MM1077

www.DataSheet4U.com 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 ° ...