TEA6886HL

GENERAL DESCRIPTION

The TEA6886HL is a monolithic bipolar integrated circuit providing the stereo decoder function and ignition noise blanking facility combined with source selector and tone/volume control for AM/FM car radio applications. The device operates with a power supply voltage range from 7.8 to 9.2 V and a typical current consumption of 40 mA.

FEATURES

General
• I2C-bus compatible
• Digital alignment/adjustment via I2C-bus:
– FM noise blanker sensitivity
– FM stereo noise canceller
– FM High Cut Control (HCC)
– FM stereo separation.
• FM audio processing hold for RDS updating; holds the detectors for the FM weak signal processing in their present state
• FM bandwidth limiting; limits the bandwidth of the FM audio signal with external capacitors
• AM stereo input; AM stereo audio can be fed in at the pins for the de- emphasis capacitors; this will provide 8 dB of gain to the AM audio.

Stereo decoder and noise blanking

• FM stereo decoder
• Accepts FM multiplex signals and AM audio at input
• Pilot detector and pilot canceller
• De-emphasis selectable between 75 and 50 µs
• AM noise blanker: impulse noise detector and an audio hold.

Weak signal processing

• FM weak signal processing: six signal condition detectors, soft mute, stereo noise canceller (blend), and high cut control (roll-off).

Audio pre-amplifier

• Source selector for 6 sources: 2 stereo inputs external (channels A and B), 1 symmetrical stereo input (channel C), 1 symmetrical mono input (D), 1 internal stereo input (AM or FM), and 1 chime/diagnostic mono input
• Volume 1 control from +20 to −56 dB in 1 dB steps; programmable 20 dB loudness control included
• Volume 2 control from 0 to −56 dB in 1 dB steps, −56, −58.5, −62, −68 dB and mute
• Programmable loudness control with bass boost as well as bass and treble boost
• Treble control from −14 to +14 dB in 2 dB steps
• Bass control from −18 to +18 dB in 2 dB steps with selectable characteristic
• Analog Step Interpolation (ASI) minimizes pops by smoothing out the transitions in the audio signal when a switch is made
• Audio Blend Control (ABC) minimizes pops by automatically incrementing the volume and loudness controls through each step between their present settings and the new settings
• Rear Seat Audio (RSA) can select different sources for the front and rear speakers
• Chime input: can be sent to any audio output, at any volume level
• Chime adder circuit: chime input can also be summed with left front and/or right front audio, or be turned off