SANYO LC74772V Datasheet

Overview

The LC74772V is a CMOS LSI that implements on-screen display for camcorders. It displays characters and patterns in a camcorder viewfinder under microprocessor control. The LC74772V displays a 12 × 18 dot font with 256 characters.

Features

• Screen format: 12 lines ¥ 24 characters (up to 288 characters)

• Number of characters displayed: Up to 288 characters

• Character format: 12 (horizontal) × 18 (vertical) dots

• Number of characters in font: 256 characters

• Character sizes: Normal and double, specified in line units

• Display start position — Horizontal: 64 positions — Vertical: 64 positions

• Character reverse video function: Individual characters can be displayed in reverse video.

• Types of blinking: Two types with periods of 1.0 and

0.5 seconds, specifiable on a per character basis. (Blinking has a 60% display on duty.) (Four divisors: 1/25, 1/30, 1/50, 1/60)

• Outputs: R, G, B plus 2 output systems Or: 4 output systems (character data and blanking data: 4 outputs each)

• External control input: 8-bit serial data input format

Package Dimensions

unit: mm

3175A-SSOP24

CMOS LSI

O3096HA(OT)/D3095HA (OT) No. 5159-1/16

SANYO: SSOP24

[LC74772V]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

Camcorder On-Screen Display LSI

LC74772V

Ordering number : EN5159A

Parameter Symbol Conditions Ratings Unit

Supply voltage V

VSS– 0.3 to VSS+ 7.0 V

Input voltage V

All input pins VSS– 0.3 to VDD+ 0.3 V

Output voltage V

OUT

, CHA4, BLK4, CHA3, BLK3, B, G, R, BLANK VSS– 0.3 to VDD+ 0.3 V Allowable power dissipation Pd max Ta = 25°C 300 mW Operating temperature Topr –30 to +70 °C Storage temperature Tstg –40 to +125 °C

Specifications

Absolute Maximum Ratings

No. 5159-2/16

LC74772V

Parameter Symbol Conditions

Ratings

Unit

min typ max

Supply voltage V

2.7 5.0 5.5 V

Input high-level voltage V

CTRL1, TESTIN, CS, SCLK, SIN, OUT

MOD

, HSYNC,

0.8 V

VDD+ 0.3 V

VSYNC, RST

Input low-level voltage V

CTRL1, TESTIN, CS, SCLK, SIN, OUT

MOD

, HSYNC,

– 0.3 0.2 V

VSYNC, RST

Oscillator frequency F

OSC

OSCIN, OSC

OUT

(LC oscillator) 6 (8) 10 MHz

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

Parameter Symbol Conditions

Ratings

Unit

min typ max

OUT

, CHA4, BLK4, CHA3, BLK3, B, G, R, BLANK:

Output high-level voltage V

VDD= 5.5 to 4.5 V (VDD= 4.4 to 2.7 V), IOH= –1.0 mA 0.9 V

(–0.5 mA) CK

OUT

, CHA4, BLK4, CHA3, BLK3, B, G, R, BLANK:

Output low-level voltage V

VDD= 5.5 to 4.5 V (VDD= 4.4 to 2.7 V), IOL= 1.0 mA 0.1 V

(0.5 mA)

CTRL1, TESTIN, CS, SCLK, SIN, OUT

MOD

, HSYNC,

1 µA

Input current

VSYNC: V

= V

CTRL1, TESTIN, HSYNC, VSYNC: VIN= V

–1 µA

Operating current drain I

VDDpin; all outputs open, LC oscillator: 8 MHz 10 mA

Electrical Characteristics at Ta = –30 to +70°C, unless otherwise specified VDD= 5 V

Parameter Symbol Conditions

Ratings

Unit

min typ max

Minimum input pulse width

W (SCLK)

SCLK 200 ns

W (CS)

CS (the period that CS is high) 1 µs

Data setup time

SU (CS)

CS 200 ns

SU (SIN)

SIN 200 ns

Data hold time

h (CS)

CS 2 µs

h (SIN)

SIN 200 ns

One-word write time

word

The time to write 8 bits of data 4.2 µs

The RAM data write time 1 µs

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

Serial Data Input Timing

Pin Assignment

The signal names in parentheses indicate the output pin functions when 4-system output mode is used.

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Pin Functions

PinNo. Symbol Function Description

1 V

Ground Ground connection

2 OSC

LC oscillator

Connections for the coil and capacitor that form the oscillator that generates the character

3 OSC

OUT

output horizontal dot clock.

4 CTRL1 Clock input control

Control input that switches between LC oscillator mode and clock input mode Low: LC oscillator mode, high: clock input mode

5 TEST

Test control input Test mode control input (The IC operates in test mode when this input is high.)

6 CS Enable input

Serial data input enable input

Low: active (This input has hysteresis characteristics.) 7 SCLK Clock input Serial data input clock input (This input has hysteresis characteristics.) 8 SIN Data input Serial data input (This input has hysteresis characteristics.)

9 CK

OUT

Clock output

LC oscillator clock monitor output

This signal is output when RST is low.

10 BLK4 Blanking signal output

Blanking signal output (system 2)

Functions as the system 4 blanking data signal output in 4-system mode.

11 CHA4 Character data output

Character data signal output (system 2)

Functions as the system 4 character data signal output in 4-system mode.

12 NC Unused Must be left open or tied to ground in normal operation. 13 NC Unused Must be left open or tied to ground in normal operation.

14 BLK3 Blanking signal output

Blanking signal output (system 1)

Functions as the system 3 blanking data signal output in 4-system mode.

15 CHA3 Character data output

Character data signal output (system 1)

Functions as the system 3 character data signal output in 4-system mode.

16 BLANK Blanking signal output

Blanking signal output (blanking signal for RGB output)

Functions as the system 2 blanking data signal output in 4-system mode.

17 R Character data output

Character data (R) signal output

Functions as the system 2 character data signal output in 4-system mode.

18 G Character data output

Character data (G) signal output

Functions as the system 1 blanking data signal output in 4-system mode.

19 B Character data output

Character data (B) signal output

Functions as the system 1 character data signal output in 4-system mode.

20 OUT

MOD

Output control input

Control input that switches between RGB output and 4-system output

Low: RGB output, high 4-system output

21 VSYNC

Vertical synchronizing

Vertical synchronizing signal input (This input has hysteresis characteristics.)

signal input

22 HSYNC Horizontal synchronizing

Horizontal synchronizing signal input (This input has hysteresis characteristics.)

signal input

23 RST Reset input System reset signal input (This input has hysteresis characteristics.) 24 V

Power supply Power supply connection (+5 V)

Note: 1. Built-in pull-up resistors can be specified for inclusion in the CS (pin 6), SCLK (pin 7), SIN (pin 8), and RST (pin 23) pins as mask options.

2. In clock input mode (when CTRL1 is high), the function that holds the OSC

(pin 2) pin high during an oscillator reset is stopped.

Block Diagram

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