1 SEL381 series 3.3v pecl high frequency crystal clock oscillator (xo) ds 225 rev c | 08/19/05 pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. product features ? very low noise at 25 mhz -110dbc/hz @ 100hz offset -130dbc/hz @ 1hz offset -145dbc/hz @ 10hz offset ? less than 3ps rms jitter ? tight stability over a broad range of operating conditions ? 3.3v pecl (lvpecl) compatible logic levels ? pin-compatible with standard 5x7mm packages ? designed for standard reflow and washing techniques ? pb-free and rohs/green compliant product description the SEL381 series is a 3.3v crystal clock oscillator that achieves superb stability over a broad range of operating conditions and frequencies. the output clock signal is compatible with lvpecl logic levels. the device, available on tape and reel, is contained in a 5x7mm surface-mount ceramic package. applications the SEL381 series is an ideal reference clock for high- speed applications including: ? 10 gigabit ethernet ? server & storage platforms ? sonet/sdh linecards ? high-speed processors ? infiniband ? 25 mhz lvpecl for gigabit ethernet common frequencies contact saronix for additional frequencies (see sel383 for 38 to 212 mhz) 25.0000 mhz 250.0000 mhz 311.0400 mhz 312.5000 mhz 350.0000 mhz 400.0000 mhz 425.0000 mhz 500.0000 mhz 622.0800 mhz 625.0000 mhz 644.5312 mhz 669.3266 mhz ordering information packaging outline actual size = 5 x 7mm pin functions pin function 1 oe or nc 2 oe or nc 3 v ee 4 q output 5 q output 6 v cc output enable/disable function 0 = n/c pin 1, n/c pin 2 1 = oe low true pin 1, n/c pin2 2 = n/c pin 1, oe low true pin2 3 = oe high true pin 1, n/c pin 2 4 = n/c pin 1, oe high true pin2 sar oni x product series s el381 3 b - 622.0800 (t) output frequency (mhz) *see sel383 series for 38 to 212 mhz frequency stabilit y aa = 20 ppm (0 to +70c) a = 25 ppm (0 to +70c ) b = 50 ppm (0 to +70c ) e = 50 ppm (-40 to +85c) h = 32 ppm (-40 to +85c) pa ck agin g (t) = t ape & r eel full reel increments blank = bulk package d
2 ds 225 rev c | 08/19/05 SEL381 series 3.3v pecl high frequency crystal clock oscillator (xo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. electrical performance parameter min. typ. max. units notes output frequency 25 670 mhz as specifed supply voltage 2.97 3.3 3.63 v supply current 85 110 ma frequency stability 20 to 50 ppm see note 1 below operating temperature -40 +85 c as specifed output logic 0, v ol v cc C 1.620 v 0 to +85c output logic 0, v ol v cc C 1.555 v -40 to 0c output logic 1, v oh v cc C 1.025 v 0 to +85c output logic 1, v oh v cc C 1.085 v -40 to 0c output load 50 to v cc C 2v output requires termination duty cycle 45 55 % measured 50% of waveform rise and fall time 850 ps measured 20/80% of waveform jitter, phase 3 ps rms (1-) 12khz to 40mhz frequency band jitter, accumulated 10 ps rms (1-) 20,000 adjacent periods jitter, total 40 ps pk-pk 100,000 random periods phase noise C110 dbc/hz 100 hz offset (25 mhz output) phase noise C130 dbc/hz 1 khz offset (25 mhz output) phase noise C145 dbc/hz 10 khz offset (25 mhz output) notes: 1. as specifed. stability includes all combinations of operating temperature, load changes, rated input (supply) voltage changes, initial calibration tolerance (25c), aging (5 years at 40c average effective ambient temperature), shock and vibration. output enable / disable function (SEL3813 and sel 3814) parameter min. typ. max. units notes input voltage (oe pin), output enable v oh v or open input voltage (oe pin), output disable v ol v outputs disabled to hi-z output enable / disable function (SEL3811 and sel 3812) parameter min. typ. max. units notes input voltage (oe pin), output enable v ol v or open input voltage (oe pin), output disable v oh v outputs disabled to hi-z
3 ds 225 rev c | 08/19/05 SEL381 series 3.3v pecl high frequency crystal clock oscillator (xo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. typical phase noise (25 mhz output) typical phase noise (622.08 mhz output)
4 ds 225 rev c | 08/19/05 SEL381 series 3.3v pecl high frequency crystal clock oscillator (xo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. typical output waveform (622.08 mhz output) typical output waveform (25 mhz output)
5 ds 225 rev c | 08/19/05 SEL381 series 3.3v pecl high frequency crystal clock oscillator (xo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. test circuit absolute maximum ratings parameter min. typ. max. units notes storage temperature -55 +125 c reliability test ratings this product is rated to meet the following test conditions: type parameter test condition mechanical shock mil-std-883, method 2002, condition b mechanical solderability jesd22-b102-d method 2 (preconditioning e) mechanical terminal strength mil-std-883, method 2004, condition d mechanical gross leak mil-std-883, method 1014, condition c mechanical fine leak mil-std-883, method 1014, condition a2 (r 1 = 2x10 -8 atm cc/s) mechanical solvent resistance mil-std-202, method 215 environmental thermal shock mil-std-883, method 1011, condition a environmental moisture resistance mil-std-883, method 1004 environmental vibration mil-std-883, method 2007, condition a environmental resistance to soldering heat j-std-020c table 5-2 pb-free devices (2 cycles max) ? ? ? ?????????????????????????????? ?????????????????????????????????????? ? ? ? ? ? ? ?? ? ?? ? ? ????????? ?? ?????????? ?????????????????? ????? ?? ? ???? ? ?????? ????? ??????
6 ds 225 rev c | 08/19/05 SEL381 series 3.3v pecl high frequency crystal clock oscillator (xo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. output waveform refow soldering profle v o l v o h 5 0 % 2 0 % 8 0 % t f t r d u t y c y c l e = 1 0 0 % x ( t a ) / ( t a + t b ) t a t b p e a k 2 6 0 c f o r 1 0 s e c m a x 2 6 0 t e m p e r a t u r e C c 1 t o 3 c / s e c m a x 6 0 t o 9 0 s e c t i m e 1 t o 3 c / s e c 2 1 7 4 t o 6 m i n u t e s m a x as per ipc/jedec j-std-020c
7 ds 225 rev c | 08/19/05 SEL381 series 3.3v pecl high frequency crystal clock oscillator (xo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. mechanical drawings marking line 1: SEL381 x (saronix, model, stability code) marking line 2: frequency (frequency code) marking line 3: y y ww x (pin 1, year, week, origin) scale: none. dimensions are in mm/inches. recommended land pattern* *external high-frequency power decoupling is recommended.(see test circuit for minimum recom - mendation). to ensure optimal performance, do not route traces beneath the package. ** exact location of markings may vary please note: in 2005, ceramic package design changed to allow pin #1 size decrease as shown. some older lot codes may be built with the prior package, in which case pin #1 is 1.4 x 1.6 mm max.
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