TEA6420
BUS-CONTROLLED AUDIO MATRIX
May 1996
6420-01.EPS
/
6420-02.EPS
PIN CONNECTIONS
SHRINK24
(Plastic Package)
ORDER CODE : TEA6420
.
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 stereo audio inputs on
4 stereo outputs.
All the switching possibilities are changed through
the I
2
C bus.
SO28
(Plastic Micropackage)
ORDER CODE : TEA6420D
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
24
23
22
21
11
12
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
SHRINK24
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
SO28
1/6
S UPP LY
BUS DECODER
RIGHT
OUTP UTS
LEF T
OUTP UTS
S DA
S CL
ADDR
RIGHT INPUTS
GAIN = 0/2 /4 /6 dB
GAIN = 0/2 /4 /6 dB
V
S
C
GND
LEF T INPUTS
T
E
A
6
4
2
0
6420-03.EPS
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
10.2
V
T
oper
Operating Ambient Temperature
0, + 70
o
C
T
stg
Storage Temperature
- 20, + 150
o
C
6420-01.TBL
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th(j-a)
Junction Ambient Thermal Resistance
SHRINK24
SO28
75
75
o
C/W
6420-02.TBL
ELECTRICAL CHARACTERISTICS
T
A
= 25
o
C, V
S
= 10V, R
L
= 10k
, R
G
= 600
, f = 1kHz (unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
SUPPLY
V
S
Supply Voltage
8
9
10.2
V
I
S
Supply Current
5
8
mA
SVR
Ripple Rejection
V
IN
= 500mV
RMS
, BW = 20 - 20kHz
70
80
dB
MATRIX
V
IN
Input DC Level
4.5
5
5.5
V
R
I
Input Resistance
30
50
100
k
C
S
Channel Separation
V
IN
= 2V
RMS
Gain = 0dB
f = 1kHz
Gain = 6dB
80
70
90
82
dB
dB
6420-03.TBL
TEA6420
2/6
ELECTRICAL CHARACTERISTICS (continued)
T
A
= 25
o
C, V
S
= 10V, R
L
= 10k
, R
G
= 600
, f = 1kHz (unless otherwise specified)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
OUTPUT BUFFER
V
OUT
Output DC Level
4.5
5
5.5
V
R
OUT
Output Resistance
70
200
e
NI
Input Noise
BW = 20 - 20kHz, flat
3
V
S/N
Signal to Noise Ratio
V
IN
= V
OUT
= 1V
RMS
110
dB
G
min
Min. Gain
-1
0
+ 1
dB
G
max
Max. Gain
5
6
7
dB
d
Distortion
V
IN
= V
OUT
= 1V
RMS
0.01
0.05
%
V
CL
Clipping Level
d = 0.3%
2
2.5
V
RMS
R
L
Output Load Resistance
2
k
BUS INPUT
V
IL
Input Low Voltage
1.5
V
V
IN
Input High Voltage
3
V
I
I
Input Current
- 10
10
A
V
O
Output Voltage
I
O
= 3mA ; SDA Acknowledge pin
0.4
V
R
pu
ADDR Pullup Resistor
Note
40
50
k
Note : Rpu is an internal pull-up resistor connected between the address programming pin ADDR and the internal positive supply voltage.
Leaving ADDR disconnected or "floating" allows it to become logic 1. Connecting ADDR externally to the GND pin forces it to logic 0.
6420-04.TBL
SOFTWARE SPECIFICATION
1. Chip address
Address
HEX
ADDR
1001 1000
98
0
1001 1010
9A
1
6420-05.TBL
2. Data bytes
Output select
X
0
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
X
Q
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
X
Q
1
Q0
0
0
1
1
0
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 : 0 10 01 100 connects outputs 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.
6420-06.TBL
TEA6420
3/6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
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
6420-04.EPS
C1 - C18 = 4.7
F
TYPICAL APPLICATION (DIP package)
TEA6420
4/6
Stand-off
A1
B
e
B1
D
13
12
24
1
F
LA
e1
A2
c
E1
E
e2
Gage Plane
.015
0,38
e2
e3
E
SDIP24
PMSDIP24.EPS
PACKAGE MECHANICAL DATA
24 PINS - PLASTIC SHRINK
Dimensions
Millimeters
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
A
5.08
0.20
A1
0.51
0.020
3.05
3.30
4.57
0.120
0.130
0.180
B
0.36
0.46
0.56
0.0142
0.0181
0.0220
B1
0.76
1.02
1.14
0.030
0.040
0.045
C
0.23
0.25
0.38
0.0090
0.0098
0.0150
D
22.61
22.86
23.11
0.890
0.90
0.910
E
7.62
8.64
0.30
0.340
E1
6.10
6.40
6.86
0.240
0.252
0270
e
1.778
0.070
e1
7.62
0.30
e2
10.92
0.430
e3
1.52
0.060
L
2.54
3.30
3.81
0.10
0.130
0.150
SDIP24.TBL
TEA6420
5/6
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility
for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.
1996 SGS-THOMSON Microelectronics - All Rights Reserved
Purchase of I
2
C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips
I
2
C Patent. Rights to use these components in a I
2
C system, is granted provided that the system conforms to
the I
2
C Standard Specifications as defined by Philips.
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco
The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
PM-SO28.EPS
PACKAGE MECHANICAL DATA
28 PINS - PLASTIC MICROPACKAGE
Dimensions
Millimeters
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
A
2.65
0.104
a1
0.1
0.3
0.004
0.012
b
0.35
0.49
0.014
0.019
b1
0.23
0.32
0.009
0.013
C
0.5
0.020
c1
45
o
(Typ.)
D
17.7
18.1
0.697
0.713
E
10
10.65
0.394
0.419
e
1.27
0.050
e3
16.51
0.65
F
7.4
7.6
0.291
0.299
L
0.4
1.27
0.016
0.050
S
8
o
(Max.)
SO28.TBL
TEA6420
6/6
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