Dual Video/Memory Clock Generator The Dot Clock Generator is an integrated circuit dual phaselocked loop frequency synthesizer capable of generating sixteen video dot clock frequencies and eight memory clock frequencies for use with high performance video display systems. Utilizing CMOS technology to implement all linear, digital and memory functions, the ICS2494/94A provides a low-power, small-footprint, low-cost solution to the generation of video dot clocks. Outputs are compatible with XGA, VGA, EGA, MCGA, CGA, MDA, as well as the higher frequencies needed for advanced applications in desktop publishing and workstation graphics. Provision is made via a single-level custom mask to implement customer-specific frequency sets. Phase-locked loop circuitry permits rapid glitch-free transitions between clock frequencies.