SANYO LC74760M, LC74760 Datasheet

Ordering number : EN4453A

13096HA (OT)/73093JN (OT) No. 4453-1/14

Overview

The LC74760 and LC74760M are on-screen display
CMOS ICs that superimpose text and low-level graphics
onto a TV screen (video signal) under microprocessor
control. The display characters have a 12 by 18 dot
structure, and 128 characters are provided. The display
area consists of 12 lines of 24 characters each.

Features

• Display structure: 12 lines by 24 characters (up to 288
characters)

• Number of displayed characters: Up to 288 characters

• Character configuration: 12 (W) by 18 (H) dot structure

• Character sizes: Three sizes (normal, double, and triple
sizes)

• Display starting positions: 64 horizontal and 64 vertical
locations

• Reverse video function: Characters can be inverted on a
per character basis.

• Flashing types: Two types with periods of 0.5 and 1.0
second on a per character basis (duty fixed at 50%)

• Background color: One of eight colors (when internal
synchronization used)

• External control input: Serial data input in 8-bit units

• Built-in horizontal/vertical sync separation circuit, AFC
circuit, and synchronization detector

• Video output: Composite video signal output in NTSC,
PAL, PAL-M, PAL-N, PAL60, NTSC4.43, or SECAM
format

Package Dimensions

unit: mm

3061-DIP30S

unit: mm

3073A-MFP30S

SANYO:DIP30S

[LC74760]

SANYO: MFP30S

[LC74760M]

LC74760, 74760M

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN

On-Screen Display IC

CMOS IC

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Condition Rating Unit

Maximum supply voltage V

DD

max V

DD1

, V

DD2

pins VSS– 0.3 to VSS+ 7.0 V

Maximum input voltage V

IN

max All input pins VSS– 0.3 to VDD+ 0.3 V

Maximum output voltage V

OUT

max

HSYNC

OUT

, VSYNC

OUT

,

V

SS

– 0.3 to VDD+ 0.3 V

SYNC

DET

pins
Allowable power dissipation Pd max 300 mW
Operating temperature Topr –30 to +70 °C
Storage temperature Tstg –40 to +125 °C

