quartz euroquartz limited blacknell lane crewkerne somerset uk ta18 7he tel: +44 1460 230000 fax: +44 1460 230001 email: info@euroquartz.co.uk web: www.euroquartz.co.uk stratum iii oscillators compact, smd package frequency range from 10mhz to 20mhz operating temperature range, -20 to +70c operable temperature -30 to +75c supply voltage 3.3 volts eqax-20 outlines and dimensions tcxo with stratum iii long-term stability option description the euroquartz eqax-20 tcxo conforms to iec60679-1, stratum 3, providing a low-noise, highly-stable and reliable source of clock signals. features specification frequency range: 9mhz to 33mhz standard frequencies: 10, 12.8, 16.384, 19.44mhz frequency stability initial tolerance: 1ppm @25c vs. temperature: 2.5ppm -40~+85c 1.5ppm -20~+70c -0.8ppm 0~+50c vs. supply voltage var: 0.2ppm vs. load change: 0.2ppm long term ageing (1st year): 1ppm (@40c) long term stab. (15 years): 4.6ppm frequency adjustment range electronic frequency control 5ppm efc voltage vc: 0.25~+4.5v (option ii = ?50? 0.30~+3.0v (option ii = ?33) efc slope: positive efc input impedance: 10k ohms absolute pull range: rf output signal waveform: hcmos load: 15pf symmetry (duty cycle): 60%/40% start-up time: 4 ms supply voltage: +5.0v5%/+3.3v5% current consumption: 25ma maximum (@25c) operable temperature range: -40~+85c storage temperature range: -40~+85c enclosure: as drawing 1 vc voltage control 2 gnd ground 4` rf out rf output 5 vs supply voltage pad no. symbol function pad connections visual inspection, dimensions sealing tests solderability, resistance to soldering heat shock bump free fall vibration, sinsoidal rapid change of temperature dry heat damp heat, cyclic cold climatic sequence damp heat, steady state endurance tests, - ageing - extended ageing 2-17 2-20 2-27 2-29 2-32 2-6 2-14 2-2 2-30 2-1 1-7 2-3 4.5 4.6 4.8.2 4.8.3 4.8.8 4.8.6 4.8.9 4.8.7 4.8.5 4.8.11 4.8.12 4.8.13 4.8.14 4.8.15 4.9.1 4.9.2 enclosure styles as in iec 60122-3, if applic. gross leak: test qc fine leak: test qk test ta (2355c), method 1 test tb, method 1a, 5s test ea, 3x per axis 100g, 6ms 1/2sine test eb, 4000 bumps/ axis, 40g, 6ms test ed, procedure 1, 2 drops from 1m ht. test fc, 30 min/axis, 10hz-55hz, 0.75mm; 55hz -2khz, 10g test na, 10 cycles at extremes of operating temperature range. test ba, 16 h at upper temperature. test db variant 1 severity b, 55c/95%rh test aa, 2h at lower temperature indicated by climatic category. sequence of 4.8.11, 4.8.12 and 4.8.13 test ca, 56 days 30 days @ 85c 1kh, 2kh, 8kh, @85c test iec 60068 part . . iec 61178-1 clause . . environmental test conditions ordering code to order, specify as follows: frequency-model-option i-option ii-option iii example: 12.800mhz eqax-20-25-50-46 option i - tolerance vs temperature 25 = 2.5ppm -40~+85c 15 = 1.5ppm -20~+70c 08 = 0.8ppm 0~+50c option ii - efc voltage 50 = 0.25v~4.75v 33 = 0.30v~3.0v option iii - long term stability 46 = 4.6ppm overall, 15 years
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