Overview

The LC74725 and LC74725M are built-in EDS on-screen display controller CMOS LSI products that display characters and patterns on a TV screen under microprocessor control. The characters displayed have an 8 × 8 dot format, and a dot interpolation function is provided. These LSIs can display ten lines of 24 characters each.

Features

• Display format: 24 characters by 10 lines (up to 240 characters)

• Character format: 8 (horizontal) × 8 (vertical) dots (interpolation function provided)

• Character sizes: Two horizontal and two vertical sizes

• Characters in font: 64 characters

• Initial display positions: 64 horizontal positions and 64 vertical positions

• Blinking: Specifiable on a per-character basis

• Blinking types: Two periods, 1.0 second and 0.5 second

• Blue background screen display: Available in internal synchronization mode

• External control input: 8-bit serial input format

• Built-in sync separator circuit

• EDS support

• Video outputs: Composite video signal output in either NTSC or PAL-M

• Package: 24-pin plastic DIP (300 mil)

24-pin plastic MFP (375 mil)