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CRYSTAL CLOCK OSCILLATORS
Differential Positive ECL (DPECL)
SN-A2970 Series
PRELIMINARY
Data Sheet 0325B
Rev. B
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 253°C
for 4 minutes maximum
• All metal, resistance weld, hermetically sealed
package
• High shock resistance, to 1500g
• Low Jitter - Wavecrest jitter characterization
available
• 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
Electrical Connection
Pin Connection
1 VEE Ground
2 VCC
7 Output
8 /Output
9 VEE Ground
10 VCC
15 VCC
16 VEE Ground
357 Beloit Street, P.O. Box 457, Burlington, WI 53105-0457 U.S.A. Phone 262/763-3591 FAX 262/763-2881
CRYSTAL CLOCK OSCILLATORS
Data Sheet 0325B
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 -----
----- -----
-----
----
-----
dF/F
with VEE=0V
with VEE=0V
Overall conditions including:
0V
3.0V
-100ppm
voltage, calibration, temp.,
10 yr aging, shock, vibration
Typical
-----
-----
-----
-----
300 psec
3 psec
-----
-----
-----
General Characteristics
Parameter
Symbol
Conditions
Min
Supply Voltage
Supply Current
VCC
ICC
Output current
IO
Operating temperature TA
Storage temperature
TS
Input: Logic High (ECL) - Disables
-----
50 ohm termination
To 2.00V below VCC
Low level Output Current
------
-----
3.135V
0.0 mA
0.0 mA
0°C
-55°C
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
Typical
3.3V
-----
-----
-----
-----
-----
2 ms
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
300°C 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.
Rev. B
Max
1.7GHz
55/45%
VCC-1.60V
VCC-0.74V
400 psec
-----
1.0V
VCC
+100ppm
Max
3.465V
300 mA
±50.0 mA
70°C
125°C
300°C
10 ms
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 0-70°C
1 ±50ppm 0-70°C
7 ±25ppm 0-70°C
9 Customer Specific
A ±20ppm 0-70°C
B ±50ppm -40 to +85°C
C ±100ppm -40 to +85°C
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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