TC-350 (Vectron)
Temperature Compensated Crystal Oscillators

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Product Data Sheet
TC-350 Series Low Profile TCXO’s
Temperature Compensated Crystal Oscillators
Features
• Frequency from 1 to 77.76 MHz
• ±1.0 ppm, -40°C to +85°C
• Low Profile: 3.81 mm (0.15”) Ht.
• Aging <5 ppm for Ten Years
• 3.3 Vdc or 5 Vdc operation
• TTL/HCMOS Output
Applications
• SMC Clock
• SONET/SDH Network Timing Sources
• Wireless Communications
• Satellite Communications
• Portable Test Equipment
Description
Vectron International has introduced a series of low profile
surface mount, Temperature Compensated Crystal
Oscillators (TCXO’s) available in frequencies from 1 to 77.76
MHz.
The TC-350 series surface mount TCXO can be mounted
using the standard convection reflow process. Current drain
to less than 5 mA is available upon request. Aging <5 ppm
for ten years.
For additional information about TCXO’s visit our website at:
www.tcxo.com


TC-350 (Vectron)
Temperature Compensated Crystal Oscillators

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TC-350 Series Low Profile TCXO’s
Performance Characteristics
Parameter Characteristics
Standard Frequencies:
10.00, 12.80, 13.00, 16.384, 19.44, 20.00, 20.48, 27.00 MHz
Available from 1.0 MHz to 77.76 MHz
Package: 22.86 x 17.78 x 3.81 mm (0.90” x 0.70” x 0.15”)
Supply Voltage (Vdd):
(Other options are available upon request)
Current:
C = 5.0 Vdc ±5%
D = 3.3 Vdc ±5%
Current draw will vary greatly depending on frequency and output
type. For this series TCXO typical current draw will be about 10 mA.
Please consult the factory about your exact current requirements.
Output: A = HCMOS/ACMOS
B = 10 TTL
Voh min. 0.8 Vdd
2.4 Vdc
Voh max. 0.5 Vdc
0.5 Vdc
Rise/Fall Time: 5 ns max.
10 ns max.
Symmetry (Duty Cycle): 50% ±10%
50% ±10%
Load: 100k ohm // 10 pF
10 TTL
Temperature Stability:
Aging (typical):
Frequency vs. Supply:
Electrical Frequency Adjust:
B-507 = ±5.0 x 10-7
B-106 = ±1.0 x 10-6
C-507 = ±5.0 x 10-7
C-106 = ±1.0 x 10-6
D-757 = ±7.5 x 10-7
D-156 = ±1.5 x 10-6
F-106 = ±1.0 x 10-6
F-206 = ±2.0 x 10-6
G-156 = ±1.5 x 10-6
G-256 = ±2.5 x 10-6
over 0°C to +50°C
over 0°C to +50°C
over 0°C to +70°C
over 0°C to +70°C
over -20°C to +70°C
over -20°C to +70°C
over -40°C to +85°C
over -40°C to +85°C
over -55°C to +85°C
over -55°C to +85°C
<5 ppm for ten years @ +70°C
<±0.1 ppm for a ±5% change in Supply Voltage
±5 ppm minimum via external voltage, 0 to Vdd
NOTE: Tighter
stabilities and
wider temperature
ranges are avail-
able, please con-
sult the factory.
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Web: www.vectron.com
2


TC-350 (Vectron)
Temperature Compensated Crystal Oscillators

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Outlline Drawing
22.86
( .900)
TC-350 Series Low Profile TCXO’s
2.54
( .100)
12
17.78
( .700)
mm
'(#in))
Recommended Pad Layout
3.81
( .15)
4
7.62
( .300)
2.54
( .100)
.100
.100
.045R
4 places
3
Pin
I
2
3
4
Function
Output
Freq. Adj.
GND
Supply
3.175 SQ
(.125)
Pad Layout
for 350 Package
17.78
(.700)
12.7
(.500)
7.62
(.300)
mm
'#(in))
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Web: www.vectron.com
3


