Sony CXA2134Q Datasheet
US Audio Multiplexing Decoder
Description
The CXA2134Q is an IC designed as a decoder for
the Zenith TV Multi-channel System and also
corresponds with I2C bus. Functions include stereo
demodulation, SAP (Separate Audio Program)
demodulation, dbx noise reduction and sound
processor. Various kinds of filters are built in this IC.
Adjustment, mode control and sound processor
control are all executed through I2C bus.
Features
• Alignment-free VCO and filter
• Audio multiplexing decoder
dbx noise reduction decoder
sound processor
— Two external inputs
— Quasi-surround
— Bass control
— Treble control
— Volume control
are all included in a single chip. Almost any soft of
signal processing is possible through this IC.
• Input level, separation adjustments and each mode
control are possible through I2C bus.
Applications
TV, VCR and other decoding systems for US audio
multiplexing TV broadcasting
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage VCC 11 V
• Operating temperature Topr –20 to +75 °C
• Storage temperature Tstg –65 to +150 °C
• Allowable power dissipation
PD 0.6 W
Range of Operating Supply Voltage
9 ± 0.5 V
– 1 –
E99832-PS
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
CXA2134Q
48 pin QFP (Plastic)
∗
A license of the dbx-TV noise reduction system is required for the use of this device.
– 2 –
CXA2134Q
Block Diagram
VGR
IREF
DGND
SCL
SDA
SAPOUT
SAPIN
STIN
VE
VEWGT
VETC
VEOUT
VCAIN
VCAWGT
VCATC
MAININ
MAINOUT
SUBOUT
PLINT
PCINT1
COMPIN
V
CC
GND
NOISETC
SAPTC
AUX2-L
IREF
SW
LPF LPF
HPF
RMSDET
RMSDET
VCA
VE
DeEm
LOGIC
MATRIX
VCA
LPF
LPF
1/21/4VCOLFLT
VCA LPF
BPF
SAPVCO
LPF
NOISE
DET
SAPIND
"PONRES"
STIND
"SAP"
"NOISE"
NRSW/FOMO/SAPC
WIDEBAND
SPECTRAL
"STEREO"
DeEm
FLT
AMP
(+4dB)
I
2
C BUS I/F
(+6dB)
LSOUT-L
LSOUT-R
VOL-L
VOL-R
VOL-L
VOL-R
TREB
SURROUND
TREBLE
TREB
AUX1-R
AUX1-L
AUX2-R
BASS-R
TRE-L
TRE-R
VOLIN-R
PCINT2
BASS
BASS
BASS
TVSW
SURRTC
BASS-L
TVOUT-L
TVOUT-R
FEXT2
FEXT1
EXT1/EXT2/M1
TOUT-R
ATT/ATTSW
28
27
26
8
9
21
19
17
23
18
24
25
22
SURR
M2
TOUT-L
VOLIN-L
13
10
11
12
34
33
37
36
39
38
40
2
45
47
41
44
43
3
4
48
1
31
32
30
29
5
6
7
1514
– 3 –
CXA2134Q
Pin Configuration (Top View)
25
26
27
28
29
30
36
35
34
31
32
33
AUX2-R
NC
AUX1-L
AUX1-R
VCAWGT
VCATC
VCAIN
VEOUT
VETC
VEWGT
VE
SAPIN
2
3
4
5
6
7
8
9
10
11
121
TOUT-L
BASS-L
LSOUT-R
SDA
SCL
DGND
PLINT
PCINT1
MAINOUT
MAININ
LSOUT-L
PCINT2
13
14
15
16
17
18
19
20
21
22
23
24
COMPIN
VGR
NC
GND
SAPTC
NC
STIN
NOISETC
IREF
V
CC
SAPOUT
SUBOUT
40
39
38
37
41
42
43
44
45
46
47
48
VOLIN-L
TRE-L
NC
BASS-R
SURRTC
TOUT-R
NC
TRE-R
TVOUT-L
TVOUT-R
AUX2-L
VOLIN-R
– 4 –
CXA2134Q
Pin Description (Ta = 25°C, Vcc = 9V)
Pin No.
