TDA8421 Просмотр технического описания (PDF) - Philips Electronics
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TDA8421 Datasheet PDF : 26 Pages
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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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