DATASHEET

QUAD PLL WITH VCXO FOR HDTV

ICS477-05

IDT™ / ICS™ QUAD PLL WITH VCXO FOR HDTV

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ICS477-05

REV H 062404

Description

The ICS477-05 generates five high-quality,

high-frequency clock outputs including two reference

outputs from a low frequency pullable crystal. It is

designed to replace crystals and crystal oscillators in

most electronic systems.

Using Phase-Locked-Loop (PLL) techniques, the

device runs from a fundamental mode, pullable crystal.

It can replace multiple crystals and oscillators, saving

board space and cost.

Features

• Packaged in 28-pin SSOP (QSOP)

• Available in Pb-free packaging

• Replaces a VCXO plus multiple crystals and

oscillators

• On-chip patented VCXO pull range 200 ppm

(minimum)

• Duty cycle of 45/55

• Operating voltage of 3.3V

• Advanced, low power, CMOS process

• Input crystal frequency of 27 MHz

• Five output clocks

• Industrial temperature range available

Block Diagram

X1

X2

PLLA

PLLC

PLLB

Voltage

Controlled

Crystal

Oscillator

Divide

Logic

and

Output

Enable

Control

27 MHz

Pullable

Crystal

External capacitors

may be required

PLLD

VDD

GND

PDTS

VIN

10

27M

54M

74.175M

54.054M

6

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