Symbol
Pin
voltage
Equivalent circuit
Description
580
VCC
580
44
1
147
1
44
4.0V
4.0V
TOUT-L
TOUT-R
Treble output pin.
(Left channel)
Treble output pin.
(Right channel)
1.2k
5.4k
11k
1.2k
11k
147
2
45
Vcc
4V
2
45
4.0V
4.0V
BASS-L
BASS-R
Bass filter pin.
(Left channel)
Bass filter pin.
(Right channel)
580
580
VCC
3k
3
4
3
4
4.0V
4.0V
LSOUT-R
LSOUT-L
LSOUT right channel output
pin.
LSOUT left channel output
pin.
5
—SDA
Serial data I/O pin.
VIH > 3.0V
VIL < 1.5V
7.5k
4.5k
× 5
4k
3k
7.5k
V
CC
↓ 35µ
2.1V
× 2
5
– 5 –
CXA2134Q
6
—
SCL
Serial clock input pin.
VIH > 3.0V
VIL < 1.5V
7
—
DGND Digital block GND.
8
4.0V
MAININ
Input pin of (L + R) signal
from MAINOUT (Pin 9).
9
4.0V
MAINOUT
(L + R) signal output pin.
7
VCC
147
10k
53k
4V
VCC
8
147
1k
15k
↓
200µ
V
CC
× 4
9
Pin No.
Symbol
Pin
voltage
Equivalent circuit
Description
10.5k
VCC
4k
× 4
3k
7.5k
↓ 35µ
2.1V
6
– 6 –
CXA2134Q
10
4.0V
PCINT1
11
4.0V
PCINT2
Stereo block PLL loop filter
integrating pin.
12
5.1V
PLINT
Pilot cancel circuit loop filter
integrating pin.
(Connect a 1µF capacitor
between this pin and GND.)
13
4.0V
COMPIN
Audio multiplexing signal
input pin.
4k
VCC
× 2
10k
10k
2k
147
11
VCC
147
20k
20k
10k
20k
20k
20k
12
VCC
22k
3V
20k
4k 4k 4k 16k
24k
50k 147
3k
13
Pin No.
Symbol
Pin
voltage
Equivalent circuit
Description
VCC
147
10
30k
22k
– 7 –
CXA2134Q
14
1.3V
VGR
Band gap reference output
pin.
(Connect a 10µF capacitor
between this pin and GND.)
40k 40k 30k
30p 1.8k
16k
6.3k
147
30k 15k 30k
VCC
× 2
V
CC
15
15
1.3V
IREF
Set the filter and VCO
reference current. The
reference current is adjusted
with the BUS DATA based
on the current which flows to
this pin.
(Connect a 62kΩ (±1%)
resistor between this pin and
GND.)
17
—
GND Analog block GND.
17
19
—
Vcc Supply voltage pin.
19
18
4.5V
SAPTC
Set the time constant for the
SAP carrier detection circuit.
(Connect a 4.7µF capacitor
between this pin and GND.)
8k
4k
3k
10k
V
CC
↓ 50µ
1k
VCC
18
Pin No.
Symbol
Pin
voltage
Equivalent circuit
Description
11k
3k
9.7k
2.06k
19.4k
× 4
14
VCC
147
11k
11k
– 8 –
CXA2134Q
21
4.0V
SUBOUT (L – R) signal output pin.
23
3.0V
NOISETC
Set the time constant for the
noise detection circuit.
(Connect a 4.7µF capacitor
between this pin and GND.)
24
4.0V
SAPOUT SAP FM detector output pin.
25
4.0V
SAPIN
Input pin of (SAP) signal from
SUPOUT (Pin 24).
22
4.0V
STIN
Input pin of (L – R) signal
from SUBOUT (Pin 21).
