including clock recovery and frequency translation
applications. The metal package is grounded for
improved EMI performance.
The FTV Voltage Controlled Crystal Oscillator
Pin Information
Table 1. Pin Function
Pin
Symbol
1
V
C
7
GND
8
Output
14
V
DD
Function
VCXO Control Voltage
Case Ground
VCXO Output
Power Supply Voltage (3.3 or 5.0 V
±10%)
14
1
8
7
Performance Characteristics
Table 2. Electrical Performance
Parameter
Operating Temperature Range
1
Center Frequency
Absolute Pull Range
2
Supply Voltage
Supply Current
3
Output Voltage Levels
Output High
Output Low
3
Transition times
Rise Time
Fall Time
Fanout
Start-Up Time
Control Voltage
Fanout
Symbol
To
f
0
V
DD
I
DD
V
OH
V
OL
T
R
T
F
t
su
V
C
Fo
Minimum
Typical
Maximum
0 to 70, -20 To 70, or -40 to 85
1
-
52
+/- 20 to +/-100
3.3 or 5.0 (+/-10%)
-
0.45 mA/MHz
35
0.9 V
DD
-
0.1 V
DD
-
-
-
-
0.1 V
DD
-
-
-
-
2
-
-
5.0
5.0
10
-
0.9 V
DD
10 TTL
Units
°C
MHz
ppm
V
mA
V
V
ns
ns
TTL
ms
V
Loads
1. Other frequencies may be available, please contact factory with your special requirements.
2. A 0.1
µF
low frequency tantalum bypass capacitor in parallel with a 0.01
µF
high frequency ceramic capacitor is recommended. Both should be located as close to the FTU-Type bias pin as is practical
3. Figure 1 defines these parameters. Figure 2 illustrates the equivalent TTL load and operating conditions under which these parameters are specified and tested.
T
R
V
OH
V
S
V
OL
On Time
0V
Period
T
F
I
DD
14
V
DD
+
-
I
C
V
C
+
-
1
7
650Ω
8
15pF
1.83kΩ
Figure 1. Output Waveform
Figure 2. Output Test Conditions (25±5°C)
±
Vectron International
•
166 Glover Avenue, Norwalk, CT 06856
•
Tel: 1-88-VECTRON-1• http://www.vectron.com
1
F-Type VCXO
Handling Precautions
Although protection circuitry has been designed into this
device, proper precautions should be taken to avoid exposure
to electrostatic discharge (ESD) during handling and mounting.
VTI employs a human-body model (HBM) and a charged-
device model (CDM) for ESD-susceptibility testing and
protection design evaluation.
ESD voltage thresholds are dependent on the circuit
parameters used to define the mode. Although no industry-
wide standard has been adopted for the CDM, a standard HBM
(resistance = 1500Ω, capacitance = 100pF) is widely used and
therefore can be used for comparison purposes. The HBM
ESD threshold presented here was obtained by using these
In Austria,Belgium,France,Germany,Luxenburg,Netherlands,Sweden,Switzerland:Tel: 49(0)7263 6480
•
Fax:49(0)7263 6196
ASIA:
In China, Taiwan, Japan: Tel: 01 603 598 0070
•
Fax: 01 603 598 0075
In Korea, Singapore, Australia, India: Tel: 01 203 853 4433
•
Fax: 01 203 853 1423
rev 1.2, 4/27/98
Vectron International reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is assumed as a result of their use or
application. No rights under any patent accompany the sale of any such product(s) or information.
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