product data sheet v-type voltage controlled crystal oscillator (vcxo) features ?output frequencies to 77.760 mhz ?5.0 or 3.3 volt operation ?tri-state output ?jitter performance <6 ps rms (freq >12mhz) ?vcxo with switchablettl/cmos output ?robust 6 contact leadless ceramic chip carrier ?7.49 x 5.08 x 1.8 mm surface mount device ?absolute pull range performance to 100 ppm ?commercial and industrial temperature range ?eia compatible tape and reel packaging applications ?xdsl customer premise equipment (cpe) ?cable modems ?hfc subscriber equipmemt ?atm/sonet/sdh applications description the vi v-type voltage controlled crystal oscillator (vcxo) is a quartz-stabilized square-wave generator with selectable ttl or cmos output. the device is hermetically sealed in a leadless ceramic chip carrier with 6 contact pads. the v-type s ultra small footprint and low pro- file make it ideally suited to applications where space is limited or where backside assembly is required.
v-type voltage controlled crystal oscillator (vcxo) vectron international ?166 glover avenue, norwalk, ct 06856 ?tel: 1-88-vectron-1 ?fax: 1-888-fax-vectron pin information table 1. 1 vc control voltage. 2 2 ttl/cmos 1 ttl logic low for cmos optimized symmetry ttl logic high or no connection for ttl optimized symmetry. 3 gnd case/circuit ground. 4 output output waveform. 5 2 tri-state ttl logic low diables output. ttl logic high or no connection enables output waveform. 6v dd supply v oltag e , 5 v ?0%, or 3.3v ?0% pin # symbol name/function 1. this silicon oscillator is fabricated in cmos technology and its output waveform will swing between ground and vdd for all but the highest frequency applications. to account for the difference in switching thresholds between ttl logic (1.40 v) and cmos logic (vdd/2), the ttl/cmos lead modifies the ?n time of the oscillator for maximum symmetry about the ttl or cmos logic threshold. ttl logic low pro vides wave- form symmetry for cmos. ttl logic high or no connection pro- vides waveform symmetry for ttl. at output frequencies less than 12 mhz, this option is not provided as the waveform tran- sition times are small compared to the period. hence, for f o <12 mhz this pin should be grounded for electrical isolation. 2. alternate pin configuration for tri-state control on pin 2 and ttl/cmos on pin 5. alternate configuration is indicated by last letter of part code ? for tristate pin 2 and ttl/cmos on pin 5. table 2. performance specifications 1 a 0.1 uf low frequency tantalum bypass capacitor in parallel with a 0.01 uf high-frequency ceramic capacitor is recommended. 2 figure 1 defines these parameters. figure 2 illustrates the equiva- lent five-gate mttl load and operating conditions under which these parameters are specified. 3 symmetry is defined as (on time/period), with vs = 1.4 v for ttl or vs = 2.5 v for cmos. per figure 1. supply voltage (5v or 3.3v) v dd 0.9*v dd 1.1*v dd v supply current (frequency dependent) i dd see figures 7,8 ma outputvoltage levels (v dd = 4.5v): output logic high 2 v oh 0.8*v dd -v output logic low 2 v ol - 0.1*v dd v transition times 2 : rise time t r 5ns fall time t f 5ns symmetry or duty cycle 3 sym see figure 3, 4 % nominal output frequency (see ordering info) f o 1.024 77.760 mhz control voltage (5v), test conditions for apr v c 0.5 4.5 v control voltage (3.3v), test conditions for apr v c 0.3 3.0 v control voltage v c 0v dd v absolute pull range (see ordering info) apr ?0 to ?00 leakage current of control input i vcxo -1.0 1.0 ua control voltage bandwidth (-3 db,v c =2.50v) bw 10 - khz parameter symbol min max unit 2
