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 euro quartz at-cut crystal - square wave - 12.0 volts description oc14t12a series oven-controlled crystal oscillators are intended for stratum 2 applications requiring low jitter and tight stability <0.6ppm overall frequency tolerance over 15 years. for high stability stratum 2 applications low jitter <0.6ppm overall frequency tolerance over 15 years full size 14 pin dual-in-line package supply voltage 12 volts at-cut crystal efc (voltage control) as standard outline & dimensions specification ocxo - oc14t12a crystal cut: at-cut output waveform: square wave supply voltage: +12.0 vdc 0.5v frequency range: 1.25mhz to 100.0mhz initial calibration tolerance: 0.5ppm maximum frequency stability over 0 to +60c: 0.2ppm typical 0.05ppm available over -20 to +70c: 0.3ppm typical 0.1 available over -40 to +85c: 0.5ppm typical 0.2ppm available vs. voltage change: <0.1ppm for 0.5v change vs. ageing: 0.7ppm first year <4ppm over 10 years vs. load change: <0.01ppm for 5% change warm-up time: 3 minutes maximum voltage control control voltage centre: +2.5 volts (v con ) freq. deviation range: 4.0ppm min., ref. to 25c control voltage range: 0v to +5.0volts transfer function: positive: increasing control voltage increases output frequency. input impedance: 47k minimum efc linearity: 10% maximum power dissipation: 1.0w max. at steady state 2.0w max. at turn on output load: 10 ls or 47pf output logic high: +2.8v minimum output logic low: 0.4v maximum duty cycle: 50%10% rise/fall time: 7ns max (20%~80%) frequency dependant envionmental storage temperature: -65 to +125c shock: 2000g, 0.3ms ? sine vibration: 10 ~2000hz / 10g offset dbc/hz 1hz -60 10hz -90 100hz -120 1khz -130 10khz -140 phase noise (at 10mhz) test circuit part number format example: oc14gt12a-10.000-0.10/-20+70 ocxo package: oc14 rohs compliance g: rohs compliant blank: non-compliant t: output squarewave 12: supply voltage 12volts a: at-cut crystal nominal frequency 10.0mhz stability in ppm operating temperature range c lowest temperature/highest temperature 1.25mhz ~ 100.0mhz
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