BUS-CONTROLLED AUDIO MATRIX SWITCH
GND
CAPACITANCE
L1
L2
L3
L4
L5
LOUT1
ROUT1
LOUT2
ROUT2
SDA
SCL
ADDR
R1
R2
R3
R4
R5
ROUT4
LOUT4
ROUT3
LOUT3
V
S
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
24
23
22
21
11
12
25
13
14
28
27
26
NC
NC
NC
NC
■ 5 Stereo Inputs
■ 4 Stereo Ouputs
■ Gain Control 0/2/4/6dB/Mute for each Output
■ cascadable (2 different addresses)
■ Serial Bus Controlled
■ Very low Noise
■ Very low Distorsion
DESCRIPTION
The TEA6420 switches 5 s tereo audio inputs on
4stereo outputs.
All the switching possibilities are changed through
2
the I
C bus.
TEA6420
SHRINK DIP 24
(Plastic Package)
ORDER CODE: TEA6420
SO28
(Plastic Micropackage)
ORDER CODE: TEA6420D
Figure 1. PIN CONNECTIONS
S
L1
L2
L3
L4
L5
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
SDA
SCL
ADDR
R1
R2
R3
R4
R5
ROUT4
LOUT4
ROUT3
LOUT3
GND
CAPACITANCE
V
February 2006 1/7
LOUT1
ROUT1
LOUT2
ROUT2
6420-01.eps - 6420-02.eps
1
TEA6420
Figure 2. BLOCK DIAGRAM
RIGHT INPUTS
V
GND
T
E
GAIN = 0/2/4/6dB
A
6
4
2
RIGHT
OUTPUTS
0
S
C
SUPPLY
BUS DECODER
SDA
SCL
ADDR
LEFT
OUTPUTS
LEFT INPUTS
GAIN = 0/2/4/6dB
6420-03.eps
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1
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
T
OPER
T
CC
stg
Supply Voltage (Pin 9) 12 V
Operating Ambient Temperature Range 0 to +70
Storage Temperature Range -20 to +150
THERMA L D ATA
Symbol Parameter+ Value Unit
R
(j-a)
th
Junction-Ambient Thermal Resistance SDIP24
SO28
75
75
o
ELECTRICAL CHARACTERISTICS
TA = 25oC, VS = 10V, RL = 10kΩ, RG = 600Ω, f = 1kHz (unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
SUPPLY
V
S
I
S
Supply Voltage
Supply Current
SVR Ripple Rejection V
MATRIX
V
IN
R
I
C
S
Input DC Level
Input Resistance
Channel Separation VIN = 2V
OUTPUT BUFFER
V
R
OUT
OUT
e
NI
Output DC Level
Output Resistance
Input Noise BW = 20 - 20kHz, flat 3 µV
S/N Signal to Noise Ratio V
G
min
G
max
Min. Gain
Max. Gain
d Distortion V
V
CL
R
L
Clipping Level d = 0.3% 2 2.5 V
Output Load Resistance
BUS INPUT
V
IL
V
IN
I
I
V
O
R
pu
Input Low Voltage
Input High Voltage
Input Current
Output Voltage IO = 3mA ; SDA Acknowledge pin 0.4 V
ADDR Pullup Resistor Note 40 50 k
= 500mV
IN
RMS
, BW = 20 - 20kHz 70 80 dB
RMS
Gain = 0dB
f = 1kHz Gain = 6dB
IN
IN
= V
= V
OUT
OUT
= 1V
= 1V
RMS
RMS
8 9 10.2 V
58mA
4.5 5 5.5 V
30 50 100 k
80
70
90
82
4.5 5 5.5 V
70 200 W
110 dB
-1 0 + 1 dB
567dB
0.01 0.05 %
2k
1.5 V
3V
- 10 10 µA
TEA6420
o
C
o
C
C/W
Ω
dB
dB
RMS
Ω
Ω
3/7
1
TEA6420
SOFTWARE SPECIFICATION
1. Chip address
Address HEX ADDR
1001 1000 98 0
1001 1010 9A 1
2. Data bytes
Output select
X0
0
1
1
0
1
0
1
G
1
G
0
I
2
I
1
I
0
Output 1
Output 2
Output 3
Output 4
Input select
XQ
1
Q0 G
1
G
0
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
Input 1
Input 2
Input 3
Input 4
Input 5
Mute
Gain select
XQ
1
Q0 0
0
0
1
1
1
0
1
I
2
I
1
I
0
Gain = 6 dB
Gain = 4 dB
Gain = 2 dB
Gain = 0 dB
X = don’t care - MSB is transmitted first
Example : X1001100
connects output 3 with input 5 at a gain of 4dB
The following are selected after power-on reset : input 5 selected for all outputs ; gain = 0dB.
4/7
1
TYPICAL APPLICATION
1
2
3
4
5
6
7
8
9
10
11
12 13
14
15
16
17
18
19
20
21
22
23
24
µ
22 F
100nF
C
1
C
2
C
3
C
4
C
5
C
11
C
12
C
13
C
14
CH2
Output
L
R
L
R
CH1
Output
Left
Inputs
C
15
C
16
C
C
17
18
C
10
C
C
9
8
C
C
7
6
SW
R
L
CH3
Output
R
L
CH4
Output
Right
Inputs
Bus
Inputs
SCL
SDA
T
E
A
6
4
2
0
+9V
Figure 3.
TEA6420
6420-08.04
5/7
1
TEA6420
PACKAGE MECHANICAL DATA
24 PINS - PLASTIC DIP
Figure 4. 24-Pin Package
B
E
E1
A2
A1
LA
eB1
D
Stand-off
c
e1
e2
E
24
1
28 PINS - PLAS TIC SO
Figure 5. 28-Pin Package
13
F
12
SDIP24
e3
e2
.015
0,38
Gage Plane
6/7
1
TEA6420
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of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implic ation or o th erwise un der any pat ent or patent right s of STMi croelectr oni cs. Specifications menti oned in th i s publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as c ritical components in li fe support devices or syst em s without the expre ss wri t ten approval of STMic roelectronics.
The ST logo is a registered trademark of STMicroelectronics
2006 STMicroelectronics - All Rights Reserved.
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2
C Components by STMicroelectronics conveys a license under the Philips I2C Patent. Rights to use these components in an
2
I
C system i s granted pro vi ded that th e sy stem conforms to the I2C Standard Specification as defined by Philips.
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STMicroelectronics Grou p of Compan i es
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