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sy56011r low voltage 1.2v/1.8v/2.5v cml 1:2 fanout buffer 6.4gbps with equalization preliminary precision edge is a registered trademark of micrel, inc. qfn and micro leadframe are registered trademarks of amkor technology. micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 (408) 944 - 0800 ? fax + 1 (408) 474 - 1000 ? http://www.micrel.com july 2008 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 general description the sy56011r is a fully differential, low voltage 1.2v/1.8v/2.5v cml 1:2 fanout buffer with input equalization. the sy56011r can process clock signals as fast as 4.5 ghz or data patterns up to 6.4gbps. the differential input includes micrel?s unique, 3 - pin input termination architecture that interfaces to cml differential signals, without any level - shifting or termination resistor networks in the signal path. the differential input can also accept ac - coupled lvpecl and lvds signals. input voltages as small as 200mv (400mv pp ) are applied before the 9?, 18? or 27? fr4 transmission line. for ac - coupled input interface applications, an internal voltage reference is provided to bias the v t pin. the outputs are cml, with extremely fast ris e/fall times guaranteed to be less than 80ps. the sy56011r operates from a 2.5v 5% core supply and a 1.2v, 1.8v or 2.5v 5% output supply and is guaranteed over the full industrial temperature range ( ? 40c to +85c). the sy56011r is part of micrel?s high - speed, precision edge ? product line. datasheets and support documentation can be found on micrel?s web site at: www.micrel.com . functional block diagram precision edge ? features ? 1.2v/1.8v /2.5v cml 1:2 fanout buffer ? equalizes 9, 18, 27 inches of fr4 ? guaranteed ac performance over temperature and voltage: ? dc- to > 6.4gbps data throughput ? dc- to > 4.5ghz clock throughput ? <280 ps propagation delay (in - to - q) ? <15ps within - device skew ? <80ps rise/fall times ? ultra - low jitter design ? <1ps rms random jitter ? high - speed cml outputs ? 2.5v 5% v cc , 1.2/1.8v/2.5v 5% v cco power supply operation ? industrial temperature range: ? 40c to +85c ? available in 16 - pin (3mm x 3mm) qfn package applicatio ns ? data distribution: ? sonet clock and data distribution ? fiber channel clock and data distribution ? gigabit ethernet clock and data distribution markets ? storage ? ate ? test and measurement ? enterprise networking equipment ? high - end servers ? metro area network equi pment
micrel, inc. sy56011r july 2008 2 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 ordering information (1) part number package type operating range package marking lead finish SY56011RMG qfn -16 industrial r011 with pb - free bar - line indicator nipdau pb - free SY56011RMGtr (2) qfn -16 industrial r011 with pb - free bar - line indicator ni pdau pb - free notes: 1. contact factory for die availability. dice are guaranteed at t a = 25c, dc electricals only. 2. tape and reel. pin configuration 16- pin qfn truth table eq equalization fr4 6mil stripline low 9? float 18? high 27?
