TEA6324T/V1,518

Overview

The TEA6324T is an I2C-bus controlled stereo preamplifier designed for car radio and hi-fi sound applications. It integrates a source selector for two stereo and one mono input, volume control with a total range of up to 106 dB, and independent bass (±18 dB) and treble (±12 dB) controls. The device features fast mute via I2C or hardware pin, zero-crossing mute detection, and interfaces for external noise reduction or equalizers. Operating on a 7.5 V to 9.5 V supply, it delivers a typical signal-to-noise ratio of 105 dB and includes internal power-on reset functionality.

Applications

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

Procurement Notes

Verify the package variant matches the specific order code suffix. The TEA6324T/V1,518 indicates a Tape & Reel (TR) packaging format, whereas standard datasheet references often cite the SO24 tube version. Confirm the supplier device package is 24-SO and that the operating temperature range meets the application requirement of -40°C to 85°C.

Selection Notes

Select this component for applications requiring integrated tone control and source switching in a single IC. Ensure the power supply voltage remains within the 7.5 V to 9.5 V limit. For optimal performance, use external capacitors as specified in the datasheet for bass/treble filters and mute timing. The device supports 5V logic levels on the I2C bus inputs.

Part Context

The TEA6324T belongs to NXP's (formerly Philips Semiconductors) line of sound control circuits. It is functionally similar to the TEA6321T but differs in package options and specific pin configurations. It serves as a dedicated solution for automotive audio front-ends where space and integration are critical.

Replacement Considerations

Check for direct replacements within the TEA632x family, such as the TEA6321T, ensuring pin compatibility and electrical parameter alignment. Verify if any ordering suffix changes affect the package type or temperature grade without altering the core functionality.

FAQ

How does the mute function operate?

The TEA6324T supports three mute modes: zero-crossing mute via I2C (delayed until audio signal crosses zero), fast mute via I2C (immediate), and hardware mute via the MUTE pin (immediate when grounded). Hardware mute overrides I2C commands.

What is the maximum voltage gain?

The maximum voltage gain is +20 dB, achieved by the Volume I control block. The total recommended control range is 86 dB (+20 dB to -66 dB).

Can the bass and treble controls be bypassed?

Yes, the bass and treble control functions can be switched off via the I2C bus. In this state, the internal signal flow is disconnected, and pins B2L/B2R and TL/TR serve as outputs/inputs for an external equalizer.