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PDF CXA2020M Data sheet ( Hoja de datos )
| Número de pieza | CXA2020M | |
| Descripción | EIAJ Sound Multiplexing Decoder | |
| Fabricantes | Sony Corporation | |
| Logotipo |  |
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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
1 page  
CXA2020M/S
Pin No.
Symbol
SOP SDIP
Pin
voltage
20 16 ROUT
4.1V
21 17 LOUT
4.1V
22 18 MCIN
4.1V
23 19 MCOUT
3.4V
25 20 SCIN
4.1V
26 21 SCOUT
3.9V
28 22 SUBI
4.1V
Equivalent circuit
Description
Vcc 147
17.2k
20
(16) 32k
1.5m
32k
Vcc
GND
R-ch output.
Vcc 147
17.2k
21
(17) 32k
1.5m
32k
Vcc
GND
L-ch output.
During "TEST", the Cue
signal component
passed through the Cue
BPF is output.
Vcc Vcc
147
147
23
(19) 147
147
22
(18) 16k
160µ
4.2V
80µ 80µ
Vcc
20P
GND
Vcc Vcc
147
26
(21) 8k
Vcc
40k
147
25
(20) 147
16k
4.2V
4.2V
320µ
20P
80µ 80µ
GND
80µ 20µ
Vcc
Vcc 16k
64k
16k 1k
8k 8k
28
(22) 147
4.2V
147
1.7V
DC cut capacitor
connection of main
signal.
DC cut capacitor
connection of sub
signal.
Bias capacitor
connection of sub FM
detector. "TEST" mode,
used for filter
adjustment, is
activated by grounding
this pin.
–5–
5 Page 
CXA2020M/S
SW Bias
No.
Item
Symbol condi- condi-
tions tions
Conditions
Measure-
ment Min. Typ. Max. Unit
point
Input signal: SIG2
Caluculate the level
difference between the
28
Mute volume
SUB
Ms 4
4
output amplitude of Pins
20 and 21 (16 and 17)
(VMs) and the
measured value (Vs2)
in measurement No. 3.
Pins
20 and 21
(16 and
17)
70
80
—
dB
Ms = 20log
Vs2
VMs
(dB)
(15kLPF, 1kBPF)
29
Mute volume
stereo
Input signals: SIG4, 5
Measure the level
difference between the
output signals of Pins 20
Mst
4
2
and
4
and 21 (16 and 17)
under bias conditions
2 and 4.
Mst = Measured value
under bias
Pins
20 and 21
(16 and
17) ∗2
70
20log
condition 2 (mVrms)
Measured value
under bias
condition 4 (mVrms)
30
DC offset
stereo L-ch
Input signal: SIG18
Ostl
3
2
and
4
Measure the fluctuation
in the output DC level of
Pin 21 (17) under bias
Pin 21
(17)
conditions 2 and 4.
—
80 — dB
20 100 mV
31
DC offset
stereo R-ch
Ostr 3
Input signal: SIG18
2
and
4
Measure the fluctuation
in the output DC level of
Pin 20 (16) under bias
Pin 20
(16)
conditions 2 and 4.
— 20 100 mV
32
DC offset
MAIN OUT
Input signal: No signal
Om
3
2
and
4
Measure the fluctuation
in the output DC level of
Pin 19 (15) under bias
Pin 19
(15)
conditions 2 and 4.
— 20 100 mV
33
Cue detection
sensitivity
CD
4
Input signal: SIG12
Change SIG12 and
2
measure amount of
attenuation at the point
"monaural" switches to
"Sound multiplex".
—
9 14 17 dB
34
SUB detection
sensitivity
SD
4
Input signal: SIG13
Change SIG13 and
2
measure amount of
attenuation at the point
"monaural" switches to
"Sound multiplex".
—
10 13 18 dB
∗2 Measure Pin 21 for SIG4 input; Pin 20 for SIG5 input.
– 11 –
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet CXA2020M.PDF ] | |
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