VTC4 Просмотр технического описания (PDF) - Vectron International

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VTC4

Voltage Controlled Temperature Compensated Crystal Oscillator

Vectron International 

VTC4 Data Sheet

VCXO Functional Description

VCXO Feature: The VTC4 can be ordered with a VCXO function for applications where 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 where the VTC4 will not be used in a PLL, or the output frequency

does not fine tune adjustments, the best device to use would be a VTC4-x0xx. 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

1

GND or

VC

2

GND

3

fO

4

VDD

Function

Ground for a VTC4-x0xx option

or VCXO Control Voltage

Electrical and Case Ground

Output Frequency

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

Devices will be marked with the frequency

Figure 3, Package drawing

Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com

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