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
LVCMOS
SC-B1440 Series
PRELIMINARY
Description
The SC-B1440 Series of quartz crystal oscillators provide enable/disable 3-state LVCMOS compatible
signals for bus connected systems. Supplying Pin 1 of the SC-B1440 units with a logic "1" or open enables
its Pin 3 output. In the disable mode, Pin 3 presents a high impedance to the load.
Features
Wide frequency range80.0MHz to 125.0MHz
(Contact factory for other frequencies)
User specified tolerance available
Will withstand vapor phase temperatures of 253C
for 4 minutes maximum
Space-saving alternative to discrete component
oscillators
2.5 Volt operation
High shock resistance, to 1000g
Low Jitter - Wavecrest jitter characterization
available
High Reliability - NEL HALT/HASS qualified for
crystal oscillator start-up conditions
High Q Crystal actively tuned oscillator circuit
Power supply decoupling internal
No internal PLL avoids cascading PLL problems
High frequencies due to proprietary design
Metal lid electrically connected to ground to
reduce EMI
Gold plated pads
Electrical
Connection
Pin Connection
1 Enable/Disable
2 Ground
3 Output
4 V
DD
CRYSTAL CLOCK OSCILLATORS
Data Sheet 0135C
Rev. D
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
SC-B1440 Series Continued
LVCMOS
Operating Conditions and Output Characteristics
Electrical Characteristics
Parameter
Symbol
Conditions
Min
Typical
Max
Frequency
-----
-----
80.0MHz -----
125.0MHz
Duty Cycle -----
@ V
DD
/2
45/55% -----
55/45%
Logic 0
V
OL
@ 600A -----
0.1V
0.2V
Logic 1
V
OH
@ 600A
V
DD
-0.2V V
DD
-0.1V -----
Rise & Fall Time
tr,tf
10-90%V
O
----- 1.0 ns
2.0 ns
Jitter, RMS
(2)
-----
Overtone
-----
-----
3 psec
T
pz
-----
-----
-----
-----
100 ns
Enable Voltage
-----
-----
V
DD
-0.4V
-----
-----
Disable Voltage
-----
-----
-----
-----
0.4V
Frequency Stability
(1)
dF/F
Overall conditions including:
-100ppm
-----
+100ppm
voltage, calibration, temp.,
10 yr aging, shock, vibration
General Characteristics
Parameter
Symbol
Conditions
Min
Typical
Max
Supply Voltage
(3)
V
DD
-----
2.375V 2.5V
2.625V
Supply Current
I
DD
No Load
0.0 mA
40 mA
60 mA
Output current
I
O
Low level Output Current 0.0 mA -----
25.0 mA
Operating temperature
T
A
------
0C -----
70C
Storage temperature
T
S
----- -55C -----
125C
Power Dissipation
P
D
-----
-----
-----
158 mW
Lead temperature
T
L
Soldering, 10 sec. ----- -----
300C
Load
-----
-----
-----
-----
15pf
Start-up Time
t
s
-----
-----
-----
10 ms
Environmental and Mechanical Characteristics
Mechanical Shock
Per MIL-STD-202, Method 213, Condition E
Thermal Shock
Per MIL-STD-833, Method 1011, Condition A
Vibration
0.060" double amplitude 10 Hz to 55 Hz, 35g's 55Hz to 2000 Hz
Soldering Condition
300C for 10 seconds
Hermetic Seal
Leak rate less than 1 x 10
-8
atm.cc/sec of helium
Footnotes:
1) Standard frequency stability (20,25,50ppm & others available)
2) Jitter performance is frequency dependent. Please contact factory for full Wavecrest characterization.
3) Internal high frequency power source decoupling.
Test Load:
Rev. D
CRYSTAL CLOCK OSCILLATORS
SC - B144X - FREQ
Package Code
Tolerance/Performance
SC 4 pad 5x7mm SMD
0 100ppm 0-70C
1 50ppm 0-70C
7 25ppm 0-70C
Input Voltage
9 Customer Specific
Code Specification
A 20ppm 0-70C
A 3.3V
B 50ppm -40 to +85C
B 2. 5V
C 100ppm -40 to +85C
5V
Creating a Part Number
Data Sheet 0135C
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