November 2007 Rev 4 1/23
23
TDA7439DS
Three-band digitally-controlled audio processor
Features
! Input multiplexer
four stereo inputs
selectable input gain for optimal adaptation
to different sources
! Single stereo output
! Treble, mid-range and bass control in 2-dB
steps
! Volume control in 1-dB steps
! Two speaker attenuators:
two independent speaker controls in 1-dB
steps for balance facility
independent mute function
! All functions are programmable via serial bus.
Description
The TDA7439DS is a volume, tone (bass,
mid-range and treble) and balance (left/right)
processor for quality audio applications in
car-radio and Hi-Fi systems. Selectable input gain
is provided. All the functions are controlled by
serial bus.
The AC signal setting is obtained by resistor
networks and switches combined with operational
amplifiers.
The TDA7439DS employs BIPOLAR/CMOS
technology to provide low distortion, low noise
and DC stepping.
SO28
Table 1. Device summary
Order codes Package Packaging
TDA7439DS SO28 Tube
TDA7439DS
13TR SO28 Tape and Reel
www.st.com
Contents TDA7439DS
2/23
Contents
1 Block diagram and pin out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Application suggestions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Tone control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.1 Bass, mid-range stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.2 Treble stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Pin CREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4I
2
C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Data validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Start and stop conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Byte format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.5 Transmission without acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.6 Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5I
2
C bus transmission examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1 No address incrementing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2 Address incrementing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6I
2
C bus addresses and data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1 Chip address byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2 Sub-address byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.3 Data bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Chip input/output circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
TDA7439DS Block diagram and pin out
3/23
1 Block diagram and pin out
Figure 1. Block diagram
Figure 2. Pin connections
0/30dB
2dB STEP
MUXOUTL
VOLUME
VOLUME
TREBLE
TREBLE
TREBLE(L)
MIDDLE
MIDDLE
MUXOUTR
TREBLE
(
R
)
BOUT(L)
SPKR ATT
LEFT
LOUT
SCL
SDA
DIG_GND
ROUT
D97AU621
I
2
CBUS DECODER + LATCHES
100K
100K
100K
100K
G
L-IN1
L-IN2
L-IN3
L-IN4
100K
100K
100K
100K
R-IN1
R-IN2
R-IN3
R-IN4
G
INPUT MULTIPLEXER
+ GAIN
MOUT(L)
BASS
BIN(L)
BASS
SPKR ATT
RIGHT
MIN
(
R
)
MOUT
(
R
)
BOUT
(
R
)
BIN
(
R
)
SUPPLY
CREF
AGND
V
S
MIN(L)
27
4
5
6
7
3
2
1
28
21
22
20
26
24
25
9 191011121323
8 1817161415
R
M
R
B
R
M
R
B
V
REF
L_IN3
L_IN4
MUXOUTL
MUXOUTR
MIN(R)
BIN(R)
MOUT(R)
BOUT(R)
BIN(L)
1
3
2
4
5
6
7
8
9
BOUT(L)
MOUT(L)
MIN(L)
TREBLE(R)
TREBLE(L)
SCL
SDA
DIG-GND
CREF23
22
21
20
19
17
18
16
15
D97AU622
10
11
12
13
14
28
27
26
25
24
R_IN3
R_IN2
R_IN1
L_IN1
L_IN2 V
S
AGND
ROUT
LOUT
R_IN4

TDA7439DS13TR

Mfr. #:
Manufacturer:
STMicroelectronics
Description:
Audio DSPs 3-Band Digital Cont
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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