TC-350 (Vectron)
Temperature Compensated Crystal Oscillators

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TC-350 Series Low Profile TCXO’s
Recommended Reflow Profile
pre-heating
60 to 90 sec.
at 150°C to 170°C
reflow
20 to 40 sec.
at > 200°C
Note: TCXO’s are precision subsystems with tolerances measured to 0.01 ppm. Non-
Hermetically sealed TCXO’s should not be subjected to a wash process that will immerse the
TCXO in solvents. NO CLEAN is the recommended procedure. The TC-350 series of TCXO’s has
been designed for pick and place reflow soldering. The suggested reflow profile is shown above.
The TCXO may be relfowed one time in the non-inverted state. Typical frequency shift as a result
of reflow is <1.0 ppm per reflow. VI recommends waiting at least two hours after reflow below
measuring the unit.
Output Loads
Vdd
.01µF
DUT
OUT
PROBE
RL
CL
(A) HCMOS / ACMOS
Vdd
.01µF PROBE
DUT OUT
D1
R1
6k
(B) TTL
Vdd
R2
270Ω
D2
D3
C1
.01µF
D4
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Web: www.vectron.com
4


TC-350 (Vectron)
Temperature Compensated Crystal Oscillators

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TC-350 Series Low Profile TCXO’s
Standard Shipping Method
The Standard ship method for volume production of the TC-350 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.
12 15/16
0.44
0.20 Deep
VI Logo 0.44
0.25
4.00
0.15
0.95
0.25
0.75
0.15
3 x 13 Array / 39 units per tray
Pin 1
this corner
Handling Precautions
Although protection circuitry has been designed into
this device, proper precautions should be taken to avoid
exposure to electrostatic discharge (ESD) during han-
dling and mounting. VI employs a human-body model
*HBM) and a charged-device model (CDM) for ESD-sus-
ceptibility testing and protection design evaluation. ESD
voltage thresholds are depending on the circuit parame-
ters used to define the mode.
Although no industry-wide standard has been adopt-
ed for the CDM, a standard HBM (resistance =1500
ohms, capacitance - 1000 pf) is widely used and therefore
can be used for comparison purposes. The HBM ESD
threshold presented here was obtained by using these cir-
cuit parameters.
ESD Threshold Voltage
Model
Threshold
Human-Body (HBM)
500
Charged-Device
500
Unit
V min
V min
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • Web: www.vectron.com
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TC-350 (Vectron)
Temperature Compensated Crystal Oscillators

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TC-350 Series Low Profile TCXO’s
Ordering Information
TC - 350 - D A G - 256
A - 12.80 MHz
Product Family
TC = TCXO
Package
350 = SMT package
Output Frequency
1.0 to 77.76 MHz
Supply Voltage
C = 5.0 Vdc ±5%
D = 3.3 Vdc ±5%
Pin 1 Options
A = Standard, No Options
(Default)
Output Type
A = HCMOS / ACMOS
B = 10 TTL
Temperature Stability
B-507 = ±5.0 x 10-7 over 0°C to +50°C
B-106 = ±1.0 x 10-6 over 0°C to +50°C
C-507 = ±5.0 x 10-7 over 0°C to +70°C
C-106 = ±1.0 x 10-6 over 0°C to +70°C
D-757 = ±7.5 x 10-7 over -20°C to +70°C
D-156 = ±1.5 x 10-6 over -20°C to +70°C
F-106 = ±1.0 x 10-6 over -40°C to +85°C
F-206 = ±2.0 x 10-6 over -40°C to +85°C
G-156 = ±1.5 x 10-6 over -55°C to +85°C
G-256 = ±2.5 x 10-6 over -55°C to +85°C
Note: Other
stabilities are
available upon
request.
Visit our website at www.vectron.com
For additional information please contact:
www.vectron.com
USA: Vectron International • 267 Lowell Road, Hudson, NH 03051 . . . . . Tel: 1-88-VECTRON-1 • Fax: 1-888-FAX-VECTRON
EUROPE: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tel: 49 (0) 3328 4784 17 Fax: 49 (0) 3328 4784 30
ASIA: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tel: +86 21 28909740 / 41 /42 Fax: +86 21 28909240 / 2890999
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.
©2001, Vectron International.
Rev.04Jan02, 19Aug02




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