VT73227 데이터 시트보기 (PDF) - Vaishali Semiconductor

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VT73227

VCXO (Voltage-Controlled Crystal Oscillator) 27 MHz 3.3V

Vaishali Semiconductor 

VT73227

VCXO

(Voltage-Controlled Crystal Oscillator)

27 MHz 3.3V

Applications

•= Set-top boxes

•= Telecom switching

•= Oscillator replacement

•= MPEG Video clock source

General Description

The Vaishali VT73227 is a single-chip, low-jitter Voltage-Controlled-Crystal-Oscillator. The device accepts

a 27 MHz, 20 pF (pull range of 200 ppm) crystal input, and produces a low jitter output at the same

frequency. A 0 to 3.0V control signal is used to fine tune the output clock frequency in the ±100ppm range.

Features

•= 3.3V operating voltage

•= Uses inexpensive pullable crystal

•= 12mA drive capability at TTL levels

•= On-chip oscillator with 200 ppm pull

range (±100 ppm)

•= 8 pin SOIC package

Figure 1. Functional Block Diagram

VDD1

VDD2

VIN

X2

27 MHz

Pullable

Crystal

Load Cap Control

Load

Caps

Oscillator

X1

GND1

Output

Buffer

CLK1

GND2

2001-04-02

Page 1

MDST-0006-03

Vaishali Semiconductor 1300 White Oaks Road, Ste. 200 Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063

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