TDA7437 Datasheet | STMicroelectronics

® DIGITALLY CONTROLLED AUDIO PROCESSOR INPUT MULTIPLEXER - FOUR STEREO, ONE MONO INPUT, AND ONE DIFFERENTIAL INPUT - SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTATION TO DIFFERENT SOURCES FULLY PROGRAMMABLE LOUDNESS FUNCTION VOLUME CONTROL IN 1d B STEPS INCLUDING GAIN UP TO 16d B ZERO CROSSING MUTE, SOFT MUTE AND DIRECT MUTE BASS AND TREBLE CONTROL FOUR SPEAKER ATTENUATORS - FOUR INDEPENDENT SPEAKERS CONTROL IN 1d B STEPS FOR BALANCE AND FADER FACILITIES PAUSE DETECTOR PROGRAMMABLE THRESHOLD ALL FUNCTIONS PROGRAMMABLE VIA SERIAL I2 CBUS DESCRIPTION The audioprocessor TDA7437 is an upgrade of the TDA731X audioprocessor family. PIN CONNECTION PQFP44 and TQFP44 ORDERING NUMBERS: TDA7437 (PQFP44) TDA7437T (TQFP44) Due to a highly linear signal processing, using CMOS-switching techniques instead of standard bipolar multipliers, very low distortion and very low noise are obtained. Several new Features like softmute, and zero-crossing mute are implemented. The soft Mute function can be activated in two ways: 1 Via serial bus (Mute byte, bit D0) 2 Directly on pin 28 through an I/O line of the microcontroller Very low DC stepping is obtained by use of a BICMOS technology. 44 43 42 41 40 39 38 37 36 35 34 TREB_R IN_R MUXOUT_R LOUD_R DIFFGND_R DIFF_R STEREO4_R STEREO1_R STEREO2_R STEREO3_R MONO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 DIFFGND_L STEREO4_L STEREO1_L STEREO2_L STEREO3_L MUXOUT_L LOUD_L DIFF_L MID_LI CSM IN_L 33 32 31 30 29 28 27 26 25 24 23 OUT_RF OUT_LR MID_RI MID_RO OUT_RR SMEXT BASS_RO BASS_RI BASS_LO BASS_LI MID_LO OUT_LF D96AU435A TREB-L PAUSE DGND AGND DVDD ADDR AVDD CREF December...