CRYSTAL CLOCK OSCILLATORS
Differential Positive ECL (DPECL)
Data Sheet 0225A
Rev. F
SJ-B2870 Series
Description
The
SJ-B2870 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–50.0MHz to 100.0MHz
• 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
• MECL 10K and 10KH series compatible output on
Pin 3, complement on Pin 1
• COTS/Dual use
• 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
• RoHS Compliant, Lead Free Construction
(unless solder dipped leads are supplied)
Electrical Connection
Pin
1
2
3
4
Connection
Output Complement
V
EE
/Ground
Output
V
CC
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-B2870 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
-----
-----
50.0MHz
-----
@ V
CC
-1.29V
45/55%
V
OL
-----
V
CC
-1.95V
V
OH
-----
V
CC
-1.12V
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 0225A
Rev. F
Typical
-----
-----
-----
-----
1.0 ns
-----
-----
-----
Max
100.0MHz
55/45%
V
CC
-1.50V
V
CC
-0.74V
2.0 ns
+0.5 ns
3 psec
+100ppm
General Characteristics
Parameter
Supply Voltage
Supply Current
Output current
Operating temperature
Storage temperature
Power Dissipation
Load
Start-up time
Conditions
Min
2.5V±5%
2.375V
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
T
S
-----
-55°C
P
D
-----
-----
50 Ohm to V
CC
-2V or Thevenin Equivalent, Bias Required
-----
-----
t
S
Symbol
V
CC
I
CC
Typical
2.5V
-----
-----
-----
-----
-----
2 ms
Max
2.625V
50 mA
±50.0 mA
70°C
125°C
131 mW
10 ms
Environmental and Mechanical Characteristics
Mechanical Shock
Thermal Shock
Vibration
Hermetic Seal
ESD Sensitivity
Per MIL-STD-202, Method 213, Condition E
Per MIL-STD-883, Method 1011, Condition A
0.060" double amplitude 10 Hz to 55 Hz, 35g’s 55Hz to 2000 Hz
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.
RMS jitter bandwidth of 12kHz to 20MHz.
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 - B287X - 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
B
2.5V
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
CRYSTAL CLOCK OSCILLATORS
SJ-B2870 Series
Continued
Data Sheet 0225A
Rev. F
Max Reflow Profile
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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