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tea5761

1.General description

The TEA5761UK is a single-chip electronically tuned FM stereo radio for low-voltage applications with fully integrated IF selectivity and demodulation.

The radio is completely adjustment free and only requires a minimum of small and low cost external components. The radio can tune to the European, US and Japanese

FM bands. The radio does not meet all of the requirements of EN55020; a trade off has been implemented to achieve the following features.

2.Features

s High sensitivity due to integrated low noise RF input amplifier

s FM mixer for conversion of the US and Europe FM band (87.5MHz to 108MHz) and Japanese FM band (76MHz to 90MHz) to IF

s Preset tuning to receive Japanese TV audio up to 108MHz, raster 100kHz s Auto search tuning, 100kHz grid

s RF automatic gain control circuit

s LC tuner oscillator operating with one low-cost chip inductor; no need for external varicap

s Fully integrated FM IF selectivity

s Fully integrated FM demodulator; no external discriminator

s Crystal oscillator at 32768 Hz, or external reference frequency at 32768 Hz s PLL synthesizer tuning system

s IF counter; 7-bit output via the I 2C-bus

s Level detector; 4-bit level information output via the I 2C-bus

s Soft mute: signal dependent mute function

s Mono/stereo blend:gradual change from mono to stereo,depending
on signal;Stereo Noise Cancelling (SNC)

s Mono/stereo blend:gradual change from mono to stereo,depending on signal;Stereo Noise Cancelling (SNC)

s Soft mute and SNC can be switched off via the I 2C-bus

s Adjustment-free stereo decoder

s I 2C-bus interface

s Autonomous search tuning function

s Standby mode

s MPX output

s One software programmable port

s Interrupt flag TEA5761UK Low voltage single-chip FM stereo radio Rev. 01 — 2 August 2006

tea5761

Product data sheet

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