MC44145

Analog video signals out of the MC44011 are sampled and converted to 8bits digital in the A/D converter (MC44250 series) by means of the clock provided by the MC44145, pixel clock generator (see Figure 1).

The frame store contains the memory, the necessary logic for the memory addressing, as well as the counter to set the frequency multiplication ratio of the line locked clock generator (H. Count).

The MC44145, Pixel Clock Generator, is a component of the MC44000 family.

The MC44145 contains a sync separator with composite sync and vertical outputs, and clock generation circuitry for the digitization of any video signal along with the necessary circuitry for clock generation, such as a phase comparator and a divideby2 to provide a 50% duty cycle.

The MC44145 is available in a SO14 package and is fabricated in the Motorola high density, high speed, low voltage, process called MOSAIC 1.5)^®.