Ultra Low Jitter PLL Crystal Oscillator 2.5 x 2.0mm NX254 2.5V/3.3V HCSL XO 2.5 x 2.0mm Ceramic SMD Package: (Scale: none; dimensions are in mm) Product Features Recommended Land Pattern: • Meet PCIe Gen2 and Gen3 clock requirements at 100MHz 2.70 1.50 0.70 • Very low phase jitter - < 1.0ps RMS max. 0.60 • Wide frequency range - 5 ~ 212.5MHz 1.11 0.57 2.25 • Industrial Temperature Range 0.35 • Low supply current - 70mA max. 0.95 • Thicker crystal for improved reliability • Pb-free & RoHS compliant • Fast lead time Pin Functions: 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. Pin Function 1 OE Function 2 N/C 3 Ground 4 Q 5 Q 6 VCC *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. Applications Part Ordering Information: UX NX70254 V • Networking systems • Servers and storage systems A Voltage: • Profession video equipments 1=+3.3V 2=+2.5V • Test and measurement • FPGA/ASIC clock generation SaRonix-eCera™ is a Pericom® Semiconductor company • I1 FFFF.FFFFFF FFFF.FFFFFF B Stability and Temp Range: Frequency: Stability Temp Range A = +/-20 ppm -20/+70°C B = +/-25 ppm -20/+70°C C = +/-50 ppm -20/+70°C D = +/-25 ppm -40/+85°C E = +/-50 ppm -40/+85°C US: +1-408-232-9100 TW: +886-3-4518888 All specifications are subject to change without notice. 15-0037 C NX254 FFFF.FFFFFF MHz, “4 digits/decimal/6 digits” format • www.pericom.com Rev A 02/05/15 1 NX254 2.5V/3.3V HCSL XO Ultra Low Jitter PLL Crystal Oscillator 2.5 x 2.0mm Electrical Performance Parameter Min. Typ. Max. Units 212.5 MHz 3.135 3.3 3.465 2.375 2.5 2.625 Output Frequency 5 Supply Voltage Supply Current, Output Enabled Notes V 70 See ordering options mA Supply Current, Output Disabled only 40 mA Frequency Stability ±50 ppm See ordering options +85 °C See ordering options 0.9 V Operating Temperature Range -40 Output Logic 0, VOL -0.15 0 Output Logic 1, VOH 0.66 0.7 Output Load V RS = 33Ω, R P = 50Ω, CL = 2pF Duty Cycle 45 Rise and Fall Time Output requires termination 55 % Measured 50% VCC 700 ps Measured from VOL = 0.175V to VOH = 0.5252V Jitter, RMS PCIe Gen2, 100 MHz 2.0 3.0 ps As defined by PCI-SIG for PCIe Gen2 Jitter, RMS PCIe Gen3, 100 MHz 0.43 1.0 ps As defined by PCI-SIG for PCIe Gen3 6 ps 20.000 adjacent periods Jitter, Accumulated , RMS (1-σ) 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 40 ps 100,000 random periods Jitter, pk-pk Notes: 1. Stability includes all combinations of operating temperature, load changes, rated input (supply) voltage changes, initial calibration tolerance (25°C), aging (1 year at 25°C average effective ambient temperature), shock and vibration. 2. Phase jitter typical value is depending on output frequencies. 3. For specifications other than those listed, please contact sales. Output Enable / Disable Function Parameter Min. Input Voltage (pin 1), Output Enable Typ. Max. Units 0.7 VCC Notes V or open 0.3 VCC V Output is Hi-Z Output Disable Delay 100 ns Output Enable Delay 100 ns Start up Time 10 ms Input Voltage (pin 1), Output Disable (low power standby) Absolute Maximum Ratings Parameter Min. Storage Temperature Typ. -55 Max. Units +125 °C Notes 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 SaRonix-eCera™ is a Pericom® Semiconductor company • US: +1-408-232-9100 TW: +886-3-4518888 All specifications are subject to change without notice. 15-0037 NX254 • www.pericom.com Rev A 02/05/15 2