ICS2572 datasheet(1/10 Pages) ICST

Nome de Peças	ICS2572

Descrição Electrónicos	User-Programmable Dual High-Performance Clock Generator

PDF	10 Pages

Scroll/Zoom	100%

Fabricante Electrônico	ICST [Integrated Circuit Systems]

Página de início	http://www.icst.com

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ICS2572RevC090894

Integrated

Circuit

Systems, Inc.

ICS2572

User-Programmable Dual High-Performance Clock Generator

Block Diagram

XTAL1

XTAL2

Crystal

Oscillator

Reference

Divider

Charge

Pump

Phase-

Frequency

Comparator

EXTFREQ

VCO

Prescaler

/M

Strobe

FS0

FS1

FS2

FS3

MS0

MS1

/A

MCLK PLL (as above)

VCLK Set &

Program

Mode

Interface

MCLK Set

/2

/4

/8

/2

/4

MCLK

CLK-

CLK+

LOAD

/1, 4, 5 or 8

/8

Description

The ICS2572 is a dual-PLL (phase-locked loop) clock gener-

ator with differential video outputs specifically designed for

high-resolution, high-refresh rate, video applications. The

video PLL generates any of 16 pre-programmed frequencies

through selection of the address lines FS0-FS3. Similarly, the

auxiliary PLL can generate any one of four pre-programmed

frequencies via the MS0 & MS1 lines.

A unique feature of the ICS2572 is the ability to redefine

frequency selections after power-up. This permits complete

set-up of the frequency table upon system initialization.

Features

•• Advanced ICS monolithic phase-locked loop

technology

•• Supports high-resolution graphics - differential CLK out-

put to 185 MHz

•• Divided dotclock output (LOAD) available

•• Simplified device programming

•• Sixteen selectable VCLK frequencies (all user

re-programmable)

•• Four selectable MCLK frequencies (all user

re-programmable)

•• Windows NT compatible

Applications

•• High end PC/low end workstation graphics designs

requiring differential output

•• X Terminal graphics

E-95

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