CRYSTAL CLOCK OSCILLATORS
Differential Positive ECL (DPECL)
Data Sheet 0447G
Rev. M
SR-A29B0 Series
Description
The
SR-A29B0 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 1.7GHz
• Low noise analog multiplication
• High frequency output eliminates the need for PLL
multiplication
• Stabilities over temperatures as low as ±20ppm
eliminates SAW oscillator temperature problems
• 3.3V and 2.5V version available
Electrical Connection
Pin
1
2
3
4
5
6
7
8
Connection
V
CC
Ground
NC or Ground
Q Output
/Q Output
Ground
Ground
Enable
• High Reliability - NEL HALT/HASS qualified for
crystal oscillator start-up conditions
• User specified tolerance available
• Cover connected to ground
• High shock resistance, to 1000g
• COTS/Dual use
NEL recommends connecting the large
pad located between the general signal
pads to ground for heat transfer and
improved RF grounding.
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
SR-A29B0 Series
Continued
Differential Positive ECL (DPECL)
Operating Conditions and Output Characteristics
Electrical Characteristics
Parameter
Frequency
Sub-Harmonic
Harmonic
Duty Cycle
Logic 0
(1)
Logic 1
(1)
Rise & Fall Time
Jitter RMS
(5)
Jitter Deterministic
Enable Voltage
(2)
Disable Voltage
Frequency Stability
(3)
Phase Noise
(4)
Symbol
Conditions
Min
-----
-----
250.0MHz
-----
-----
-----
-----
-----
-----
-----
@ 50% points
45/55%
V
OL
-----
V
CC
-1.810V
V
OH
-----
V
CC
-1.025V
tr,tf 20-80%V
O
with 50 ohm load to V
CC
-2V -----
-----
-----
-----
-----
-----
-----
----
with V
EE
=0V
0V
3.0V
-----
with V
EE
=0V
dF/F
Overall conditions including:
-100ppm
voltage, calibration, temp.,
10 yr aging, shock, vibration
-----
@100Hz
-----
-----
@1kHz
-----
-----
@10kHz
-----
-----
@100kHz
-----
-----
@1MHz
-----
-----
@10MHz
-----
Data Sheet 0447G
Rev. M
Typical
-----
-45dBc
-----
-----
-----
-----
350 psec
0.3 psec
6 psec
-----
-----
-----
-----
-----
-----
-----
-----
-----
Max
1.7GHz
-40dBc
-10dBc
55/45%
V
CC
-1.620V
V
CC
-0.880V
600 psec
0.5 psec
12 psec
1.0V
V
CC
+100ppm
-80 dBc/Hz
-115 dBc/Hz
-130 dBc/Hz
-130 dBc/Hz
-135 dBc/Hz
-135 dBc/Hz
General Characteristics
Parameter
Supply Voltage
Supply Current
Symbol
V
CC
I
CC
Conditions
3.3V±5%
50 ohm termination
To 2.00V below V
CC
Low level Output Current
------
-----
Min
3.135V
0.0 mA
Typical
3.3V
-----
-----
-----
-----
Max
3.465V
120 mA
±50.0 mA
70°C
125°C
Output current
I
O
0.0 mA
Operating temperature
T
A
0°C
-55°C
Storage temperature
T
S
Input: Logic High (ECL) - Disables
V
EE
or Open - Enables
Load
50 Ohm to V
CC
-2V or Thevenin Equivalent, Bias Required
Start-up time
t
S
-----
-----
2 ms
10 ms
Environmental and Mechanical Characteristics
Mechanical Shock
Thermal Shock
Vibration
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
Footnotes:
1) V
OL
, V
OH
, referenced to ground
2) Open to Enable pin also enables the output.
3) Standard frequency stability (others available)
4) Phase Noise characterization available. Phase Noise
is frequency dependant, phase noise specification
references a 1.0GHz part.
5) Jitter performance is frequency dependant. Please
contact factor for full Aeroflex characterization.
RMS bandwidth of 12kHz to 20MHz.
Creating a Part Number
SR - A29BX - FREQ
Package Code
SR 8 pad 9x14mm 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
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
SR-A29B0 Series
Continued
Data Sheet 0447G
Rev. M
Max Reflow Profile
The device may be reflowed once. Reflowing upside down is not allowed. NO CLEAN assembly is recommended.
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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