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
Differential Positive ECL (DPECL)
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 range18.0MHz 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
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
Electrical Connection
Pin Connection
1 Output Complement
2 V
EE
/Ground
3 Output
4 V
CC
CRYSTAL CLOCK OSCILLATORS
Data Sheet 9938A
Rev. L
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
SJ-A2870 Series
Continued
Differential Positive ECL (DPECL)
Operating Conditions and Output Characteristics
Electrical Characteristics
Parameter
Symbol
Conditions
Min
Typical
Max
Frequency
-----
-----
18.0MHz -----
250.0MHz
Duty Cycle -----
@ V
CC
-1.29V
45/55% -----
55/45%
Logic 0
(2)
V
OL
-----
1.35V
-----
1.70V
Logic 1
(2)
V
OH
-----
2.28V
-----
2.56V
Rise & Fall Time
tr,tf 20-80%V
O
with 50 ohm load to V
CC
-2V ----- 1.0 ns
1.5 ns
Tpd
(4)
-----
-----
-0.5 ns
-----
+0.5 ns
Jitter, RMS
(3)
-----
-----
-----
-----
3 psec
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
-----
3.15V 3.3V
3.45V
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
------
0C -----
70C
Storage temperature
T
S
----- -55C -----
125C
Power Dissipation
P
D
-----
-----
-----
276 mW
Lead temperature
T
L
Soldering, 10 sec. ----- -----
300C
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-833, Method 1011, Condition A
Vibration
0.060" double amplitude 10 Hz to 55 Hz, 35g's 55Hz to 2000 Hz
Soldering Condition
300C for 10 seconds
Hermetic Seal
Leak rate less than 1 x 10
-8
atm.cc/sec of helium
ESD Sensitivity
Human Body Model per ON Semiconductor 10kH series ECL: 500V min
.
Footnotes:
1) Standard frequency stability (20,25,50ppm & others available)
2) V
OL
, V
OH
, referenced to ground (V
EE
) with V
CC
= 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 V
CC
-1.29V and rising edge of pin 1 at V
CC
-1.29V.
Rev. L
CRYSTAL CLOCK OSCILLATORS
SJ - A287X - FREQ
Package Code
Tolerance/Performance
SJ 4 J Lead SMD
0 100ppm 0-70C
1 50ppm 0-70C
7 25ppm 0-70C
Input Voltage
9 Customer Specific
Code Specification
A 20ppm 0-70C
A 3.3V
B 50ppm -40 to +85C
5V
C 100ppm -40 to +85C
Creating a Part Number
Data Sheet 9938A
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