Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
CMOS IC
On-Screen Display Controller
for NTSC-Format Video
Ordering number:ENN
*4088
LC7471
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
81001TN (KT)/5182JN(US) No.4088–1/12
Overview
The LC7471 is a video display controller for superimpos-
ing text and low-level graphics onto an NTSC-format tele-
vision receiver. The LC7471 incorporates a 64 character
internal character generator ROM, a 24-character
× 64-line
display ROM and a 176-character display RAM. Up to 288,
12
× 18-pixel characters can be displayed under micropro-
cessor control on a 24-character by 12-line display.
The LC7471 features selectable pixel width and pixel
height, and 64 vertical and 64 horizontal display start posi-
tions. It also features a flashing enable bit for each charac-
ter position.
The LC7471 operates from a 5 V supply and is available in
22-pin shrink DIPs.
Features
Complete text and graphics video overlay circuitry.
64-character internal character generator ROM.
24-character
× 64-line display ROM.
176-character display RAM.
288-character display capability.
12
× 18-pixel characters.
Four pixel widths.
Four pixel heights.
Selectable background color.
Approximately 0.5 or 1 s period character flashing op-
tion.
25, 50 or 75% flashing duty cycle.
Internal or external synchronization.
Serial data control.
5 V supply.
22-pin shrink DIP.
21.2
0.95
0.48
1.7
1.78
3.9max
0.51min
6.4
7.62
3.3
3.25
0.25
111
22
12
Package Dimensions
unit:mm
3059-DIP22S
[LC7471]
SANYO : DIP22S
Pin Assignment
Preliminary
Top view