SY75578L pcie fanout buffer 267mhz, 8 hcsl outputs with 2 input mux precisionedge? precision edge is a registered 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 december 4 , 20 13 120 4 13 - 1.1 hbwhelp@micrel.com or (408) 955 - 1690 general description the sy75578 l is a high - speed, fully differential 1:8 clock fanout buffer optimized to provide eight identical output copies with 130fs phase jitter and maximum 100ps output - to - output skew . designed to be used with pci - express applications, sy75578 l accepts hcsl/lvds and outputs hcsl logic levels. the sy75578 l operates from a 3.3v 5% power supply and i s guaranteed over the full industrial temperature range ( ? 40c to +85c). it is available in a 32 pin qfn lead - free package. the sy75578 l is part of micrels high - speed, ultra - low jitter, precisionedge? product line. datasheets and support documentation a re available on micrels web site at: www.micrel.com . features ? eight differential pairs of hcsl outputs ? two pairs of differential inputs accept lvds or hcsl logic levels ? 267mhz max frequency ? ultra low phase jitter: ? 130 fs rms , 200mhz ( 12khz C 20mhz) ? <10 0ps o utput - to - output skew ? 3.3v 5% power supply operation ? ? 40c to +85c industrial operating temperature ? available in 32 - pin qfn lead - free package applications ? blade servers ? desktop servers ? workstations ? storage area networks ? ip routers and switches ? telecom and datacom ? high performance computing functional block diagram
micrel, inc. SY75578L december 4 , 20 13 2 120 4 13 - 1.1 hbwhelp@micrel.com or (408) 955 - 1690 ordering information ( 1 ) part number package type operating range package marking lead finish SY75578Lmg qfn - 3 2 industrial sy75578 l with pb - free bar - line indicator nipdau SY75578Lmg tr ( 2 ) qfn - 32 industrial sy75578 l with pb - free bar - line indicator nipdau note s : 1. contact factory for die availability. dice are guaranteed at t a = 25c, dc electricals only. 2. tape and reel. pin configuration 32 - pin qfn
micrel, inc. SY75578L december 4 , 20 13 3 120 4 13 - 1.1 hbwhelp@micrel.com or (408) 955 - 1690 pin description pin number pin name pin function 7 sel single - ended input: this single - ended ttl/cmos compatible input selects the inputs to the m ultiplexer. note that this input is internally connected to a pull - up resistor and will default to logic high state if left open. sel = 1 propagates in0, /in0 to outputs. sel= 0 propagates in1, /in1 to outputs. 4 vddin positive power supply: 3.3v power supply. bypass with 0.1f||0.01f low esr capacitors as close to the v ddin pin as possible. 2, 3 5, 6 in0, /in0 in1, /in1 hcsl /lvds differential input pairs: t hese input pairs accept hcsl or lvds differential signal inputs . 1 /pd pd = 0 powers down the chip and tri - states outputs. pin is attached to an internal pull - up resistor. 9 oe single - ended input: this ttl/cmos input disables and enables the q0 - q7 outputs . oe is a synchronous . high = enable outputs, low = tri - state outputs. internal pull - up resistor makes outputs enabled by default. 20, 21 , 32 gnd, e xposed pad ground : exposed pad must be connected to a ground plane that is the same potential as the ground pins 8 iref external resistor between pin iref and gnd controls reference current. 11, 10 14, 13 16, 15 19, 18 23, 22 26, 25 28, 27 31, 30 q7, /q7 q6, /q6 q5, /q5 q4, /q4 q3, /q3 q2, /q2 q1, /q1 q0, /q0 hcsl differential output pairs: differential buffered output copies of the selected input signal. these differential outputs are a logic function of the i n0, in1, and sel inputs. 12, 17, 24, 29 vdd positive power supply: 3.3v power supply. bypass with 0.1f| |0.01f low esr capacitors as close to the v dd pin s as possible.
