MITSMI MM1268 Datasheet

MITSUMI

RGB Encoder

Monolithic IC MM1268

Outline

This IC converts analog RGB signals into chroma, Y+S and composite video signals.

Features

1. Operates on 5V single power supply

2. Supports NTSC and PAL formats

3. Supports S (Y, C output)

4. 75Ω driver output (RGB output, Y, C output, composite video output)

5. Built-in BRF and delay circuits

Package

SOP-24A

RGB Encoder MM1268

Applications

1. PCs

2. Game equipment

3. Other video equipment

Equivalent Circuit Diagram

MITSUMI

RGB Encoder MM1268

Pin Description

Pin no. Pin name Function Internal equivalent circuit diagram

1 GND1

2 RIN

3 GIN

4 BIN

RGB input pins

Maximum input voltage is 1V

DC level is 2V during clamp

P-P

5 NC

6 SC

IN

7 NTSC/PAL

8 BFPOUT

OPEN

Subcarrier input pin

Input a 0.4V~5V

P-P sine wave

Mode setting pin

NTSC : V

CC

PAL : GND

Burst flag pulse monitor pin

MITSUMI

RGB Encoder MM1268

9 Yclp

10 SYNCIN

11 NC

12 VCC1

13 Iref

Connects to capacitor for Y signal

clamp

Composite sync signal input pin

OPEN

Determines internal reference

14 Vref

current

Connect a 47kΩ resistor between

this pin and ground

Internal reference voltage pin

Reference voltage is 4V

Connect a 10µF capacitor between

this pin and ground.