Overview
The LC74787, LC74787M, and LC74787JM are on-screen display controller CMOS ICs that display characters and patterns on the TV screen under microprocessor control. These ICs support 12 Ã 18 dot characters and can display 12 lines by 24 characters of text.
Features
⢠Display format: 24 characters by 12 rows (Up to 288
characters)
⢠Character format: 12 (horizontal) à 18 (vertical) dots
⢠Character sizes: Three sizes each in the horizontal and
vertical directions
⢠Characters in font: 256 (254 characters, one spacing
character, and one transparent spacing character)
⢠Initial display positions: 64 horizontal positions and 64
vertical positions
⢠Blinking: Specifiable in character units
⢠Blinking types: Two periods supported: About 1.0
second and about 0.5 second
⢠Blanking: Over the whole font (12 à 18 dots)
⢠Background color: 8 colors (internal synchronization
mode): 2fSC and 4fSC
⢠Line background color
â Can be set for 3 lines
â Line background color: 8 colors (internal
synchronization mode): 2fSC and 4fSC
⢠External control input: 8-bit serial input format
⢠On-chip sync separator circuit
⢠Video outputs: NTSC, PAL, PAL-N, PAL-M, NTSC
4.43, and PAL60 format composite video outputs
⢠Package
â 24-pin plastic DIP-24S (300 mil)
â 24-pin plastic MFP-24 (375 mil)
â 24-pin plastic MFP-24S (300 mil)
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