GENERAL DESCRIPTION
The TEA6821T together with the TEA6810T / TEA6811T forms an AM/FM electronic tuned car radio in a double
conversion receiver concept for European, American and Japanese frequency range.

FEATURES
General
• FM mixer for conversion from FM IF1= 72.2 MHz to FM IF2= 10.7 MHz
• AM mixer for conversion from AM IF1= 10.7 MHz to AM IF2= 450 kHz
• FM IF gain stage
• Crystal oscillator providing mixer frequencies and references for IF count and stereo decoder
• FM quadrature demodulator with automatic centre frequency adjust and THD compensation
• Level and multipath and noise detectors
• Soft mute
• Stereo noise cancelling and variable de-emphasis
• PLL stereo decoder
• Noise blanker
• AM IF amplifier and demodulator
• I2C-bus transceiver
• IF count for AM and FM
• Reference frequency generation for PLL synthesizer
• Reduced external components
• SW applicable.
Stereo decoder
• Adjustment-free PLL-VCO
• Pilot depending mono/stereo switching
• Analog control of mono/stereo blend
• Adjacent channel noise suppression (114 kHz)
• Pilot canceller
• Analog control of de-emphasis
• Integrated low-pass filters for 190 kHz adjacent channel interferences and signal delay for interference
absorption circuit.