ICS614-01

16 pin Intel Graphics Clock Source

MDS 614-01 B

1

Revision 020199

Printed 11/14/00

Integrated Circuit Systems • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • (408) 295-9818fax

I C R O

PRELIMINARY INFORMATION

The ICS614-01 is a low cost, low jitter, high

performance clock synthesizer for Intel’s i752

graphics systems. It includes frequencies for video

encoders and decoders. Using analog Phase-

Locked Loop (PLL) techniques, the device accepts

a 27 MHz fundamental mode crystal or clock

input to produce multiple output clocks. The chip

provides highly accurate video encoder and

decoder clocks, as well as the 48 MHz necessary

for the Intel graphics processor, and can produce a

24.576 MHz audio clock.

See the ICS604 or ICS513 for 8 pin devices that

supply 48 MHz from a 14.31818 MHz input.

Block Diagram

Description

Features

• Packaged in 16 pin SOIC

• Uses fundamental 27 MHz input crystal

• Supports Intel i752 graphics chip, popular video

encoders and decoders, and audio

• Low jitter - 50 ps one sigma

• Output Enable function tri-states outputs

• 25mA output drive capability at TTL levels

• Advanced, low power, sub-micron CMOS process

• 5V±10% core voltage. Inputs and outputs can run

3.3V (or 5V) for easy system interface

Crystal

Oscillator

VDD

GND

Clock Synthesis

and Control

Circuitry

Output

Buffer

27 MHz crystal

Output

Buffer

48 MHz

Output

Buffer

ACLK

X2

X1

2

28.636 MHz or

35.4689 MHz

Output Enable (all outputs)

Output

Buffer

27 MHz

ASEL1:0

2

DSEL

Output

Buffer

13.5 MHz

Output

Buffer

14.318 MHz or

17.7344 MHz

÷2

÷2

VDDIO