v-type voltage controlled crystal oscillator (vcxo) vectron international ?166 glover avenue, norwalk, ct 06856 ?tel: 1-88-vectron-1 ?fax: 1-888-fax-vectron electrical specifications figure 1. output waveform *includes probe and test jig capacitance figure 2. output test conditions (t amb = 25 ??) characteristic curves 3 table 3: typical single-side band phase noise data (dbc/hz) offset from carrier vcxo center frequency 6.176mhz 12.288mhz 19.440mhz 32.768mhz 39.3216mhz 44.736mhz 51.840mhz 10 hz -80 -70 -70 -68 -63 -63 -63 100 hz -109 -100 -100 -98 -93 -93 -93 1 khz -134 -129 -129 -125 -122 -122 -122 10 khz -147 -145 -145 -147 -144 -144 -144 100 khz -152 -152 -152 -152 -151 -151 -151
v-type voltage controlled crystal oscillator (vcxo) vectron international ?166 glover avenue, norwalk, ct 06856 ?tel: 1-88-vectron-1 ?fax: 1-888-fax-vectron characteristic curves (continued) 4
v-type voltage controlled crystal oscillator (vcxo) vectron international ?166 glover avenue, norwalk, ct 06856 ?tel: 1-88-vectron-1 ?fax: 1-888-fax-vectron table 4. absolute pull range (apr) absolute frequency pull range: apr - - ppm from f o control voltage, v c = 0.50v for 5v - -apr - ppm from f o control voltage, v c = 4.50v for 5v - +apr - ppm from f o control voltage, v c = 0.30v for 3.3v - -apr - ppm from f o control voltage, v c = 3.00v for 3.3v - +apr - ppm from f o parameter symbol min max unit absolute pull range (apr) is specified by the fourth character of the product code (seetable 5). the apr is the minimum guaranteed fre- quency shift from f o over variations in temperature, aging, power sup- ply, and load. both frequency and environment limit the specified apr. with vc between 0.5 v and 4.5 v, total pull range for the v-type vcxo is typically between 200 ppm and 400 ppm. a 50 ppm apr v-type vcxo will fully track a 50 ppm source oscillator or other 50 ppm reference under all specified environmental conditions. mechanical shock mil-std-883c, 2002.3 b mechanical vibration mil-std-883c, 2007.1 a lead solderability mil-std-883c, 2003.5 gross leak mil-std-883c, 1014.7 fine leak mil-std-883c, 1014.7 storagetemperature -55 ? to 125 ? 5 parameter conditions table 5. mechanical and environmental compliance oscillator aging quartz stabilized oscillators typically exhibit a change in out- put frequency with age. the major factors that contribute to this change are variations in the mechanical stress applied to the quartz crystal and mass-loading of foreign material upon the quartz crystal. as the oscillator ages, relaxation of the crystal s mounting stress can lead to frequency variation. in some oscillator products, additional variations may be brought about by the transfer of external environmental stress through the device package and crystal mounting arrangement. vi has mini- mized these two effects through the use of a state-of-the-art miniature at-cut rectangular resonator. this crystal allows a mounting arrangement that results in minimal relaxation and very little environmental stress transfer. mass-loading of the quartz resonator, which generally drives the frequency lower, is a result of outgassing of materials within a hermetic package or contamination from external materials in a less than hermetic device. in general, higher fre- quency resonators are more susceptible to this aging mecha- nism. vi has minimized the v-type s sensitivity to these effects by ensuring the hermetic integrity of the package design and by minimizing the parts count in the device. by using monolith- ic ic technology, the component count is reduced and the amount of material likely to outgas is minimized. under normal operating conditions with an operating tem- perature of 40?, the v-type vcxo will typically exhibit 2ppm aging in its first year of operation.the device is then expected to exhibit 1ppm aging the following year and will continue a logarithmic decline for each year there after.
