SD-B2990 Series PRELIMINARY Description SD-B2990 Series quar
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Data Sheet 0332A Rev.
SD-B2990 Series
PRELIMINARY Description
SD-B2990 Series quartz crystal oscillators provide DPECL Fast Edge compatible signals. Systems designers specify space-saving, cost-effective packaged PECL oscillators meet their timing requirements.
Features
Wide frequency range-125.0MHz 312.5MHz User specified tolerance available Will withstand vapor phase temperatures 253°C minutes maximum Space-saving alternative discrete component oscillators High shock resistance, 1000g volt operation Metal electrically connected ground reduce Fast rise fall times <600 Electrical Connection Connection Enable/Disable N.C. /Ground Output /Output High Reliability HALT/HASS qualified crystal oscillator start-up conditions Jitter Wavecrest jitter characterization available Overtone technology High Crystal actively tuned oscillator circuit Power supply decoupling internal internal avoids cascading problems High frequencies proprietary design Gold plated pads
Beloit Street, P.O. 457, Burlington, 53105-0457 U.S.A. Phone 262/763-3591 262/763-2881 Email: nelsales@nelfc.com www.nelfc.com
SD-B2990 Series Continued Differential Positive (DPECL) Fast Edge Operating Conditions Output Characteristics
Electrical Characteristics
Parameter Frequency Duty Cycle Logic Logic 1(2) Rise Fall Time Jitter, RMS(3) Enable Voltage Disable Voltage Frequency Stability Symbol Conditions -125.0MHz 45/55% VCC-1.29V -VCC-1.95V -VCC-1.02V tr,tf 20-80%VO with load VCC-2V -200 psec -with 2.0V -with dF/F Overall conditions including: -100ppm voltage, calibration, temp., aging, shock, vibration
Data Sheet 0332A Rev.
Typical
312.5MHz 55/45% VCC-1.60V VCC-0.74V psec +200 psec psec -0.8V +100ppm
General Characteristics
Parameter Supply Voltage Supply Current Output current Operating temperature Storage temperature Power Dissipation Lead temperature Load Start-up time Conditions -2.375V termination 2.00V below level Output Current -0°C -55°C Soldering, sec. VCC-2V Thevenin Equivalent, Bias Required Symbol Typical 2.5V 2.625V ±50.0 70°C 125°C 300°C
Environmental Mechanical Characteristics
Mechanical Shock Thermal Shock Vibration Soldering Condition Hermetic Seal MIL-STD-202, Method 213, Condition MIL-STD-833, Method 1011, Condition 0.060" double amplitude 35g's 55Hz 2000 300°C seconds Leak rate less than atm.cc/sec helium
Footnotes: Standard frequency stability (±20,±25,±50ppm others available) VOL, VOH, referenced ground (VEE) with 2.5V Jitter performance frequency dependent. Please contact factory full Wavecrest characterization. phse shift between falling edge 2.0V rising edge 2.01V.
Creating Part Number B299X FREQ Package Code 5x7mm Input Voltage Code Specification 3.3V 2.5V Tolerance/Performance ±100ppm 0-70°C ±50ppm 0-70°C ±25ppm 0-70°C Customer Specific ±20ppm 0-70°C ±50ppm +85°C ±100ppm +85°C
Beloit Street, P.O. 457, Burlington, 53105-0457 U.S.A. Phone 262/763-3591 262/763-2881 Email: nelsales@nelfc.com www.nelfc.com
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