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SY54023AR low voltage 1.2v/1.8v cml 2x2 crosspoint switch 3.2gbps, 3.2ghz precision edge is a registered trademark of micrel, inc. mlf and micro leadframe are registered trademarks of amkor technology. micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? te l +1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micre l.com june 2008 m9999-062608-a hbwhelp@micrel.com or (408) 955-1690 g eneral description the SY54023AR is a fully differential, low voltage 1.2v/1.8v cml 2x2 crosspoint. the SY54023AR can process clock signals as fast as 3.2ghz or data patterns up to 3.2gbps. the differential input includes micrel?s unique, 3-pin input termination architecture that interfaces to lvpecl, lvds or cml differential signals, (ac- or dc-coupled from a 2.5v driver) as small as 100mv (200mv pp ) without any level-shifting or termination resistor networks in the signal pat h. for ac-coupled input interface applications, an internal voltage reference is provided to bias the v t pin. the outputs are 400mv cml, with extremely fast rise/fall times guaranteed to be less than 95ps. the SY54023AR operates from a 2.5v 5% core supply and a 1.8v or 1.2v 5% output supply and is guaranteed over the full industrial temperature range (? 40c to +85c). the SY54023AR 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 cml 2x2 crosspoint switch ? guaranteed ac performance over temperature and voltage: ? dc-to- > 3.2gbps throughput ? <310ps propagation delay (in-to-q) ? <15ps output skew ? <95ps rise/fall times ? ultra-low jitter design ? <1ps rms cycle-to-cycle jitter ? <10ps pp total jitter ? <1ps rms random jitter ? <10ps pp deterministic jitter ? high-speed cml outputs ? 2.5v 5% , 1.8/1.2v 5% power supply operation ? industrial temperature range: ?40c to +85c ? available in 16-pin (3mm x 3mm) mlf ? package applications ? data distribution: oc-48, oc-48+fec ? sonet clock and data distribution ? fibre channel clock and data distribution ? gigabit ethernet clock and data distribution markets ? storage ? ate ? test and measurement ? enterprise networking equipment ? high-end servers ? access ? metro area network equipment
micrel, inc. SY54023AR june 2008 2 m9999-062608-a hbwhelp@micrel.com or (408) 955-1690 ordering information (1) part number package type operating range package marking lead finish SY54023ARmg mlf-16 industrial 023a with pb-free bar-line indicator nipdau pb-free SY54023ARmgtr (2) mlf-16 industrial 023a with pb-free bar-line indicator nipdau 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 mlf ? (mlf-16)
micrel, inc. SY54023AR june 2008 3 m9999-062608-a hbwhelp@micrel.com or (408) 955-1690 pin description pin number pin name pin function 16,1 4,5 in0, /in0 in1,/in1 differential inputs: these input pairs are th e differential signal inputs to the device. they accept differential signals as small as 100mv (200mv pp ). each input pin internally terminates with 50 ? to the vt pin. 2 3 vt0 vt1 input termination center-tap: each side of t he differential input pair terminates to a vt pin. this pin provides a center-tap to a termination network for maximum interface flexibility. an internal high impedance resistor divider biases vt to allow input ac-coupling. for ac-coupling, bypass vt with a 0.1f low esr capacitor to vcc. see ?interface applications? subsection and figure 2a. 15 6 sel0 sel1 these single-ended ttl/cmos-compatible inputs select the inputs to the crosspoint switch. note that this input is internally connected to a 25k ohm pull-up resistor and will default to a logic high state if left open. 7 vcc positive power supply: bypass with 0.1uf//0.01uf low esr capacitors as close to the v cc pin as possible. supplies input and core circuitry. 8,13 vcco output supply: bypass with 0.1uf//0.01uf low esr capacitors as close to the v cco pins as possible. supplies the output buffer. 14 gnd, exposed pad ground: exposed pad must be connected to a ground plane that is the same potential as the ground pin. 12,11 10,9 q0, /q0 q1, /q1 cml differential output pairs: differentia l buffered copy of the input signal. the output swing is typically 390mv. see ?i nterface applications? subsection for termination information. truth table sel0 sel1 q0 q1 l l in0 in0 l h in0 in1 h l in1 in0 h h in1 in1
