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AV1574BM

User Programmable Laser Engine Pixel Clock Generator

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

ICS1574B

User Programmable Laser Engine Pixel Clock Generator

Description

The ICS1574B is a very high performance monolithic phase-

locked loop (PLL) frequency synthesizer designed for laser

engine applications. Utilizing ICS’s advanced CMOS mixed-

mode technology, the ICS1574B provides a low cost solution

for high-end pixel clock generation for a variety of laser en-

gine product applications.

The pixel clock output (PCLK) frequency is derived from the

main clock by a programmable resettable divider.

Operating frequencies are fully programmable with direct

control provided for reference divider, feedback divider and

post-scaler.

Block Diagram

Features

• Supports high resolution laser graphics. PLL/VCO

frequency re-programmable through serial interface

port to 400 MHz; allows less than ±1.5ns pixel clock

resolution.

• Laser pixel clock output is synchronized with

conditioned beam detect input

• Ideal for laser printer, copier and FAX pixel clock

applications

• On-chip PLL with internal loop filter

• On-chip XTAL oscillator frequency reference

• Resettable, programmable counter gives glitch-free

clock alignment

• Single 5 volt power supply

• Low power CMOS technology

• Compact – 16-pin 0.150" skinny SOIC package

• User re-programmable clock frequency supports

zoom and gray scale functions

1574B 8/31/00

Figure 1

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