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.
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