TEA6321T/V1,512

Overview

The TEA6321T/V1,512 is an I2C-bus controlled stereo preamplifier designed for car radio and hi-fi sound applications. It integrates a source selector for four stereo and one mono input, volume control with loudness compensation, bass and treble equalization, balance, and fader functions. The device operates on a supply voltage of 7.5V to 9.5V, drawing a typical supply current of 26 mA. Key electrical specifications include a maximum voltage gain of +20 dB, a signal-plus-noise to noise ratio of 105 dB, and channel separation of 96 dB. It features fast mute capabilities via I2C or hardware pin, ensuring clean audio transitions.

Feature Summary

• Integrated I2C-bus control for all functions including volume, balance, fader, and source selection.
• Automatic loudness characteristic control linked to volume settings for enhanced low-volume listening.
• Adjustable bass (±18 dB at 46 Hz) and treble (±12 dB at 15 kHz) controls with external filter interfaces.
• Three mute modes: zero-crossing detection, fast hardware mute via MUTE pin, and fast I2C general mute.

Applications

• Car radio pre-amplifiers
• Hi-fi sound system preamplifiers
• Audio source switching and mixing circuits

Procurement Notes

Verify the obsolete status of this component before design finalization. Confirm that the 32-SO package dimensions match the PCB footprint requirements. Ensure the I2C bus voltage levels are compatible with the host controller logic. Check for available replacement components from NXP or third-party manufacturers if long-term supply is required.

Selection Notes

Select this IC for applications requiring integrated audio preprocessing with digital control. The 7.5V to 9.5V supply range suits automotive environments. Consider the external components needed for bass/treble filters and loudness compensation. Verify that the 32-lead SOIC package fits the mechanical constraints of the target enclosure.

Part Context

This part belongs to the TEA6321 family of sound fader control circuits manufactured by NXP (formerly Philips Semiconductors). It is a specialized audio IC designed to replace discrete analog control circuits in automotive and home audio systems, reducing component count and board space while providing precise digital control over audio parameters.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the product status is listed as obsolete, consult NXP for recommended replacements or evaluate generic I2C-controlled audio preamplifiers with similar pinouts and electrical characteristics.