TDA7342N 查看數據表（PDF） - STMicroelectronics

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TDA7342N

Digitally controlled audio processor

STMicroelectronics 

TDA7342

Digitally controlled audio processor

Features

■ Input multiplexer

– Two stereo and one mono inputs

– One quasi differential input

– Selectable input gain for optimal adaptation

to different sources

■ Fully programmable loudness function

■ Volume control in 0.3dB steps including gain

up to 20dB

■ Zero crossing mute, soft mute and direct mute

■ Bass and treble control

■ Four speaker attenuators

– Four independent speakers control in

1.25dB steps for balance and fader facilities

– Independent mute function

■ All functions programmable via serial I2C bus

Description

The audioprocessor TDA7342 is an upgrade of

the TDA731X audioprocessor family.

LQFP32

Due to a highly linear signal processing, using

CMOS-switching techniques instead of standard

bipolar multipliers, very low distortion and very

low noise are obtained. Several new features like

softmute, and zero-crossing mute are

implemented. The soft Mute function can be

activated in two ways:

1. Via serial bus (Mute byte, bit D0)

2. Directly on pin 21 through an I/O line of the

microcontroller

Very low DC stepping is obtained by use of a

BICMOS technology.

Order codes

Part number

TDA7342N

TDA7342NTR

Package

LQFP32

LQFP32

Packing

Tube

Tape and reel

November 2006

Rev 2

1/20

www.st.com

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