CRYSTAL CLOCK OSCILLATORS
Differential Positive ECL (DPECL)
Fast Edge
Data Sheet 0105C
Rev. F
SD-A2920 Series
Description
The
SD-A2920 Series
of quartz crystal oscillators provide DPECL Fast Edge compatible signals. Systems
designers may now specify space-saving, cost-effective packaged PECL oscillators to meet their timing
requirements.
Features
• Wide frequency range–75.0MHz to 250.0MHz
(Preliminary from180+MHz to 250MHz)
• 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 1000g
• 3.3 volt operation
• Metal lid electrically connected to ground to
reduce EMI
Electrical
Connection
Pin
1
2
3
4
5
6
Connection
Enable/Disable
N.C.
V
EE
/Ground
Output
/Output
V
CC
• Fast rise and fall times <600 ps
• 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
• No internal PLL avoids cascading PLL problems
• High frequencies due to proprietary design
• Gold plated pads
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
SD-A2920 Series
Continued
Differential Positive ECL (DPECL) Fast Edge
Operating Conditions and Output Characteristics
Electrical Characteristics
Parameter
Frequency
Duty Cycle
Logic 0
(2)
Logic 1
(2)
Rise & Fall Time
T
pd (4)
Jitter, RMS
(3)
Enable Voltage
(5)
Disable Voltage
Frequency Stability
(1)
Symbol
Conditions
Min
-----
-----
75.0MHz
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 -----
-----
-----
-200 psec
-----
-----
-----
-----
with V
EE
= 0V
2.0V
-----
-----
with V
EE
= 0V
dF/F
Overall conditions including:
-100ppm
voltage, calibration, temp.,
10 yr aging, shock, vibration
Data Sheet 0105C
Rev. F
Typical
-----
-----
-----
-----
-----
-----
-----
-----
-----
-----
Max
250.0MHz
55/45%
1.70V
2.56V
600 psec
+200 psec
3 psec
-----
0.8V
+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
T
S
-----
-55°C
-----
-----
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
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 (V
EE
) with V
CC
= 3.3V
3) Jitter performance is frequency dependent. Please contact factory for full Wavecrest characterization.
4) Tpd is phse shift between the falling edge of pin 4 at 2.0V and the rising edge of pin 5 at 2.01V.
5) Open to enable pin also enables the output.
Creating a Part Number
SD - A292X - FREQ
Package Code
SD 6 pad 5x7mm 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
Microcontroller MCU
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