QS7785

QS7785PF/CF NIPPON PRECISION CIRCUITS INC. 3D 2/4-Channel Stereo Surround Synthesizer OVERVIEW The QS7785PF/CF is an audio processor IC that generates 2, 4, 5-channel stereo surround signals from 2-channel stereo or mono sources using QSurround™ technology developed and licensed by QSound Labs, Inc. It can create 2-channel left and right surround effect signal for front speakers, and a rich enhanced surround signal using front speakers and surround speakers for 4-channel output. It also features a center signal output for clear listening of vocal and speech signals. FEATURES I I I I Surround signal output for 2-channel front speakers Surround signal output for 4-channel front + surround speakers Center speaker output for voice signals Parallel and 2 serial interfaces for mode control supported I I I QS7785CF: I2C bus 2-wire serial interface (Data and Clock) QS7785PF: 3-wire serial interface (Data, Clock and Strobe) 5 to 13V analog supply 4.5 to 5.5V digital supply 48-pin QFP package APPLICATIONS I I TV, radio and VCRs Car audio I Multimedia products PINOUT (Top view) QS7785PF FROUT FLOUT QXAC1 QXAC2 QXAC3 QXAC4 QXBC1 QXBC2 QXBC3 QXBC4 QS7785CF FROUT 26 QXAC1 QXAC2 QXAC3 QXAC4 QXBC1 QXBC2 QXBC3 36 35 34 33 32 31 30 29 28 27 26 25 36 35 34 33 32 31 30 29 28 27 QXBC4 BASC1 BASC1 VCC VCC RIN LIN BASC2 MSC6 MSC5 MSC4 MSC3 MSC2 MSC1 QXCC1 QXCC2 QXCC3 37 38 39 40 41 42 43 44 45 46 47 48 10 11 12 1 2 3 4 5 6 7 8 9 24 23 22 21 20 ...