semtech approved products E3179/E3179lf gr-1244 and gr-253 core stratum 3 minature surface mount tcxo marking manufacture r s id ( r ) manufacture r s identifier ( x x x ) p ad 1 / static s ensit i vity identifier ( ? ) abbreviated p a r t number (31 79) oscillator ? s date of manufacture (yw) note: p r oduction par ts will be mark ed in this format. s ample marking may vary . environmental specification storage t emperature r ange : -55 to 1 25c. v i bration: iec 60 068-2-6 t est fc p rocedure b4, 1 0 -60hz 1 .5mm displacement, at 98.1 ms -2 , 30 minutes in eac h of three mutually perpendicular axes at 1 octave per minute. shoc k: iec 60 068-2-27 t est ea, 980ms -2 acceleration for 6ms duration, 3 shoc ks in eac h direction along three mutually perpendicular axes. s oldering: smd product suitable for con vection r eflow soldering. p eak temperature 260c. maximum time abo ve 220c, 60 secs.(compatible with lead-free soldering processes) marking: laser mark ed. r ohs/s oldering: p a r ts with the suf fix ?lf? on the par t number are fully compliant with the european union directi ve 20 02/95/ec on the restriction of the use of cer tain hazardous substances in electrical and electronic equipment. note: the r ohs compliant par ts are suitable for assembly using both l ead-free solder s (see l ead-free r eflow soldering profile) and t in / l ead solder s (see t in / l ead r eflow soldering profile). issue 4 ; 1 9 m a r c h 200 9 nominal frequency, fo 20.0mhz supply voltage 3.3v 5% input current < 6ma output t ype : hcmos l oad : 1 5pf max v ol : < 0.1 * vs v oh : > 0.9 * vs duty cycle @ 50%: 45% to 55% rise t ime, 1 0% to 90%: < 9ns f all t i me, 90% to 1 0%: < 9ns holdover stability [(f max -f min ) /2.f o ] t emperature, -5 to 80c 0.28ppm t emperature, -5 to 80c, inclusi ve of supply v oltage, 3.3v 5% and ageing 24 hour s: < 0.32ppm free-run accuracy, incl, calibration@ 25c, t emperature -5 to 80c, supply v oltage 3.3v 5%, l oad 1 5pf 5%, r eflow s oldering and ageing 20 year s: < 4.6ppm ref . to f o phase noise 1 0hz < -85dbc/hz 1 0 0hz < -1 1 0dbc/hz 1khz < - 1 25dbc/hz > 1 0khz < -1 35 dbc/hz tri-state p ad 8 open circuit or > 0.6vs: output enabled p ad 8 < 0.2vs: output in t ri-state mode when t ri-stated, the output is disabled but the oscillator and compensation circuit are still acti ve (cur rent consumption < 1ma). r x xx ? 31 79 yw private bag 99943, newmarket, auckland 1149, new zealand www .r ak on.com
semtech approved products outline in mm (scale 2 : 1) 2. 0 m a x 0. 6 7 . 0 0. 15 p a d c o nn e c t i o n s 1 . d o not co nne c t 2. n/ c 3 . d o not co nne c t 4. gnd 5 . o u t put 6. n/ c 7. n/ c 8. t r i - s t ate co n t r o l * 9. su p p l y, + v s 1 0 .d o not co nne c t , or c onn e c t t o g n d * d e c oup le wit h c a pa ci t o r 10n f c o n n ec te d to gnd 5. 0 0. 15 2. 0 5 6 7 2 1. 0 0. 20 4 9 8 3 10 1 2. 54 0. 8 2. 54 0. 6 1. 50 0 . 20 lead free reflow soldering profile * tin / lead reflow soldering profile * 100 200 300 50 t i m e ab o v e 217 c : 6 0 t o 1 50 s e c s t i m e 25 c t o p eak t e m p : 48 0 s e c m a x 3 c / se c m a x 150 c t o 20 0 c 60 t o 180 s e c o n d s p eak t e m p 260 c c 20 t o 40 s e c +0 -5 c ool dow n, 6 c / s e c m a x 100 200 300 50 t i m e ab o v e 183 c : 6 0 t o 1 50 s e c s t i m e 25 c t o p eak t e m p : 36 0 s e c m a x 3 c / se c m a x 100 c t o 15 0 c 60 t o 120 s e c o n d s p eak t e m p 240 c c 10 t o 30 s e c +0 -5 c ool dow n, 6 c / s e c m a x *note: these profiles were used during the qualification testing of the product and therefore represent wor st case conditions. they are not recommended for use by the customer in the actual assembly of these par ts private bag 99943, newmarket, auckland 1149, new zealand www .r ak on.com
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