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TCXO-820-EFG-256 Fiches technique(PDF) 3 Page - Vectron International, Inc

No de pièce TCXO-820-EFG-256
Description  Temperature Compensated Crystal Oscillator
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Fabricant  VECTRON [Vectron International, Inc]
Site Internet  http://www.vectron.com
Logo VECTRON - Vectron International, Inc

TCXO-820-EFG-256 Fiches technique(HTML) 3 Page - Vectron International, Inc

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Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Page3
VCXO Feature: The VT-820 can be ordered with a VCXO function for applications were it will be used in a PLL, or the output
frequency needs fine tune or calibration adjustments. This is a high impedance input , 500KMohm, and can be driven with an op-
amp or terminated with adjustable resistors etc. Pin 1 should not be left floating on the VCXO optional device.
“No Adjust” Option: In applications were the VT-820 will not be used in a PLL , or the output frequency does not need fine tune
adjustments, the best device to use would be a VT-820-xxx-xxx0. By using the “no adjust” option, the circuit is simplified as Vc
does not need to be adjusted or set to a predetermined voltage and pin 1 should be grounded (pin 1 can be left open but should
not be set to a voltage such as an RF signal or power supply voltage.
VCXO Function
Table 3. Pinout
Pin #
Symbol
Function
1V
C
TCXO Control Voltage or Ground
2
GND
Electrical and Lid Ground
3f
o
Output Frequency
4V
DD
Supply Voltage
Outline Drawing
Recommended Pad Layout
Maximum Ratings
Absolute Maximum Ratings and Handling Precautions
Stresses in excess of the absolute maximum ratings can permanently damage the device. Functional operation is not implied
or any other excess of conditions represented in the operational sections of this data sheet. Exposure to absolute maximum
ratings for extended periods may adversely affect device reliability.
Although ESD protection circuitry has been designed into the VT-820, proper precautions should be taken when handling
and mounting, VI employs a Human Body Model and Charged Device Model for ESD susceptibility testing and design
evaluation.
ESD thresholds are dependent on the circuit parameters used to define the model. Although no industry standard has been
adopted for the CDM a standard resistance of 1.5kOhms and capacitance of 100pF is widely used and therefor can be used for
comparison purposes.
Table 4. Maximum Ratings
Parameter
Symbol
Rating
Unit
Storage Temperature
T
STORE
-40/85
ºC
Supply Voltage
V
DD
6V
Control Voltage
V
C
0/V
DD
V
ESD, Human Body Model
1000
V
ESD, Charged Device Model
1000
V
12
3
4
2
1
3
4
2.5±0.2
3.2±0.2
1.0 max
0.55±0.1
0.65
0.85
1.95
Package drawing for the ±0.5ppm over -30/80°C and <±2ppm over -40/85°C stability options
Frequency
Date Code
2.60
1.25
1.0±0.1
1.65


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