357 Beloit Street, P.O. Box 457, Burlington, WI 53105-0457 U.S.A. Phone 262/763-3591 FAX 262/763-2881
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Differential Positive ECL (DPECL)Fast Edge
PJ-B2980 Series
Description
The PJ-B2980 Series of quartz crystal oscillators provide DPECL Fast Edge compatible signals. Systems designers may now specify space-saving, cost-effective packaged PECL oscillators to meet their timing requirements.
Features
? Wide frequency range–60.0MHz to 312.5MHz ? User specified tolerance available
? Space-saving alternative to discrete component oscillators
? High shock resistance, to 1000g ? 2.5 volt operation
? Metal lid electrically connected to ground to reduce EMI
? High Reliability - NEL HALT/HASS qualified for crystal oscillator start-up conditions
? Low Jitter - Wavecrest jitter characterization available
? Overtone technology
? 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 pads
3 V EE 6 V CC
CRYSTAL CLOCK OSCILLATORS
Data Sheet 0350C
Rev. G
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PJ-B2980 Series Continued
Differential Positive ECL (DPECL) Fast Edge
Operating Conditions and Output Characteristics
Electrical Characteristics
Parameter Symbol Conditions Min Typical Max
Frequency
----------60.0MHz -----312.5MHz Duty Cycle ----- @ V CC -1.29V 45/55% -----55/45%Logic 0 (2)V OL ----- ----- -----V CC -1.62V Logic 1(2)
V OH ----- V CC -1.025V -----
-----Rise & Fall Time tr,tf 20-80%V O with 50 ohm load to V CC -2V ----- ----- 1 ns
T pd (4)
-----------200 psec -----+200 psec Jitter, RMS (3)
-------------------- 1 psec Enable Voltage (5)-----with V EE = 0V 1.6V ----------Disable Voltage
-----with V EE = 0V
----------0.4V
Frequency Stability (1)
dF/F Overall conditions including:-100ppm -----+100ppm
voltage, calibration, temp.,
10 yr aging, shock, vibration
General Characteristics
Parameter
Symbol
Conditions Min Typical Max Supply Voltage V CC ----- 2.375V 2.5V 2.625V Supply Current I CC
50 ohm termination 0.0 mA -----80 mA To 2.00V below V CC
Output current
I O Low level Output Current 0.0 mA -----±50.0 mA Operating temperature T A ------ 0°C
-----70°C Storage temperature T S
----- -55°C -----125°C Power Dissipation P D
---------------210 mW Solder temperature T L 4 minutes ----- -----253°C Load
50 Ohm to V CC -2V or Thevenin Equivalent, Bias Required Start-up time
t S ---------- 2 ms
10 ms
Environmental and Mechanical Characteristics
Mechanical Shock Per MIL-STD-202, Method 213, Condition E Thermal Shock Per MIL-STD-883, Method 1011, Condition A
Vibration
0.060" double amplitude 10 Hz to 55 Hz, 35g’s 55Hz to 2000 Hz Hermetic Seal
Leak rate less than 1 x 10 -8 https://www.wendangku.net/doc/20551530.html,/sec of helium
Footnotes:
1) Standard frequency stability (±20,±25,±50ppm & others available)2) V OL , V OH , referenced to ground (V EE ) with V CC = 2.5V
3) Jitter performance is frequency dependent. Please contact factory for full Wavecrest characterization. RMS jitter bandwidth of 12kHz to 20MHz.
Rev. G
CRYSTAL CLOCK OSCILLATORS
Data Sheet 0350C