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PT0147(11/03)

Ver: 0

1

Data Sheet

PT7V4027 VCXO

Product Features

3.3V operating voltage

Uses an inexpensive external crystal

On-chip VCXO with pull range of 240ppm

VCXO tuning voltage from 0 to 3.3V

10mA output driver at CMOS levels

Available in SOIC package

Logic Block Diagram

Pin Configuration

Pin Description

Pin Number

1,8

Pin Name

X1, X2

Type

I

Description

Crystal Connection

Output State Control, enables output when high or open, sets

output high impedance when low.

No Connect

Voltage Input to VCXO

Ground

Clock Output

Power Supply

Note

7

OE

I

2

3

4

5

6

NC

V

IN

GND

CLKOUT

V

CC

I

PWR

O

PWR

Note: 0.1

μ

F or 0.01

μ

F bypass capacitor is required.

General Description

The PT7V4027 is a low-cost, high-performance 3.3V

VCXO, designed to replace expensive VCXO modules.

The on-chip Voltage Controlled Crystal Oscillator accepts a

0 to 3.3V input voltage to cause clocks to vary by

±

120ppm. This device uses an inexpensive external

pullable crystal at 27 MHz to produce the same output

frequency.

The PT7V4027 is designed for Set-Top Box applications.

OE

CC

OE

PT7V4027