Overview
The LC74794 and LC74794M are CMOS LSIs for on-
screen display, a function that displays characters and
patterns on a TV screen under microprocessor control.
They feature a built-in PDC/VPS/UDT interface circuit.
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: 1.0 second and
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
— Blue background only: NTSC
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 and AFC circuits
PDC/VPS/UDT interface circuit
Composite video output in the PAL or NTSC format
Package Dimensions
unit: mm
3196-DIP30SD
unit: mm
3216A-MFP30S
CMOS LSI
Ordering number : EN*5557
22897HA (OT)/No. 5557-1/30
Preliminary
SANYO: DIP30SD
[LC74794]
SANYO: MFP30S
[LC74794M]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
On-Screen Display Controller LSI
LC74794, 74794M