DESCRIPTION
Selectable input gain is provided. Control of all the functions is accomplished by serial bus. BLOCK DIAGRAM (TDA7439) MUXOUTL L-IN1 11 100K 12 100K 13 100K 14 100K 0/30dB 2dB STEP 100K 9 100K 8 G VOLUME TREBLE 15 INL 16 TREBLE(L) 27 SDIP30 DIP28 SO28 ORDERING NUMBERS: TDA7439 (SDIP30) TDA7439B (DIP28) TDA7439D (SO28) The AC signal setting is obtained by resistor networks and switches combined with operational amplifiers. Thanks to the used BIPOLAR/CMOS Technology, Low Distortion, Low Noise and DC stepping are obtained MIN(L) MOUT(L) BIN(L) 26 RM 25 23 RB BOUT(L) 24 L-IN2 L-IN3 MIDDLE BASS SPKR ATT LEFT 6 LOUT L-IN4 30 I2CBUS DECODER + LATCHES 1 29 SCL SDA DIG_GND R-IN1 10 R-IN2 G VOLUME TREBLE MIDDLE BASS SPKR ATT RIGHT V REF 5 ROUT R-IN3 100K 7 100K INPUT MULTIPLEXER + GAIN 17 MUXOUTR 18 INR 28 TREBLE(R) 19 RM 20 21 RB 22 2 D95AU342B 3 SUPPLY 4 R-IN4 VS AGND MIN(R) MOUT(R) BIN(R) BOUT(R) CREF April 1999 1/19 TDA7439 BLOCK DIAGRAM (TDA7439B/TDA7439D) MUXOUTL L-IN1 4 100K 5...
STMicroelectronics
