ICS487G-25T datasheet(1/6 Pages) ICST

Part #	ICS487G-25T

Description	Quad PLL for DTV

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Manufacturer	ICST [Integrated Circuit Systems]

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ICS487-25

MDS 487-25 A

1

Revision 050604

Integrated Circuit Systems l 525 Race Street, San Jose, CA 95126 l tel (408) 297-1201 l

www.icst.com

Quad PLL for DTV

Description

The ICS487-25 generates five high-quality,

high-frequency clock outputs. It is designed to replace

crystals and crystal oscillators in DTV applications.

Using ICS’ patented Phase Locked Loop (PLL)

techniques, the device runs from a lower frequency

crystal or clock input.

Because there is zero ppm frequency synthesis error

on the audio clocks, the audio will remain locked to the

video.

Features

• Packaged in 16-pin TSSOP

• Available in Pb-free packaging

• Replaces multiple crystals and oscillators

• Input crystal or clock frequency of 27 MHz

• Zero ppm frequency synthesis error

• Duty cycle of 45/55

• Operating voltage of 3.3 V

• Advanced, low power CMOS process

Block Diagram

X1/ICLK

X2

PLL1

PLL2

Crystal

Oscillator/

Clock

Buffer

27 MHz

clock or

crystal

input

External capacitors

may be required.

VDD

GND

PDTS (all outputs and PLLs)

20M

ACLK

3

PLL3

33.0M

PLL4

24.576M

S1:0

2

48M

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