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PDF MM1492AF Data sheet ( Hoja de datos )
| Número de pieza | MM1492AF | |
| Descripción | I2C BUS Controlled 5-Input 2-Output AV Switch | |
| Fabricantes | MITSUMI | |
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MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
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 I2C BUS line (SDA, SCL) power supply is off.
(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.
Package
SOP-44B
Applications
(1) TV
(2) Other video equipment
1 page  
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Pin No. Pin name
Functions
29 SDA Data input from I2C
Internal equivalet circuit diagram
30 SCL CLK input from I2C
38 BIAS Internal bias terminal
40 VCC VCC
Absolute Maximum Ratings (Ta=25°C)
Item
Storage temperature
Operating temperature
Power supply voltage
Allowable loss
Symbol
TSTG
TOPR
VCCmax.
Pd
Ratings
-40~+125
-20~+75
12
1100
Recommended Operating Conditions
Item
Operating temperature
Operating voltage
Symbol
TOPR
VOP
Ratings
-20~+75
+8~+10
Units
°C
°C
V
mW
Units
°C
V
5 Page 
MITSUMI
I2C BUS
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
SDA
SCL
S
12345678A123
8A P
S:Start Condition
P:Stop Condition
A:Acknowledge
I2C BUS is inter bus system controled by 2 lines (SDA, SCL).
Data are transmitted and received in the units of byte and Acknowledge.
It is transmitted by MSB first from the Start conditions.
[Control registers]
Control registers are data sent from the master for determining the switch conditions.
The data format is set as shown in the following figure.
Slave address
R/W
Control register 1
Control register 2
S A A AP
1 0 0 1 0 0 0/1 0
b7 b6 b5 b4 b3 b2 b1 b0
b7 b6 b5 b4 b3 b2 b1 b0
Address byte
Control data
Out of the Address byte, first 7bit are assigned to the slave address, while the residual 1bit is assigned to the
R/W bit.
Set the R/W bit to 0 when data are used control registers.
As MM1492 slave address, either 90H or 92H can be selected according to the ADR terminal conditions.
When ADR terminal is L, 90H is selected.
The following figure indicates the control contents of control registers and switches.
Each bit of control registers is reset to 0, when power-on.
Register
1
2
b7
Audio Gain 1
Audio Gain 2
b6
S/Comp select 1
S/Comp select 2
b5 b4 b3
Video out1 select
Video out2 select
b2 b1 b0
Audio out1 select
Audio out2 select
MM1492 consists of one address byte and two control data bytes (3bytes in total).
All data over the limited length (4th and subsequent bytes) are fully neglected.
For details of the control contents of switches, refer to the separate table.
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MM1492AF.PDF ] | |
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