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SM802109 clockworks ? pci-e quad 100mhz ultra-low jitter, hcsl frequency synthesizer clockworks is a trademark of micrel, inc rotarywave is a registered trademark of multigig, 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 september 2011 m9999-092911-b hbwhelp@micrel.com or (408) 955-1690 ber of the clockworks 3.3v or 2.5v pow and synthesizes four hcsl out put cloc SM802109 accepts a 25mhz crystal or reference clock. support documentation can be found on micrel?s web site at: www.micrel.com general description the SM802109 is a mem ? family of devices from micrel and provides an extreme timing solution for pci-express clock signals. on a unique patented rotarywave ? archite l y low-noise i t is based c ture that provides very-low phase noise. the device operates from a er supply k s at 100mhz. the lvcmos data sheets and f eatures . ock outputs at 100mhz ge 00mhz (1.875mhz to 20mhz): 105fs industrial temperature range (?40 c to +85 c) ? green, rohs, and pfos compliant ? available in 24-pin 4mm 4mm qfn package applications ? pci-express block diagram ? generate s four hcsl cl perating ran ? 2.5v or 3.3v o ? typical phase jitter @ 1 ?
micrel, inc. SM802109 september 2011 2 m9999-092911-b hbwhelp@micrel.com or (408) 955-1690 g inf ion (1) arki shipping temperature r package orderin ormat part number m ng ange sm 802109umg 802109 tube ?40c to +85 c 24-pin qfn SM802109umgtr 802109 tape and reel ?40c to +85 c 24-pin qfn note: 1. devices are green, rohs, a nd pfos compliant. pin configuration 2 ( pin description pin number nam pin 4-pin qfn top view) pin e type pin leve l pin function 16, 17 /q0, q0 1, q1 o, (dif) ck outputs from bank 1 100mhz 20, 21 /q hcsl differential clo 23, 24 3, 4 /q2, q2 /q3, q3 o, (dif) hcsl differential clock outputs from bank 2 100mhz 1 vddo2 pwr power supply for output bank 2 2 vsso2 pwr power supply ground for output bank 2 5 pll_bypass i, (se) lvcmos pll bypass, selects output source 0 = normal pll operation 1 = output from input reference clock or crystal 45k ? pulldown 6 xtal_sel i, (se) lvcmos selects pll input reference source 0 = ref_in, 1 = xtal, 45k ? pullup
micrel, inc. SM802109 september 2011 3 m9999-092911-b hbwhelp@micrel.com or (408) 955-1690 iption (con ber me pin typ level pin function pin descr tinued) pin num pin na e pin 7, 12, 15, 19 test factory test pins, do not connect anything to these pins. 8 d pwr pply vd core power su 13, 14 vss osed pa pwr pply ground. the exposed pad must e connected to the vss ground plane. (exp d) core power su b 18 pwr t bank 1 vddo1 power supply for outpu 22 vsso1 pwr power supply ground for output bank 1 9 f_in i, (s re e) lvcmos reference clock input 10 xtal_in i, (se) crystal crystal reference input, no load caps needed (see figure 5). 11 xtal_o ut (se) rystal crystal reference output, no load caps needed (see figure 5). o, c truth table pll_bypass xtal_sel input output 0 ? ? pll 1 ? ? xtal/ref_in ? 0 ref_in ? ? 1 xtal ?
micrel, inc. SM802109 september 2011 4 m9999-092911-b hbwhelp@micrel.com or (408) 955-1690 ..... o v ......... case temper ature ..................................................... 1 storage temperature (t s ) ......................... ? 65 c to + 150c tage (v dd , v ddo1/2 )............... +2.375v to +3.465v ?40c to +85c still-air ......................................................... 50c/w qfn ( jb ) junction-to-board ....................................... 30c/w acteri (4) o 5 5% or 2.5v 5% = ? 40c rameter ion min. typ. max. units absolute maximum ratings (1) supply voltage (v dd , v ddo1/2 ) ............................ .....+4.6v supply vol input voltage (v ) .............................. ? 0.50v t in lead temperature (soldering, 20s )................... dd + 0.5v 260c 15c qfn ( ja ) operating ratings (2) ambient temperature (t a ) .......................... junction thermal resistance (3) dc el ectr ical char stics v dd = v dd 1/2 = 3.3v 5% or 2.5v % v dd = 3.3v 5%, v ddo1/2 = 3.3v t a to + 85c. symbol pa condit v dd , v ddo1 o .37 2.5 2.625 v /2 2.5v operating v ltage 2 5 v dd , v ddo1/2 3.3v operating voltage 3.135 3.3 3.465 v i dd xtal_sel = 0 outputs 50 ? to v ss 140 175 ma ref_in supply current v dd + v ddo i dd supply current v dd + xtal v ddo xtal_sel = 1 outputs 50 ? to v ss 150 185 ma hcsl d ha acteristics (4) in typ. max. units c electrical c r v = v dd ddo1/2 = 3.3v 5% or 2.5v 5% v dd = 3.3v 5%, v ddo1/2 = 3.3v 5% or 2.5v 5% t a = ? 40c to + 85c. r l = 50 ? to v ss sy mbol parameter condition m v oh output high voltage 660 700 850 mv v ol output low voltage -150 0 27 mv v cross crossing point voltage 250 350 550 mv notes: 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional oper ation is not implied at conditions other than those detailed in the operational sections of this data shee t. exposure to absolute maximum rating con ditions 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 (o r equivalent) to the devices most negative potential on the pcb . 4. the circuit is designed to meet the ac and dc specifications shown in the above table(s) after thermal equilibrium has been established.
