = power dissipation p d = p d_core + p d_outputs p d_core = v cc_max * i ee_max p d_core = 3.465v * 125ma = 433mw p d_output = pd_h + pd_l p d_h = [(v oh ? (v cco ? 2v))/r l ] * (v cco - v oh_max ) p d_h = [(2v ? 0.7v)/50 ? ] * 0.7v p d_h = 18.2mw p d_l = [(v ol ? (v cco ? 2v))/r l ] * (v cco - v ol_max ) p d_l = [(2v ? 1.4v)/50 ? ] * 1.4v p d_l = 16.8mw p d_output = 35mw p d_outputs = 16 * 35mw p d_outputs = 560mw p d = 433mw + 560mw p d = 0.993 w t j = t a + ja * p d t j_worst_case = 70c + 0.993w * 48c/w t j_worst_case = 118 c in still air. the worst case junction temperature is below 125 c.
micrel, inc. sy898530u november 2011 10 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 output interface applications figure 1. parallel termination-thevenin equivalent notes: 1. for +2.5v systems: r1 = 250 ? , r2 = 82.5 ? . figure 2. three-resistor ?y-termination? notes: 1. power-saving alternatives to thevenin termination. 2. place termination resistors as cl ose to destination inputs as possible. 3. for +2.5v systems, r b = 19 ? . r b resistor sets the dc bias voltage, equal to v t . figure 3. terminating unused i/o notes: 1. unused output (/q) must be terminated to balance the output. 2. for 2.5v systems: r1 = 250 ? , r2 = 62.5 ? , r3 = 1.25k ? , r4 = 1.2k ? .
micrel, inc. sy898530u november 2011 11 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 input interface applications figure 4. clk and /clk input driven by 1.8v lvhstl figure 5. clk and /clk input driven by 3.3v lvds driver figure 6. clk and /clk input driven by 3.3v lvpecl driver with ac couple notes: 1. for +2.5v systems: r5 = 50 ? . r1 & r2 = 220 ? , r3 & r4 = 68 ? .
micrel, inc. sy898530u november 2011 12 m9999-111011-c hbwhelp@micrel.com or (408) 955-1690 package information 48-pin tqfp (tqfp-48) 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 micrel makes no representations or warranties with respect to t he accuracy or completeness of the information furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for it s use. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether expre ss, implied, arising by estoppel or other wise, to any intellectual property rights is granted by this document. except as provided in micrel?s 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 products including l iability or warranties relating to fitness for a particular purpose, merchantability, or infringement of an y patent, copyright or other intellectual p roperty right. micrel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a product can reasonably be expected to result in pers onal injury. life support devices or system s are devices or systems 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 significan t injury to the user. a purchaser?s use or sale of micrel produc ts for use in life support app liances, devices or systems is a purchaser?s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2011 micrel, incorporated.

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