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 253°C
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
V
EE
/Ground
Output
V
CC
• 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%
-----
@ V
CC
-1.29V
V
OL
-----
1.35V
V
OH
-----
2.28V
tr,tf 20-80%V
O
with 50 ohm load to V
CC
-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 V
CC
I
O
Low level Output Current 0.0 mA
T
A
------
0°C
-----
-55°C
T
S
P
D
-----
-----
T
L
Soldering, 10 sec.
-----
50 Ohm to V
CC
-2V or Thevenin Equivalent, Bias Required
t
S
-----
-----
Symbol
V
CC
I
CC
Typical
3.3V
-----
-----
-----
-----
-----
-----
2 ms
Max
3.45V
80 mA
±50.0 mA
70°C
125°C
276 mW
300°C
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
300°C 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) 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.
Creating a Part Number
SJ - A287X - FREQ
Package Code
SJ 4 J Lead SMD
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
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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