valpey fisher corporation ? 75 south street, hopkinton, ma 01748 ? tel. 1-800-xtalrep, 508-435-6831 ? fax 508 4355289 1 rev c1208 *not recommended for new designs below 640mhz ? see vfxo301 * pin 1 n/c pin 2 tristate pin 3 ground pin 4 output 1: q pin 5 output 2: q pin 6 +v dd vf231c crystal oscillators lvpecl/lvds 3.3v 5x7 mm surface mount 750 khz to 800 mhz features ? high speed ? low jitter lvpecl or lvds output with tristate ? small smd package (5x7 mm) ? stability options from +/-20ppm to +/-100ppm ? commercial or industrial temperature range ? rugged, hermetic package for automated assembly description valpey fisher?s vf231c surf ace mount oscillators provi de waveforms for clocking lvpecl and lvds circuits. the 5x7mm footprint package provides the performance of larg er oscillators with a level of board space reduction achieved. asic technology is used to accomplish size reduction and enhance performance and reliability. low jitter output signals are generated. the wide range of freq uencies offered, many stability options, and industrial temperature range availability, make this model the solution for many applications. a tristate function is included to allow for easy automated testing of assemb lies. tape and reel packaging is standard. connections typical applications ? telecom / networking systems that require low jitter clocks ? dsl ? 10 gigabit ethernet ? sonet / sdh / fibre channel
valpey fisher corporation ? 75 south street, hopkinton, ma 01748 ? tel. 1-800-xtalrep, 508-435-6831 ? fax 508 4355289 2 rev c1208 electrical specifications frequency range 750 khz to 800 mhz frequency stability includes calibration at 25c, operating 100, 50, 25 or 20 ppm temperature, change of input voltage, change of load, shock and vibration min typ max units input voltage, v dd 3.15 3.3 3.45 volts jitter period jitter rms 19.44mhz 2.2 3.5 ps 77.76mhz 3.5 5.0 ps 155.52mhz 4.3 5.8 ps 622.08mhz 5.0 6.5 ps integrated jitter rms 12 khz to 20 mhz @ 155.52mhz 2.6 4 ps symmetry at (v dd -1.3) v dc (pecl) 40 50 60 percent at (1.25 v dc ) (lvds) 40 50 60 percent aging first year 3 ppm after first year 1 ppm/yr tristate input requirements for pin 2: ?1?: on-pin 1 may float or 2.8v min ?0?: tristate-pin 1 requires 0.4v max typical phase noise (dbc/hz) 10hz 100hz 1khz 10khz 100khz oscillator frequency 19.44mhz -80 -108 -132 -142 -150 106.25mhz -72 -103 -122 -130 -125 155.52mhz -65 -95 -120 -125 -121 622.08mhz -55 -85 -109 -115 -110 environmental specifications temperature *operating 0 to 70c storage -55to +125c shock - 1000 gs, 0.35 ms, ? sine wave, 3 shocks in each plane vibration - 10-2000 hz of .06? d.a. or 20 gs, whichever is less humidity - resistant to 85 r.h. at 85c mechanical specifications leak - mil std 883, method 1014, condition a1 case - ceramic with hermetic resistance-welded metal lid pads - solderable gold over nickel marking - epoxy ink or laser engraved resistance to solvents - mil std 202, method 215 *operating -40 to +85c also available. marking specification the format for the marking is: valpey-fisher model code (xx) date code (yy) oscillator vf231cxx 750.00 yyxx pin 1 frequency vf231c crystal oscillators lvpecl/lvds 3.3v 5x7 mm surface mount 750 khz to 800 mhz
valpey fisher corporation ? 75 south street, hopkinton, ma 01748 ? tel. 1-800-xtalrep, 508-435-6831 ? fax 508 4355289 3 rev c1208 pecl output models electrical specifications . min typ max units rl = 50 ? to (v dd - 2v) (see figure) output high voltage, v oh vdd-1.025 v output low voltage, v ol vdd-1.620 v input current, pecl 0.75 ? 24 mhz 25 ma 24 ? 160 mhz 65 ma 160 ? 800 mhz 100 ma switching characteristics clock rise time, tr @20/80% 0.3 0.35 ns clock fall time, tf @80/20% 0.3 0.35 ns lvds output models electrical specifications min typ max units rl = 100 ? (see figure) output differential voltage, v od 247 355 454 mv output high voltage, v oh 1.4 1.6 v output low voltage, v ol 0.9 1.1 v offset voltage, v os 1.125 1.2 1.375 v input current, lvds 0.75 ? 24 mhz 25 ma 24 ? 96 mhz 45 ma 96 ? 800 mhz 80 ma switching characteristics differential clock rise time, tr 0.3 0.4 ns differential clock fall time , tf 0.3 0.4 ns how to order for part number, put package type before model number, and add frequency in mhz, for example: vf231c a a t a 125 m frequency stability temperature range tristate output logic frequency m=mhz a=+/-100ppm a=0 to 70c t=tristate a=45/55%lvds k=khz b=+/-50ppm b=-40 to +85c n=non tristate b=40/60%lvds c=+/-25ppm c=45/55%pecl d=+/-20ppm d=40/60%pecl vf231c crystal oscillators lvpecl/lvds 3.3v 5x7 mm surface mount 750 khz to 800 mhz
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