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  ex-245 evacuated miniature oven controlled crystal oscillator emxo tm vectron international - 267 lowell road, hudson, nh 03051 - tel: 1-88-vectron-1 - web: www.vectron.com - 1 - ex-245 series hi-reliability evacuated miniature crystal oscillat or emxo tm features features features features ? radiation tolerant to > 100krad (si) total dose ? low power consumption: <0.7w @ 25 o oo o c, <1.1w @-40 o oo o c ? low profile package: 0.93(w) x 1.03 (l) x 0.35 ( h) ? fast warm-up: 3 minutes @ 25 o oo o c ? frequencies:10 to 20mhz ? screen to class s* per mil-prf-55310 ? patented technique** applications applications applications applications ? reference clock for space application ? military airborne and mobile system note: * limit upper temperature to 85 o oo o c and constant acceleration to 1000gs * fine leak test is not applicable due to the pac kage seal under vacuum ** u.s. patent 5,917,272 performance characteristics parameters options conditions units minimum typica l maximum frequency mhz 10 20 supply voltage c v 4.75 5.0 5.25 turn-on power for 2 minutes @ 25 o c w 2 steady state @ 25 o c w 0.70 power consumption steady state @ -40 o c w 1.10 <1 x 10 -6 sec 120 warm-up time @ 25 o c <1 x 10 -7 sec 180 operating o c -40 +85 temperature storage o c -55 +85 duty cycle % 40 60 rise/fall time (10% to 90% vdd) with15pf load nsec 7 logic level 0 volt 0.1vdd cmos output a logic level 1 volt 0.9vdd g sine into 50ohms load dbm 0.0 1.5 3 h sine into 50ohms load dbm 3.0 4.5 6 harmonics dbc -25 sine output spurious dbc -60 c-308 0 o c to +70 o c reference to frequency @ 25 o c ppb +/-30 d-508 -20 o c to +70 o c reference to frequency @ 25 o c ppb +/-50 f-107 -40 o c to +85 o c reference to frequency @ 25 o c ppb +/-100 +/-5% of supply voltage ppb +/-10 stability +/-5% of load change ppb +/-10 after 7 days of operation ppb/day 2 1 st year ppb/year 200 10 to <12mhz ppb/10year 1000 12 to <16mhz ppb/10year 1500 aging 16 to 20mhz ppb/10year 2000 allan deviation tau = 1 second 2 x 10 -10 @ 10hz dbc/hz -100 @ 100hz dbc/hz -130 @ 1khz dbc/hz -140 @ 10khz dbc/hz -145 phase noise @ 100khz dbc/hz -150 efc (0v to 4v) a reference to nominal frequency sufficient to compen sate 10 years aging fixed frequency f initial accuracy reference to nominal frequency ppm -1.0 +1.0 vref source current 1ma maximum vdc 4.0 4.1 4.2 g-sensitivity test at 10g sine vibration at 100hz /g 1 x 10 -9
ex-245 evacuated miniature oven controlled crystal oscillator emxo tm vectron international - 267 lowell road, hudson, nh 03051 - tel: 1-88-vectron-1 - web: www.vectron.com - 2 - environmental conditions (designed to meet) ? radiation tolerant (operating): active devices ar e selected from a family of product that is inheren tly radiation tolerant to meet 100krad (si) total dose ? mechanical shock (survive)***: mil-std-202, test method 213, condition e (1000g, 0.5msec) ? vibration random (survive)***: mil-std-202, test method 214, condition i-f (20grms, 3 minutes/axis) ? vibration sine (survive)***: mil-std-202, test me thod 204, condition d (20grms, 20 minutes/axis) note: *** met by design, not tested package outline ordering information pin function pin # with efc fixed frequency 1 efc no connection 2-4 no connection no connection 8 case/gnd case/gnd 9 output output 13-14 no connection no connection 15 vref no connection 16 supply supply pin numbers are for reference only. they do not app ear on unit 150 183 220 60s 60-90s 45-60s time (s) temperature ( o c) reflow profile reflow profile ex 245 c a d 5 0 8 a 12.8000 ex = emxo package 245 supply voltage c = 5.0 vdc +/-5% output a = cmos g = +0dbm sine h = +3dbm sine temperature & stability c-308 = +/-30 ppb over -0 o c to +70 o c d-508 = +/-50 ppb over -20 o c to +70 o c f-107 = +/-100 ppb over -40 o c to +85 o c other options a = electrical frequency control (efc) f = fixed frequency output frequency 10.0000 mhz 12.8000 mhz 13.0000 mhz 16.3840 mhz 20.0000 mhz mhz s screening options s = product level s, mil-prf-55310 b = product level b, mil-prf-55310 e = engineering model (em) p = proof of design (pod) / prototype - - - -


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