CXA2020S Sony, CXA2020S Datasheet

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CXA2020S

Manufacturer Part Number
CXA2020S
Description
EIAJ Sound Multiplexing Decoder
Manufacturer
Sony
Datasheet

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Description
EIAJ TV sound multiplexing decoder, provides
various functions including sound multiplexing
demodulation,
(stereo/bilingual
display, and muting.
Features
• Adjustment free of filter.
• High frequency stereo separation improved.
• An internal active filter greatly reduces the external
• Use of the countdown method for broadcast mode
• Output level: 520mVrms (1kHz, monaural, 100%).
• Internal filter eliminates interference from digital
• The discrimination time needed to shift from
• Forced monaural mode can be set to operate only
Applications
• Color TVs
• Hi-Fi VCRs
Structure
Pin Configuration
The CXA2020M/S, is a bipolar IC designed as
parts.
identification eliminates the necessity of adjusting
the identification system (Cue oscillator).
facsimile signals.
multiplexing sound to monaural sound is reduced.
for stereo broadcasts or for stereo/bilingual
broadcasts.
Bipolar silicon monolithic IC
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.
EIAJ Sound Multiplexing Decoder
MO MODE
MPX IN
LEDSU
LEDST
LEDM
REFL
CUBI
GND
Vcc
NC
NC
NC
NC
NC
broadcast
discrimination
10
12
13
14
11
1
2
4
5
7
8
3
6
9
CXA2020M
mode
17
15
28
27
25
24
22
21
19
18
16
26
23
20
display),
SUBI
NC
SC OUT
SC IN
NC
MC OUT
MC IN
L OUT
R OUT
M OUT
MUTE
MODE
NC
FOMO
identification
mode
– 1 –
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage
• Input signal (Pin 6)
• Control voltage
• Operating temperature Topr
• Storage temperature
• Allowable power dissipation
• LED drive current
Operating Supply Voltage Range
[ ( ) is the pin No. for the CXA2020S.]
(Pins 5, 12, 13, 14)
28 pin SOP (Plastic)
CXA2020M/S
MO MODE
CXA2020M
MPX IN
LEDSU
LEDST
LEDM
REFL
CUBI
GND
Vcc
NC
NC
10
11
1
4
2
3
5
6
9
7
8
CXA2020S
V
Vis
Vic
Tstg
P
I
LED
CC
D
22 pin SDIP (Plastic)
(A2020M) 1000
(A2020S) 900
22
21
19
18
17
16
15
14
13
12
20
SUBI
SC OUT
SC IN
MC OUT
MC IN
L OUT
R OUT
M OUT
MUTE
MODE
FOMO
CXA2020S
–65 to +150
–20 to +75
8.5 to 9.5
V
0.6
10
E94Y28A1Y-PS
CC
10
Vp-p
mW
mW
mA
°C
°C
V
V
V

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CXA2020S Summary of contents

Page 1

... CXA2020M/S CXA2020M 28 pin SOP (Plastic) identification display), mode Absolute Maximum Ratings (Ta = 25° the pin No. for the CXA2020S.] • Supply voltage • Input signal (Pin 6) • Control voltage (Pins 5, 12, 13, 14) • Operating temperature Topr • Storage temperature • Allowable power dissipation • ...

Page 2

... Block Diagram CXA2020M SUBDEEM FM DEMOD BUFFER BIAS CURRENT BIAS VOLTAGE VOLTAGE IBIAS REGULATOR CXA2020S SUBDEEM FM DEMOD BUFFER BIAS CURRENT BIAS VOLTAGE VOLTAGE IBIAS REGULATOR OUTPUT AMP MAINDEEM & OUTPUT SW MAIN L R SUB MATRIX SUB DET CUE CARRIER SUB BPF 4.5f CUE ...

Page 3

... NC — REFL 1. — MODE — MPXIN 4. CUBI 4.1V = 9V) The pin numbers in parentheses are for the CXA2020S. Equivalent circuit — Vcc 147 3 3.3k 20k 24k 6 (5) 10.5k Vcc 147 7 (6) 25k 80µ Vcc 1k 147 40k 9 40k 40k (8) – 3 – Description GND. Keep these pins open. ...

Page 4

Pin No. Pin Symbol voltage SOP SDIP 11 9 LEDST — LEDSU 13 11 LEDM 16 12 MODE — MUTE — FOMO — MOUT 4.1V Equivalent circuit 11 (9) 12 (10) 13 ...

Page 5

Pin No. Pin Symbol voltage SOP SDIP 20 16 ROUT 4. LOUT 4. MCIN 4. MCOUT 3. SCIN 4. SCOUT 3.9V 28 SUBI 4.1V 22 Equivalent circuit Vcc Vcc 147 ...