micrel, inc. SY54023AR june 2008 4 m9999-062608-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 +2.7v v cc - v cco ...............................................................<1.8v v cco - v cc ...............................................................<0.5v input voltage (v in ) ............................?0.5v to v cc + 0.5v cml output voltage (v out ) ............... 0.6v to v cco +0.5v current (v t ) source or sink current on vt pin .................100ma input current source or sink current on (in, /in).................50ma maximum operating junc tion temperature .......... 125c lead temperature (solde ring, 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 1.9v ambient temperature (t a ) ................... ?40c to +85c package thermal resistance (3) mlf ? still-air ( ja ) ............................................ 75c/w junction-to-board ( jb ) ......................... 33c/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 2.375 1.14 1.7 2.5 1.2 1.8 2.625 1.26 1.9 v v v i cc power supply current max. v cc 37 50 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 input resistance (in-to-/in) 90 100 110 ? v ih v il input high voltage (in, /in) input low voltage (in, /in) in, /in v il with v ih = 1.2v 1.2 0.2 v cc v ih ?0.1 v v v ih v il input high voltage (in, /in) input low voltage (in, /in) in, /in v il with v ih = 1.14v, (1.2v-5%) 1.14 0.66 v cc v ih ?0.1 v v v in input voltage swing (in, /in) see figure 3a 0.1 1.0 v v diff_in differential input voltage swing (|in - /in|) see figure 3b 0.2 2.0 v v t_in voltage from input to v t 1.28 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 deta iled in the operational sections of this data sheet. exposure to absolute maximum ra tings conditions 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. package thermal resistance assumes exposed pad is soldered (or equivalent) to the device's most negative potential on the pc b. 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 establishe d.
micrel, inc. SY54023AR june 2008 5 m9999-062608-a hbwhelp@micrel.com or (408) 955-1690 cml outputs dc electrical characteristics (5) v cco = 1.14v to 1.26v r l = 50 ? to v cco, v cco = 1.7v to 1.9v, 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 cco -0.020 v cco -0.010 v cco 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 out output source impedance 45 50 55 ? lvttl/cmos dc electric al characteristics (5) v cc = 2.5v 5%; v cco = 1.14v to 1.26v or 1.7v to 1.9v; t a = ?40c to +85c, unless otherwise stated. symbol parameter condition min typ max units v ih input high voltage 2.0 v cc v v il input low voltage 0.8 v i ih input high current - 125 30 a i il input low current -300 a note: 5. the circuit is designed to meet the dc specifications shown in the above table after thermal equilibrium has been establishe d.
micrel, inc. SY54023AR june 2008 6 m9999-062608-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, 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 nrz data 3.2 gbps f max maximum frequency v out > 200mv clock 3.2 ghz figure 1a 150 210 310 ps t pd propagation delay in-to-q sel - to-q figure 1a 90 200 350 ps input-to-input skew note 6 5 20 ps output-to-output skew note 7 3 15 ps t skew part-to-part skew note 8 75 ps data random jitter note 9 1 ps rms deterministic jitter note 10 10 ps pp clock cycle-to-cycle jitter note 11 1 ps rms total jitter note 12 10 ps pp t jitter crosstalk induced jitter (adjacent channel) note 13 0.7 ps pp t r t f output rise/fall times (20% to 80%) at full output swing. 30 60 95 ps duty cycle differential i/o 47 53 % notes: 6. input-to-input skew is the difference in time between both inputs, measured at the same output for the same temperature, vol tage and transition. 7. output-to-output skew is the difference in time between both outputs, receiving data from the same input, for the same tempe rature, voltage and transition. 8. 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. 9. random jitter is measured with a k28.7 pattern, measured at f max . 10. deterministic jitter is measur ed at 2.5gbps with both k28.5 and 2 23 ?1 prbs pattern. 11. cycle-to-cycle jitter definition: the variation period between adjacent cycles over a random sample of adjacent cycle pairs . t jitter _ cc = t n ?t n+1 , where t is the time between rising edges of the output signal. 12. total jitter definition: with an ideal clock input frequency of f max (device), 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 induced jitter is defined as the added jitter that results from si gnals applied to the adjacent channel. it is measured at the output while applying a similar, differential clock frequency to both i nputs that is asynchronous with respect to each other.