micrel, inc. sy56011r july 2008 3 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 pi n description pin number pin name pin function 1,2 in, /in differential input: signals as small as 200mv v pk (400mv pp ) applied to the input of 9, 18 or 27 inches 6mil fr4 stripline transmission line are then terminated with this differential input. eac h input pin internally terminates with 50 ? to the vt pin. 3 vt input termination center - tap: each side of the differential input pair terminates to vt pin. this pin provides a center - tap to a termination network for maximum interface flexibility. an i nternal high impedance resistor divider biases vt to allow input ac - coupling. for ac - coupling, bypass vt with 0.1f low esr capacitor to v cc . see ?interface applications? subsection and figure 2a. 6 eq three level input for equalization control. high, float, low. 7 vcc positive 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. 8,13 vcco output supply: bypass with 0.1f//0.01f low esr capacitors as close to the v cco pin s as possible. supplies the output buffers. 14 gnd, exposed pad ground: exposed pad must be connected to a ground plane that is the same potential as the ground pins. 12,11 10,9 q0, /q0 q1, /q1 cml differential output pairs: differential buffere d copy of the input signal. the output swing is typically 390mv. see ?interface applications? subsection for termination information. 4,5,15,16 nc no connect pins
micrel, inc. sy56011r july 2008 4 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 absolute maximum ratings (1) supply voltage (v cc ) ............................... ? 0.5v to +3.0v supply voltage (v cco ) ............................. ? 0 .5v to +3.0v v cc - v cco ............................................................... <1.8v v cco - v cc ............................................................... <0.5v input voltage (v in ) ....................................... ? 0.5v to v cc cml output voltage (v out ) ......................... 0.6v to 3.0v current (v t ) source or sink on vt pin ............................. 100ma input current source or sink current on (in, /in) ................ 50ma maximum operating junction tempera ture .......... 125c lead temperature (soldering, 20sec.) .................. 260c storage temperature (t s ) .................... ? 65c to +150c operating ratings (2) supply voltage (v cc ) .......................... 2.375v to 2.625v (v cco ) .......................... 1.14v to 2.625v ambient temperature (t a ) ................... ? 40c to +85c pa ckage thermal resistance (3) qfn still - air ( ja ) .................................................. 75c/w junction - to - board ( jb ) ................................ 33 c/w dc electrical characteristics (4) t a = ? 40c to +85c, unless otherwise stated. symbol parameter condition min typ max units v cc power supply voltage range v cc v cco v cco v cco 2.375 1.14 1.7 2.375 2.5 1.2 1.8 2.5 2.625 1.26 1.9 2.625 v v v v i cc power supply current max. v cc 54 75 ma i cco power supply current no load. v cco 32 42 ma r in input resistance (in -to -v t , /in -to -v t ) 45 50 55 ? r diff_in differential in put resistance (in -to - /in) 90 100 110 ? v ih input high voltage (in, /in) in, /in 1.42 v cc v v il input low voltage (in, /in) in, /in 1.22v = 1.7 - 0.475 1.22 v ih ? 0.2 v v in input voltage swing (in, /in) see figure 3a, note 5, applied to input of transmis sion line. 0.2 1.0 v v diff_in differential input voltage swing (|in - /in|) see figure 3b, note 5, applied to input of transmission line. 0.4 2.0 v v t_in voltage from input to v t 1.28 v notes: 1. permanent device damage may occur if absolute maximu m ratings 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 a ffect device reliability. 2. the data sheet limits are not guaranteed if the device is operated beyond the operating ratings. 3. package thermal resistance assumes 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 board in still - air number, unless otherwise stated. 4. the circuit is designed to meet the dc specifications shown in the above table after thermal equilibrium has been established . 5. v ih (max) is specified when v t is floating.
micrel, inc. sy56011r july 2008 5 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 cml outputs dc electrical characteristics (6) v cco = 1.14v to 1.26v r l = 50 ? to v cco, v cco = 1.7v to 1.9v, 2.375v to 2.625v, r l = 50 ? to v cco or 100 ? across the outputs. v cc = 2.375v to 2.625v; t a = ? 40c to +85c, unless otherwise stated. symbol parameter condition min typ max units v oh output high voltage r l = 50 ? to v cco v cc - 0.020 v cc - 0.010 v cc v v out output voltage swing see figure 3a 300 390 475 mv v diff_out differential output voltage swing see figure 3b 600 780 950 mv r ou t output source impedance 45 50 55 ? three level eq input dc electrical characteristics (6) v cc = 2.375v to 2.625v; t a = ? 40c to +85c, unless otherwise stated. symbol parameter condition min typ max units v ih input high voltage v cc - 0.3 v v il in put low voltage 0 v ee +0.3 v i ih input high current v ih = v cc 400 ua i il input low current v il = gnd -480 ua note: 6. the circuit is designed to meet the dc specifications shown in the above table after thermal equilibrium has been established .
