TEA6320T/V1,518

Overview

The TEA6320T is an I2C-bus controlled stereo preamplifier designed for car radio and hi-fi sound applications. It integrates a source selector, volume control, balance, fader, bass/treble equalization, and loudness compensation. The device operates on a 7.5 V to 9.5 V supply with a typical current of 26 mA. Key electrical parameters include a maximum voltage gain of +20 dB, a signal-to-noise ratio of 105 dB, and channel separation of 96 dB. It features fast mute via I2C or hardware pin, zero-crossing detection, and internal power-on reset.

Applications

• Car radio audio systems
• Hi-fi sound preamplifiers
• Audio processing units requiring I2C control

Procurement Notes

Verify the package type against the specific ordering suffix. The TEA6320T denotes the SO32 plastic small outline package. Confirm the datasheet version, as this is a preliminary specification from 1995 that supersedes earlier data. Ensure compatibility with the target I2C bus voltage levels and supply voltage range of 7.5 V to 9.5 V.

Selection Notes

Select the TEA6320T when a fully integrated stereo preamp with I2C control is required for automotive or fixed audio installations. It supports external equalizer interfacing via Bass/Treble pins. Designers must provide external capacitors for bass, treble, and mute timing functions. The device requires a VCC buffer capacitor to manage power-on/reset behavior and prevent output pops during supply drop.

Part Context

The TEA6320 is part of NXP's (formerly Philips Semiconductors) line of sound fader control circuits. It is functionally similar to the TEA6321, TEA6322, and TEA6323 series, which offer comparable audio processing capabilities in different packages or with slight feature variations. These components are legacy parts designed for analog audio signal conditioning before digital audio processing became prevalent.

Replacement Considerations

Direct replacements may be limited due to the age of the component. Consider the TEA6321T or TEA6322T if pinout and functionality match the specific application requirements. Verify that any substitute maintains the 7.5-9.5 V supply range and I2C interface compatibility.