Page 6

Electrical Characteristics Measurement Circuit (CXA2020M) ON OFF SW6 C10 10µF TEST NORM (ON) (OFF) SW4 C9 1µ 10µF C2 47µF SIG SIGNAL GND C10 1µ ...

Page 7

... Dstl 4 L-ch Stereo 8 distortion Dstr 4 R-ch 1 When bias condition is "3", measurement point is Pin 20 only. = 9V) The pin numbers in parentheses are for the CXA2020S. CC Bias condi- Conditions tions Measure current 1 input to Pin 4 Input signal: SIG1 Measure output amplitude 2 (400Hz, sine wave) and ...

Page 8

SW No. Item Symbol condi- tions Stereo 9 output level Vstl 4 L-ch 1kHz Stereo 10 output level Vstr 4 R-ch 1kHz Main 11 output level Vm1 4 MAIN OUT Main 12 Vm2 4 output level Main frequency 13 Fm1 ...

Page 9

SW No. Item condi- Symbol tions 16 Main distortion Dm2 4 Main distortion 17 at maximum Dm3 4 input 18 Main S/N ratio Nm 4 Stereo 19 separation Sstr Stereo 20 separation Sstl Cross ...

Page 10

SW No. Item condi- Symbol tions Cross talk 22 Csm1 2 SUB MAIN Cross talk 23 MAIN SUB Cms2 2 BOTH mode Cross talk 24 SUB MAIN Csm2 2 BOTH mode Residual 25 carrier Lcs 3 SUB Residual 26 carrier ...

Page 11

SW No. Item condi- Symbol tions Mute volume SUB Mute volume 29 Mst 4 stereo DC offset 30 Ostl 3 stereo L-ch DC offset 31 Ostr 3 stereo R-ch DC offset MAIN OUT Cue ...

Page 12

SW No. Item condi- Symbol tions 35 Cue BPF gain CG 5 4.5f trap H attenuation level SW Condition Table off off off 2 off on off 3 off off on ...

Page 13

Input Signal Definition SIG1 : Sound MPX signal Main : 0% Sub : 400Hz, 100% MOD Cue : Bilingual SIG2 : Sound MPX signal Main : 0% Sub : 1kHz, 100% MOD Cue : Bilingual SIG3 : Sound MPX signal ...

Page 14

... MONO ON DC Voltage range 4. 3V(or open 0. 0.5V (or open 0.5V (or open 0.5V (or open) The information in parentheses is for the CXA2020S. carrier component is eliminated from the Cue signal after AM wave detection. – 14 – LED On/Off condition R MAIN STEREO SUB OFF OFF OFF DC DC OFF ...

Page 15

Main circuits In MAIN DEEM, de-emphasis is applied to the Main signal component and the Sub and Cue components are removed. After passing through the MAIN DEEM, the Main signal is applied to MATRIX, OUTPUT AMP, and MAINOUT. 3. ...

Page 16

... SW5: F. MONO- Forced monaural mode operates only for stereo. F. MAIN- Forced monaural mode operates for both stereo and bilingual. C10 10µ 10µF 1µF 1µ 10µF 10µ CXA2020S 10µF 10µF C1 10µF SW5 70mVrms C2 (MONO VR2 47µF 100%) 1k SW5: F. MONO- Forced monaural mode operates only for stereo. ...

Page 17

Example of Representative Characteristics De-emphasis characteristics 0 –5 –10 –15 100 1k Frequency [Hz] Cue BPF frequency characteristics 0 –20 –40 –60 3.5f 3.5f 3. –40k –20k Frequency [Hz] Main Sub 10k 3.5f 3. +20k ...

Page 18

... Package Outline Unit: mm CXA2020M SONY CODE EIAJ CODE JEDEC CODE SCT Ass'y SONY CODE EIAJ CODE JEDEC CODE LEAD PLATING SPECIFICATIONS LEAD MATERIAL SOLDER COMPOSITION PLATING THICKNESS 28PIN SOP (PLASTIC) + 0.4 18.8 – 0 1.27 0.45 ± 0.1 0.24 M PACKAGE STRUCTURE PACKAGE MATERIAL ...

Page 19

... Package Outline Unit: mm CXA2020S 22 1 SONY CODE EIAJ CODE JEDEC CODE 22PIN SDIP (PLASTIC) + 0.4 19.2 – 0 1.778 0.5 ± 0.1 Two kinds of package surface: 1.All mat surface type. + 0.15 0.9 – 0.1 2.All mirror surface type. PACKAGE STRUCTURE MOLDING COMPOUND ...

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