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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
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Block Diagram
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Pin Assignment
44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 SOP-44B 1 2 3 4 5 6 7 8 9 10 11 V1-V V1-L V1-Y V1-R V1-C S1 V2-V V2-L V2-Y V2-R V2-C 12 13 14 15 16 17 18 19 20 21 22 S2 V3-V V3-L V3-R STV-V STV-L STV-R YIN2 ADR CIN2 GND 23 24 25 26 27 28 29 30 31 32 33 VOUT2 ROUT2 COUT2 LOUT2 YOUT2 GND SDA SCL MUTE CIN1 GND 34 35 36 37 38 39 40 41 42 43 44 YIN1 ROUT1 LOUT1 VOUT1 BIAS YOUT1 VCC COUT1 MTV-R MTV-V MTV-L
Pin Description
Pin No. Pin name 1 3 7 9 13 16 19 34 43 2 4 8 10 14 15 17 18 42 44 V1-V V1-Y V2-V V2-Y V3-V STV-V YIN2 YIN1 MTV-V V1-L V1-R V2-L V2-R V3-L V3-R STV-L STV-R MTV-R MTV-L Audio input terminal Functions Video input terminal (Composite or Y) Internal equivalet circuit diagram
*Sync chip clamp
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Pin No. Pin name 5 11 21 32 V1-C V2-C CIN2 CIN1 (Croma)
Functions Video input terminal
Internal equivalet circuit diagram
6 12
S1 S2
Distinction 3-effects input terminal DC Detect
20 31
ADR Mute
Sleve address select Audio Mute terminal
22 28 33 23 37
GND
GND
VOUT2 VOUT1
Composite video out
24 26 35 36
ROUT2 LOUT2 ROUT1 LOUT1
Audio out terminal
25 27 39 41
COUT2 YOUT2 YOUT1 COUT1
S -Video out terminal
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Pin No. Pin name 29 SDA
Functions Data input from I C
2
Internal equivalet circuit diagram
30
SCL
CLK input from I2C
38
BIAS
Internal bias terminal
40
VCC
VCC
Absolute Maximum Ratings
Item Storage temperature Operating temperature Power supply voltage Allowable loss
(Ta=25C) Symbol TSTG TOPR VCCmax. Pd Ratings -40~+125 -20~+75 12 1100 Units C C V mW
Recommended Operating Conditions
Item Operating temperature Operating voltage Symbol TOPR VOP Ratings -20~+75 +8~+10 Units C V
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Electrical Characteristics
Item Current consumption VOUT1 Voltage gain Frequency characteristics Differential gain Differential phase Input dynamic ranges VOUT2 Voltage gain Frequency characteristics Differential gain Differential phase Input dynamic range YOUT1 Voltage gain Frequency characteristics Differential gain Differential phase Input dynamic range Output impedance YOUT2 Voltage gain Frequency characteristics Differential gain Differential phase Input dynamic range Output impedance COUT1 Voltage gain Frequency characteristics Differential gain Differential phase Input dynamic range Input impedance Output impedance
