processor

TEF6890H Datasheet – Car Radio Integrated Signal Processor

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Part Number: TEF6890H

Function: Car Radio Integrated Signal Processor

Package : QFP44 type

Manufacturer: Philips Semiconductors, NXP

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TEF6890H datasheet

Description

The TEF6890H is a monolithic BiMOS integrated circuit comprising the stereo decoder function, weak signal processing and ignition noise blanking facility for AM and FM combined with input selector and tone/volume control for AM and FM car radio applications. The RDS/RBDS demodulator function is included. The device operates with a supply voltage of 8 to 9 V.

 

Features

Weak signal processing
· FM weak signal processing with detectors for RF level, Ultrasonic Noise (USN) and Wideband AM (WAM) information
· AM weak signal processing with detectors for level information
· AM processing with soft mute and High Cut Control (HCC)
· FM processing with soft mute, stereo blend and HCC
· Setting of the sensitivity of the detectors and start and slope of the control functions via I2C-bus
· Weather band de-emphasis
· Level, USN and WAM read-out via I2C-bus (signal quality detectors)
· Full support of tuner AF update functions with TEA684x tuner ICs, FM audio processing holds the detectors for the FM weak signal processing in their present state during RDS updating.

 

Pinout
TEF6890H pinout

Applications

 

TEF6890H Datasheet PDF Download


 

BD3702FV Datasheet – Sound Processor for car audio – Rohm

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Part Number: BD3702FV

Function : Sound Processor for car audio

Package: SSOP-B28 Type

Manufacturer: Rohm

Image
BD3702FV Sound Processor
Features

1. Reduce switching noise of input gain control, mute, main volume, fader volume, bass, middle, treble, loudness, mixing by using advanced switch circuit [Possible to control all steps]

2. Built-in ground isolation amplifier inputs, ideal for external stereo input.

3. Built-in differential input selector that can make various combination of single-ended / differential input.

4. Built-in input gain controller reduce switching noise for volume of a portable audio input.

5. Decrease the number of external components by built-in 3-band equalizer filter, LPF for subwoofer, loudness filter. And, possible to control Q, Gv, fo of 3-band equalizer and fc of LPF, fo, Gv of loudness by I2C BUS control freely.

6. It is possible for the bass, middle, treble to the gain adjustment quantity of ±20dB and 1 dB step gain adjustment.

7. It is equipped with output terminals of Subwoofer. Moreover, the stereo signal of the front and rear also can be output by the I2C BUS control.

8. Built-in mixing input and mixing attenuation.

 

Pinout

BD3702FV datasheet pinout

 

 

BD3702FV Datasheet


 

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