75 south street, hopkinton, ma 01748 ? 800-982-5737 ? 508-435-6831 ? fax 508-435- 5289 ? www.valpeyfisher.com ? reve0907 1 vftx140 stratum 3 tcxo to 1.0 ghz 25.4x22mm smd, lvpecl electrical s p ecifications description the vftx140 is a stratum 3 tcxo capable of providi ng an output frequency up to 1 ghz. the temperature stability is less than 0.28 ppm over a temperature range of 0oc to + 70oc. operating with a +3.3 volt power supply the device typically consumes 220 mw. the devi ce contains an internal voltage regulator for improved stability and noise performance. the out put is configured as a differential lvpecl signal and r equires external termination resistors. the vftx140 is avail able in a 25.4mm x 22mm surface mount package. parameter symbol condition min typ max unit note frequency range f 200 1,000 mhz frequency stability ? f/f vs. operating temperature 0 c to +70 c 0.28 ppm overall conditions including aging 20 years 4.6 ppm operating temperature range t 0 +70 c output lvpecl supply voltage vcc 3.15 3.30 3.45 v voltage control vc 0 3.3 v input impedance 10k ? apr 5 ppm deviation slope monotonic positive linearity -10 +10 % modulation bw 10 hz 3db bw features ? stratum 3 timing source ? 200mhz to 1.0 ghz frequency range ? ultra low jitter and phase noise: -118 dbc/hz @ 1khz ? low power: <220mw typical applications ? sonet / sdh / atm ? 10 gigabit ethernet ? digital wireless reference rohs status
75 south street, hopkinton, ma 01748 ? 800-982-5737 ? 508-435-6831 ? fax 508-435- 5289 ? www.valpeyfisher.com ? reve0907 2 vftx140 stratum 3 tcxo to 1.0 ghz 25.4x22mm smd, lvpecl electrical specifications parameter symbol condition min typ max unit note input current icc 50 ohm load 65 80 ma load 50 ohm to vcc-2v or thevenin equivalent duty cycle @ 50% 45 50 55 % rise / fall time tr/tf 20% to 80% 0.6 ns logic ?1? level voh vcc-0.96 vcc-0.81 v logic ?0? level vol vcc-1.85 vcc-1.65 v start up time 2 10 ms phase jitter 12khz to 20mhz 0.25 0.5 ps ssb phase noise 100hz 1khz 10khz 100khz -90 -118 -142 -145 dbc/hz @ 622.08 mhz setability ref. to ? o 0.1 ppm setability voltage 1.3 1.7 v enable / disable function input high (>2.5v): disabled input low (<0.5v) or floating: active lvcmos enable / disable time te/td 100 ns how to order temperature range code specification b 0c to 70c vftx140 frequency , mhz supply voltage code specification e 3.3v 5%
75 south street, hopkinton, ma 01748 ? 800-982-5737 ? 508-435-6831 ? fax 508-435- 5289 ? www.valpeyfisher.com ? reve0907 3 vftx140 stratum 3 tcxo to 1.0 ghz 25.4x22mm smd, lvpecl parameter symbol condition min typ max unit note supply break down voltage vcc -0.5 5.5 v storage temperature ts -55 +105 c control voltage vc -0.5 6 v parameter specification mechanical shock per mil-std-202, method 213, condition e thermal shock per mil-std-883, method 1011, condition a vibration per mil-std-883, method 2007, condition a soldering conditions 260 c for 10s max hermetic seal leak rate less than 5x10 - 8 atm.cc/s of helium (crystal only) 3 4 5 2 1 6 7 r3 10k ? c1 .01 uf vcc = 3.3v gnd r1 180 ? fou t nfout r2 180 ? disable nc vc absolute maximum ratin g s environmental and mechanical connection diagram mechanical outline pin # connection 1 vc 2 n/c 3 vcc 4 n/c 5 output 6 output 7 gnd
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