micrel, inc. SY75578L december 4 , 20 13 4 120 4 13 - 1.1 hbwhelp@micrel.com or (408) 955 - 1690 absolute maximum ratings ( 3 ) supply voltage (v dd, v ddin ) ................................ ........ 5.5v input voltage (v in ) ............................ C 0.5v to v ddin + 0.5v lead temperature (soldering, 20s) .......................... 260c maximum junction temperature .............................. 125 c storage temperature (t s ) ........................ C 65c to +150 c esd protection (input) ................................ .... 2000v min. operating ratings ( 4 ) supply voltage (v dd, v ddin ) ..................... 3.135v to 3.465v ambient op temperature (t a ) .................. ? 40c to +85c package thermal resistance ( 5 ) qfn - 32 still - air ( ? ja ) ................................ ............. 50 c/w junction - to - board ( ? jb ) ............................. 20 c/w electrical characteristics ( 5 ) v dd = v ddin = 3.135v to 3.465v, t a = ? 40c to +85c, unless otherwise stated. rref = 475 symbol parameter condition min. typ. max. units v dd, v ddin power supply voltage range 3.135 3.3 3.465 v r out output resistance 3 k pull up pull up resistance sel, /pd, oe 110 k ih input high voltage sel, /pd, oe 2 v ddin + 0.3 v v il input low voltage sel, /pd, oe ? ih input high voltage hcsl, in, /in 660 750 850 m v v il input low voltage ? in input voltage swing lvds, in, /in 250 350 4 5 0 mv v input offset input common mode voltage lvds, in, /in, 1.125 1.25 1.375 v v oh output high voltage h cs l 660 750 850 mv v ol output low voltage h cs l ? ( 7 , 8 ) crossing point v oltage absolute 250 350 550 mv vcross_variation ( 7 , 8 , 9 ) variation of crossing point voltage variation over all edges 140 mv i dd power supply current for v dd + v ddin load 50 il ( 10 ) input leakage current 0 < v in < v ddin ? notes: 3. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional opera tion is not implied at conditions other than those detailed in the operational sections of this datasheet. exposure to absolute maximum ratings c onditions for extended periods may affect device reliability. 4. the datasheet limits are not guaranteed if the device is operated beyond the operating ratings. 5. package thermal resistance assumes that the exposed pad is soldered (or equivalent) to the device's most negative potential on the pcb. ? jb and ? ja values are determined for a 4 - layer bo ard in still - air u nless otherwi se stated. the circuit is designed to meet the dc specifications shown in the above table after thermal equilibrium has been established. 6. the circuit is designed to meet the dc specifications shown in the above table after thermal equilibrium has been esta blished. 7. test setup is r l = 50 with 2pf, rr = 475 1%. 8. measurement taken from q and /q . 9. measured at the crossing point where instantaneous voltages of q and / q are equal. 10. inputs with pull - up/pull - down resistances are not included.
micrel, inc. SY75578L december 4 , 20 13 5 120 4 13 - 1.1 hbwhelp@micrel.com or (408) 955 - 1690 ac electrical characteristics ( 6 ) v dd = v ddin = 3.135v to 3.465v, t a = ? 40c to +85c, unless otherwise stated. symbol parameter condition min. typ. max. units f max maximum frequency 267 mhz t pd propagation delay note 11 2 3 ns t skew output - to - output skew notes 12 , 13 100 ps t r , t f output rise/fall times 0.175v to 0.52 5 v / 0.52 5 v to 0.175v at full output swing. 50 rj_jitter phase jitter at 200mhz 130 fs rms at 156.25mhz 150 fs rms at 100mhz 200 fs rms t oe_enable output enable time all outputs 2 s t oe_disable output disable time all outputs 10 ns t dcy duty cycle 45 50 55 % notes: 11. measured from the differential input crossing point to the differential output crossing point. 12. output - to - output skew is the difference in time between outputs, receiving data from the same input, for the same temperature, voltage, and transition. 13. this parameter is defined in accordance with jedec standard 65 .
micrel, inc. SY75578L december 4 , 20 13 6 120 4 13 - 1.1 hbwhelp@micrel.com or (408) 955 - 1690 phase noise plots phase jitter = 132 f s rms , 200mhz carrier frequency ; integration range: 12khz C 20mhz
micrel, inc. SY75578L december 4 , 20 13 7 120 4 13 - 1.1 hbwhelp@micrel.com or (408) 955 - 1690 phase jitter = 145 fs rms , 156.25 mhz carrier frequency ; integration range: 12khz C 20mh z
micrel, inc. SY75578L december 4 , 20 13 8 120 4 13 - 1.1 hbwhelp@micrel.com or (408) 955 - 1690 phase jitter = 204 fs rms , 1 00mhz carrier frequency ; integration range: 12khz C 20mhz
micrel, inc. SY75578L december 4 , 20 13 9 120 4 13 - 1.1 hbwhelp@micrel.com or (408) 955 - 1690 functional characteristics hcsl waveform diagram hcsl interface application pci - express device routing
micrel, inc. SY75578L december 4 , 20 13 10 120 4 13 - 1.1 hbwhelp@micrel.com or (408) 955 - 1690 package information ( 14 ) 32 - pin qfn note: 14. package information is correct as of the publication date. for updates and most current information, go to www.micrel.com . 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 warran ties with respect to the 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 its use. micrel reserves the right to change circuitry, specifi cations and descriptions at any time without notice. no license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. except as provided in micrels terms and conditions of sale for 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 i njury 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 a nd purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 20 13 micrel, incorporated.
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