3k
3k
3.3k
4k
4V
Vcc
8k
× 2
10k
1k
2k
Vcc
200k
23
24k
↓ 10µ
580
Vcc
5P
580
4k
↓ 50µ
10k
147
24
Pin No.
Symbol
Pin
voltage
Equivalent circuit
Description
22
2k 2k
2k
147
18k
4V
23k
2k2k
14.4k
4k
11.7k
20k
23k
580
580
4V
10P
4k
147
1k
147
18k
Vcc
21
VCC
25
– 9 –
CXA2134Q
26
4.0V
VE
Variable de-emphasis
integrating pin.
(Connect a 2700pF capacitor
and a 3.3kΩ resistor in series
between this pin and GND.)
Vcc
4V
36k
2.9V
580
147
580
8k
30k
↓ 8µ
4k
↓ 50µ
27
27
4.0V
VEWGT
Weight the variable
de-emphasis control
effective value detection
circuit.
(Connect a 0.047µF
capacitor and a 3kΩ resistor
in series between this pin
and GND.)
20k
↓ 7.5µ
4k
↓ 50µ
Vcc
× 4
× 4
28
28
1.7V
VETC
Determine the restoration
time constant of the variable
de-emphasis control
effective value detection
circuit.
(The specified restoration
time constant can be
obtained by connecting a
3.3µF capacitor between this
pin and GND.)
Vcc
10k
580
580
5P
29
29
4.0V
VEOUT
Variable de-emphasis output
pin.
(Connect a 4.7µF non-polar
capacitor between Pins 29
and 30.)
Pin No.
Symbol
Pin
voltage
Equivalent circuit
Description
147
26
VCC
7.5k
– 10 –
CXA2134Q
30
4.0VVCAIN
VCA input pin.
Input the variable
de-emphasis output signal
from Pin 29 via a coupling
capacitor.
↓
50µ
VCC
4k
20k
× 4
× 4
↓
7.5µ
31
31
1.7VVCATC
Determine the restoration
time constant of the VCA
control effective value
detection circuit.
(The specified restoration
time constant can be
obtained by connecting a
10µF capacitor between this
pin and GND.)
4k
VCC
30k 8k
36k
2.9V
3p
580
580
147
40k 40k
↓
50µ
↓
8µ
32
VCC
4V
27.5k
27.5k
147
10k
33
34
36
37
32
4.0VVCAWGT
Weight the VCA control
effective value detection
circuit.
(Connect a 1µF capacitor
and a 3.9kΩ resistor in series
between this pin and GND.)
33
4.0VAUX1-R
Right channel external input
1 pin.
34
4.0VAUX1-L
Left channel external input
1 pin.
36
4.0VAUX2-R
Right channel external input
2 pin.
37
4.0VAUX2-L
Left channel external input
2 pin.
Pin No.
Symbol
Pin
voltage
Equivalent circuit
Description
VCC
47k
20k
VCC
30
47k
– 11 –
CXA2134Q
38
4.0VTVOUT-R
TVOUT right channel output
pin.
39
4.0VTVOUT-L
TVOUT left channel output
pin.
40
4.0V
SURRTC
Set the center frequency of
the Surround circuit phase
shifter.
The frequency is determined
by the built-in resistor and
the external capacitor.
(Connect a 0.022µF
capacitor between this pin
and GND.)
43
4.0V
VOLIN-R
Volume right channel input
pin.
48
4.0V
VOLIN-L
Volume left channel input pin.
16
20
35
42
46
—
NC
1.2k6k1.2k
147
Vcc
5.7k
5.7k
41
47
41
4.0VTRE-R
Treble filter pin.
(Right channel)
47
4.0VTRE-L
Treble filter pin.
(Left channel)
VCC
4V
66k
147
10k
43
48
Pin No.
Symbol
Pin
voltage
Equivalent circuit
Description
40
147
38
39
20k
580
580
10k
20k
3k
24k
VCC
580
580
VCC
40k
Loading...