micrel, inc. SM802109 september 2011 5 m9999-092911-b hbwhelp@micrel.com or (408) 955-1690 tal_sel ) dc electrical characteristics (4) d 5% a 40c to + 85c. ymbo condition min. ty max. units lvcmos (pll_bypass, x v d = 3.3v 5%, or 2.5v , t = ? s l parameter p. v ih o 2 v dd + 0.3 v input high v ltage v il o ? 0.3 0.8 v input low v ltage i ih input high current v dd = v in = 3.465v 150 a i il input low current v dd = 3.46 5v, v in = 0v ? 150 a ref_i n dc electrical characteristics (4) v dd = 3.3v 5%, or 2.5v symbol pa ter min. ty max. units 5%, t a = ? 40c to + 85c. rame condition p. v ih input high voltage 1.1 v dd + 0.3 v v il input low volt age ? 0.3 0.6 v xtal_ sel = v il , v in = 0v d ? 5 a to v d 5 i in in put current v ih , v in = v dd 20 a xtal_sel = crystal char acteristics parameter condition min. typ. max. units mode of oscillation 10pf to 12pf load fundamental, parallel resonant frequency 25 mhz equivalent series resistance (esr) 50 ? shunt capacitor, c0 1 5 pf correlation drive level 10 100 w
micrel, inc. SM802109 september 2011 6 m9999-092911-b hbwhelp@micrel.com or (408) 955-1690 tics (4, 5) .3v 5%, .3v 5% or 2.5v 5% ? 40 0 ? to v s mbol pa condition typ. max. units ac el ical char ectr acteris .5v 5% v dd = v ddo1/2 = 3.3v 5% or 2 v dd = 3 v ddo1/2 = 3 t a = c to + 85c. r l = 5 s sy rameter min. f out uency 100 mhz output freq f re f t freque 25 mhz reference inpu ncy t r /t f output rise/fall time 20% ? 80% 150 300 450 ps lvpecl odc output duty cycle 48 50 52 % t ske w utput skew 45 ps output-to-o note 6 t lock pll lock time 20 ms t jit (? ) rms phase jitter integration ran (7) 100mhz ge (1.875mhz ? 20mhz) 105 250 fs in tegration range (12khz ? 20mhz) spurious noise components 25mhz ? 95 dbc notes: 5. all phase noise measurements were taken with an agilent 5052b phase noise system. 6. defined as skew between outputs at the same supply voltage and with equal load conditions; m easured at the output differenti al crossing points. 7. measured using 25mhz crystal as the i nput reference source. if using an external reference input, use a low phase noise sour ce. with an external reference, the phase noise will follow t he input source phase noise up to about 1mhz.
micrel, inc. SM802109 september 2011 7 m9999-092911-b hbwhelp@micrel.com or (408) 955-1690 ormation ting with a crystal input reference, do not ut as p ssible plies al load capacitance is built inside the die no selecting a family of precision synthesizers application note for details. contact micrel?s hbw applic ations group if you need assistance on selecting a suitable crystal fo our application at: hbwhelp@micrel.com application inf input reference when opera apply a switching signal to ref_in. crystal layo keep the layers under the crystal as open and do not place switching signals or noisy sup under the crystal. cryst o so external capacitance is needed. see the quartz crystal for the cloc kworks flex i further r y . ed with 50 ? to v ss . for oad all outputs. if you want to ac- couple or change the termination, contact micrel?s application group: hbwhelp@micrel.com hcsl outputs hcsl outputs are to be terminat best performance l .
micrel, inc. SM802109 september 2011 8 m9999-092911-b hbwhelp@micrel.com or (408) 955-1690 phase noise plots phase noise plot: 100mhz, 1.875mhz ? 20mhz 104fs phase noise plot: 100mhz, 12khz ? 20mhz 242fs
micrel, inc. SM802109 september 2011 9 m9999-092911-b hbwhelp@micrel.com or (408) 955-1690 figure 1. duty cycle timing figure 2. all outputs rise/fall time figure 3. rms phase/noise jitter
micrel, inc. SM802109 september 2011 10 m9999-092911-b hbwhelp@micrel.com or (408) 955-1690 figure 4. hcsl output load and test circuit figure 5. crystal input interface
micrel, inc. SM802109 september 2011 11 m9999-092911-b hbwhelp@micrel.com or (408) 955-1690 package information 24-pin package type m icrel, inc. 2180 fortune drive sa n jose, ca 95131 usa tel +1 (408 08) 474-1000 web http://www.micrel.com ) 944-0800 fax +1 (4 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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