TEF6890H/V2,518

Overview

The TEF6890H is a monolithic BiMOS integrated circuit designed as a car radio signal processor. It integrates stereo decoding, weak signal processing, and ignition noise blanking for AM and FM bands. The device includes an input selector, tone/volume control, and RDS/RBDS demodulation. Operating on an 8 V to 9 V supply, it features a Fast mode 400 kHz I2C-bus interface with gated loop-through capabilities. The component utilizes a 44-QFP package (10x10 mm) and supports external reference frequencies from tuner ICs without requiring an internal crystal.

Feature Summary

• Integrated stereo decoder with pilot cancellation and IF roll-off correction
• Fully integrated AM and FM noise blankers with adjustable sensitivity
• Weak signal processing using USN and WAM detectors for soft mute and high cut control
• Audio tone/volume control with ASI for smooth transitions and programmable loudness

Applications

• Car radio integrated signal processors
• Automotive audio systems requiring AM/FM reception
• RDS/RBDS data demodulation applications

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package variant and tape/reel specifications. Confirm that the 44-QFP package dimensions match the target PCB footprint requirements. Ensure the design accommodates the 8 V to 9 V supply voltage range and I2C logic level compatibility.

Selection Notes

Select this component for designs requiring a single-chip solution for AM/FM audio processing and RDS demodulation. The gated I2C-bus feature simplifies PCB layout by reducing crosstalk between the processor and tuner ICs. Consider the Audio Step Interpolation (ASI) function if minimizing audio pops during volume or source switching is critical.

Part Context

The TEF6890H belongs to the NICE (New In Car Entertainment) family of automotive audio components. It is designed to work in conjunction with NICE family tuner ICs, such as the TEA684x series, which provide the necessary reference frequency for the stereo PLL and RDS demodulator. This integration allows for reduced external component count and simplified system architecture.

Replacement Considerations

The TEF6894H is a related model within the same product family offering similar signal processing functions. Verify pinout compatibility and specific feature differences before substitution. No other direct cross-model replacements are confirmed in public documentation.