SR-A29B0
Series
Differential Positive ECL (DPECL)
SR-A29B0 Series
Rev G
Frequency Range: 250.0 MHz-1.7 GHz
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.
Size, mm
9 x 14
Features
• Wide frequency range – 250.0MHz to
1.7GHz
• User specified tolerance available
• Will withstand SMD reflow temperatures of
183°C for 4 minutes maximum
• High shock resistance, to 1000g
I/O
8 pad
Supply Voltage
3.3V / 2.5V
• Patent Pending, harmonic
multiplication for
extremely low jitter
• High frequency output
eliminates the need for
PLL multiplication
• Stabilities over
temperatures as low as
±20ppm eliminates SAW
oscillator temperature
problems
• High Reliability - NEL HALT/HASS
qualified for crystal oscillator start-up
conditions
• Cover connected to ground
• 3.3V and 2.5V versions available
Creating a Part Number
SR - A29BX - FREQ
Package Code
SR
8 pad 9x14 mm SMD
Input Voltage
Code
Specification
A
3.3 V
B
2.5 V
Tolerance/Performance
0 ±100 ppm 0-70°C
1 ±50 ppm 0-70°C
7 ±25 ppm 0-70°C
9 Customer Specific
A ±20 ppm 0-70°C
B ±50 ppm -40 to +85°C
C ±100 ppm -40 to +85°C
Drawing Specifications
For the most up to date
specifications on each NEL
product, log on to our
website—www.nelfc.com
Electrical Connections
Pin
Connection
1
V
CC
2
Ground
3
NC or Ground
4
Q Output
5
/Q Output
6
Ground
7
Ground
8
Enable
Recommended Board Layout
Dimensions shown in inches (mm).
The metallic center pad was designed for
mechanical support. Grounding of this pad is
optional. It measures 0.088 x 0.190 NOM
(2.24 x 4.83 NOM).
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
Differential Positive ECL (DPECL)
SR-A29B0 Series
Rev G
Frequency Range: 250.0 MHz-1.7 GHz
Operating Conditions and Output Characteristics
Electrical Characteristics
Parameter
Symbol
Frequency
Duty Cycle
Logic 0
(1)
Logic 1
(1)
Rise & Fall Time
RMS Random Jitter
(5)
Enable Voltage
(2)
Disable Voltage
Frequency Stability
(3)
Phase Noise
(4)
—
—
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
—
with V
EE
=0V
3.0V
dF/F
Overall conditions including:
-100ppm
voltage, calibration, temp.,
10 yr aging, shock, vibration
—
@100Hz
—
—
@1kHz
—
—
@10kHz
—
—
@100kHz
—
—
@1MHz
—
—
@10MHz
—
Conditions
Min
Typical
—
—
—
—
350 psec
—
—
—
—
—
—
—
—
—
—
1.7GHz
55/45%
V
CC
-1.620V
V
CC
-0.880V
600 psec
1 psec
1.0V
V
CC
+100ppm
-80 dBc/Hz
-115 dBc/Hz
-130 dBc/Hz
-130 dBc/Hz
-135 dBc/Hz
-135 dBc/Hz
Max
General Characteristics
Parameter
Symbol
Supply Voltage
Supply Current
V
CC
I
CC
Output Current
I
O
0.0 mA
Operating Temperature
T
A
0ºC
Storage Temperature
T
S
-55ºC
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
—
—
—
50 ohm termination
to 2.00V below V
CC
Low level Output Current
—
—
Conditions
3.135 V
0.0 mA
Min
Typical
3.3 V
—
—
—
—
—
2 ms
3.465 V
120 mA
±50.0 mA
70ºC
125ºC
300ºC
10 ms
Max
Environmental and Mechanical Characteristics
Mechanical Shock
Thermal Shock
Vibration
Soldering Condition
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 55 Hz to 2000 Hz
300ºC for 10 seconds
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 dependent,
phase noise specification references a 1.0GHz part.
5) RMS jitter bandwidth of 12kHz to 20MHz.
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