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548G-05

MP3 Audio Clock

Integrated Circuit Systems 

PRELIMINARY INFORMATION

ICS548-05A

MP3 Audio Clock

Description

The ICS548-05 is a low cost, low jitter, high

performance clock synthesizer designed to

produce audio sampling rates for MP3 systems.

Using ICS’ patented analog/digital Phase-Locked

Loop (PLL) techniques, the device uses an

inexpensive 3.6864 MHz crystal or clock input to

exactly produce all of the popular audio sampling

frequencies. Power down modes allow the chip to

be turned off completely, or the PLL and audio

clock output to be turned off separately.

ICS manufactures the largest variety of

multimedia clock synthesizers for all applications.

Consult ICS to eliminate VCXOs, crystals and

oscillators from your board.

Features

• Packaged in 16 pin TSSOP

• Ideal for Cirrus Logic’s MP3 chips

• Replaces multiple oscillators

• 3.3V (will work down to 2.7V) or 5V operation

• Uses an inexpensive 3.6864 MHz crystal or

clock input

• Supports 32 kHz, 44.1 kHz, 48 kHz, and 96 kHz

audio sampling rates

• Provides 128fs and 256fs clocks

• Zero ppm synthesis error

• Includes Power Down features

• Advanced, low power, sub-micron CMOS process

Block Diagram

S3:S0

REFEN

PDCLK

X1

3.6864 MHz

crystal or clock

X2

4

Crystal

Oscillator

Optional crystal capacitors

PLL/Clock

Synthesis

Circuitry

Output

Buffer

CLK

Output

Buffer

REFOUT

MDS 548-05 AC

1

Revision 032900

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

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