(Except where noted otherwise, VCC=9V, Ta=25C) Measurement conditions No signal SIN wave : 1VP-P 100kHz SIN wave : 1VP-P 10MHz/100kHz Staircase signal 1VP-P Staircase signal 1VP-P SIN wave : 100kHz THD=1.0% SIN wave : 1VP-P 100kHz SIN wave : 1VP-P 10MHz/100kHz Staircase signal 1VP-P Staircase signal 1VP-P SIN wave : 100kHz THD=1.0% Vn-Y : SIN wave 1VP-P 100kHz YIN1 : SIN wave 2VP-P 100kHz Vn-Y : SIN wave 1VP-P YIN1 : SIN wave 2VP-P Vn-Y : Staircase signal 1VP-P YIN1 : Staircase signal 2VP-P Vn-Y : Staircase signal 1VP-P YIN1 : Staircase signal 2VP-P Vn-Y : SIN wave 100kHz THD=1.0% YIN1 : SIN wave 100kHz THD=1.0% Min. Typ. Max. Units 39 55 71 mA 5.5 -1.0 -3 -3 1.4 5.5 -1.0 -3 -3 1.4 5.5 -0.5 -1.0 -1.0 -3 -3 -3 -3 1.4 3.2 6.0 0.0 0 0 1.5 6.0 0.0 0 0 1.5 6.0 0.0 0.0 0.0 0 0 0 0 1.5 3.8 (50) 6.0 0.0 0.0 0.0 0 0 0 0 1.5 3.8 (50) 6.0 0.0 0.0 0.0 0 0 3.25 6.5 15 (50) 6.5 1.0 3 3 dB dB % deg VP-P dB dB % deg VP-P dB dB dB dB % % deg deg VP-P VP-P dB dB dB dB % % deg deg VP-P VP-P dB dB dB dB % deg VP-P VP-P k
Symbol ICC GV1 fV1 DGV1 DPV1 DV1 GV2 fV2 DGV2 DPV2 DV2 GY1 GY2 fY1 fY2 DGY1 DPY1 DY1 DY2 ZOY1 GY3 GY4 fY3 fY4 DGY2 DPY2 DY3 DY4 ZOY2 GC1 GC2 fC1 fC2 DGC1 DPC1 DC1 DC2 ZIC1 ZOC1
6.5 1.0 3 3
6.5 0.5 1.0 1.0 3 3 3 3
Vn-Y : SIN wave 1VP-P 100kHz YIN2 : SIN wave 2VP-P 100kHz Vn-Y : SIN wave 1VP-P YIN2 : SIN wave 2VP-P Vn-Y : Staircase signal 1VP-P YIN2 : Staircase signal 2VP-P Vn-Y : Staircase signal 1VP-P YIN2 : Staircase signal 2VP-P Vn-Y : SIN wave 100kHz THD=1.0% YIN2 : SIN wave 100kHz THD=1.0%
5.5 -0.5 -1.0 -1.0 -3 -3 -3 -3 1.4 3.2
6.5 0.5 1.0 1.0 3 3 3 3
Vn-C : SIN wave 1VP-P 100kHz CIN1 : SIN wave 2VP-P 100kHz Vn-C : SIN wave 1VP-P CIN1 : SIN wave 2VP-P CIN1 : Staircase signal 2VP-P CIN1 : Staircase signal 2VP-P Vn-Y : SIN wave 100kHz THD=1.0% YIN1 : SIN wave 100kHz THD=1.0% Vn-C and CIN1
5.5 -0.5 -1.0 -1.0 -3 -3 2.75 5.5 10
6.5 0.5 1.0 1.0 3 3
20
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Item COUT2 Voltage gain Frequency characteristics Differential gain Differential phase Input dynamic range Input impedance Output impedance LOUT1 Voltage gain Frequency characteristics Total harmonic distortion Input dynamic range Output offset voltage Input impedance Output impedance LOUT2 Voltage gain Frequency characteristics Total harmonic distortion Input dynamic range Output offset voltage Output impedance ROUT1 Voltage gain Frequency characteristic Total harmonic distortion Input dynamic range Output offset voltage Input impedance Output impedance ROUT2 Voltage gain Frequency characteristics Total harmonic distortion Input dynamic range Output offset voltage Output impedance
Symbol GC3 GC4 fC3 fC4 DGC2 DPC2 DC3 DC4 ZIC2 ZOC2 GL1 GL2 fL1 THDL1 DL1 VOFFL1 ZIL1 ZOL1 GL3 GL4 fL2 THDL2 DL2 VOFFL2 ZOL2 GR1 GR2 fR1 THDR1 DR1 VOFFR1 ZIR1 ZOR1 GR3 GR4 fR2 THDR2 DR2 VOFFR2 ZOR2
Measurement conditions Vn-C : SIN wave 1VP-P 100kHz CIN2 : SIN wave 2VP-P 100kHz Vn-C : SIN wave 1VP-P CIN2 : SIN wave 2VP-P CIN1 : Staircase signal 2VP-P CIN2 : Staircase signal 2VP-P Vn-Y : SIN wave 100kHz THD=1.0% YIN2 : SIN wave 100kHz THD=1.0% CIN2
