ICS1574B Datasheet, PDF (1/12 Pages) Integrated Circuit Systems – User Programmable Laser Engine Pixel Clock Generator

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