TDA8421 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TDA8421

Hi-fi stereo audio processor; I²C-bus

Philips Electronics 

Philips Semiconductors

Hi-fi stereo audio processor; I2C bus

Product specification

TDA8421

Truth tables

Table 4 Mode selectors

Truth tables for the switch functions

CH1

CH2

Table 3 Input selector

mode

ML0 ML1 MH0 MH1

function

IN1

IN2

IS

stereo

1

1

1

1

0

sound A

1

0

1

0

1

sound B

0

1

0

1

----------

0

0

0

0

Table 5 Stereo/pseudo stereo/spatial stereo

spatial

stereo

pseudo

-----------

choise

STL

1

1

0

0

EFL

1

0

1

0

Table 6 Mute

mute

MU

active; automatic

after POR(1)

1

not active

0

Notes

1. Attenuation ≥ 90 dB; POR = Power-On Reset.

Table 7 Output for external switch

ground

open collector

EXSN

EXS

1

0

Truth tables for the volume base and treble controls.

Table 8 Volume control

CH1

16

14

⋅

⋅

⋅

−46

−48

⋅

−62

≤−90

⋅

⋅

⋅

≤−90

CH2

0

−2

⋅

⋅

⋅

−62

≤−90

⋅

≤−90

≤−90

⋅

⋅

⋅

≤−90

V×5

1

⋅

⋅

⋅

⋅

1

0

⋅

0

0

⋅

⋅

⋅

0

V×4

1

⋅

⋅

⋅

⋅

0

1

⋅

1

1

⋅

⋅

⋅

0

V×3

1

⋅

⋅

⋅

⋅

0

1

⋅

1

0

⋅

⋅

⋅

0

Note

1. The values of CH1 and CH2 are in 2 dB/step measured in dBs.

May 1988

7

V×2

1

⋅

⋅

⋅

⋅

0

1

⋅

0

1

⋅

⋅

⋅

0

V×1

1

⋅

⋅

⋅

⋅

0

1

⋅

0

1

⋅

⋅

⋅

0

V×0

1

⋅

⋅

⋅

⋅

0

1

⋅

0

1

⋅

⋅

⋅

0

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