Min. Typ. Max. Units 5.5 -0.5 -1.0 -1.0 -3 -3 2.75 5.5 10 6.0 0.0 0.0 0.0 0 0 3.25 6.5 15 (50) 6.5 0.5 1.0 1.0 3 3 dB dB dB dB % deg VP-P VP-P k
20
SIN wave 2.5VP-P 1kHz -6dB Select SIN wave 2.5VP-P 1kHz 0dB Select SIN wave 2.5VP-P 1MHz/1kHz SIN wave 2.5VP-P 1kHz SIN wave 1kHz THD<0.5% DC offset at the switching time
-6.5 -0.5 -3.0 2.6 42
-6.0 -5.5 dB 0.0 0.5 dB 0.0 1.0 dB 0.03 0.1 % 2.8 Vrms 0 15 mV 60 78 k (120) -6.0 -5.5 dB 0.0 0.5 dB 0.0 1.0 dB 0.03 0.1 % 2.8 Vrms 0 15 mV (120) -6.0 -5.5 dB 0.0 0.5 dB 0.0 1.0 dB 0.03 0.1 % 2.8 Vrms 0 15 mV 60 78 k (120) -6.0 -5.5 dB 0.0 0.5 dB 0.0 1.0 dB 0.03 0.1 % 2.8 Vrms 0 15 mV (120)
SIN wave 2.5VP-P 1kHz -6dB Select SIN wave 2.5VP-P 1kHz 0dB Select SIN wave 2.5VP-P 1MHz/1kHz SIN wave 2.5VP-P 1kHz SIN wave 1kHz THD<0.5% DC offset at the switching time
-6.5 -0.5 -3.0 2.6
SIN wave 2.5VP-P 1kHz -6dB Select SIN wave 2.5VP-P 1kHz 0dB Select SIN wave 2.5VP-P 1MHz/1kHz SIN wave 2.5VP-P 1kHz SIN wave 1kHz THD<0.5% DC offset at the switching time
-6.5 -0.5 -3.0 2.6 42
SIN wave 2.5VP-P 1kHz -6dB Select SIN wave 2.5VP-P 1kHz 0dB Select SIN wave 2.5VP-P 1MHz/1kHz SIN wave 2.5VP-P 1kHz SIN wave 1kHz THD<0.5% DC offset at the switching time
-6.5 -0.5 -3.0 2.6
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Item Symbol Crosstalk ( 1) VOUT1 CTV1 VOUT2 CTV2 YOUT1 CTY1 YOUT2 CTY2 COUT1 CTC1 COUT2 CTC2 LOUT1 CTL1 LOUT2 CTL2 ROUT1 CTR1 ROUT2 CTR2 Terminal voltage Video input terminal VVIP VOUT1/2 terminal VVOP YOUT1/2 terminal VYOP COUT1/2 terminal VCOP Audio input terminal VAIP Audio output terminal VAOP I2C condition (Refer to figure below) Input voltage L VIL Input voltage H VIH Low level output voltage VOL High level input current IIH Low level input current IIL Clock frequency fSCL Data transfer wait time tBUF SCL start hold time tHD : STA SCL low level hold time tLOW SCL high level hold time tHIGH SCL start setup time tSU : STA SDA data hold time tHD : DAT SDA data setup time tSU : DAT SCL rise-time tR SCL fall-time tF SCL stop setup time tSU : STO
Measurement conditions SG1 : 4.43MHz 1VP-P (At mix, SG2/3 input) SG1 : 4.43MHz 1VP-P(At mix, SG2/3 input) SG2 : 4.43MHz 1VP-P SG2 : 4.43MHz 1VP-P SG3 : 4.43MHz 1VP-P SG3 : 4.43MHz 1VP-P 1kHz 2.5VP-P 1kHz 2.5VP-P 1kHz 2.5VP-P 1kHz 2.5VP-P No signal, No load No signal, No load No signal, No load No signal, No load No signal, No load No signal, No load
Min. Typ. Max. Units -60 -60 -60 -60 -60 -60 -90 -90 -90 -90 4.6 3.9 3.2 3.2 4.0 3.9 0.0 3.0 0.0 -10 -10 4.7 4.0 4.7 4.0 4.7 200 250 4.9 4.2 3.5 3.5 4.3 4.2 -53 -53 -53 -53 -53 -53 -80 -80 -80 -80 5.2 4.5 3.8 3.8 4.6 4.5 1.5 5.0 0.4 10 10 100 dB dB dB dB dB dB dB dB dB dB V V V V V V
*
SDA sink 3mA SDA, SCL=4.5V SDA, SCL=0.4V
4.0
V V V V V kHz S S S S S nS nS 1000 nS 300 nS S
(The inside of parentheses is design guarantee value.)
