MITSMI MM1492AF Datasheet
2
C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
MITSUMI
I
I2C BUS Controlled 5-Input 2-Output AV Switch
Monolithic IC MM1492AF
Outline
This IC is a 5-input 2-output AV switch controlled by the I2C BUS developed for use in television. Because
there are 2 outputs, it supports 2 screens and P-IN-P, and also supports an external output (monitor) pin.
Features
(1) Serial control by I2C BUS
(2) 5 inputs, 2 outputs
(3) 1 Y/C (S pin) inputs, 2 outputs
(4) The video and audio switches can be controlled independently
(5) Built-in 6dB amp for video
(6) Built-in Y/C (S pin) mix circuit
(7) One of the two audio outputs has a built-in -6dB ON/OFF switch
(8) Slave address can be changed. 90H and 92H possible.
(9) Audio muting from external pin possible
(10) Maintains high impedance even when I
(11) Built-in 3 value discrimination function built-in
(12) Built-in power ON reset function
(13) Supports 2 screens and P-IN-P. Also supports external output (monitor) pin.
2
C BUS line (SDA, SCL) power supply is off.
Package
SOP-44B
Applications
(1) TV
(2) Other video equipment
MITSUMI
Block Diagram
2
C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
I
2
SOP-44B
136924587
10 11
44 40 3743 41 39 38 3642 341233133214311530162917281827192620252124222335
C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
MITSUMI
I
Pin Assignment
1 V1-V 12 S2 23 VOUT2 34 YIN1
2 V1
3 V1
4 V1
5 V1
6 S1 17 STV
7 V2
8 V2-L 19 YIN2 30 SCL 41 COUT1
9 V2
10 V2
11 V2
-
L 13 V3-V 24 ROUT2 35 ROUT1
-
Y 14 V3-L 25 COUT2 36 LOUT1
-
R 15 V3-R 26 LOUT2 37 VOUT1
-
C 16 STV-V 27 YOUT2 38 BIAS
-
L 28 GND 39 YOUT1
-
V 18 STV-R 29 SDA 40 VCC
-
Y 20 ADR 31 MUTE 42 MTV-R
-
R 21 CIN2 32 CIN1 43 MTV-V
-
C 22 GND 33 GND 44 MTV-L
Pin Description
Pin No.
Pin name
1 V1
3 V1
7 V2
9 V2
13 V3
16 STV
19 Y
34 Y
43 MTV
2 V1
4 V1
8 V2
10 V2
14 V3
15 V3
17 STV
IN2
IN1
-
V Video input terminal
-
Y (Composite or Y)
-
V
-
Y
-
V
-
V
-
V
-
L Audio input terminal
-
R
-
L
-
R
-
L
-
R
-
L
Sync chip clamp
*
Functions Internal equivalet circuit diagram
18 STV
42 MTV
44 MTV
-
R
-
R
-
L
MITSUMI
2
C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
I
Pin No.
Pin name
5 V1
11 V2
21 C
32 C
-
C Video input terminal
-
C (Croma)
IN2
IN1
Functions Internal equivalet circuit diagram
6 S1 Distinction 3-effects input terminal
12 S2 DC Detect
20 ADR Sleve address select
31 Mute Audio Mute terminal
22 GND GND
28
33
23 V
37 V
24 R
26 L
35 R
36 L
25 C
27 Y
39 Y
41 C
OUT2 Composite video out
OUT1
OUT2 Audio out terminal
OUT2
OUT1
OUT1
OUT2S
OUT2
OUT1
OUT1
-
Video out terminal
MITSUMI
2
C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
I
Pin No.
Pin name
29 SDA Data input from I
30 SCL CLK input from I
38 BIAS Internal bias terminal
Functions Internal equivalet circuit diagram
2
C
2
C
40 V
Absolute Maximum Ratings
CC VCC
(Ta=25°C)
Item Symbol Ratings Units
Storage temperature T
Operating temperature T
Power supply voltage V
STG
OPR
CCmax. 12 V
Allowable loss Pd 1100 mW
Recommended Operating Conditions
Item Symbol Ratings Units
Operating temperature T
Operating voltage V
-
40~+125 °C
-
20~+75 °C
OPR
OP +8~+10 V
-
20~+75 °C
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