general description the ds4077 is an integrated voltage-controlled crystal oscillator (vcxo) module designed to provide reference clock generation in base stations, telecom/datacom, and wireless applications. the ds4077 is developed using a fundamental quartz crystal plus a unique integrated cir- cuit design. the internal fundamental quartz crystal determines the frequency of operation. custom frequen- cies are available. contact the factory for availability. the ds4077 is designed for use with applications requir- ing low phase noise and jitter. jitter performance of bet- ter than 1ps rms is achieved over the 12khz to 80mhz range. phase noise performance of better than -130dbc/hz at 1khz is achieved with this design. features ? 77.76mhz (f nom ) frequency ? 3.135v to 3.465v operation ? low jitter: <1ps rms ? ?9ppm absolute pull range (apr) ? lvcmos output buffer ? minimum ?10ppm tuning range (+25?) ? available in commercial or industrial temperature ranges ? 14mm x 9mm x 3.06mm plastic lga package ds4077 77.76mhz vcxo ______________________________________________ maxim integrated products 1 n.c. n.c. n.c. n.c. lvcmos v ss 1 9 8 7 6v dd 5 n.c. vc (transfer-molded plastic package) lga top view 2 34 ds4077 pin configuration applications rev 0; 8/05 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information part temp range pin- package top mark* ds4077l-0c0 0? to +70? 9 lga ds4077l-0c0 DS4077L-0CN -40? to +85? 9 lga DS4077L-0CN * the top mark includes an ??for industrial temperature grade devices. clock-data recovery in telecom/datacom applications data retiming reference clock generation in base stations and wireless applications block diagram x1 v dd lvcmos output varactor osc control crystal vc x2 ds4077
ds4077 77.76mhz vcxo 2 _____________________________________________________________________ absolute maximum ratings electrical characteristics (v dd = 3.135v to 3.465v, t a = -40? to +85? or 0? to +70?, unless otherwise noted.) (typical values at +25?, v dd = 3.3v, unless otherwise noted.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. vc, v dd , lvcmos output .......................................-0.3v, +3.6v operating temperature range (noncondensing) ..............................................-40? to +85? junction temperature ......................................................+150? thermal resistance junction to ambient .................................................91.06?/w junction to case ......................................................44.51?/w storage temperature range .............................-55? to +125? soldering temperature (reflow, 2 passes max)....see ipc/jedec std-020 specification parameter symbol conditions min typ max units v dd operating supply range v dd 3.135 3.3 3.465 v v dd supply current i dd output open 20 30 ma frequency f out vc = 1.6v, v dd = 3.3v, t a = +25?, load = 10pf f nom ?ppm f nom f nom +8ppm mhz frequency vs. v dd sensitivity v dd ppm v dd = 3.3v ?% -3.5 +11.5 ppm frequency vs. load sensitivity loadpmm 10pf to 20pf (note 2) -1 ppm frequency vs. temperature tempppm from +25? -20 +20 ppm vc voltage range vc range 0.3 1.60 2.8 v frequency tuning sensitivity vc sen (note 3) 41 164 ppm/v tuning voltage bandwidth vc bw (note 2) 10 khz absolute pull range f tune vc = 0.3v to 2.8v, load = 10pf -69 +69 ppm vc input leakage i lcv vc = 0v to v dd -500 +500 na aging, first year ageppm -5 +5 ppm aging, years 0?0 t age total aging -10 +10 ppm
ds4077 77.76mhz vcxo _____________________________________________________________________ 3 electrical characteristics (continued) (v dd = 3.135v to 3.465v, t a = -40? to +85? or 0? to +70?, unless otherwise noted.) (typical values at +25?, v dd = 3.3v, unless otherwise noted.) (note 1) note 1: limits at -40? are guaranteed by design and not production tested. note 2: guaranteed by design and not production tested. note 3: tuning linearity typically better than ?0%. parameter symbol conditions min typ max units lvcmos output output logic 0 v ol output current -450? 0 0.4 v output logic 1 v oh output current +450? v dd - 0.8v v dd v output rise time t r load condition: 10pf to ground; 10% to 90% v dd (note 2) 2ns output fall time t f load condition: 10pf to ground; 90% to 10% v dd (note 2) 2ns duty cycle d cyc load condition: 10pf, v dd / 2 (note 2) 40 60 % harmonics h v dd = 3.3v, t a = +25? (note 2) -18 -8 dbc/hz ssb phase noise and jitter, v dd = 3.3, t a = +25? (note 2) 10hz offset -74 100hz offset -105 1khz offset -130 10khz offset -147 100khz offset lvcmos -150 dbc/hz jitter (12khz to 80mhz) 1 ps rms pin description pin name function 1v c vcxo control voltage 2, 5, 7, 8, 9 n.c. no connection 3v ss ground 4 lvcmos lvcmos output 6v dd dc power
ds4077 77.76mhz vcxo maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 4 _____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2005 maxim integrated products printed usa is a registered trademark of maxim integrated products, inc. is a registered trademark of dallas semiconductor corporation. package information (for the latest package information, go to www.maxim-ic.com/dallaspackinfo and click on package drawing 56-g6034-001.) t ypical operating characteristics (v cc = +3.3v, t a = +25?c, unless otherwise noted.) frequency vs. temperature ds4077 toc01 temperature ( c) f out deviation (ppm) 60 40 20 0 -20 -8 -6 -4 -2 0 2 4 6 8 10 -10 -40 80 f out = 77.76mhz output frequency vs. load capacitance vs. vc ds4077 toc02 vc (v) f out deviation (ppm) 2.8 1.8 2.3 1.3 0.8 -50 -75 -100 125 100 75 50 25 0 -25 150 -125 0.3 c l = 0pf c l = 20pf f out = 77.76mhz output frequency vs. supply voltage vs. vc ds4077 toc03 v dd (v) f out deviation from v dd = 3.3v (ppm) 3.410 3.465 3.355 3.190 3.245 3.300 -10 -15 15 10 5 0 -5 20 -20 3.135 f out = 77.76mhz t a = +25 c vc = 0.3v vc = 2.8v vc = 1.6v
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