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| CRYSTAL CLOCK OSCILLATORS Differential Positive ECL (DPECL) Data Sheet 0325B Rev. B SN-A2970 Series PRELIMINARY Description The SN-A2970 Series of quartz crystal oscillators provide DPECL Fast Edge compatible signals. This device is to operate using positive voltage and uses multiple ground pins for improved signal integrity. This device is intended to operate on positive voltage for PECL applications. Features * Wide frequency range-671.0MHz to 1.7GHz * User specified tolerance available * Case at electrical ground * Will withstand vapor phase temperatures of 253C for 4 minutes maximum * All metal, resistance weld, hermetically sealed package * High shock resistance, to 1500g * Low Jitter - Wavecrest jitter characterization available Electrical Connection Pin 1 2 7 8 9 10 15 16 Connection VEE Ground VCC Output /Output VEE Ground VCC VCC VEE Ground * High Reliability - NEL HALT/HASS qualified for crystal oscillator start-up conditions * Overtone technology * High Q Crystal actively tuned oscillator circuit * Power supply decoupling internal * Dual ground plane for added stability * No internal PLL avoids cascading PLL problems * High frequencies due to proprietary design * RoHS Compliant, Lead Free Construction 357 Beloit Street, P.O. Box 457, Burlington, WI 53105-0457 U.S.A. Phone 262/763-3591 FAX 262/763-2881 Email: nelsales@nelfc.com www.nelfc.com CRYSTAL CLOCK OSCILLATORS SN-A2970 Series Continued Differential Positive ECL (DPECL) Operating Conditions and Output Characteristics Electrical Characteristics Parameter Frequency Duty Cycle Logic 0 (2) Logic 1(2) Rise & Fall Time Jitter, RMS(3) Enable Voltage(4) Disable Voltage Frequency Stability (1) Symbol Conditions Min --------671.0MHz ----@ 50% points 45/55% VOL ----VCC-1.95V VOH ----VCC-1.02V tr,tf 20-80%VO with 50 ohm load to VCC-2V -------------------with VEE=0V 0V ----with VEE=0V 3.0V dF/F Overall conditions including: -100ppm voltage, calibration, temp., 10 yr aging, shock, vibration Data Sheet 0325B Rev. B Typical ----------------300 psec 3 psec ------------- Max 1.7GHz 55/45% VCC-1.60V VCC-0.74V 400 psec ----1.0V VCC +100ppm General Characteristics Parameter Supply Voltage Supply Current Symbol VCC ICC Conditions ----50 ohm termination To 2.00V below VCC Low level Output Current ---------Min 3.135V 0.0 mA Typical 3.3V --------------------2 ms Max 3.465V 300 mA 50.0 mA 70C 125C 300C 10 ms Output current IO 0.0 mA 0C Operating temperature TA Storage temperature TS -55C Input: Logic High (ECL) - Disables VEE or Open - Enables Lead temperature TL Soldering, 10 sec. ----Load 50 Ohm to VCC-2V or Thevenin Equivalent, Bias Required --------Start-up time tS Environmental and Mechanical Characteristics Mechanical Shock Thermal Shock Vibration Soldering Condition Hermetic Seal Per MIL-STD-202, Method 213, Condition E Per MIL-STD-833, Method 1011, Condition A 0.060" double amplitude 10 Hz to 55 Hz, 35g's 55Hz to 2000 Hz 300C for 10 seconds Leak rate less than 1 x 10 -8 atm.cc/sec of helium Footnotes: 1) Standard frequency stability (20,25,50ppm & others available) 2) VOL, VOH, referenced to ground 3) Jitter performance is frequency dependent. Please contact factory for full Wavecrest characterization. RMS jitter bandwidth of 12kHz to 20MHz. 4) Open to Enable pin also enables to output. Creating a Part Number SN - A297X - FREQ Package Code HN Leaded 8 pin (16pin) SN 8 pin (16 pin) SMD Gull Wing Input Voltage Code Specification A 3.3V 5V Tolerance/Performance 0 100ppm 0-70C 1 50ppm 0-70C 7 25ppm 0-70C 9 Customer Specific A 20ppm 0-70C B 50ppm -40 to +85C C 100ppm -40 to +85C 357 Beloit Street, P.O. Box 457, Burlington, WI 53105-0457 U.S.A. Phone 262/763-3591 FAX 262/763-2881 Email: nelsales@nelfc.com www.nelfc.com |
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