Temperature Compensated Crystal Oscillator
TX-321
TX-321
Description
The TX-321 Series TCXO combines Vectrons lowest phase noise TCXO option with good g-sensitivity in a 23x18 mm package.
Features
• Low Phase Noise, Low g-sensitivity 0.2ppb/g
• Fully RoHS Compliant
• Surface Mount, Low Profile
• Shock Survival up to 10k g
• Frequency Range: 5 MHz to 50 MHz
• Common Frequencies: 5, 10, 16.368, 20, 25, 32.736, 38.4, 40,
& 50 MHz
Applications
• Military Portable Radios
• GPS Telemetry
• Test and Measurement Equipment
Performance Specifications
1,2
Parameter
vs. operating temperature range
(referenced to +25°C)
Initial Tolerance
vs. supply voltage change
vs. load change
vs. aging / 1 year
vs. aging
Supply voltage
Supply voltage
Current consumption
Min
Typ
Max
Units
Condition
-40… +85°C
(for tighter stabilities contact factory)
at time of shipment, nominal EFC
Vs ± 5%
Load ± 10%
@ +40°C
for 15 years
Frequency Stabilities
1
-1.0
-1.0
-0.1
-0.1
+1.0
+1.0
+0.1
+0.1
4.0
5.25
3.465
25
ppm
ppm
ppm
ppm
ppm
ppm
VDC
VDC
mA
Increases with output frequency
±1
Supply Voltage (Vs)
4.75
3.135
5.0
3.3
Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Performance Specifications
Parameter
Signal
Load
Signal Level (Vol)
Signal Level (Voh)
Rise/Fall Time
Duty cycle
Signal
Load
Output Power
Harmonics
Tuning Range (optionsA)
Tuning Range (options B)
Tuning Slope
Control Voltage Range
Freq. control input impedance
Phase Noise
3
(@ 10 MHz - no vibration)
0.0
100
±5.0
0
50
6
-30
40
50
0.9*Vs
5
60
Sine
Ohm
dBm
dBc
into 50 Ohms
15
0.1*Vs
Min
Typ
Max
RF Output
HCMOS
Units
Condition
pF
V
V
ns
%
@ nominal Load and 10% to 90% of waveform
@ nominal Load and @ 50% level
Electronic Frequency Control (EFC)
Fixed; No adjust
±12
Positive
Vs
VDC
kohm
ppm
Additional Parameters
2
-116
-138
-150
-162
-165
-104
-126
-144
-160
-165
0.2
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
ppb/g
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
per axis
MIL-STD-883G; Method 2002; Condition B
MIL-STD-202G, METHOD 204D, Test Condition D
MIL-STD-202, METHOD 107, Test Condition A
Absolute Maximum Ratings
Supply voltage (Vs)
Control Voltage
Operable temperature range
Storage temperature range
0
-45
-55
6.0
Vs
+90
+125
V
V
°C
°C
Damage will occur beyond this level
Phase Noise
3
(@ 40 MHz - no vibration)
g-sensitivity
Shock
Vibration Sine
Thermal Cycling
Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Phase Noise Plot at 20 MHz
Standard Shipping Method
The Standard ship method for volume production of the TX-321 series is in a matrix tray. These trays are 100% recyclable. The trays also
offer the added feature that they can be continuously feed into a pick-n-place machine eliminating the down time required
with tape-n-reel.
Recommended Reflow Profile
IPC/JEDEC J-STD-020 (latest revision)
Additional Information:
This SMD oscillator has been designed for pick and place reflow soldering.
Recommended Pad Layout
Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
Outline Drawing / Enclosure
All dimensions in inches
Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
