SK-A29B0
Series
Differential Positive ECL (DPECL)
SK-A29B0 Series
Rev D
Frequency Range: 350.0 MHz to 1.7 GHz
Description
The SK-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
20 x 13
Features
• High Reliability - NEL HALT/HASS
qualified for crystal oscillator start-up
conditions
• Low jitter - Wavecrest jitter characterization
available
• Wide frequency range—350.0 MHz to
1.7 GHz
• User specified tolerance available
• Case at electrical ground
• Will withstand SMD reflow temperatures of
253°C for 4 minutes maximum
I/O
8 pin (14 pin) SMD Gull Wing
Supply Voltage
3.3V / 2.5V
• All metal, resistance weld, hermetically
sealed package
• High shock resistance, to 1500g
• High Q Crystal actively tuned oscillator
circuit
• Power supply decoupling internal
• High frequencies due to proprietary design
• RoHS complaint, lead free construction
Creating a Part Number
Package Code
HK
Leaded 8 pin (14 pin)
SK
8 pin (14 pin) SMD Gull Wing
Input Voltage
Code
Specification
A
3.3 V
B
2.5 V
SK - A29BX - FREQ
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
Electrical Connections
Pin
Connection
1
V
CC
2
V
EE
Case
6
V
EE
Case
7
Output
8
/Output
9
V
EE
Case
13
V
EE
Case
14
Enable/Disable
For the most up to date
specifications on each NEL
product, log on to our
website—www.nelfc.com
All other pins are no connect
Dimension shown in inches and (mm).
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
B9
Differential Positive ECL (DPECL)
SK-A29B0 Series
Rev D
Frequency Range: 350.0 MHz to 1.7 GHz
Operating Conditions and Output Characteristics
Electrical Characteristics
Parameter
Symbol
Frequency
Duty Cycle
Logic 0
(1)
Logic 1
(1)
Rise & Fall Time
Jitter, RMS
(4)
Enable Voltage
(2)
Disable Voltage
Frequency Stability
(3)
—
—
350.0 MHz
—
@50% points
45/55%
V
OL
—
V
CC
-1.810 V
V
OH
—
V
CC
-1.025 V
tr, tf 20-80% V
O
with 50 ohm load to V
CC
-2V
—
—
—
—
—
with V
EE
= 0V
0V
—
with V
EE
= 0V
3.0 V
dF/F
Overall conditions including:
-100 ppm
voltage, calibration, temp.,
10 yr aging, shock, vibration
Conditions
Min
Typical
—
—
—
—
350 psec
0.3 psec
—
—
—
1.7 GHz
55/45%
V
CC
-1.620 V
V
CC
-0.880 V
600 psec
0.5 psec
1.0 V
V
CC
+100 ppm
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
—
—
3.3V±5%
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
160 mA
±50.0 mA
70ºC
125ºC
300ºC
10 ms
Max
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 55 Hz to 2000 Hz
300ºC for 10 seconds
Leak rate less than 1 x 10
-8
atm.cc/sec of helium
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) Jitter performance is frequency dependent. Please contact factory for full Aeroflex characterization.
RMS jitter bandwidth of 12kHz to 20MHz.
Test Circuit
1
8
7
2, 6, 9, 13
Test Circuit uses a split supply of
+2V and -1.3V for ease of testing.
B10
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