v-type voltage controlled crystal oscillator (vcxo) vectron international ?166 glover avenue, norwalk, ct 06856 ?tel: 1-88-vectron-1 ?fax: 1-888-fax-vectron 45 6 3 2 1 .295 .006 (7.49 0.15) .200 (5.08) .100 (2.54) .200 .006 (5.08 0.15) .150 (3.81) .085 .064 2.16 1.63 .055 (1.4) .050 (1.27) r.027 (r0.7) vdugla 35.328 vi 936 0.315 0.004 (8.00 0.10) 0.157 0.004 (4.00 0.10) 0.061 0.002 (1.55 0.05) 0.079 0.004 (2.00 0.10) 0.069 0.004 (1.75 0.10) 0.295 0.004 (7.50 0.10) 0.059 0.010 (1.50 0.25) user direction of feed +0.012 -0.004 0.630 16.00 +0.30 -0.10 vdugla 35.328 vi 936 figure 15. package outline drawing figure 16. carrier tape specifications (top view with tape removed - 500 devices per reel) dimensions are in inches and (millimeters) mechanical characteristics (continued) 6
v-type voltage controlled crystal oscillator (vcxo) vectron international ?166 glover avenue, norwalk, ct 06856 ?tel: 1-88-vectron-1 ?fax: 1-888-fax-vectron ordering information 1.024 1.544 2.000 2.048 3.088 3.580 3.686 4.000 4.032 4.096 4.434 5.000 6.144 6.176 6.312 6.400 8.000 8.192 8.448 10.000 12.000 12.288 12.352 13.000 14.318 15.360 15.440 16.000 16.384 18.432 19.44 20.000 20.480 24.000 24.576 24.704 27.000 30.000 32.000 32.768 34.368 35.328 38.880 40.000 40.960 44.736 50.000 51.840 52.000 65.536 77.760 table 7: standard frequencies* (mhz) table 8: part numbering *other frequencies available upon request 1. not all combinations are possible. other specifications may be available upon request. 2. frequency: in mhz with decimal point, in hz if no decimal is present. 3. 10% linearity available at certain frequencies. consult factory. v d u g l a a : tr i - stat e pi n 5 , 45 /5 5 % sy m m etr y d : tr i - s tat e on p in 2 , 45 / 55 % s y m m e t ry t emperature ran g e c: 0 to 70? l: -40 to 85? absolute pull range g: ?0ppm n: ?0ppm h: ?00ppm p a c k a g e si z e v: 6 pin ceramic lcc supply voltage c: 5.0v (?0%) d: 3.3v (?0%) oscillator type u: vcxo l: linear 3 vcxo at mhz frequency 35.328 7 table 6. esd threshold voltage handling precautions human body model 1500* v charged device model 1500 v although protection circuitry has been designed into this device, proper precautions should be taken to avoid exposure to electrostatic discharge (esd) during handling and mounting. vi employs a human-body model (hbm) and a charged-device model (cdm) for esd-susceptibility testing and protection design evalu- ation. esd voltage thresholds are dependent on the circuit parameters used to define the mode. although no industry-wide standard has been adopted for the cdm, a standard hbm (resistance = 1500 ? , capaci- tance = 100 pf) is widely used and, therefore, can be used for comparison purposes. the hbm esd thresh- old presented here was obtained by using these circuit parameters. model esd threshold, minimum units * mil-std-883d, method 3015, class 1
usa: vectron international ?166 glover avenue, norwalk, ct 06856 . . . . tel: 1-88-vectron-1 ?fax: 1-888-fax-vectron europe: in denmark, finland, ireland, israel, norway, spain, uk . . . . . . . tel: 44 (0) 1703 766 288 ?fax: 44 (0) 1703 766 822 in austria, belgium, france, germany, italy, luxembourg netherlands, sweden, switzerland, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . tel: 49 (0) 72 63 6480 ?fax: 49 (0) 72 63 6196 asia: in china, taiwan, japan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . tel: 603-598-0070 ?fax: 603-598-0075 in korea, singapore, australia, india . . . . . . . . . . . . . . . . . . . . . . . . . . . . . tel: 203-853-4433 ?fax: 203-849-1423 vectron international reserves the right to make changes to the product(s) and/or information contained herein without notice. no liability is assumed as a result of their use or application. no rights under any patent accompany the sale of any such product(s) or information. re vis ed 7 /26/00 www.vectron.com visit our website at www.vectron.com one one for additional information please contact: ultra-miniature vcxo tru-050 pll tru-2500 4 pin dip ocxo stratum 2 double oven ocxo s surface mount ocxo s source contact vectron vectron products what s new about vectron what s hot! search jobs @vi v-type voltage controlled crystal oscillator (vcxo) 8
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