MK2704

PLL Audio Clock Synthesizer

MDS 2704 A

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Revision 062700

I C R O

PRELIMINARY INFORMATION

Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com

Block Diagram

Description

Features

The MK2704 is a low cost, low jitter, high

performance PLL clock synthesizer designed to

replace oscillators and PLL circuits in set-top box

and multimedia systems. Using our patented

analog Phase-Locked Loop (PLL) techniques, the

device uses a fundamental 27 MHz crystal or clock

input to produce a buffered reference clock and a

selectable audio clock. The audio clock is

frequency locked to the 27 MHz clock, assuring

that the audio with zero ppm error and video will

always track perfectly.

• Packaged in 8 pin SOIC

• Uses an inexpensive fundamental crystal, or clock

• Output clocks of 16.9344 MHz, 18.432 MHz,

and 36.864 MHz

• Supports 384x MPEG sampling rates of 44.1 kHz,

48 kHz and 96 kHz

• Patented zero ppm synthesis error in all clocks

• All frequencies are frequency locked

• Advanced, low power, sub-micron CMOS process

• 3.3 V or 5 V operating voltage

27 MHz

crystal or

clock

X2

X1

(Capacitors are required for crystal tuning)

Crystal

Oscillator

VDD

GND

PLL

Clock

Synthesis

and

Control

Circuitry

Output

Buffer

CLK

Output

Buffer

27.000 MHz

S1:0

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