Overview

The LC74780 and LC74780M are CMOS, video display controllers for superimposing text and low-level graphics onto an NTSC, PAL or PAL-M compatible television receiver. Up to 288, 12 × 18-pixel characters can be displayed under microprocessor control on a 24-character by 12-line display.

The LC74780 and LC74780M feature selectable pixel width and height, and 64 vertical and 64 horizontal display start positions. It also features a flashing enable bit for each character position.

The LC74780 and LC74780M operate from a 5V supply. The LC74780 is available in 24-pin DIPs, and the LC74780M, in 24-pin MFPs.

Features

■ Complete text and graphics vide overlay circuitry.

■ 128-character internal character generator ROM.

■ 12 × 18-pixel characters.

■ Three pixel widths and three pixel heights.

■ Selectable background color.

• 8 colors at 4fSC (NTSC/PAL/PAL-M)

• 4 colors at 2fSC (NTSC)

■ Built-in synchronization check and separation circuitry.