micrel, inc. sy56011r july 2008 6 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 ac electrical characteristics v cco = 1.14v to 1.26v r l = 50 ? to v cco, v cco = 1.7v to 1.9v, 2.375v to 2.625v, r l = 50 ? to v cco or 100 ? across the outputs, v cc = 2.375v to 2.625v; t a = ? 40c to +85c, unless otherwise stated. symbol parameter condition min typ max units f max maximum frequency nrz data 6.4 gbps v out > 200mv clock 4.5 ghz t pd propagation delay in -to - q note 7, figure 1 100 180 280 ps t skew within device skew note 8 3 15 ps part -to - part skew note 9 100 ps t jitter r andom jitter note 10 1 ps rms t r t f output rise/fall time (20% to 80%) at full output swing. 20 50 80 ps notes: 7. propagation delay is measured with no attenuating transmission line connected to the input. 8. within - device skew is measured across all outputs under identical input transition, temperature and power supply. 9. part - to - part skew is defined for two parts with identical power supply voltages at the same temperature and no skew at the edges at t he respective inputs. 10. random jitter is measured with a k28.7 pattern, measured at f max .
micrel, inc. sy56011r july 2008 7 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 interface applications for input interface applications see figures 4a - e and for cml output termination, see figures 5a - d. cml output termination with vcco 1.2v for vcco of 1.2v, figure 5a, terminate the output with 50 ohms to 1.2v, not 100 ohms differentially across the outputs. if ac - coupling is used, figure 5d, terminate into 50 ohms to 1.2v before the coupling capacitor and then connect to a high value resistor to a reference voltage. any unused output pair needs to be terminated, do not leave floating. cml output termination with vcco 1.8v for vcco of 1.8v, figure 5a and figure 5b, terminate either with 50 ohms to 1.8v or 100 ohms differentially across the outputs. ac - or dc - coupling is fine . for best signal integrity, terminate any unused output pairs. input termination 1.8v cml driver: terminate input with vt tied to 1.8v. don?t terminate 100 ohms differentially. 2.5v cml driver: terminate input with either vt tied to 2.5v or 100 ohms dif ferentially. the input cannot be dc - coupled from a 1.2v cml driver. timing diagrams figure 1. propagation delay
micrel, inc. sy56011r july 2008 8 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 typical characteristics v cc = 2.5, v cco = 1.2v, gnd = 0v, v in = 400mv, r l = 50 ? to 1.2v, data pattern: 2 23 - 1, t a = 25c, unless otherwise stated.
micrel, inc. sy56011r july 2008 9 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 input and output stage figure 2a. simplified differential input buffer figure 2b. simplified cml output buffer single- ended and differential swings figure 3a. single - ended swing figure 3b. differential swing
micrel, inc. sy56011r july 2008 10 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 input interface applications figure 4a. cml interface 100 ? differential (dc - coupled, 2.5v) figure 4b. cml interface 50 ? to v cc (dc - coupled, 1.8v, 2.5v) figure 4c. c ml interface (ac - coupled) figure 4d. lvpecl interface (ac - coupled) figure 4e. lvds interface (ac - coupled)
micrel, inc. sy56011r july 2008 11 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 cml output termination figure 5a. 1.2v or 1.8v cml dc - coupled termination figure 5b. 1.8v cml dc - coupled termination fig ure 5c. cml ac- coupled termination v cco 1.8v only figure 5d. cml ac - coupled termination v cco 1.2v only related product and support documents part number function datas heet link hbw solutions new products and termination application notes http://w ww.micrel.com/page.do?page=/product - info/as/hbwsolutions.shtml
micrel, inc. sy56011r july 2008 12 m9999 - 070208-a hbwhelp@micrel.com or (408) 955 - 1690 package information 16- pin qfn 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 cir cuitry 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 mal function of a product can reasonably be expected to re sult 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 res ult in a significant inju ry to the user. a purchaser?s use or sale of micrel products for use in life support appliances, devices or systems is a purchas er?s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2008 micrel, in corporated.

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