Allowable Operating Ranges at Ta = –30 to +70°C

Rating

Parameter Symbol Condition

min typ max

Unit

Supply voltage

V

DD1

V

DD1

pin 4.5 5.0 5.5 V

V

DD2

V

DD2

pin 4.5 5.0 1.27 V

DD1

V

Input high level voltage

V

IH1

RST, CS, SIN, SCLK pins 0.8 V

DD1

V

DD1

+ 0.3 V

V

IH2

SECAM, 525/625,

0.7 V

DD1

V

DD1

+ 0.3 V

NTSC/PAL, 3.58/4.43 pins

Input low level voltage

V

IL1

RST, CS, SIN, SCLK VSS– 0.3 0.2 V

DD1

V

V

IL2

SECAM, 525/625,

VSS– 0.3 0.3 V

DD1

V

NTSC/PAL, 3.58/4.43 pins

Input voltage V

IN

FC, AMPINpins VSS– 0.3 V

DD1

+ 0.3 V

V

IN1

CVIN pins 2 V

PP

V

Composite video signal input voltage V

IN2

CVCRpins 2 V

PP

V

V

IN3

SYNCINpins 2 V

PP

2.5 V

PP

V

Oscillator frequency

F

OSC1

Xtal

IN1

, Xtal

OUT1

pins; 4fsc: NTSC 14.318 MHz

Xtal

IN2

, Xtal

OUT2

pins; 4fsc: PAL 17.734 MHz

F

OSC2

Xtal

IN2

, Xtal

OUT2

pins; 4fsc: PAL-M 14.302 MHz

Xtal

IN2

, Xtal

OUT2

pins; 4fsc: PAL-N 14.328 MHz

Electrical Characteristics at Ta = –30 to +70°C, with V

DD1

= V

DD2

= 5 V unless otherwise specified

Rating

Parameter Symbol Condition

min typ max

Unit

Output off leakage current I

leak1

CV

OUT

pin 10 µA

Input off leakage current I

leak2

CVIN, CVCRpins 10 µA

Output high level voltage V

OH

HSYNC

OUT

, VSYNC

OUT

,

3.5 V

SYNC

DET

, SECAM, 525/625,

NTSC/PAL, 3.58/4.43, AMP

OUT

,

PD

OUT

pins; V

DD1

= 4.5 V, IOH= –1.0 mA

Output low level voltage V

OL

HSYNC

OUT

, VSYNC

OUT

,

1.0 V

SYNC

DET

, SECAM, 525/625,

NTSC/PAL, 3.58/4.43, AMP

OUT

,

PD

OUT

pins; V

DD1

= 4.5 V, IOL= 1.0 mA

Input current

I

IH

RST, CS, SIN, SCLK, SECAM, 525/625,

1 µA

NTSC/PAL, 3.58/4.43 pins; V

IN

= V

DD1

I

IL

SECAM, 525/625, NTSC/PAL,

–1 µA

3.58/4.43 pin; V

IN

= V

SS1

Oscillator frequency F

OSC3

VCOIN, VCO

OUT

pins; FC = 1/2 V

DD1

14.12 MHz

Operating current dissipation

I

DD1

V

DD1

pin; All outputs open, Xtal: 4fsc 15 mA

I

DD2

V

DD2

pin; V

DD2

= 5.0 V 20 mA

Timing Characteristics at Ta = –30 to +70°C, VDD= 5 ±0.5 V

Rating

Parameter Symbol Condition

min typ max

Unit

Minimum input pulse width

t

W(SCLK)

SCLK pin 200 ns

t

W(CS)

CS pin (during periods when CS is high) 1 µs

Data setup time

t

SU(CS)

CS pin 200 ns

t

SU(SIN)

SIN pin 200 ns

Data hold time

t

h(CS)

CS pin 2 µs

t

h(SIN)

SIN pin 200 ns

One word write time

t

word

Write time for 8 bits of data 4.2 µs

t

wt

RAM data write time 1 µs

No. 4453-2/14

LC74760, 74760M

Pin Functions

Pin No. Symbol Function Description

1 V

SS

Ground Ground connection

2 Xtal

IN1

Crystal oscillator connection

Connection for the crystal and capacitor used to form the crystal oscillator that generates

3 Xtal

OUT1

the internal synchronization signal. (For an NTSC crystal oscillator 4fsc = 14.318 MHz.)

4 HSYNC

OUT

Horizontal synchronization Outputs the horizontal synchronization signal (AFC). The polarity can be selected with a
output metal switch.

5 Xtal

IN2

Crystal oscillator connection

Connection for the crystal and capacitor used to form the crystal oscillator that generates

6 Xtal

OUT2

the internal synchronization signal. (For a PAL crystal oscillator 4fsc = 17.734 MHz.)

7 VSYNC

OUT

Vertical synchronization output Outputs the vertical synchronization signal. The polarity can be selected with a metal switch.

8 CS Enable input

Enables/disables serial data input. Serial data is enabled when this pin is low. Pull-up
resistor built in (hysteresis input).

9 SIN Data input Serial data input. Pull-up resistor built in (hysteresis input).

10 SCLK Clock input Clock input for serial data input. Pull-up resistor built in (hysteresis input).
11 SECAM SECAM mode switch input

Switches between SECAM and other modes.
Low = other modes, high = SECAM mode

12 525/625 525/625 switch input

Switches between 525 scan lines and 625 scan lines.
Low = 525 lines, high = 625 lines

13 NTSC/PAL NTSC/PAL switch input

Switches the color mode between NTSC and PAL.
Low = NTSC, high = PAL

14 3.58/4.43 3.58/4.43 switch input

Switch FSC between 3.58 MHz and 4.43 MHz.
Low = 3.58, high = 4.43

15 RST Reset input

System reset input pin, low is active (reset).
Pull-up resistor built in (hysteresis input).

16 CV

OUT

Video signal output Composite video output

17 V

DD2

Power supply connection Power supply connection for composite video signal level generation

18 CV

IN

Video signal input Composite video input

19 CV

CR

Video signal input SECAM chroma signal input

20 SYNC

IN

Sync separator circuit input Built-in sync separator circuit video signal input

21 SEP

C

Sync separator circuit Built-in sync separator circuit (AMP out)

22 V

SS

Ground Ground connection

23 PD

OUT

Control voltage output AFC control voltage output

24 AMP

IN

AFC filter connection Filter connection

25 AMP

OUT

26 FC Control voltage input AFC control voltage input
27 VCO

IN

LC oscillator connection VCO LC oscillator circuit coil and capacitor connection

28 VCO

OUT

29 SYNC

DET

External synchronization signal Outputs the exclusive NOR of the horizontal synchronization signal (AFC) and CSYNC (sync
detection output separator).

30 V

DD1

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

No. 4453-3/14

LC74760, 74760M

Pin Assignment

Serial Data Input Timing

No. 4453-4/14

LC74760, 74760M

System Block Diagram

No. 4453-5/14

LC74760, 74760M