Compander IC - Mitsumi Electronics
Description
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MITSUMI
Compander IC MM1077
Compander IC
Monolithic IC MM1077
Outline
This IC was developed for use in cordless telephone equipment.
It is a compander IC incorporating compressor/expander circuits for a significant noise reduction effect without complicated external circuitry.
On the transmission side, the dynamic range of audio signals is compressed by the compressor circuit; on the receiving side, the expander expands the signals.
As a result the dynamic range over the transmission channel is reduced logarithmically by one-half.
Features
1.
Can be driven at low voltages (down to 2.
0V) 2.
Internal mute function 3.
Internal limiter (IDC) function 4.
Compressor input can be switched between MIC and LINE 5.
Internal standby function 6.
Data input, output pins 7.
Independent mute circuit
Package
SSOP-24A (MM1077XF)
Applications
1.
Cordless telephones 2.
Various mobile communication devices
Pin Assignment
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12 SSOP-24A 1 2 3 4 5 6 7 8 C.
Vref C.
IN1 C.
IN2 C.
INC.
RECT C.
RIN C.
FB C.
NF 9 10 11 12 13 14 15 16 DATA.
IN C.
CONT N.
C GND STANDBY SW C.
IN SW C.
MUTE SW E.
MUTE SW 17 18 19 20 21 22 23 24 E.
RECT E.
OUT E.
RIN A.
OUT A.
INA.
IN+ E.
Vref Vcc
MITSUMI
Compander IC MM1077
Block Diagram
Absolute Maximum Ratings
Item Storage temperature Operating temperature Power supply voltage Allowable loss Operating voltage
(Ta=25°C) Symbol TSTG TOPR VCC max.
Pd Ratings -40~+125 -10~+70 -0.
3~+8 650 +2.
0~+7 Units
° C ° C
V mW V
MITSUMI
Compander IC MM1077
Electrical Characteristics
Item
(Except where noted otherwise, Ta=25°C, VCC=3V, fin=1kHz) Symbol Measurement conditions ICC Iscc Vth VINc Gc1 Gc2 THDc Vnc Attc Vlimc GDATA CTc RRc VINe Ge1 Ge2 Ge3 THDe Ve max.
Vne Atte GI Veo max.
CTe RRe
IN
Min.
Typ.
Max.
Units 4.
0 0 0.
40 0.
65 13.
5 0 0 0.
3 2.
5 40 700 50 800 0 900 33 23 35 0 0 0 0.
15 600 60 14.
6 0.
90 60 50 800 20 70 15.
6 1.
10 75 60 16.
6 40 50 0.
5 1.
0 1.
5 1.
0 900 0.
5 6.
0 10 0.
80 0.
5 1.
0 1.
0 5.
0 mA µA...
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