Overview

The LC74721 and LC74721M are CMOS, video display controllers for superimposing text and low-level graphics onto an NTSC or PAL-M compatible television receiver. Up to 240, 8 × 8-pixel characters can be displayed under microprocessor control on a 24-character by 10-line display.

Features

• Complete text and graphics vide overlay circuitry.

• 64-character internal character generator ROM.

• 8 × 8-pixel characters.

• Three pixel widths and three pixel heights.

• Selectable background color.

• Built-in synchronization check and separation circuitry.

• Approximately 0.5 or 1 s period character flashing option.

• NTSC or PAL-M format compatibility.

• 8-bit serial input format.

• 5V supply.

• 24-pin plastic DIP (300mil) and 24-pin plastic MFP (375mil).