Integrated
Circuit
Systems, Inc.
ICS1522
DATA SHEET
ICS1522
User-Programmable Video Clock Generator/ Line-
User-ProgrammableVideoClockGenerator/Line-Locked
Locked Clock Regenerator
Clock Regenerator
General Description
Features
•
Serial programming: Feedback and reference divisors,
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.
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
The ICS1522 has differential video clock outputs (CLK+
and CLK-) that are compatible with industry standard
video DAC.
Fully-programmable synthesizer capability - not just a
clock multiplier
Line-locked clock generation capability;
15 - 100 kHz
Operating frequencies are fully programmable with direct
control provided for reference divider, feedback divider
and postscaler.
•
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
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
1522 RevG 021005
IDT™ / ICS™ User-Programmable Video Clock Generator/ Line-Locked Clock Regenerator
ICS1522
and accurate.
1
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
