VT-822
Temperature Compensated Crystal Oscillator
VT-822
Description
Vectron’s VT-822 Temperature Compensated Crystal Oscillator (TCXO) is a quartz stabilized, CMOS output, analog temperature
compensated oscillator, operating off either a 2.5 or 3.3 volt supply, in a hermetically sealed 3.2x2.5 ceramic package.
Features
•
•
•
•
•
CMOS Output
Output Frequencies to 54 MHz
Enable Disable Function
Fundamental Crystal Design
Hermetically Sealed Ceramic SMD package
•
•
•
•
•
•
•
•
Applications
WiMAX, Wi-Fi,Wi-LAN
Wireless Communications
Base Stations
Point to point radios
Broadband Access
Test Equipment
Handsets
Networking
• Product is compliant to RoHS directive
and fully compatible with lead free assembly
Block Diagram
V
DD
Crystal
Output
Analog
Temperature
Comp.
Enable/Disable
Gnd
Page1
Performance Specifications
Specifications
Table 1. Electrical Performance
Parameter
Output Frequency
Supply Voltage,
1
(Ordering Option)
Supply Current, to 19.999 MHz
20.001 - 55.000MHz
Operating Temperature, (Ordering Option)
Symbol
f
O
V
DD
I
DD
T
OP
Min.
4
Typ
+2.5 or +3.3
Max
54
3.0
7.0
Units
MHz
V
mA
°C
-20/70 or -40/85
STABILITY
Stability Over T
OP
, (Ordering Option)
Initial Accuracy
2
Power Supply Stability
Load Stability
Aging
OUTPUT
Output Level
2
Output Drive
Output Load
Output Rise and Fall Time
Duty Cycle
Phase Noise, 10.000MHz
10Hz
100Hz
1kHz
10kHz
100kHz
Jitter
3
Start-Up Time
ENABLE/DISABLE
Output Enabled
Output Disabled
Package Size
0.7*V
DD
or open
45
V
OH
V
OL
I
OH
I
OL
0.9*V
DD
±2.0, ±2.5, ±5.0
±2.0
±0.2
±0.2
±1.0
ppm
ppm
ppm
ppm
ppm/1st yr
V
0.1*V
DD
mA
mA
ns
%
dBc/Hz
4
-4
15pF
5
55
-75
-111
-141
-152
-156
2.1
20.0
2
ps rms
ps pk-pk
ms
V
0.3*V
DD
V
3.2x2.5
1. The VT-822 power supply pin should be filtered, eg, a 10uF, 0.1 and 0.01uf capacitor
2. Intial accuracy is guarenteed sixty minutes after a 260C reflow.
3. The Output is DC coupled.
4. Jitter is measured is a Wavecrest SIA3300C, 90K samples
Page2
Outline Drawing and Recommended Layout
Table 2. Pinout
Pin #
1
2
3
4
3.2±0.2
Symbol
E/D
GND
f
o
V
DD
Function
Enable/Disable
Electrical and Lid Ground
Output Frequency
Supply Voltage
2.5±0.2
Dimensions are in mm
1.0±0.1
#1
#2
0.65 1.0 0.65
1.3
1.0
1.3
1.1 0 .8 1.1
Bottom View
#4
0.9 1.2
#3
0.9
Maximum Ratings
S
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-822, 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 3. Maximum Ratings
Parameter
Storage Temperature
Supply Voltage
Enable Disable Voltage
ESD, Human Body Model
ESD, Charged Device Model
Symbol
T
STORE
V
DD
E/D
HBM
CDM
Rating
-40/125
-0.3/4
V
DD
1500
1000
Unit
ºC
V
V
V
V
Page3
Table 4. Environmental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Solderability
Fine and Gross Leak
Resistance to Solvents
Moisture Sensitivity Level
Contact Pads
Condition
MIL-STD-883 Method 2002
MIL-STD-883 Method 2007
MIL-STD-883 Method 1010
MIL-STD-883 Method 2003
MIL-STD-883 Method 1014
MIL-STD-883 Method 2015
MSL1
Gold (0.3um min - 1.0um max) over Nickel
The
Reliability
IR Compliance
S
Suggested IR Profile
Devices are built using lead free epoxy and can be subjected to
standard lead free IR reflow conditions shown in Table 5. Contact
pads are gold over nickel and lower maximum temperatures can also
be used, such as 220C.
Table 5. Reflow Profile
Parameter
PreHeat Time
Ramp Up
Time above 217°C
Time to Peak Temperature
Time at 260°C
Time at 240°C
Ramp down
Symbol
ts
R
UP
tL
tAMB-P
tP
tP2
R
DN
Value
200 sec Max
3°C/sec Max
150 sec Max
480 sec Max
30 sec Max
60 sec Max
6°C/sec Max
Tape & Reel
Table 6. Tape and Reel Information
Tape Dimensions (mm)
W
18
F
1.75
Do
1.55
Po
4
P1
4
A
178
B
2.5
Reel Dimensions (mm)
C
13
D
22
N
60
W1
11.5
W2
15
#/Reel
1000
Page4
Table 7. Standard Frequencies (MHz)
8.1920
16.000
19.6608
30.720
10.000
16.376
19.680
38.400
10.250
16.366667
19.680
40.000
12.000
16.367667
20.000
45.000
12.800
16.3677673
22.000
50.000
13.000
16.368
25.000
52.000
14.000
16.369
26.000
14.7456
16.736
27.000
15.360
16.800
27.4560
15.000
19.200
30.4000
Ordering Information
VT-822- E A E - 256 0- xxMxxxxxxx
Frequency in MHz
Product
TCXO
Package
2.5x3.2
Voltage Options
E: +3.3
Vdc ±5%
H: +2.5 Vdc ±5%
Tuning
0: Fixed, No tuning
Stability
206: ±2.0ppm
256: ±2.5ppm
506: ±5.0ppm
Temp Range
J: -20/70°C
E: -40/85°C
Output
A: CMOS
*Note: not all combination of options are available.
Other specifications may be available upon request.
Example: VT-822-EAE-2560-10M0000000
*
Add
_SNPBDIP
for tin lead solder dip
Example: VT-822-EAE-2560-26M0000000_SNPBDIP
For Additional Information, Please Contact
Revision History
Revision Date
Aug 10, 2018
Approved
FB
Description
Update logo and contact information, add “SNPBDIP” ordering option
Page5
51单片机
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
