KS82C670

The KS82C670/671 has 7 features.The first one is single/dual clock output versions.The second one is custom (ROM) programmed frequencies up to 100 MHz.The third one is "on-the-fly" frequency selection.The fourth one is separate on-chip phase locked loops.The fifth one is PLL oscillator input from system bus or 14.31818 MHz crystal.The sixth one is external frequency input operation up to 140MHz.The seventh one is low power 1 CMOS technology.

The KS82C670/671 are integrated graphics clock generators which can replace several oscillators and crystals in any application that requires dynamic frequency switch.In a graphics system,one of these devices can be used to generate frequencies for several resolutions.In P.C. VGA systems,all frequencies for previous generation modes,like EGA,CGA and MDA, can be provided in a sigle device.Up to 32 frequencies for the pixel clock,and up to 4 frequenencies for the memory clock can be specified via factory programmed ROM mask.Each of these frequencies can be accessed on-the-fly by supplying an input address to the device.If required by the application,power down modes and input latchinng functions are also available by choosing the appropriate pin configuration.

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