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CRYSTAL CLOCK OSCILLATORS
Differential Positive ECL (DPECL)
Data Sheet 9938A Rev. L
SJ-A2870 Series
Description
The SJ-A2870 Series of quartz crystal oscillators provide MECL 10K and 10KH series compatible signals in a ceramic SMD package. Systems designers may now specify space-saving, cost-effective packaged PECL oscillators to meet their timing requirements.
Features
* Wide frequency range-18.0MHz to 250.0MHz * User specified tolerance available * Will withstand vapor phase temperatures of 253C for 4 minutes maximum * Space-saving alternative to discrete component oscillators * High shock resistance, to 3000g * 3.3 volt operation * Metal lid electrically connected to ground to reduce EMI * MECL 10K and 10KH series compatible output on Pin 3, complement on Pin 1 Electrical Connection Pin 1 2 3 4 Connection Output Complement VEE /Ground Output VCC * Low Jitter - Wavecrest jitter characterization available * High Reliability - NEL HALT/HASS qualified for crystal oscillator start-up conditions * High Q Crystal actively tuned oscillator circuit * Power supply decoupling internal * No internal PLL avoids cascading PLL problems * High frequencies due to proprietary design * Gold plated leads - Solder dipped leads available upon request
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
SJ-A2870 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 Tpd (4) Jitter, RMS(3) Frequency Stability (1) Symbol Conditions Min --------18.0MHz 45/55% ----@ VCC-1.29V VOL ----1.35V VOH ----2.28V tr,tf 20-80%VO with 50 ohm load to VCC-2V -------------0.5 ns ------------dF/F Overall conditions including: -100ppm voltage, calibration, temp., 10 yr aging, shock, vibration
Data Sheet 9938A Rev. L
Typical ----------------1.0 ns -------------
Max 250.0MHz 55/45% 1.70V 2.56V 1.5 ns +0.5 ns 3 psec +100ppm
General Characteristics
Parameter Supply Voltage Supply Current Output current Operating temperature Storage temperature Power Dissipation Lead temperature Load Start-up time Conditions Min ----3.15V 50 ohm termination 0.0 mA To 2.00V below VCC IO Low level Output Current 0.0 mA TA -----0C -----55C TS PD --------TL Soldering, 10 sec. ----50 Ohm to VCC-2V or Thevenin Equivalent, Bias Required tS --------Symbol VCC ICC Typical 3.3V ------------------------2 ms Max 3.45V 80 mA 50.0 mA 70C 125C 276 mW 300C 10 ms
Environmental and Mechanical Characteristics
Mechanical Shock Thermal Shock Vibration Soldering Condition Hermetic Seal ESD Sensitivity 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 Human Body Model per ON Semiconductor 10kH series ECL: 500V min.
Footnotes: 1) Standard frequency stability (20,25,50ppm & others available) 2) VOL, VOH, referenced to ground (VEE) with VCC = 3.3V 3) Jitter performance is frequency dependent. Please contact factory for full Wavecrest characterization. 4) Tpd is phase shift between the falling edge of pin 3 at VCC-1.29V and rising edge of pin 1 at VCC-1.29V.
Creating a Part Number SJ - A287X - FREQ Package Code SJ 4 J Lead SMD 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
Input Voltage Code Specification A 3.3V 5V
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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