LC74785 Datasheet, PDF (1/24 Pages) Sanyo Semicon Device – On-Screen Display Controller LSI

Ordering number : EN5520A
CMOS LSI
LC74785, LC74785M
On-Screen Display Controller LSI
Overview
The LC74785 and LC74785M are on-chip EDS CMOS
LSIs for on-screen display, a function that displays
characters and patterns on a TV screen under
microprocessor control. These LSIs support 12 × 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) × 18 (vertical) dots
• Character sizes: Three sizes each in the horizontal and
vertical directions
• Characters in font: 128
• 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 × 18 dots)
• Background color
— Background coloring: 8 colors (internal synchronization
mode): 4fsc
— Background coloring: 6 colors (internal synchronization
mode): 2fsc
• Line background color
— Can be set for 3 lines
— Line background coloring: 8 colors (internal synchro-
nization mode): 4fsc
— Line background coloring: 6 colors (internal synchro-
nization mode): 2fsc
• External control input: 8-bit serial input format
• On-chip sync separator circuit
• EDS support
• Video output
— NTSC-format composite output
• Package
24-pin plastic DIP (300 mil)
24-pin plastic SOP (375 mil)
Package Dimensions
unit: mm
3067-DIP24S
[LC74785]
unit: mm
3045B-MFP24
[LC74785M]
SANYO: DIP24S
SANYO: MFP24
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
63097HA (OT) No. 5520-1/24