CRYSTAL CLOCK OSCILLATORS
Differential Positive ECL (DPECL)
Data Sheet 0012F
Rev. C
SK-2900 Series
Description
The
SK-2900 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–250.0MHz to 500.0MHz
• 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
• 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
Electrical Connection
Pin
1
2
6
7
8
9
13
14
Connection
V
CC
V
EE
Case
V
EE
Case
Output
/Output
V
EE
Case
V
EE
Case
Enable/Disable
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
SK-2900 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
-----
-----
250.0MHz
-----
@ 50% points
45/55%
V
OL
-----
V
CC
-1.95V
V
OH
-----
V
CC
-1.02V
tr,tf 20-80%V
O
with 50 ohm load to V
CC
-2V -----
-----
-----
-----
----
with V
EE
=0V
0V
-----
with V
EE
=0V
3.0V
dF/F
Overall conditions including:
-100ppm
voltage, calibration, temp.,
10 yr aging, shock, vibration
Data Sheet 0012F
Rev. C
Typical
-----
-----
-----
-----
350 psec
-----
-----
-----
-----
Max
500.0MHz
55/45%
V
CC
-1.60V
V
CC
-0.74V
600 psec
5 psec
1.0V
V
CC
+100ppm
General Characteristics
Parameter
Supply Voltage
Supply Current
Symbol
V
CC
I
CC
Conditions
-----
50 ohm termination
To 2.00V below V
CC
Low level Output Current
------
-----
Min
4.75V
0.0 mA
Typical
5.0V
-----
-----
-----
-----
-----
2 ms
Max
5.25V
120 mA
±50.0 mA
70°C
125°C
300°C
10 ms
Output current
I
O
0.0 mA
0°C
Operating temperature
T
A
Storage temperature
T
S
-55°C
Input: Logic High (ECL) - Disables
V
EE
or Open - Enables
Lead temperature
T
L
Soldering, 10 sec.
-----
Load
50 Ohm to V
CC
-2V or Thevenin Equivalent, Bias Required
-----
-----
Start-up time
t
S
Environmental and Mechanical Characteristics
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) V
OL
, V
OH
, referenced to ground
3) Jitter performance is frequency dependent. Please contact factory for full characterization.
4) Open to Enable pin also enables to output.
Creating a Part Number
SK - A290X - FREQ
Package Code
HK Leaded 8 pin (14pin)
SK 8 pin (14 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
Email:
nelsales@nelfc.com
www.nelfc.com
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