CXA2020M/S
EIAJ Sound Multiplexing Decoder
Description
CXA2020M
CXA2020S
The CXA2020M/S, is a bipolar IC designed as
EIAJ TV sound multiplexing decoder, provides
various functions including sound multiplexing
28 pin SOP (Plastic)
22 pin SDIP (Plastic)
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.
Absolute Maximum Ratings (Ta = 25°C)
[ ( ) is the pin No. for the CXA2020S.]
• Supply voltage
VCC
Vis
10
0.6
V
Vp-p
• Input signal (Pin 6)
• Control voltage
(Pins 5, 12, 13, 14)
Vic
VCC
V
°C
• Operating temperature Topr
• Storage temperature Tstg
• Allowable power dissipation
–20 to +75
–65 to +150 °C
PD (A2020M) 1000
(A2020S) 900
ILED 10
mW
mW
mA
• LED drive current
Operating Supply Voltage Range 8.5 to 9.5
V
Applications
• Color TVs
• Hi-Fi VCRs
Structure
Bipolar silicon monolithic IC
Pin Configuration
CXA2020M
CXA2020S
GND
NC
1
2
SUBI
28
22
21
20
19
18
17
16
15
14
13
GND
SUBI
1
2
3
4
5
6
7
8
9
27 NC
NC
SC OUT
SC IN
REFL
3
26
25
SC OUT
SC IN
REFL
Vcc
4
Vcc
MC OUT
MC IN
NC
MO MODE
MPX IN
NC
5
24 NC
6
23 MC OUT
22 MC IN
MO MODE
7
MPX IN
NC
L OUT
R OUT
M OUT
FOMO
MUTE
8
21
20
L OUT
R OUT
CUBI
9
NC
19 M OUT
CUBI
LEDST
10
11
12
13
14
18
LEDST
FOMO
17
LEDSU
LEDM
MUTE
LEDSU 10
11
16
15
MODE
NC
LEDM
12 MODE
NC
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.
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E94Y28A1Y-PS