2-Input 1-Output 3-Circuit Video Switch MM1231~1234
2-Input 1-Output 3-Circuit Video Switch
Monolithic IC MM1231~1234
Outline
This is serial 2-input, 1-output, 3-circuit video switch IC for video / audio signal switching with and without
clamp circuit.
Circuit configuration tables and block diagrams are as follows.
MM1234 is used as the representative model in this description.
MM1231~MM1234 Series Circuit Configuration Table
Model name# of Inputs # of OutputsClamp circuit
MM123121No4.6~13.0V
MM1232211 input4.6~13.0V
MM1233212 input4.6~13.0V
MM1234213 input4.6~13.0V
Power supply voltage
MM1231~MM1234 Input/Output Voltage Measurement Values (typ.)
Model name
MM1231
MM1232
MM1233
Input / Output
voltage
Input voltage2.805.006.70V
Output voltage2.014.306.00V
Input voltage2.805.006.70V
Output voltage2.104.306.00V
Input clamp1.402.503.30V
Output voltage0.702.202.90V
Input voltage2.805.006.70V
Output voltage2.104.306.00V
Input clamp1.402.503.30V
Power supply voltage
Unit
5V9V12V
MM1234
Output voltage0.702.202.90V
Input clamp1.402.503.30V
Output voltage0.702.202.90V
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2-Input 1-Output 3-Circuit Video Switch MM1231~1234
Block Diagram
MM1231MM1232
MM1233MM1234
(MM1231~MM1234)
Control input truth table
SWOUT
IN1A
LIN2A
IN3A
IN1B
HIN2B
IN3B
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2-Input 1-Output 3-Circuit Video Switch MM1231~1234
Introduction of Main Model
2-Input 1-Output 3-Circuit Video Switch
Monolithic IC MM1234
Outline
This is a video switch for video signal switching, with 2-input and 1-output circuits built in. All three circuits
have a clamp function.
Features
1. 3 circuits built in, 2-input and 1-output
2. Clamp function
3. Current consumption9.0mA typ.
4. Operating power supply voltage range4.6~13.0V
5. Frequency response10MHz
6. Crosstalk70dB (at 4.43MHZ)
Package
SOP-16B
DIP-16B
Applications
1. TV
2. VCR
3. Other video equipment
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2-Input 1-Output 3-Circuit Video Switch MM1231~1234