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Part Number: LC74794
Description: The LC74794 and LC74794M are CMOS LSIs for onscreen display, a function that displays characters and p...
- Table of contents:
LC74794
-
Suppliers
DataSheet
General Description
LC74794 General Description
The LC74794 and LC74794M are CMOS LSIs for onscreen 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.
LC74794 Maximum Ratings
|
Parameter |
Rating |
SYMBOL |
UNIT | Conditions | |
|
Supply voltage |
VSS 0.3 to VSS + 7.0 |
VDD |
V |
VDD1 and VDD2 | |
|
Input voltage |
VSS 0.3 to VDD + 0.3 |
VIN |
V |
All input pins | |
|
Output voltage |
VSS 0.3 to VDD + 0.3 |
VOUT |
V |
DAV, DOUT, SEPOUT, and SYNCJDG | |
|
Allowable power dissipation |
350 |
Pd max j |
mW |
||
|
Operating temperature |
30 to +70 |
Topr |
°C |
||
|
Storage temperature |
40 to +125 |
Tstg |
°C |
- | |
LC74794 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 andvertical 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 synchronization mode): 4fsc
- Line background coloring: 6 colors (internal synchronization 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
• Character format: 12 (horizontal) ´ 18 (vertical) dots
• Character sizes: Three sizes each in the horizontal andvertical 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 synchronization mode): 4fsc
- Line background coloring: 6 colors (internal synchronization 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
LC74794 Connection Diagram
LC74794
PDF/DataSheet Download
- Datasheet: LC74794
- File Size: 222643 KB
- Manufacturer: SANYO [Sanyo Semicon Device]
- Click here to Download
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