Overview

The LC74723 and LC74723M are on-screen display controller CMOS LSIs that display characters and patterns on a TV screen under microprocessor control. Characters are 8 × 8 dots, and a dot interpolation function is provided. The LC74723 can display 24 characters × 10 lines of text.

Features

• Screen structure: 24 characters × 10 lines (up to 240 characters)

• Character structure: 8 (horizontal) × 8 (vertical) (interpolation function supported)

• Character sizes: Two horizontal and two vertical sizes

• Number of characters: 64

• Display start position: 64 horizontal and 64 vertical positions

• Blinking: In character units

• Blinking types: Two, with periods of 0.5 and 1.0 seconds

• Blue background screen display: (in internal synchronization mode)

• External control inputs: 8-bit serial input interface

• Built-in sync separator circuit

• Video output: Compound NTSC and PAL-M output

• Packages: 24-pin plastic MFP (375 mil)

24-pin plastic DIP (300 mil)