Integrated

Circuit

Systems, Inc.

General Description

Features

•

Serial programming: Feedback and reference divisors,

VCO gain, phase comparator gain, relative phase and

test modes.

•

Supports high-resolution graphics - Differential CLK

out-puts to 230 MHz

•

Eliminates need for multiple ECL output voltage control-

led crystal oscillators and external components

•

Fully-programmable synthesizer capability - not just a

clock multiplier

•

Line-locked clock generation capability;

15 - 100 kHz

•

External feedback loop capability allows graphics

system to be used as the feedback divisor with

synchronous switchover to internal feedback

•

Small footprint 24-pin SOIC

•

Coarse and fine phase adjustment permits precise

clocking in video recovery application

Applications

•

LCD Projector Systems

•

Multimedia video line locking

•

Genlock applications

1522RevF050697P

User-ProgrammableVideo Clock Generator/ Line-Locked

Clock Regenerator

ICS1522

The ICS1522 is a very high performance monolithic phase-

locked loop (PLL) frequency synthesizer. Utilizing ICS’s

advanced CMOS mixed-mode technology, the ICS1522

provides a low-cost solution for high-end video clock

generation where synchronization to an external video

source is required.

The ICS1522 has differential video clock outputs (CLK+

and CLK-) that are compatible with industry standard

video DAC.

Operating frequencies are fully programmable with direct

control provided for reference divider, feedback divider

and postscaler.

Block Diagram

ICS reserves the right to make changes in the device data identified in this publication

without further notice. ICS advises its customers to obtain the latest version of all

device data to verify that any information being relied upon by the customer is current

and accurate.