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Sony Semiconductor Electronic Components Datasheet

CXA2020S Datasheet

EIAJ Sound Multiplexing Decoder

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CXA2020S pdf
CXA2020M/S
EIAJ Sound Multiplexing Decoder
Description
The CXA2020M/S, is a bipolar IC designed as
EIAJ TV sound multiplexing decoder, provides
various functions including sound multiplexing
demodulation, broadcast mode identification
(stereo/bilingual discrimination display), mode
display, and muting.
Features
Adjustment free of filter.
High frequency stereo separation improved.
An internal active filter greatly reduces the external
parts.
Use of the countdown method for broadcast mode
identification eliminates the necessity of adjusting
the identification system (Cue oscillator).
Output level: 520mVrms (1kHz, monaural, 100%).
Internal filter eliminates interference from digital
facsimile signals.
The discrimination time needed to shift from
multiplexing sound to monaural sound is reduced.
Forced monaural mode can be set to operate only
for stereo broadcasts or for stereo/bilingual
broadcasts.
Applications
Color TVs
Hi-Fi VCRs
Structure
Bipolar silicon monolithic IC
Pin Configuration CXA2020M
GND 1
NC 2
REFL 3
Vcc 4
NC 5
MO MODE 6
MPX IN 7
NC 8
CUBI 9
NC 10
LEDST 11
LEDSU 12
LEDM 13
NC 14
28 SUBI
27 NC
26 SC OUT
25 SC IN
24 NC
23 MC OUT
22 MC IN
21 L OUT
20 R OUT
19 M OUT
18 FOMO
17 MUTE
16 MODE
15 NC
CXA2020M
28 pin SOP (Plastic)
CXA2020S
22 pin SDIP (Plastic)
Absolute Maximum Ratings (Ta = 25°C)
[ ( ) is the pin No. for the CXA2020S.]
Supply voltage
VCC
10 V
Input signal (Pin 6) Vis
0.6 Vp-p
Control voltage
(Pins 5, 12, 13, 14) Vic
VCC
V
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –65 to +150 °C
Allowable power dissipation
PD (A2020M) 1000 mW
(A2020S) 900 mW
LED drive current
ILED
10 mA
Operating Supply Voltage Range 8.5 to 9.5 V
CXA2020S
GND 1
NC 2
REFL 3
Vcc 4
MO MODE 5
MPX IN 6
NC 7
CUBI 8
LEDST 9
LEDSU 10
LEDM 11
22 SUBI
21 SC OUT
20 SC IN
19 MC OUT
18 MC IN
17 L OUT
16 R OUT
15 M OUT
14 FOMO
13 MUTE
12 MODE
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.
–1–
E94Y28-ST


Sony Semiconductor Electronic Components Datasheet

CXA2020S Datasheet

EIAJ Sound Multiplexing Decoder

No Preview Available !

CXA2020S pdf
Block Diagram
CXA2020M
CXA2020M/S
28 27 26 25 24 23 22 21 20 19 18 17 16 15
SUBDEEM
FM
DEMOD
MAINDEEM
OUTPUT AMP
& OUTPUT SW
MAIN
LR
SUB
MATRIX
MAIN
OUT
BIAS
CURRENT
BUFFER
BIAS
VOLTAGE
IBIAS
VOLTAGE
REGULATOR
1
2
34
5
SUB
DET
SUB
BPF
IIL LOGIC & CONT
CUE
CARRIER
3.5fH 952Hz
CLOCK CLOCK
3.5fH
VCO
4.5fH
TRAP
CUE
BPF
AM 952Hz
DEMOD BPF
COMP
LED
DRIVE
MPX SIGNAL
6 7 8 9 10 11 12 13
14
CXA2020S
22 21 20 19 18 17 16 15 14 13 12
TEST
SUBDEEM
FM
DEMOD
MAINDEEM
OUTPUT AMP
& OUTPUT SW
MAIN
LR
SUB
MATRIX
MAIN
OUT
BIAS
CURRENT
IBIAS
BUFFER
BIAS
VOLTAGE
VOLTAGE
REGULATOR
1 23 4
SUB
DET
SUB
BPF
IIL LOGIC & CONT
CUE
CARRIER
3.5fH 952Hz
CLOCK CLOCK
3.5fH
VCO
4.5fH
TRAP
CUE
BPF
AM
DEMOD
952Hz
BPF
COMP
LED
DRIVE
MPX SIGNAL
5 6 7 8 9 10 11
–2–


Part Number CXA2020S
Description EIAJ Sound Multiplexing Decoder
Maker Sony Corporation
Total Page 18 Pages
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