CRYSTAL CLOCK OSCILLATORS
Data Sheet 0306A
Rev. U
Differential Positive ECL (DPECL)
SD-B2980 Series
Description
The
SD-B2980 Series
of quartz crystal oscillators provide DPECL compatible signals. Systems designers
may now specify space-saving, cost-effective packaged PECL oscillators to meet their timing requirements.
Features
• Wide frequency range–60.0MHz to 312.5MHz
• User specified tolerance available
• Space-saving alternative to discrete component
oscillators
• High shock resistance, to 1000g
• 2.5 volt operation
• Overtone technology
• COTS/Dual use
• High Reliability - NEL HALT/HASS qualified for
crystal oscillator start-up conditions
• Wavecrest jitter characterization available
• High Q Crystal actively tuned oscillator circuit
• No internal PLL avoids cascading PLL problems
• Power supply decoupling internal
• Metal lid electrically connected to ground to
reduce EMI
• Gold plated pads
• RoHS Compliant, Lead Free Construction
Electrical Connection
Pin
1
2
3
4
5
6
Connection
Enable/Disable
N.C.
V
EE
/Ground
Output
/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
SD-B2980 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
T
PD(6)
Jitter, Integrated
Jitter, Wavecrest
Characterized
(3)
Phase Noise
Symbol
Conditions
Min
-----
-----
60.0MHz
45/55%
-----
@ V
CC
-1.29V
V
OL
-----
-----
V
OH
-----
V
CC
-1.025V
tr,tf 20-80%V
O
with 50 ohm load to V
CC
-2V -----
-----
-----
-200 psec
J
Integrated from phase noise,
-----
12kHz to 20MHz, RMS
-----
Random Period
Accum, pk-to-pk
125MHz
@ 10Hz
@100Hz
@1kHz
@10kHz
@100kHz
@ >1Mhz
with V
EE
= 0V
with V
EE
= 0V
Overall conditions including:
voltage, calibration, temp.,
10 yr aging, shock, vibration
-----
-----
-----
-----
-----
-----
-----
-----
1.6V
-----
-100ppm
Data Sheet 0306A
Rev. U
Typical
-----
-----
-----
-----
-----
-----
0.1 ps
2.3ps
29ps
-70 dBc/Hz
-102 dBc/Hz
-135 dBc/Hz
-145 dBc/Hz
-145 dBc/Hz
-145 dBc/Hz
-----
-----
-----
Max
312.5MHz
55/45%
V
CC
-1.62V
-----
700 psec
+200 psec
-----
-----
-----
-----
-----
-----
-----
-----
-----
-----
0.4V
+100ppm
£(Δf)
Enable Voltage
(4)
Disable Voltage
Frequency Stability
(1)
-----
-----
dF/F
General Characteristics
Parameter
Supply Voltage
(5)
Supply Current
Output current
Operating temperature
Storage temperature
Power Dissipation
Load
Start-up time
Mechanical Shock
Thermal Shock
Vibration
Hermetic Seal
Footnotes:
1) Standard frequency stability (±20,±25,±50ppm & others available)
2) V
OL
, V
OH
, referenced to ground (V
EE
) with V
CC
= 2.5V
3) Jitter performance is frequency dependent. Please contact factory
for full Wavecrest characterization.
4) Open to enable pin also enables the output.
5) Internal high frequency power source decoupling.
6) Tpd is phase shift between the falling edge of pin 4 at 2.0V and
the rising edge of pin 5 at 2.01V.
Conditions
Min
-----
2.375V
50 ohm termination
0.0 mA
To 2.00V below V
CC
I
O
Low level Output Current 0.0 mA
------
0°C
T
A
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
80 mA
±50.0 mA
70°C
125°C
210 mW
10 ms
Environmental and Mechanical Characteristics
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
Creating a Part Number
SD - B298X - 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
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
京公网安备 11010802033920号
EEWORLD
