VTC4 Data Sheet

Vectron International 267 Lowell Rd, Hudson NH 03051

Tel: 1-88-VECTRON-1

e-mail: vectron@vectron.com

VCXO Functional Description

VCXO Feature: The VTC4 can be ordered with a VCXO function for applications were it will be used in a

PLL, or the output frequency needs fine tune adjustments. This is a high impedance input, 1 Mohm, and can

be driven with an op-amp or terminated with adjustable resistors etc. Pin 1 should not be left floating on

the VCXO optional devices.

“No Adjust” Feature: In applications were the VTC4 will be not be used in a PLL, or the output frequency

does not fine tune adjustments, the best device to use would be a VTC4-x0xxx. By using the “no adjust”

option, the circuit is simplified as Vc does not need to adjusted or set to a predetermined voltage and pin 1

should be grounded (pin 1 can be left open but should not be set to a voltage such as the supply).

Outline Diagrams, Pad Layout and Pin Out

Table 2. Pinout

Pin #

Symbol

Function

1

N/C or

No Connect (VTC4-x0xx)

or VCXO Control Voltage

2

GND

Electrical and Case Ground

3

Output Frequency

4

Supply Voltage

NOTE: Additional pads are used to program and adjust the TCXO during manufacturing and should be left

open; do not terminate these to the supply voltage. Some designs do not include these additional pads.

Contact Pads are gold over nickel

Figure 3, Package drawing