ux 70 v i ffff.ffffff a b c stability temp range a = +/-20 ppm -20/+70c b = +/-25 ppm -20/+70c c = +/-50 ppm -20/+70c d = +/-25 ppm -40/+85c e = +/-50 ppm -40/+85c stability and temp range: frequency: ffff.ffffff mhz, ?4 digits/decimal/6 digits? format voltage: 1=+3.3v 2=+2.5v product features ? meet pcie gen2 and gen3 clock requirements at 100mhz ? very low phase jitter - < 1.0ps rms max. ? wide frequency range - 5 ~ 212.5mhz ? thicker crystal for improved reliability ? low supply current - 70ma max. ? industrial temperature range ? pb-free & rohs compliant ? fast lead time product description the NX254 xo series is a high performance hcsl crystal oscillator family with very low jitter performance. other than pcie clock frequencies, it also supports various options including other networking frequencies, 2.5v/3.3v voltage, and various stabilities. it is designed to meet the clock source specifications for pcie interface, sgmii of communication systems, and other high performance equipment. applications ? networking systems ? servers and storage systems ? profession video equipments ? test and measurement ? fpga/asic clock generation package: (scale: none; dimensions are in mm) pin functions: pin function 1 oe function 2 n/c 3 ground 4 q 5 q 6 v cc recommended land pattern: 2.5 x 2.0mm ceramic smd *extended high frequency power decoupling is recommended (see test circuit for minimum recommendation). to ensure optimal performance, do not route rf traces beneath the package. 1 nx 254 v 1 ffff.ffffff part ordering information: 0.95 2.25 0.57 0.35 2.70 0.60 1.50 0.70 1.11 saronix-ecera? is a pericom? semiconductor company ? us: +1-408-232-9100 tw: +886-3-4518888 ? www.pericom.com all specifications are subject to change without notice. NX254 rev a 02/05/15 15-0037 2.5v/3.3v hcsl xo ultra low jitter pll crystal oscillator 2.5 x 2.0mm NX254
output enable / disable function parameter min. typ. max. units notes input voltage (pin 1), output enable 0.7 v cc v or open input voltage (pin 1), output disable (low power standby) 0.3 v cc v output is hi-z output disable delay 100 ns output enable delay 100 ns start up time 10 ms absolute maximum ratings parameter min. typ. max. units notes storage temperature -55 +125 c for the latest product information visit: http://www.pericom.com/products/crystals-and-crystal-oscillators/hiflex-xo/?part=NX254 for test circuit go to : http://www.pericom.com/pdf/sre/tc-hcsl.pdf for soldering reflow profile and reliability test ratings go to: http://www.pericom.com/pdf/sre/reflow.pdf for tape and reel information go to: http://www.pericom.com/pdf/sre/tr_2520_xo.pdf 2 electrical performance parameter min. typ. max. units notes output frequency 5 212.5 mhz supply voltage 3.135 3.3 3.465 v see ordering options 2.375 2.5 2.625 supply current, output enabled 70 ma supply current, output disabled only 40 ma frequency stability 50 ppm see ordering options operating temperature range -40 +85 c see ordering options output logic 0, v ol -0.15 0 v output logic 1, v oh 0.66 0.7 0.9 v output load r s = 33, r p = 50, c l = 2pf output requires termination duty cycle 45 55 % measured 50% v cc rise and fall time 700 ps measured from v ol = 0.175v to v oh = 0.5252v jitter, rms pcie gen2, 100 mhz 2.0 3.0 ps as defned by pci-sig for pcie gen2 jitter, rms pcie gen3, 100 mhz 0.43 1.0 ps as defned by pci-sig for pcie gen3 jitter, accumulated , rms (1-) 6 ps 20.000 adjacent periods jitter, phase, rms < 40mhz 0.4 1 ps 12khz to 5 mhz frequency band 40 to 212.5mhz 0.4 1 ps 12khz to 20 mhz frequency band 100mhz, 125mhz 0.4 0.6 ps 12khz to 20 mhz frequency band jitter, pk-pk 40 ps 100,000 random periods notes: 1. 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. 2. phase jitter typical value is depending on output frequencies. 3. for specifcations other than those listed, please contact sales. saronix-ecera? is a pericom? semiconductor company ? us: +1-408-232-9100 tw: +886-3-4518888 ? www.pericom.com all specifications are subject to change without notice. NX254 rev a 02/05/15 15-0037 2.5v/3.3v hcsl xo NX254 ultra low jitter pll crystal oscillator 2.5 x 2.0mm
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