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DESCRIPTION

The TDA7420 I2C bus controlled multifunction audio processor contains all signal processing blocks of a high performance car radio, including audioprocessor, stereodecoder, noise blanker, different mute functions, cassette preamplifier and AMS function.

CASSETTE PREAMPLIFIER:

■ FORWARD/REVERSE INPUTS GROUND COMPATIBLE

■ INTERNAL SWITCHES FOR EQUALIZATION

■ INTERNAL ADJUSTMENT FOR TRAKING

■ INTERNAL ADJUSTMENT FOR OUTPUT

AMS:

■ INPUT GAIN CONTROL

■ ADJUSTABLE GAIN VERSUS FREQUENCY

AUDIOPROCESSOR:

■ INPUTS: 1 FULLY DIFFERENTIAL, 1 DIFFERENTIAL, 1 STEREO AND 1 MONO

■ INPUT GAIN FROM 0 TO 15dB (1dB STEP)

■ VOLUME CONTROL FROM +16 TO -63dB (1dB STEP)

■ BASS AND TREBLE CONTROL FROM -18 TO 18dB (1dB STEP)

■ DIRECT MUTE, SOFT MUTE AND RADIO MUTE

■ FOUR INDEPENDENT OUTPUT STAGES:

- ATTENUATION CONTROL FROM 0 TO -79dB (1dB STEP)

- BEEP CONTROL (ON/OFF, FRONT/REAR)

STEREO DECODER:

■ ROLL-OFF ADJUSTMENT

■ SELECTABLE DEEMPHASIS

■ 19KHz CANCELLATION

■ HIGH CUT CONTROL

■ STEREO BLEND

NOISE BLANKER

■ AUTOMATIC THRESHOLD CONTROL AND PROGRAMMABLE TRIGGER THRESHOLD

■ INTEGRATED HIGH PASS FILTER

■ PACKAGE: TQFP64 (14x14)