TEF6894H/V2,518

Overview

The TEF6894H is a monolithic BiMOS integrated circuit designed as an audio tone processor for car radio applications. It integrates stereo decoding, weak signal processing, and ignition noise blanking for AM and FM bands. The device operates on an 8 V to 9 V supply voltage with a typical normal mode current of 24 mA. It features a Fast Mode (400 kHz) I²C-bus interface compatible with logic levels from 2.5 V to 5 V. The component provides input selection for four sources, volume control ranging from +20 dB to -79 dB, and programmable tone controls. It is housed in a 44-lead QFP package.

Applications

• Car radio integrated signal processors
• AM/FM tuner audio post-processing
• Automotive infotainment systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm packaging details such as Tape & Reel configuration. Ensure the design supports the required 8 V to 9 V supply voltage range and utilizes a 44-QFP footprint. Confirm that the I²C bus logic levels align with the system microcontroller requirements.

Selection Notes

Select this component for applications requiring high integration of AM/FM audio processing without external components. The device supports weather band reception and offers extensive I²C configurability for noise blanking and weak signal handling. Consider the 44-PQFP package dimensions (10x10 mm) for PCB space constraints.

Part Context

The TEF6894H belongs to the Philips Semiconductors (now NXP) family of car radio integrated circuits. It is functionally related to other signal processors like the TEF6862 but focuses specifically on the audio processing, tone control, and noise blanking stages rather than the RF tuning front-end.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing tuner ICs, such as the TEA684x series, which provide the necessary reference frequency and I²C communication for the stereo PLL and gated bus functions.