micrel, inc. SY54023AR june 2008 7 m9999-062608-a hbwhelp@micrel.com or (408) 955-1690 interface applications for input interface applications, see figures 4a through 4f and for cml output termination, see figure 5a through figure 5d. cml output termination with vcco 1.2v for vcco of 1.2v, figure 5a, terminate the output with 50 ? -to-1.2v, dc coupled, not 100 ? differentially across the outputs. if ac-coupling is used, figure 5d, terminate into 50 ? - to-1.2v before the coupling capacitor and then connect to a high value resistor to a reference voltage. do not ac couple with internally terminated receiver. for example, 50 ? any-in input. ac-coupling will offset the output voltage by 200mv and this offset voltage will be too low for proper driver operation. any unused output pair needs to be terminated when vcco is 1.2v, do not leave floating. cml output termination with vcco 1.8v for vcco of 1.8v, figure 5a and figure 5b, terminate with either 50 ? -to-1.8v or 100 ? differentially across the outputs. ac- or dc-coupling is fine. input ac coupling the SY54023AR input can accept ac-coupling from any driver. bypass vt with a 0.1f low esr capacitor to vcc as shown in figures 4c and 4d. vt has an internal high impedance resistor divider as shown in figure 2a, to provide a bias voltage for ac-coupling. timing diagrams figure 1a. propagation delay
micrel, inc. SY54023AR june 2008 8 m9999-062608-a hbwhelp@micrel.com or (408) 955-1690 typical characteristics v cc = 2.5v, v cco = 1.2v gnd = 0v, v in = 100mv, r l = 50 ? to 1.2v, t a = 25c, unless otherwise stated.
micrel, inc. SY54023AR june 2008 9 m9999-062608-a hbwhelp@micrel.com or (408) 955-1690 functional characteristics v cc = 2.5v, 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. SY54023AR june 2008 10 m9999-062608-a hbwhelp@micrel.com or (408) 955-1690 functional characteristics v cc = 2.5v, v cco =1.2v gnd = 0v, v in = 400mv, r l = 50 ? to 1.2v, t a = 25c, unless otherwise stated.
micrel, inc. SY54023AR june 2008 11 m9999-062608-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 di fferential swings figure 3a. single-ended swing figure 3b. differential swing
micrel, inc. SY54023AR june 2008 12 m9999-062608-a hbwhelp@micrel.com or (408) 955-1690 input interface applications figure 4a. cml interface (dc-coupled, 1.8v, 2.5v) figure 4b. cml interface (dc-coupled, 1.2v) figure 4c. cml interface (ac-coupled) figure 4d. lvpecl interface (ac-coupled) figure 4e. lvpecl interface (dc-coupled) figure 4f. lvds interface
micrel, inc. SY54023AR june 2008 13 m9999-062608-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 figure 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 datasheet link sy54023r 3.2gbps/2.5ghz precision, 2x2 low voltage cml crosspoint switch with internal termination and fail safe inputs http://www.micrel.com/page.do?page=/product- info/products/sy54023r.shtml hbw solutions new products and termination application notes http://www.micrel.com/page.do?page=/product- info/as/hbwsolutions.shtml
micrel, inc. SY54023AR june 2008 14 m9999-062608-a hbwhelp@micrel.com or (408) 955-1690 package information 16-pin mlf ? (3mm x3mm) (mlf-16) 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 belie ved to be accurate and reliable. however, no responsibility is a ssumed by micrel for its use. micrel reserves the right to change circuitry and specificati ons at any time without notification to the customer. 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 personal injury. li fe 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 resul t in a significant injury to the user. a purchaser?s use or sale of micrel produc ts for use in life support applianc es, devices or systems is a pu rchaser?s own risk and purchaser agrees to fully indemnify micrel fo r any damages resulting from such use or sale. ? 2008 micrel, incorporated.

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