1 st1308 series 3.3v cmos ultra low jitter, high frequency voltage controlled crystal oscillator (vcxo) ds 244 rev b | 01/05/05 pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. product features ? frequencies available between 38.88 and 125 mhz ? high frequency fundamental-mode crystal ? no internal pll or frequency multiplication ? less than 0.5 ps rms jitter ? lvcmos compatible output ? commercial and industrial operation ? 20 ppm stability (or as specified) ? 50 ppm absolute (net) pull range ? 9x14mm true smt design product description the st1308 is a voltage controlled crystal oscillator that achieves superb jitter and temperature stability over a broad range of operating conditions and frequencies. the device is constructed with a hermetically sealed, fundamental-mode quartz crystal resonator exhibiting a high-q for exceptional phase noise performance. the device, available on tape and reel, is contained in a 9x14mm leadless fr4 package. applications the st1308 series vcxo is an ideal component in phase locked loop circuits that perform clock smoothing, clock/data recovery, or frequency translation and card synchronization functions, supporting jitter-sensitive applications such as: ? smpte-compliant video networking ? sonet/sdh timing control and line cards ? gigabit ethernet and fibrechannel ? satellite and microwave communications ? server & storage platforms common frequencies 38.8800 51.8400 54.0000 62.5000 65.5360 74.1758 74.2500 75.0000 77.7600 100.0000 106.2500 108.0000 125.0000 pad 1 2 3 pad 6 5 4 stability tolerance aa = 20ppm, 0 to +70c a = 25ppm, 0 to +70c b = 50 ppm, 0 to +70c e = 50 ppm, -40 to +85c g = 50 ppm, 0 to +85c saronix model frequency (mhz) pullability (minimum apr) a = 50 ppm linearity b = 10% packaging blank = bulk packaged (t) = tape & reel* *full reel increments only (500pcs) ordering information full mechanical drawings page 6. dimensions are in mm/inches. package outline actual size = 9 x 14mm pin functions pad function 1 control voltage 2 output enable/disable 3 ground 4 output 5 no connect 6 supply voltage
2 ds 244 rev b | 01/05/05 st1308 series 3.3v cmos ultra low jitter, high frequency voltage controlled crystal oscillator (vcxo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. frequency modulation function parameter min. typ. max. units notes absolute pull range (apr) 50 ppm see #1 below control voltage range 0.3 3.0 v dc as rated center control voltage 1.32 1.65 1.98 v for rmt center frequency monotonic linearity 10 % positive transfer slope input impedance 50 k control voltage pin modulation bandwidth 10 khz -3db notes: 1. apr is relative to the nominal output frequency f n (as specifed); apr is inclusive (net) of frequency deviation due to stability. electrical performance parameter min. typ. max. units notes output frequency (f n ) 38.88 125 mhz as specifed supply voltage 3.135 3.3 3.465 v supply current 30 ma frequency stability 20 50 ppm see #1 below operating temperature -40 +85 c as specifed output logic 0, v ol 0.4 v i ol = 2ma max output logic 1, v oh 2.4 v i oh = -2ma max output load 20 pf duty cycle 45 55 % measured 1.4v rise and fall time 3 ns measured 10/90% jitter, phase 0.5 ps rms (1-) 12khz to 40mhz frequency band jitter, accumulated 3.5 ps rms (1-) 20,000 adjacent periods jitter, total 25 ps pk-pk 100,000 random periods phase noise -60 dbc/hz 10 hz offset phase noise -85 dbc/hz 100 hz offset phase noise -115 dbc/hz 1 khz offset phase noise -140 dbc/hz 10 khz offset phase noise -150 dbc/hz 100 khz offset notes: 1. as specifed. stability includes all combinations of operating temperature, load changes, rated input (supply) voltage changes, aging (5 years at 40c average ambient temperature), shock and vibration.
3 ds 244 rev b | 01/05/05 st1308 series 3.3v cmos ultra low jitter, high frequency voltage controlled crystal oscillator (vcxo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. output enable / disable function parameter min. typ. max. units notes input voltage, output enable 2.2 v input voltage, output high impedance 0.8 v output disable delay 100 ns internal pullup resistance 50 k typical phase noise
4 ds 244 rev b | 01/05/05 st1308 series 3.3v cmos ultra low jitter, high frequency voltage controlled crystal oscillator (vcxo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. absolute maximum ratings parameter min. typ. max. units notes storage temperature -55 +125 c control voltage range 0 v cc v typical temperature and pull characteristics test circuit out p ut control power v ma control voltage 0.01 f 20pf (incl. test poin t 1 6 2 3 4 5 m m supply probe and fixture capacitance) 150 100 50 0 -50 -100 -150 0 10 20 30 40 50 60 70 temperature (c) frequency deviation (ppm) performance over temperature vc=+1.65v vc=+0.3v vc=+3.0v
5 ds 244 rev b | 01/05/05 st1308 series 3.3v cmos ultra low jitter, high frequency voltage controlled crystal oscillator (vcxo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. output waveform v ol v oh 1.4v 10% 90% t f t r duty cycle = 100% x (t a ) / (t a + t b ) t a t b reliability test ratings this product is rated under the following test conditions: type parameter test condition mechanical shock mil-std-883, method 2002, condition b mechanical solderability mil-std-883, method 2003 mechanical terminal strength mil-std-883, method 2004, condition d 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 mil-std-202, method 210, condition i or j reflow 235 5?c preheat 183 10?c 250 4?c/sec max temperature C ?c 4?c/sec max 5 sec min 10 sec max 1 C 2 minutes time cooling 150 200 solder refow guide
6 ds 244 rev b | 01/05/05 st1308 series 3.3v cmos ultra low jitter, high frequency voltage controlled crystal oscillator (vcxo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. ordering information mechanical drawings marking line 1: saronix y y ww x (year, week, origin) marking line 2: 12m3456 (frequency) marking line 3: ? st1308xxx (pin 1, part number) stability tolerance aa = 20ppm, 0 to +70c a = 25ppm, 0 to +70c b = 50 ppm, 0 to +70c e = 50 ppm, -40 to +85c g = 50 ppm, 0 to +85c saronix model frequency (mhz) pullability (minimum apr) a = 50 ppm linearity b = 10% packaging blank = bulk packaged (t) = tape & reel* *full reel increments only (500pcs) scale: none. dimensions are in mm/inches. recommended land pattern* *external high-frequency power decoupling is recommended ** exact location of items may vary
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