
Tel :  886-2-29162151 
Fax:  886-2-29174598 
URL: 
http://www.princeton.com.tw
4-Channel Audio Processor
PT2313L
Princeton Technology Corp. 
Description 
PT2313L 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 I
2
C  Bus. PT2313L is housed in  20-pin or 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 
CMOS Technology 
Least External Components 
Treble and Bass Control (available only in the 28-pin version)  
Loudness Function (available only in the 28-pin version) 
3 Stereo Inputs with Selectable Input Gain 
Input/Output for External Noise Reduction System/Equalizer 
4 Independent Speaker Controls for Fader and Balance 
Independent Mute Function 
Volume Control in 1.25 dB/step 
Low Distortion 
Low Noise and DC Stepping 
Controlled by I
2
C  Bus Micro-Processor Interface 
Pin-to-Pin Compatible with TDA7313 (for 28-pin version) 
Applications 
Car Stereo (Audio) 
Hi-Fi Audio System 
LCD Monitor 
Note: Purchase of I
2
C Component of Princeton Technology Corporation (PTC) conveys a license under Philips I
2
C Patent  Right to use  
          these components in any I
C System, provided that the system conforms to the I
C Standard Specification defined by Philips 
PT2323L v1.7 
Page 1 
Updated June 2001