TEA6880H/V2,557

Overview

The TEA6880H is a monolithic bipolar integrated circuit serving as an up-level car radio Analog Signal Processor (CASP). It integrates stereo decoding, ignition noise blanking, source selection, and tone/volume control for AM/FM applications. The device operates within a supply voltage range of 7.8 V to 9.2 V with a typical current consumption of 40 mA. Key electrical parameters include a signal-to-noise ratio of 78 dB, total harmonic distortion of 0.1%, and channel separation of 40 dB. Volume control ranges from +20 dB to -56 dB in 1 dB steps, while bass and treble adjustments span ±18 dB and ±14 dB respectively.

Feature Summary

• I2C-bus compatible digital alignment for FM noise blanker sensitivity, stereo noise cancellation, High Cut Control, and stereo separation.
• Integrated FM stereo decoder with pilot detector/canceller and selectable de-emphasis (50/75 μs).
• Six-source selector including external stereo inputs, symmetrical inputs, internal AM/FM, and chime/diagnostic mono input.
• Weak signal processing featuring soft mute, stereo noise canceller, and high cut control driven by six signal condition detectors.

Applications

• Up-level car radio analog signal processing
• AM/FM tuner audio pre-amplification and tone control
• Automotive audio systems requiring I2C-controlled DSP functions

Procurement Notes

Verify component authenticity through authorized NXP distributors or certified suppliers. Confirm the package type is QFP64 (SOT319-2) and check for automotive grade qualification if required for specific vehicle integration standards. Ensure compatibility with existing I2C bus protocols in the host system design.

Selection Notes

Select this component for applications requiring integrated stereo decoding and noise blanking alongside volume/tone control. Ensure the power supply provides a stable 7.8 V to 9.2 V range. Verify that the host microcontroller supports the I2C protocol for configuring features like soft mute thresholds and loudness curves. Consider external capacitor requirements for time constants and de-emphasis networks.

Part Context

The TEA6880H is part of the Philips/NXP Semiconductors family of analog signal processors designed specifically for automotive audio. It supersedes earlier data specifications from May 2000. The device is manufactured using bipolar technology and is housed in a 64-lead plastic quad flat package (QFP). It is often paired with FM demodulators such as the TEA6840H for complete tuner solutions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult NXP Semiconductors directly for legacy replacement options or updated product line recommendations.

FAQ

How is the stereo noise canceller controlled?

The stereo noise canceller (SNC) is controlled via the I2C-bus, which sets the starting point and slope of the stereo blend based on signals from the ultrasonic noise and AM wideband detectors.

What is the function of the FM audio processing hold?

The FM audio processing hold feature pauses the weak signal processing detectors during RDS updates to prevent audio artifacts, maintaining the current state of the detectors until the update is complete.

Can the TEA6880H handle AM stereo signals?

Yes, the device accepts AM stereo audio at the de-emphasis pins, providing 8 dB of gain to the AM audio path, and includes an AM noise blanker with impulse noise detection.