mm1454 Mitsumi Electronics, Corp., mm1454 Datasheet

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mm1454

Manufacturer Part Number
mm1454
Description
Q Surround Processor
Manufacturer
Mitsumi Electronics, Corp.
Datasheet

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MITSUMI
Outline
Features
Package
Applications
Absolute Maximum Ratings
This is an analog IC virtual surround processor that faithfully reproduces the sound algorithm developed by Q
SOUND Labs, Inc.
In particular, when a stereo signal (L/Rch) encoded by Dolby Pro Logic is input to this IC, a virtual rear speaker
is created spatially, and this allows reproduction of realistic, 3-dimensional sound from two speakers, without
the addition of another speaker.
Q Xpander technology allows deep, spatially wide sound for input of normal stereo signals, as well.
*
*
*
*
1. Virtual rear speakers allow reproduction of 3-dimensional sound through only two speakers when a Pro
2. Also reproduces wide sound for a normal stereo source.
3. 2ch input - 2ch output.
4. Few external parts due to use of the active filter created using Mitsumi's bipolar technology.
5. Low noise design
6. Simple structure results in small size and low cost.
SOP-16B
1. TV, VCR
2. Audio equipment
3. Computer monitors
4. Active speaker systems
Virtual Dolby sound is a system developed by Dolby Labs, Inc. that reproduces realistic Pro Logic sound
with just two front left and right speakers, so there is no need for the additional two rear speakers and
center speaker normally required for Pro Logic sound.
Dolby and Dolby Surround are registered trademarks of Dolby Laboratory Licensing Corporation.
The Q Surround virtual processor (MM1454) was developed by Mitsumi Electric, and has not received the
certification or authorization of Dolby Laboratory.
Mitsumi Electric has no business ties or other relationship with Dolby Laboratory.
Logic encoded source is input.
Q Surround Processor
Monolithic IC MM1454
Operating Temperature
Power Supply Voltage
Storage Temperature
Output Voltage
Allowable loss
Input Voltage
Item
Q Surround
ON: 15µVrms
OFF: 10µVrms
(Ta=25°C)
V
V
Symbol
I
CC
O
IN
T
T
Pd
max.
STG
OPR
max.
max.
0 < = V
-40~+125
-20~+75
Rating
350
13
IN
10
< = V
CC
Q Surround Processor MM1454
Unit
mW
mA
°C
°C
V
V

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mm1454 Summary of contents

Page 1

... Pro Logic sound. * Dolby and Dolby Surround are registered trademarks of Dolby Laboratory Licensing Corporation. * The Q Surround virtual processor (MM1454) was developed by Mitsumi Electric, and has not received the certification or authorization of Dolby Laboratory. Mitsumi Electric has no business ties or other relationship with Dolby Laboratory. * Features 1 ...

Page 2

... PSRRqx SG3 : 100mVrms, 100Hz SW1 : B TP1, TP2 SG3 : 100mVrms, 100Hz SW1 : B PSRRby Vbyp=0V SG1 : 0.75Vrms, 1kHz SW2 : B Ct1 * 8 Vbyp=0V SG2 : 0.75Vrms, 1kHz SW3 : B Ct2 * 9 Vbyp=0V Q Surround Processor MM1454 Unit ° =9V, Ta=25°C, Vbyp=5V, SW1,2, Min. Typ. Max. Unit 16 TP1 8.5 9.5 TP2 4 ...

Page 3

... The mute signal for turning off the power amp power supply is output to Pin 4. On this IC recommended that the pop noise generated during power supply fall be muted by turning off the power amp connected to the final stage of MM1454 before turning off the IC power supply. * ...

Page 4

... Resistor Tolerance ± Capacitor Tolerance ± The mute signal which switches off the power supply of a power amplifier that is connected with MM1454 * appears in the 4 terminal. (NOTE 7) 4 The pop noise which occurs in a moment of the power supply switching on is reduced by connecting the * capacitor (10uF) between 2PIN and GND ...

Page 5

... 0 OUT 0.01 10 0.01 6. Input voltage (1) - Power supply voltage (QSrround) and IN 1.2 1 0.8 0.6 0.4 0 See Electrical Characteristics Note Surround Processor MM1454 ) (QSrround) IN f=1kHz, R =0Vrms OUT OUT 0 Input Voltage ( Vrms ) Power supply voltage V CC ...

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