euro quartz euroquartz limited blacknell lane crewkerne somerset uk ta18 7he tel: +44 (0)1460 230000 fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk tcxo description specification product series code: em42t frequency range: 1.6mhz to 156.0mhz output waveform: square wave (hcmos) mechanical frequency tuning: 3ppm standard frequencies: 9.6, 10.0, 12.80, 13.0, 14.40, 15.36, 16.384, 19.200, 19.44 and 19.68mhz. ( partial list ) operating temperature range: see table frequency stability vs. ageing: 1.0 ppm max. first year vs. voltage change: 0.3 ppm max. 5% change vs. load change: 0.3 ppm max. 10% change vs. reflow: 1ppm max. for one reflow (measured after 24 hours) supply voltage: +2.8 vdc (code ?28?) +3.0 vdc (code ?3?) +3.3 vdc (code ?33?) +5.0 vdc (code ?5?) output voltage levels logic ?1? high: 80% vdd min. logic ?0? low: 10% vdd max. rise & fall times: 10ns max. (20%~80%) duty cycle (symmetry): 50%10% (at 50%vdd) start-up time: 10ms max. current consumption: 30ma max. (freq. dependent) output load: 15pf ssb phase noise: see table output format: ac block, dc coupled storage temperature: -50 to +100c em42t - outlines and dimensions frequency stability (ppm) 0.5 1.0 1.5 2.0 2.5 temperature range (c) 0 ~ +50 -10 ~ +60 ask -20 ~ +70 x -30 ~ +75 x -40 ~ +85 x = available, x = not available, ask = call technical sales frequency stability em42t - test circuit ssb phase noise at 25c offset (hz) 10 100 1k 10k 100k em42t 100mhz (dbc/hz) -72 -110 -125 -132 -125 em42t - part numbering procedure example: em42t3-19.44-2.5/-30+75 series description supply voltage 28 = 2.8 vdc 3 = 3.0 vdc 33 = 3.3 vdc 5 = 5.0 vdc frequency stability over otr (ppm) operating temperature range (otr) (c) = standard specification phase noise (example: em42t at 10.0mhz) smd package 11.4 x 9.6 x 2.5mm wide frequency range: 1.6mhz to 156mhz close tolerance stabilities from 0.5ppm over 0 to +50c 1ppm over -40 to +85c available supply voltage 2.8 volts to 5.0 volts hcmos 11.4 x 9.6 x 2.5mm smd em42t series em42 series tcxos are packaged in the industry-standard 11.4 x 9.6 x 4.7mm package. close tolerances are available from 0.5ppm over 0 to 50c or 1ppm over -40 to +85c. supply voltage may be specified over the range 2.8 to 5.0 volts.
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