ICS1574B

Integrated Circuit Systems, Inc. ICS1574B User Programmable Laser Engine Pixel Clock Generator Description The ICS1574B is a very high performance monolithic phaselocked loop (PLL) frequency synthesizer designed for laser engine applications. Utilizing ICS’s advanced CMOS mixedmode technology, the ICS1574B provides a low cost solution for high-end pixel clock generation for a variety of laser engine 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. 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 Block Diagram Figure 1 1574B 8/31/00 ICS1574B Pin Configuration PCLKEN XTAL1 XTAL2 DATCLK VSS VSS PCLK (Do Not Connect) Reserved 1 2 16 15 DATA HOLD TEST (Connect to VS...