Ordering number : ENN

6526

63000RM (OT) No. 6526-1/38

Overview

The LC74731W and LC74732W are on-screen display
CMOS ICs that display characters and patterns on a TV
screen under the control of a microcontroller. These ICs
display 16

16-dot characters and up to 12 lines of text

with 24 characters per line.

Features

· Text structure: 12 lines

24 characters (Up to 288

characters)

· Character format: 16

16 dots

Character display clock frequency: about 9 MHz

· Character sizes: Four sizes each in the horizontal and

vertical directions with the size set in line units.

· Number of characters supported:

LC74731W:256 (internal)
LC74732W:512 (internal)
Up to 8192 using an external ROM (for Japanese)
[Reference]

JIS X0298 (1990): 6877 characters
JIS level 1 kanji: 2965 characters
JIS level 2 kanji: 3388 characters
Special characters: 524 characters

· Display start positions: 128 positions each in the

horizontal and vertical directions

· Blinking, reverse video, reversed blinking, and character

outlining: May be specified in individual character units.

· Blinking types: Two types with periods of about 1.0 and

about 0.5 seconds.

· Blanking: The whole font area (16

16 dots) can be

blanked in line units
(Four types: no blanking, character size blanking,
character plus outlining size blanking, and whole area up
to adjacent character blanking)

· Line spacing control: Zero to seven scan lines, in line

units

· Character color: Eight colors in character units (in

internal synchronization mode): 2 fsc and 4 fsc
(Black, red, green, yellow, blue, magenta, cyan, and
white)

· Character background color: Eight colors (in internal

synchronization mode): 2 fsc and 4 fsc
(Black, red, green, yellow, blue, magenta, cyan, and
transparent)

· Screen background color: Eight colors (in internal

synchronization mode): 2 fsc and 4 fsc
(Black, red, green, yellow, blue, magenta, cyan, and
white)

· External control inputs: Serial interface with an 8-bit

data size.

· Built-in sync separator circuit
· Video outputs: NTSC, PAL, PALM, PALN, NTSC

4.43, and PAL 60 composite video signal outputs

· Supports Y/C input

Package Dimensions

Preliminary

LC74731W,74732W

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

On-Screen Display Controller

CMOS IC

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.

10.0

12.0

1.25

0.5

1.25

0.5

1.25

0.18

12.0

10.0

0.5

1.7max

0.5

0.1

0.15

SANYO: SQFP64

[LC74731W,74732W]

No. 6526-3/38

LC74731W,74732W

Pin Functions

Pin No.

Function

Description

Ground

Ground connection. (Digital system ground)

Xtalin

Crystal oscillator connections

Connections for the crystal element and capacitors that form the internal sync signal generating

Xtalout

crystal oscillator. Xtalin can also be used to input an external clock signal. (2fsc or 4fsc)

CTRL1

Switches the crystal oscillator Selects external clock input mode or crystal oscillator mode. Low: crystal oscillator mode, high:
input

external clock input mode.

OSCin

LC oscillator connections

Connections for the coil and capacitor that form the character output dot clock generation oscillator.

OSCout

This is an active-low input with hysteresis characteristics (MORE+).
When low, the

MUTE

Muting control input

CVout, Yout, and Cout outputs are set to either,

(1) CSYNC,

CSYNC,

PE,

(2)

PE,

PE.

In the initial state, (1) is selected. This setting is switched by commands.

CDLR

Background color phase

Connection for the resistor used to adjust the background color phase

adjustment

Outputs the result of the judgment as to whether or not the external sync signal is present.

SYNCJDG

External sync signal judgment A high level is output when a sync signal is present.

/Rout

output (Rout output)

The dot clock (LC oscillator) is output when RST is low.
(The IC can be set up to not output this signal during resets by commands.)

CHARA/Gout

Character output

Character signal output

(Gout output)

BLANK/Bout

Blank output (Bout output)

Blank signal output pin

IEout/BLKout

Internal/external output

Internal synchronization (high)/external synchronization (low) state output pin

(BLKout output)

OUTMOD

Output switching input

Switches between output from pins 9 to 12 and input to pin 32.
Low: normal operation, high: RGB output supported

Serial data input enable

Enable input

Serial data input is enabled when low.
more+ (Hysteresis input characteristics)

SIN

Data input

Serial data input
more+ (Hysteresis input characteristics)

SCLK

Clock input

Serial data input clock input
more+ (Hysteresis input characteristics)

Power supply

Composite video signal level adjustment power supply. (Analog system power supply)

COUT

Color signal output

Color (C) signal output

This pin must either be left open or connected to ground.

CIN

Color signal input

Color (C) signal input

CBIAS

Chrominance bias output

Chrominance signal bias level output

This pin must be either left open or connected to ground.