I2C condition
SDA
t BUR SCL
tR
tF
P
S
t HD:STA t LOW
t HD:DAT
t HIGH t SU:DAT
t SU:STA
Sr
t SU:STO
P
MITSUMI (Note.1) :
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Input signal symbol Vn-V=MTV-V, V1-V, V2-V,V3-V, STV-V Vn-Y=V1-Y, V2-Y Vn-C=V1-C, V2-C (Note.2) : 1 Test Circuit of Crosstalk See Test Circuit 2 (Note.3) : Video inputs Vn-V, Vn-Y, and YINn inputs are sync chip clamped, while Vn-C and CINn inputs are non-clamped.
*
Measuring Circuit
Measuring Circuit 1
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Measuring Circuit 2 (Crosstalk measurement)
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
I2C BUS
SDA
SCL S 1 2 3 4 5 6 7 8 A 1 2 3 8 A 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.
S Slave address 1 0 0 1 0 R/W 0 0/1 0 A Control register 1 b7 b6 b5 b4 b3 b2 b1 b0 A Control register 2 b7 b6 b5 b4 b3 b2 b1 b0 A P
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 b2 b1 b0
Video out1 select Video out2 select
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.
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
[Status registers] Status registers are data to inform the device status. The data format is set as shown in the following figure. S Slave address 1 0 0 1 0 0 0/1 R/W 1 A Status register b7 b6 b5 b4 b3 b2 b1 b0 NA P
Address byte
device status
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 1 when data are used status registers. As MM1492 slave address, either 91H or 93H can be selected according to the ADR terminal conditions. When ADR terminal is L, 91H is selected. Set the confirmation acknowledgement after the end of status register to non-acknowledgement. The following figure shows the correspondence of the output data of status registers. b7 P-ON RESET b6 b5 S1 OPEN b4 S1 SEL b3 S2 OPEN b2 S2 SEL b1 b0
P-on RESET : 1 returns when the power on reset is done, 0 returns after reading data once. S1/S2 OPEN : S1/S2 OPEN and SEL are identified by 3 values, and output according to the S1/S2 SEL combinations in the following table.
DC voltage of S1/S2 0.8VS1/S2 OPEN 0 0 1
S1/S2 SEL 1 0 0
[about power on reset] MM1492 is provided with a power on reset function to reset each control register to 0 when power supply is turned on. The power on reset threshold has the hysteresis as shown in following figure.
Reset off
Reset on 4.3V 5.4V
VCC
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Switch Control Table
(1) Video output 1 b6 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 (2) Audio output 1 Mute terminal b2 0 0 0 <1.5V (OPEN) = 0 1 1 1 1 >3.0V = b1 0 0 1 1 0 0 1 1 b0 0 1 0 1 0 1 0 1 LOUT1 Mute MTV-L V1-L V2-L V3-L STV-L Mute Mute ROUT1 Mute MTV-R V1-R V2-R V3-R STV-R Mute Mute b5 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 b4 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 b3 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 VOUT1 Mute MTV-V V1-V V2-V V3-V STV-V Mute Mute MTV-V V1-(Y+C) V2-(Y+C) V3-V STV-V Mute YOUT1 Mute YIN1 YIN1 YIN1 YIN1 YIN1 Mute Mute YIN1 V1-Y V2-Y YIN1 YIN1 Mute COUT1 Mute CIN1 CIN1 CIN1 CIN1 CIN1 Mute Mute CIN1 V1-C V2-C CIN1 CIN1 Mute
(3) Audio gain b7 0 1 LOUT1 -6dB 0dB ROUT1 -6dB 0dB
MITSUMI
I2C BUS Controlled 5-Input 2-Output AV Switch MM1492AF
Application Circuit
Note. (1) VOUT is set to 4.2V, While CIN is set to 4.9V. Be careful since the capacity polarity may differ according to the comb filter bias. (2) Each audio output can be set to myte by setting pin 31 to high. The mute is turned off in when pin 19 is open or low.

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