TDA7434 Datasheet, PDF (1/10 Pages) STMicroelectronics – BASIC FUNCTION AUDIO PROCESSOR

TDA7434
BASIC FUNCTION AUDIO PROCESSOR
TWO STEREO AND ONE MONO INPUTS
MUTE FUNCTION (SOFTWARE AND HARD-
WARE) CONTROLLED
VOLUME CONTROL IN 1dB STEP
BASS AND TREBLE CONTROL
FOUR SPEAKER ATTENUATORS:
– Independentattenuation control
– Independentmute function
ALL FUNCTIONS PROGRAMMABLE VIA
I²CBUS
FULLY PROGRAMMABLE LOUDNESS CON-
TROL
SDIP24
ORDERING NUMBER: TDA7434
DESCRIPTION
The TDA7434 is a volume, tone (bass and treble)
balance (Left / Right) fader (Front / Rear) proces-
sor for quality audio applications in car radio and
Hi-Fi systems.
Control is accomplished by serial bus microproc-
essor interface.
BLOCK DIAGRAM
The AC signal setting is obtained by resistor net-
works and switches combined with operational
amplifiers.
Thanks to the advanced BIPOLAR/CMOS Tech-
nology, the external components have been re-
duced.
6
IN1_L
2
IN2_L
4
MONO/MUTE
4.7K
100nF
100nF
2.7nF
LOUD_L
7
BIN_L
12
BOUT_L TRL
11
13
SPKR
ATT
19
LEFT FRONT
MUX
VOL
BASS
TREBLE
SPKR 17
ATT
LEFT REAR
S BUS DECODER + LATCHES
21
SCL
22
SDA
1
IN2_R
5
IN1_R
20
VS
MUX
SUPPLY
23
GND
24
CREF
VOL
BASS
TREBLE
SPKR
ATT
18
RIGHT FRONT
SPKR
ATT
16
RIGHT REAR
8
10
9
14
LOUD_R BIN_R BOUT_R TRR
100nF
100nF
2.7nF
4.7K
D95AU360A
August 1996
1/10
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.