YOUT

Luminance signal output

Luminance signal (Y) output

This pin must be either left open or connected to ground.

YIN

Luminance signal input

Luminance signal (Y) input

Ground

CVOUT

Video signal output

Composite video signal output

This pin must either be left open or connected to ground.

CVIN

Video signal input

Composite video signal input

CVCR

Video signal input

SECAM chrominance signal input

HFTin

Halftone signal input

SYNin

Sync separator circuit input

Video signal input to the internal sync separator circuit

SEPout

Composite sync signal output Composite sync signal output from the internal sync separator circuit

SEPin

Vertical sync signal input

Vertical sync signal input
MORE+ (Hysteresis input characteristics)

RST

Reset input

System reset input
A built-in pull-up resistor can be included in this pin's input circuit. (Hysteresis input characteristics)

Power supply (+5 V)

Power supply (+5 V: digital system power supply)

Continued on next page.

No. 6526-4/38

LC74731W,74732W

Continued from preceding page.

Pin No.

Function

Description

A17

Address output 17

ROM address output 17

A16

Address output 16

ROM address output 16

A15

Address output 15

ROM address output 15

A14

Address output 14

ROM address output 14

A13

Address output 13

ROM address output 13

A12

Address output 12

ROM address output 12

A11

Address output 11

ROM address output 11

A10

Address output 10

ROM address output 10

Address output 9

ROM address output 9

Address output 8

ROM address output 8

Address output 7

ROM address output 7

Address output 6

ROM address output 6

Address output 5

ROM address output 5

Address output 4

ROM address output 4

Address output 3

ROM address output 3

Address output 2

ROM address output 2

Address output 1

ROM address output 1

Address output 0

ROM address output 0

Output enable

ROM output enable output. This is an active-low output.

Chip enable

ROM chip enable output. This is an active-low output.

Data input 7

ROM data input 7. MORE+ (Hysteresis input characteristics)

Data input 6

ROM data input 6. MORE+ (Hysteresis input characteristics)

Data input 5

ROM data input 5. MORE+ (Hysteresis input characteristics)

Data input 4

ROM data input 4. MORE+ (Hysteresis input characteristics)

Data input 3

ROM data input 3. MORE+ (Hysteresis input characteristics)

Data input 2

ROM data input 2. MORE+ (Hysteresis input characteristics)

Data input 1

ROM data input 1. MORE+ (Hysteresis input characteristics)

Data input 0

ROM data input 0. MORE+ (Hysteresis input characteristics)

No. 6526-5/38

LC74731W,74732W

Specifications

Maximum Ratings

at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

min

max

Supply voltage

1 and V

0.3

+ 6.5

Input voltage

All input pins

0.3

1 + 0.3

Output voltage

OUT

SYNCJDG, BLANK, CHARA, SEPOUT, A0 to A17,

0.3

1 + 0.3

CE, and OE

Allowable power dissipation

Pdmax

275

Operating temperature

Topr

+70

°C

Storage temperature

Tstg

+125

°C

Parameter

Symbol

Conditions

Ratings

Unit

min

typ

max

Supply voltage

4.5

5.0

5.5

4.5

5.0

6.5

Supply voltage

2.7

5.0

5.5

[Only for RGB output]

2.7

5.0

6.5

CS, SIN, SCLK, SEPIN, and MUTE

0.8 V

5.5

High-level input voltage

RST

0.8 V

1 + 0.3

CTRL1 and OUTMOD

0.7 V

1 + 0.3

D0 to D7

0.8 V

5.5

RST, CS, SIN, SCLK, SEPIN, and MUTE

0.3

0.2 V

Low-level input voltage

CTRL1 and OUTMOD

0.3

0.3 V

D0 to D7

0.3

0.2 V

Pull-up resistor

RST, CS, SIN, SCLK, and MUTE (when the pull-up

resistor option is specified)

Composite video signal input

CVIN and CVCR

1 = 5 V

2.0

Vp-p

voltage

SYNIN

1 = 5 V

1.5

2.0

2.5

Vp-p

Input voltage

XtalIN (when an external clock input is used)

1 = 5 V

5.0

Vp-p

fin = 2 fsc, 4 fsc

The XtalIN and XtalOUT oscillator pins (2 fsc: NTSC)

7.159

MHz

OSC1

The XtalIN and XtalOUT oscillator pins (4 fsc: NTSC)

14.318

MHz

Oscillator frequency

The XtalIN and XtalOUT oscillator pins (2 fsc: PAL)

8.867

MHz

The XtalIN and XtalOUT oscillator pins (4 fsc: PAL)

17.734

MHz

OSC2

The OSCin and OSCout oscillator pins (LC oscillator)

MHz

Recommended Operating Conditions

Note: If the Xtalin pin is used in clock input mode, applications must take adequate input noise prevention and reduction measures.

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