VT98001 데이터 시트보기 (PDF) - Vaishali Semiconductor

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VT98001

Multifrequency Synthesizer

Vaishali Semiconductor 

Advance Information

VT98001

Multifrequency Synthesizer

Applications

•= Set-top boxes

•= MPEG Video clock source

General Description

The Vaishali VT98001 is a single-chip, integrated multiple Phase Locked Loop (PLL) clock synthesizer. The

device uses an analog Phase Locked Loop (PLL) to accept a 27 MHz crystal input to produce multiple

outputs. Selection pins are used to provide various outputs.

Features

•= 24.576 MHz for Firewire IEEE1394 or video

digitizer

•= 24.576 MHz / 28.224 MHz for software or

hardware modem

•= 27 MHz buffered output clock

•= 6.000MHz buffered output clock

•= 18.432 MHz for audio processor

•= 2kHz standby clock

•= Zero ppm synthesis error in all clocks

(except the 2 kHz standby clock)

•= 5V tolerant inputs

•= 20-pin, 150 mil SSOP (QSOP)

Figure 1. Functional Block Diagram

VDD1

VDD2

VDD3

VDD4

ROM Table

X2

osc

27 MHz

Crystal

X1

Divider

/PD

Buffer

PLL

Multiplier

Buffer Buffer

Buffer

24.576/

28.224 MHz

Buffer

Select

24/28 MHz

24.576 MHz

Buffer

MODE

18.432MHz/

6.000MHz

2kHz

27 MHz 27 MHz GND1 GND2 GND3 GND4 GND5

2001-07-25

Page 1

MDST-0013-00

www.vaishali.com

Vaishali Semiconductor 747 Camden Avenue, Suite C Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063

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