VECTRON TC-350 User Manual

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

查询TC-350供应商

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 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

Aging (typical): <5 ppm for ten years @ +70°C

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 avail­able, please con­sult 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

Pad Layout

for 350 Package

Pin Function

I Output
2Freq. Adj.
3 GND
4 Supply

mm
(in)

mm

(in)

22.86

( .900)

17.78

( .700)

2.54

( .100)

1

4

2

'#)

3.81

( .15)

17.78

(.700)

.100

.045R

4 places

2.54

( .100)

.100

3.175

(.125)

7.62

( .300)

SQ

3

7.62

(.300)

12.7

(.500)

'#)

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

Note: TCXO’s are precision subsystems with tolerances measured to 0.01 ppm. Non­Hermetically 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.

Vdd

.01µF

DUT

OUT

pre-heating

60 to 90 sec.

at 150°C to 170°C

Vdd

.01µF

PROBE

RL

CL

DUT

reflow

20 to 40 sec.

at > 200°C

PROBE

OUT

D1

R1

6k

D2

D3

R2

270Ω

Vdd

C1

.01µF

(A) HCMOS / ACMOS (B) TTL

D4

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.

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. VI employs a human-body model
*HBM) and a charged-device model (CDM) for ESD-sus­ceptibility 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 adopt­ed 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 cir­cuit parameters.

ESD Threshold Voltage

Model Threshold Unit

Human-Body (HBM) 500 V min

Charged-Device 500 V min

12 15/16

0.44

0.25

4.00

0.15

0.95

0.25

0.75

0.15

3 x 13 Array / 39 units per tray

0.20 Deep

VI Logo

0.44

Pin 1

this corner

USA: Vectron International • 267 Lowell Road, Hudson, NH 03051 . . . . . Tel: 1-88-VECTRON-1 • Fax: 1-888-FAX-VECTRON

EUROPE: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tel: [phone] Fax: [phone]

ASIA: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tel: [phone] / 41 /42 Fax: [phone]

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 10-7over 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 10-6over 0°C to +70°C
D-757 = ±7.5 x 10

-7

over -20°C to +70°C

D-156 = ±1.5 x 10-6over -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 10-6over -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

MHz12.80