MITSUMI
2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228
2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver)
Monolithic IC MM1221~MM1228
Outline
These ICs are high grade video switches with 2-input 1-output or 3-input 1-output and built-in 75Ω driver.
The series includes those with and without built-in clamp and 6dB amp circuits.
Circuit configuration tables and block diagrams are as follows.
MM1228 is used as the representative model in this description.
MM1221~MM1228 Series Circuit Configuration Table
Model name
MM1221
MM1222
MM1223
MM1224
MM1225
MM1226
MM1227
MM1228
# of Inputs
2
2
3
3
2
2
3
3
# of Outputs
1
1
1
1
1
1
1
1
6dB amp circuit
No
Yes
No
Yes
No
Yes
No
Yes
Clamp circuit
No
No
No
No
Yes
Yes
Yes
Yes
Power supply voltage range
8~13V
8~13V
8~13V
8~13V
4.7~13V
4.7~13V
4.7~13V
4.7~13V
MM1221~MM1228 Input/Output Voltage Measurement Values (typ.)
Model name
Power supply
voltage
Input voltage
Output voltage
Input voltage
Output voltage
Input voltage
Output voltage
Input voltage
Output voltage
Input voltage
Output voltage
Input voltage
Output voltage
Input voltage
Output voltage
Input voltage
Output voltage
1.27
1.31
1.3
1.4
1.27
1.31
1.3
1.4
5V
9V
4.53
4.5
4.05
5.34
4.53
4.5
4.05
5.34
2.17
2.25
2.2
2.23
2.17
2.25
2.2
2.23
12V
6.05
6.1
5.4
7.12
6.05
6.1
5.4
7.12
2.86
2.96
2.9
2.88
2.86
2.96
2.9
2.88
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
MM1221
MM1222
MM1223
MM1224
MM1225
MM1226
MM1227
MM1228
MITSUMI
2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228
Block Diagram
(MM1221~MM1228)
Control input truth table
SW
L
H
OUT
IN1
IN2
Control input truth table
SW
L
H
OUT
IN1
IN2
Control input truth table
SW1
L
H
L/H
SW2
L
L
H
OUT
IN1
IN2
IN3
SW1
L
H
L/H
Control input truth table
SW2
L
L
H
OUT
IN1
IN2
IN3
MITSUMI
2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228
Control input truth table
SW
L
H
OUT
IN1
IN2
Control input truth table
SW
L
H
OUT
IN1
IN2
Control input truth table
SW1
L
H
L/H
SW2
L
L
H
OUT
IN1
IN2
IN3
SW1
L
H
L/H
Control input truth table
SW2
L
L
H
OUT
IN1
IN2
IN3
MITSUMI
2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228
Introduction of Main Model
3-Input 1-Output Video Switch (with 75Ω driver, clamp and 6dB amp)
Monolithic IC MM1228
Outline
This is a high performance 3-input 1-output video switch IC with 6dB amp, clamp and 75Ω driver circuits.
Output is 75Ω, and a 1V
P-P
video signal can be output externally.
Features
1.
2.
3.
4.
5.
6.
7.
8.
9.
Built-in 75Ω driver circuit
Built-in 6dB amp
Built-in clamp circuit
Models in the MM1221~MM1228 series without clamp circuits able to support audio or chroma circuits
Mute operation possible
Wide operating power supply voltage range
4.7~13V
Low current consumption
Wideband frequency response
7MHz @ 0dB
Crosstalk
-70dB (4.43MHz)
Package
SOP-8C (MM1228XF)
SIP-8A (MM1228XS)
Applications
1.
2.
3.
4.
TV
VCR
Video cameras
Other video equipment
Block Diagram
Control input truth table
SW1
L
H
L/H
SW2
L
L
H
OUT
IN1
IN2
IN3
MITSUMI
2-Input 1-Output Video Switch (75Ω driver)/3-Input 1-Output Video Switch (75Ω driver) MM1221~1228
Pin Description
Pin no.
1
3
5
Pin name
IN1
IN2
IN3
Function
Input
Internal equivalent circuit diagram
2
4
SW1
SW2
Switch
7
OUT
Output
6
8
V
CC
GND
Power supply
Ground
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