DESCRIPTION ET2313 is a four-channel digital control audio processor utilizing CMOS Technology. Volume, Bass, Balance, Front/Rear Fader Processor, Selectable Input Gain are incorporated into a single chip having the highest performance and reliability with the least external components. All functions are programmable using the I2 C Bus. ET2313 is housed in 28-pin DIP/SOP Package. The 28-pin version provides additional Two Band Tone Control and Loudness Function and is pin-to-pin compatible with TDA7313. Pin assignments and application circuits are optimized for easy PCB layout and cost saving advantages. FEATURES z CMOS Technology z Least External Components z Treble and Bass Control z 3 Stereo Inputs with Selectable Input Gain z Input/Output for External Noise Reduction System/Equalizer z 4 Independent Speaker Controls for Fader and Balance z Independent Mute Function z Volume Control in 1.25 dB/step z Low Distortion z Low Noise and DC Stepping z Controlled by I2 C Bus Micro-Processor Interface z Pin-to-Pin Compatible with TDA7313 z Package：SOP28(ET2313), DIP28(ET2313P) PIN CONFIGURATION 1 28 14 15 REF VDD AGND TREB_L TREB_R RIN ROUT LOUD_R RIN3 RIN1 RIN2 LOUD_L LIN2 LIN1 LIN3 LIN LOUT BIN_L BOUT_L BIN_R BOUT_R RROUT LROUT RFOUT LFOUT DGND DATA CLK 2 3 4 5 6 7 8 9 10 11 12 13 16 17 18 19 20 21 22 23 24 25 26 27 APPLICATIONS z Car Stereo (Audio) z Hi-Fi Audio System