english ? ? ?Z ? ??? lo g in | re g iste r enter keywords or part number what's new products solutions design appnotes support sales about us members MAX3678 low-jitter frequency synthesizer wi th intelligent dynamic switching industry's best jitter performance exce eds serdes reference clock specification an evaluation kit is available: MAX3678evkit maxim > products > [ optoelectronics ] [ storage products (sas/sata/enclosure management) ] quickview technical documents ordering info more information user comments (0) all status active: in production. description the MAX3678 is a low-jitter frequency synthesizer wi th intelligent dynamic clock switching optimized for systems where redundant clock failove r switching is needed. it contains a monolithic phase-locked loop (pll) that accepts two reference clock inputs and generates nine phase-aligned outputs. the device continuously monitors the signal status for both reference cloc k inputs. in the event that the primary clock fails, the pll aut omatically switches to the secondary clock input with out generating a phase bump at the clock outputs, using a glitchless switchover mecha nism. a manual switch mode is also provided for user-controlled switch ing. the device features ultra- low jitter generation of 0.3ps rms (integrated 12khz to 20mhz) and excelle nt power-supply noise rejection. the MAX3678 operates from a single +3.3v supply and typically consumes 400mw. the operating temperat ure range is from 0c to +85c, and is available in a 8 mm x 8mm, 56-pin tqfn package. request full data sheet key features z two reference clock inputs: lvpecl z nine phase-aligned clock outputs: lvpecl z automatic or manual dynamic switching between two reference clock inputs z input frequencies: 66.67mhz, 133.33mhz, 266.67mhz, 333.33mhz z output frequencies: 66.67mhz, 133.33mhz, 266.67mhz, 333.33mhz z low-jitter generation: 0.3ps rms (12khz to 20mhz) z clock failure indicator for both reference clocks z external feedback provides zero-delay capability z low output skew: 20ps typical z typical power dissipation: 400mw at +3.3v z operating temperature: 0c to +85c key specifications: clock generators part number applications f in (mhz) f in (mhz) f out (mhz) f out (mhz) fixed or continuous frequency output levels out- puts plls program- mability spread spectrum output jitter (ps) v supply (v) package/pins price min max min max rms see notes MAX3678 general purpose 66.67 333.33 66.67 333.33 fixed lvpecl 9 1 pin no 0.28 3.3 tqfn/56 $14.66 @1k see all clock generators (27) didn't find what you need? z next day product selection assistan ce from applications engineers z parametric search z applications help quickview technical documents ordering info more information description key features applications/uses key specifications data sheet application notes design guides engineering journals price and availability samples buy online package information related products notes and comments evaluation kits page 1 of 2 quickview - MAX3678 low- jitter frequency synt hesizer with intellig ent dynamic switching 11/9/2009 htt p ://www.maxim-ic.com/ q uick _ view2.cfm/ q v _p k/5690
document ref.: 19-4115; rev 0; 2008-05-23 this page last modified: 2008-09-12 diagram reliability reports software/models evaluation kits lead-free information contact us ? rate this page ? mail this page ? privacy policy ? legal notices copyright ? 2009 by maxim integrated products page 2 of 2 quickview - MAX3678 low- jitter frequency synt hesizer with intellig ent dynamic switching 11/9/2009 htt p ://www.maxim-ic.com/ q uick _ view2.cfm/ q v _p k/5690
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