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, -40C to +85C
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 Series Low Profile TCXO's
Performance Characteristics
Vectron International
267 Lowell Road, Hudson, NH 03051 Tel: 1-88-VECTRON-1 Web: www.vectron.com
2
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):
C = 5.0 Vdc 5%
(Other options are available upon request)
D = 3.3 Vdc 5%
Current:
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:
B-507 =
5.0 x 10
-7
over 0C to
+50C
B-106 =
1.0 x 10
-6
over 0C to
+50C
C-507 =
5.0 x 10
-7
over 0C to
+70C
C-106 =
1.0 x 10
-6
over 0C to
+70C
D-757 =
7.5 x 10
-7
over -20C to
+70C
D-156 =
1.5 x 10
-6
over -20C to
+70C
F-106 =
1.0 x 10
-6
over -40C to
+85C
F-206 =
2.0 x 10
-6
over -40C to
+85C
G-156 =
1.5 x 10
-6
over -55C to
+85C
G-256 =
2.5 x 10
-6
over -55C to
+85C
Aging (typical):
<5 ppm for ten years @ +70C
Frequency vs. Supply:
<0.1 ppm for a 5% change in Supply Voltage
Electrical Frequency Adjust:
5 ppm minimum via external voltage, 0 to Vdd
NOTE: Tighter
stabilities and
wider temperature
ranges are avail-
able, please con-
sult the
factory.
Parameter
Characteristics
Vectron International
267 Lowell Road, Hudson, NH 03051 Tel: 1-88-VECTRON-1 Web: www.vectron.com
3
TC-350 Series Low Profile TCXO's
Outlline Drawing
Recommended Pad Layout
17.78
(.700)
(.300)
(.500)
(.125)
12.7
7.62
3.175
'# )
SQ
'# )
.100
.045R
.100
3.81
( .15)
17.78
( .700)
22.86
( .900)
7.62
( .300)
2.54
( .100)
2.54
( .100)
1
2
4
3
4 places
Pad Layout
for 350 Package
Pin
Function
I
Output
2
Freq. Adj.
3
GND
4
Supply
mm
(in)
mm
(in)
4
TC-350 Series Low Profile TCXO's
Vectron International
267 Lowell Road, Hudson, NH 03051 Tel: 1-88-VECTRON-1 Web: www.vectron.com
Recommended Reflow Profile
Output Loads
pre-heating
60 to 90 sec.
at 150
C to 170C
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.
OUT
Vdd
.01F
PROBE
DUT
R1
6k
V d d
PROBE
OUT
DUT
D1
D2
D3
D4
R2
C1
.01
F
.01F
Vdd
270
(A) HCMOS / ACMOS
(B) TTL
RL
CL
TC-350 Series Low Profile TCXO's
5
Vectron International
267 Lowell Road, Hudson, NH 03051 Tel: 1-88-VECTRON-1 Web: www.vectron.com
Standard Shipping Method
Handling Precautions
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.
0.95
0.75
0.15
0.15
0.25
4.00
0.25
12 15/16
0.44
0.44
VI Logo
0.20 Deep
Pin 1
this corner
3 x 13 Array / 39 units per tray
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
Unit
Human-Body (HBM)
500
V min
Charged-Device
500
V min
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
www.vectron.com
For additional information please contact:
TC-350 Series Low Profile TCXO's
Ordering Information
Visit our website at www.vectron.com
TC
D
A
G
-
-
-
256
A
Product Family
TC = TCXO
Package
350 = SMT package
Supply Voltage
C = 5.0 Vdc 5%
D = 3.3 Vdc 5%
Output Frequency
1.0 to 77.76 MHz
Pin 1 Options
A = Standard, No Options
(Default)
Note: Other
stabilities are
available upon
request.
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
350
-
Output Type
A = HCMOS / ACMOS
B = 10 TTL
MHz
12.80
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