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PDF CXA2561Q Data sheet ( Hoja de datos )
| Número de pieza | CXA2561Q | |
| Descripción | Dolby B-C Type Noise Reduction System with Playback Equalizer Amplifier | |
| Fabricantes | Sony Corporation | |
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CXA2561Q
Dolby∗ B-C Type Noise Reduction System with Playback Equalizer Amplifier
Description
The CXA2561Q is an IC designed for use in car
stereo cassette decks. Functions include Dolby B-C
type noise reduction (NR) system, playback equalizer
amplifier and music sensor into a single chip.
40 pin QFP (Plastic)
Features
• Few external parts
• Small package (40-pin QFP)
• Same pin configuration as for the Dolby B type NR
system (CXA2560Q) and no Dolby NR system
(CXA2559Q)
• Dolby B-C type NR and playback equalizer
amplifier into a single chip
• FORWARD/REVERSE head select switch
• Mute function
• Music signal interval detection level can be set by
the external resistors/capacitors (2 modes).
• High-frequency cut-off of the music sensor circuit
can be adjusted by the external capacitance.
Applications
• Car stereo cassette decks
• Playback-only cassette decks
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings
• Supply voltage
VCC
• Operating temperature Topr
• Storage temperature Tstg
• Power dissipation
PD
12
–40 to +85
–65 to +150
430
V
°C
°C
mW
Operating Condition
Supply voltage
VCC
7.8 to 11
V
∗ This IC is available only to the licensees of Dolby Laboratories Licensing Corporation from whom licensing and applications
information may be obtained.
∗ "Dolby" and the double D symbols are trademarks of Dolby Laboratories Licensing Corporation.
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–
E97439A79-PS
1 page  
Pin
No.
Symbol
Typical pin voltage
I/O
DC AC
I/O
resis-
tance
CXA2561Q
(Ta = 25°C, VCC = 8.0V, DVCC = 5.0V)
Equivalent circuit
Description
Vcc
11 G2FB
12 G1FB
4.0V
—
—
—
147
11
12
500 Music signal interval
detection level
500 setting.
GND
Vcc
13 MSTC
—
— ——
147 853
13
10k
Time constant for
detecting the music
signal interval.
0.2V
when a
signal is
14 MSOUT
detected;
DVcc
—
O
—
when no
signal is
detected.
14
15 NRMODE
17 MUTESW
18 TAPESW
0.0V
when
open.
—
I
15
100kΩ 17
147
18 100k
21
21 MSSW
–5–
GND
Vcc
Music sensor
output.
GND
Dolby NR mode
control.
Low (open):
Dolby B NR
High: Dolby C NR
Vcc Mute function
control.
Low (open):
Mute OFF
High: Mute ON
Playback equalizer
amplifier control.
Low (open): 70µs
High: 120µs
GND
Music sensor
control.
Low (open): MS ON
High: MS OFF
5 Page 
Application Circuit
CXA2561Q
C7
0.01µ
R8
10k
LINEOUT2
GND GND
GND GND
C9 R9 C12 C14 C16
0.1µ 20k 0.47µ 0.1µ 0.068µ
RVS2
FWD2
FWD1
RVS1
C4 R6
470p 180
R4
100k
R3
100k
C3
470p
C2
470p
R2
100k
R1
100k
C1
470p
R5
180
PBFB2
31
30 29 28
7k/12k
PBRIN2
32
PBGND
33
PBFIN2
34
C5
22µ VCT
35
45k
PBREF
36
PBFIN1
37
PBGND
38
300k
F2
30k
30k
F1
PBRIN1
39
300k
PBFB1
40
7k/12k
1 23
27 26 25 24 23 22 21
100k
T2
×1
BIAS
NR
OFF/
B/C
MS MODE
MSMODE
20
DRSW
19
TAPESW
18
MUTE
TAPE EQ
FWD/RVS
VCC
LPF
MUTESW
17
NRSW
NR MODE 16
NRMODE
15
MS ON/
OFF MSOUT
DET
14
×1
T1
100k
F3
OFF/
B/C
NR
MSTC
13
G1FB
12
G2FB
11
4 5 6 7 8 9 10
R10 R11
3.9k 39k
From
Microcomputer
R13
100k
To Microcomputer
DVCC
C18
0.1µ
R12
1MEG
C6
0.01µ
R7
10k
C8
0.1µ
Vcc
C10
22µ
GND
C11
0.47µ
C13
0.1µ
C15
0.068
µ
C17
120p
GND GND GND
LINEOUT1
C19 C20
0.47µ 4.7n
GND GND
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for
any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
– 11 –
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet CXA2561Q.PDF ] | |
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