sm802110 clockworks ? cpri 153.6mhz ultra-low jitter, lvpecl 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 january 2011 m9999-012111-a hbwhelp@micrel.com or (408) 955-1690 general description the sm802110 is a member of the clockworks ? family of devices from micrel and provides an extremely low-noise timing solution for cpri clock signals. it is based upon a unique patented rotarywave ? architecture that provides very low phase noise. the device operates from a 3.3v or 2.5v power supply and synthesizes an lvpecl output clock at 153.6mhz. the sm802110 accepts a 30.72mhz lvcmos reference clock. data sheets and support documentation can be found on micrel?s web site at www.micrel.com . features ? generates an lvpecl cl ock outputs at 153.6mhz ? 2.5v or 3.3v operating range ? typical phase jitter @ 153.6mhz (2mhz to 20mhz): 99fs (typical) at 3.3v ? industrial temperature range ? green, rohs, and pfos compliant ? available in 24-pin 4x4mm qfn applications ? cpri ? obsai ___________________________________________________________________________________________________________ block diagram
micrel, inc. sm802110 january 2011 2 m9999-012111-a hbwhelp@micrel.com or (408) 955-1690 ordering information part number marking shipping junction temperature range (1) package sm802110umg 802110 tube ?40c to +85c 24-pin qfn SM802110UMGR 802110 tape & reel ?40c to +85c 24-pin qfn note: 1. devices are green, rohs, and pfos compliant. pin configuration 24-pin qfn (top view) pin description pin number pin name pin type pin level pin function 16, 17 /q, q o, (dif) lvpecl differential clock output 1, 18 vddo pwr power supply for clock output 2, 22 vsso pwr power supply grounds for clock output 3, 4, 20, 21, 23, 24 nc no connect, do not connect anything to these pins. 5 pll_bypass i, (se) lvcmos pll bypass, selects output source 0 = normal pll operation 1 = output from input reference clock 45k ? pull-down 7, 10, 11, 12, 15, 19 test factory test pins. do not connect anything to these pins. 8 vdd pwr core power supply 9 ref_in i, (se) lvcmos reference clock input 6, 13, 14 vss pwr core power supply ground.
micrel, inc. sm802110 january 2011 3 m9999-012111-a hbwhelp@micrel.com or (408) 955-1690 absolute maximum ratings (1) supply voltage (v dd , v ddo ) .........................................+4.6v input voltage (v in ) .............................. ? 0.50v to v dd + 0.5v lead temperature (solde ring, 20sec .)....................... 260c case temper ature ..................................................... 115c storage temperature ................................?65c to +150c operating ratings (2) supply voltage (v dd , v ddo ) .................. +2.375v to +3.465v ambient temperature (t a ) .......................... ?40c to +85c junction thermal resistance (3) qfn ( ja ) still-air .........................................................50c/w qfn ( ja ) junction-to-board........................................30c/w dc electrical characteristics (4) v dd = v ddo = 3.3v 5% or 2.5v 5% v dd = 3.3v 5%, v ddo = 3.3v 5% or 2.5v 5% t a = ? 40 c to + 85 c. symbol parameter condition min. typ. max. units v dd , v ddo 2.5v operating voltage 2.375 2.5 2.625 v v dd , v ddo 3.3v operating voltage 3.135 3.3 3.465 v i dd supply current, v dd + v ddo outputs open 77 98 ma lvpecl dc electrical characteristics (4) v dd = v ddo = 3.3v 5% or 2.5v 5% v dd = 3.3v 5%, v ddo = 3.3v 5% or 2.5v 5% t a = ? 40 c to + 85 c. r l = 50 ? to v ddo ? 2v symbol parameter condition min. typ. max. units v oh output high voltage v ddo ? 1.145 v ddo ? 0.97 v ddo ? 0.845 v v ol output low voltage v ddo ? 1.945 v ddo ? 1.77 v ddo ? 1.645 v v swing output voltage swing 0.6 0.8 1.0 v note: 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. sm802110 january 2011 4 m9999-012111-a hbwhelp@micrel.com or (408) 955-1690 lvcmos (pll_bypass) dc electrical characteristics (4) v dd = 3.3v 5% or 2.5v 5%, t a = ?40c to +85c. symbol parameter condition min. typ. max. units v ih input high voltage 2 v dd + 0.3 v v il input low voltage ? 0.3 0.8 v i ih input high current v dd = v in = 3.465v 150 a i il input low current v dd = 3.465v, v in = 0v ? 5 a ref_in dc electrical characteristics (4) v dd = 3.3v 5% or 2.5v 5%, t a = ?40c to +85c. symbol parameter condition min. typ. max. units v ih input high voltage 1.1 v dd + 0.3 v v il input low voltage ? 0.3 0.6 v i in input current v dd = 3.465v, v in = 0v to v dd ? 5 5 a ac electrical characteristics (4, 5) v dd = v ddo = 3.3v 5% or 2.5v 5% v dd = 3.3v 5%, v ddo = 3.3v 5% or 2.5v 5% t a = ? 40 c to + 85 c. r l = 50 ? to v ddo ? 2v symbol parameter condition min. typ. max. units f out output frequency 153.6 mhz f ref reference input frequency 30.72 mhz t r /t f lvpecl output rise/fall time 20% ? 80% 80 175 350 ps odc output duty cycle 48 50 52 % t lock pll lock time 20 ms t jit ( ? ) rms phase jitter (6) output = 153.6 mhz integration range (2mhz ? 20mhz) 99 fs spurious noise components 30.72mhz ? 70 dbc notes: 5. all phase noise measurements were taken with an agilent 5052b phase noise system. 6. ref_in driven with a low noise source clockw orks sm802001 programmed for a 30.77mhz cmos output.
micrel, inc. sm802110 january 2011 5 m9999-012111-a hbwhelp@micrel.com or (408) 955-1690 phase noise plot 153.8mhz 2mhz-20mhz 99fs output is 153.85mhz with a 30.77mhz input
micrel, inc. sm802110 january 2011 6 m9999-012111-a 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 figure 4. lvpecl output load and test circuit
micrel, inc. sm802110 january 2011 7 m9999-012111-a hbwhelp@micrel.com or (408) 955-1690 package information 24-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 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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