MITSUMI
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
MM1231~MM1234 Input/Output Voltage Measurement Values (typ.)
Model name
# of Inputs
# of Outputs
Clamp circuit
Power supply voltage
MM1231
2
1
No
4.6~13.0V
MM1232
2
1
1 input
4.6~13.0V
MM1233
2
1
2 input
4.6~13.0V
MM1234
2
1
3 input
4.6~13.0V
Model name
Input / Output
Power supply voltage
Unit
voltage
5V
9V
12V
MM1231
Input voltage
2.80
5.00
6.70
V
Output voltage
2.01
4.30
6.00
V
Input voltage
2.80
5.00
6.70
V
MM1232
Output voltage
2.10
4.30
6.00
V
Input clamp
1.40
2.50
3.30
V
Output voltage
0.70
2.20
2.90
V
Input voltage
2.80
5.00
6.70
V
MM1233
Output voltage
2.10
4.30
6.00
V
Input clamp
1.40
2.50
3.30
V
Output voltage
0.70
2.20
2.90
V
MM1234
Input clamp
1.40
2.50
3.30
V
Output voltage
0.70
2.20
2.90
V
MITSUMI
2-Input 1-Output 3-Circuit Video Switch MM1231~1234
Block Diagram
(MM1231~MM1234)
Control input truth table
SW
OUT
IN1A
L
IN2A
IN3A
IN1B
H
IN2B
IN3B
MM1231
MM1232
MM1233
MM1234
MITSUMI
2-Input 1-Output 3-Circuit Video Switch MM1231~1234
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 consumption
9.0mA typ.
4. Operating power supply voltage range
4.6~13.0V
5. Frequency response
10MHz
6. Crosstalk
70dB (at 4.43MHZ)
Package
SOP-16B
DIP-16B
Applications
1. TV
2. VCR
3. Other video equipment
Introduction of Main Model
MITSUMI
2-Input 1-Output 3-Circuit Video Switch MM1231~1234
Pin Description
Pin no.
Pin name
Function
Internal equivalent circuit diagram
16
IN1A
Input
1
IN1B
11
IN2A
14
IN2B
8
IN3A
9
IN3B
2
SW1
Switch
12
SW2
7
SW3
15
GND1
Ground
4
GND2
10
GND3
3
OUT1
Output
5
OUT2
6
OUT3
13
V
CC
Power supply
MITSUMI
2-Input 1-Output 3-Circuit Video Switch MM1231~1234
Absolute Maximum Ratings
(Ta=25C)
Electrical Characteristics
(Except where noted otherwise, Ta=25C, V
CC
=5.0V)
Item
Symbol
Measurement conditions
Min. Typ. Max. Units
Operating power supply voltage range
V
CC
4.6
13.0
V
Consumption current
Id
Refer to Measuring Circuit
9.0
11.7
mA
Voltage gain
G
V
Refer to Measuring Circuit
-0.5
0
+0.5
dB
Frequency characteristic
F
C
Refer to Measuring Circuit
-1
0
+1
dB
Differential gain
DG
Refer to Measuring Circuit
0
3
%
Differential phase
DP
Refer to Measuring Circuit
0
3
deg
Output offset voltage
Voff
Refer to Measuring Circuit
15
mV
Crosstalk
C
T
Refer to Measuring Circuit
-70
-60
dB
Switch input voltage H
V
IH
Refer to Measuring Circuit
2.1
V
Switch input voltage L
V
IL
Refer to Measuring Circuit
0.7
V
Output impedance
Ro
25
Item
Symbol
Ratings
Units
Storage temperature
T
STG
-40~+125
C
Operating temperature
T
OPR
-20~+75
C
Power supply voltage
V
CC
15
V
Allowable loss
Pd
350 (SOP-16B)
1200 (DIP-16B)
mW
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