1

PS8794C

11/12/08

Features

• Precision clock generator for digital audio application

• One copy of Reference clock at 27 MHz

• Supports various audio sampling rates: 128x, 256x, 384x,

512x and 768x

• Support Crystal or Reference clock signal input

• Low Phase Noise: -75 dBc @ 100Hz

• Low Short Term Jitter: 175ps (typical)

• Low Long Term Jitter: 1.1ns (typical)

• Industrial Temperature Range (-40°C ~ +85°C)

• Packaging (Pb-Free & Green):

—16-pin TSSOP

Description

The PI6C6612 is a precision clock generator designed to provide

synchronous clock signals for digital audio applications with

sampling clock rates derived from an MPEG stream. The device

can also be used as a standalone clock source with a 27 MHz

crystal.

Split power supply pins and ground pins help to provide excel-

lent phase noise and long term jitter performance for superior

synchronization and Signal-to-Noise ratio.

PI6C6612 is one example of Pericom’s multimedia clock prod-

ucts, if you have other applications for custom clock designs,

either with different clock input or output that is not specified

here, please contact Pericom.

Block Diagram

PI6C6612

3.3V Precision Audio Clock Synthesizer

Output Clock Selection Table from 27 MHz input

S3

S2

S1

S0

Clock (MHz)

0

0

0

0

8.192

0

0

0

1

11.2896

0

0

1

0

12.288

0

0

1

1

24.576

0

1

0

0

9.216

0

1

0

1

16.9344

0

1

1

0

18.432

0

1

1

1

36.864

1

0

0

0

16.384

1

0

0

1

22.5792

1

0

1

0

5.6448

1

0

1

1

49.152

1

1

0

0

6.1440

1

1

0

1

33.8688

1

1

1

0

8.4672

1

1

1

1

73.728

PLL

XTAL

OSC

REF

X2

X1/REFIN

SELIN

S[3:0]

Clock

08-0298