1 s1644 series 2.5v cmos low jitter crystal clock oscillator (xo) ds 271 rev 01 | 01-12-06 pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. product features ? very low jitter with non-pll clock circuit ? 2.5v cmos compatible logic levels ? pin-compatible with standard 3.2x2.5mm packages ? designed for standard reflow and washing techniques ? low power standby mode ? pb-free and rohs/green compliant product description the s1644 series is a 2.5v crystal clock oscillator that achieves superb stability and low power consumption over a broad range of operating conditions and frequencies. the low jitter output clock signal, generated internally with a non-pll oscillator design, is compatible with lvcmos logic levels. the device, available on tape and reel, is contained in a 3.2x2.5mm surface-mount ceramic package. applications the s1644 series is an ideal reference clock for compact, high-density applications requiring low power or tight stability, including: ? network adapter cards ? portable multimedia devices ? hard disk drives ? gps/navigation ? bluetooth ? 802.11a/b/g wifi common frequencies contact saronix for additional frequencies 1.8432 mhz 3.072 mhz 3.6864 mhz 10.0000 mhz 12.0000 mhz 12.2880 mhz 13.0000 mhz 13.5000 mhz 14.7456 mhz 18.4320 mhz 20.0000 mhz 24.0000 mhz 24.5760 mhz 25.0000 mhz 26.0000 mhz 27.0000 mhz 37.5000 mhz 40.0000 mhz 48.0000 mhz 50.0000 mhz 75.0000 mhz ordering information packaging outline actual size = 3.2 x 2.5mm pin functions pin function 1 oe function 2 ground 3 clock output 4 v dd * availability varies by frequency. ??????????????????? ???????????????????????????? ??????????????????????????? ??????????????????????????? ???? ?? ? ????????????? ? ? ? ???????????????? ????????????????? ?? ?? ? ? ?? ?? ???? ? ???? ? ??????? ??????? ??? ????????????????????????? ????????????????????? ??????????? ??????????????
2 ds 271 rev 01 | 01-12-06 s1644 series 2.5v cmos low jitter 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 1.8432 80 mhz as specifed supply voltage +2.375 +2.5 +2.625 v supply current, output enabled 8 ma 1.8432 to 50 mhz 15 >50 mhz supply current, standby mode 10 a output hi-z frequency stability 25 to 50 ppm see note 1 below operating temperature -40 +85 c as specifed output logic 0, vol 10% v dd v i ol = 6ma min output logic 1, voh 90% v dd v i oh = -6ma max output load 15 pf duty cycle 45 55 % -40 to +85c measured 50%vdd rise and fall time 5 ns measured 10/90% of waveform note: 1. as specifed. stability includes all combinations of operating temperature, load changes, rated input (supply) voltage changes, initial calibration tolerance (25c), aging (1 year at 25c average effective ambient temperature), shock and vibration. output enable / disable function parameter min. typ. max. units notes input voltage (pin 1), output enable 0.7 v dd v or open input voltage (pin 1), output disable (low power standby) 0.3 v dd v output is hi-z internal pullup resistance 50 k output disable delay 100 ns output enable delay 10 ms
3 ds 271 rev 01 | 01-12-06 s1644 series 2.5v cmos low jitter 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 p o w e r s u p p l y o u t p u t e n a b l e / d i s a b l e f u n c t i o n 0 . 1 f o r 0 . 0 1 f t e s t p o i n t 1 2 3 4 1 5 p f ( i n c l u d i n g p r o b e a n d f i x t u r e c a p a c i t a n c e ) 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)
4 ds 271 rev 01 | 01-12-06 s1644 series 2.5v cmos low jitter crystal clock oscillator (xo) pericom semiconductor corporation ? 1-800-435-2336 ? http://www.pericom.com/saronix all specifications are subject to change without notice. refow soldering profle output waveform ? ?? ? ? ?? ? ???? ??? ??? ? ? ? ? ? ?????????????????? ? ??? ? ? ??? ?? ? ??? ? ? ? ? ? ? ? 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
5 ds 271 rev 01 | 01-12-06 s1644 series 2.5v cmos low jitter 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: s 12.345 (saronix, frequency code) y ww x 4 x (pin 1, year, week, origin, model, stability) 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.
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