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MK2722-01S

Sigma Designs Clock Source

Integrated Circuit Systems 

MK2722

Sigma Designs Clock Source

Description

Features

The MK2722 is a low cost, low jitter, high performance

clock synthesizer designed for Sigma Designs’ MPEG

decoder systems. Using analog Phase-Locked Loop

(PLL) techniques, the device accepts a 27 MHz crystal

or clock input to produce multiple output clocks. The

power down pin turns off the device, drawing less than

100 µA.

ICS offers a wide variety of clock synthesizers for

desktop and portable computers, and multimedia

systems. Consult ICS to eliminate crystals and

oscillators from your board.

• Packaged in 16 pin narrow (150 mil) SOIC

• Uses 27 MHz crystal or clock input

• Zero ppm synthesis error in all clocks (audio clocks

exactly track 27 MHz video clock)

• Audio clock supports 32, 44.1, and 48kHz

sampling rates at 256X and 384X

• Power down turns off chip

• Low jitter

• Total of four output clocks

• 25 mA output drive capability at TTL levels

• 5V±10% supply voltage (contact ICS for

3.3V operation)

• Advanced, low power, sub-micron CMOS process

Block Diagram

PD

AS1:0

BS1:0

27 MHz crystal

or clock

X1

X2

2

2

Crystal

Oscillator

VDD GND

3

2

Clock

Synthesis and

Control Circuitry

Output

Buffer

Output

Buffer

Output

Buffer

Output

Buffer

ACLK

BCLK

BCLK/2

27.0000 MHz

MDS 2722 B

1

Revision 020802

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

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