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Электронный компонент: CXA1910Q

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--1--
E93Z04-TE
Absolute Maximum Ratings (Ta=25C)
Supply voltage
V
CC
12
V
Operating temperature Topr
40 to +85
C
Storage temperature
Tstg
65 to +150
C
Allowable power dissipation
P
D
430
mW
Recommended Operating Condition
Supply voltage
V
CC
6.5 to 11
V
Description
The CXA1910Q is an IC designed for use in car
stereos. Functions include Dolby B type noise
reduction, playback equalizer amplifier and Music
sensor into a single chip.
Features
Few external parts
Forward/Reverse head switching
Small package (40-pin QFP)
Dolby B type noise reduction and playback
equalizer into a single chip
Same pin configuration as Dolby B/C type noise
reduction system (CXA1911)
Music sense level can be set by external
resistors/capacitors (2 modes).
High-band cut filter frequency can be adjusted by
the external capacitance.
Applications
Car stereos
Stereo cassette deck players (playback only)
Structure
Bipolar silicon monolithic IC
Dolby B Type Noise Reduction System with Playback Equalizer
40 pin QFP (Plastic)
CXA1910Q
These ICs are 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 trade marks 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.
For the availability of this product, please contact the sales office.
--2--
CXA1910Q
Block Diagram and Pin Configuration
NC
TAPESW
DRSW
NRMODE
MSSW
MSMODE
G1 (FF)
G2 (NOR)
MSTC
MSOUT
MS
G
N
D
TC
2
NC2
LI
N
E
O
U
T
2
D I
R
E
F
MS
L
P
F
NC
T
APEI
N
2
Vc
c
PBO
U
T
2
NRS
W
TC
1
NC1
LI
N
E
O
U
T
1
VC
T
NC
NC
T
APEI
N
1
GN
D
PBO
U
T
1
PBTC1
PBFB1
PBRIN1
PBFIN1
PBGND
E IREF
PBFIN2
PBRIN2
PBFB2
PBTC2
300k
300k
10dB
DET
MS
MODE
NR
DR
TA PE
IN
G1/G2
LPF
NR OFF
NR ON
NR ON
NR OFF
F/R
F/R
A UX
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
22
21
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
NR
NR
--3--
CXA1910Q
Pin Description
(Ta=25C, V
CC
=8.0V, no signal)
Pin
Symbol
DC
Z (in)
Equivalent circuit
Description
No.
value
1
PBOUT
2.1V
--
30
32
PBFB
2.1V
300k
39
33
PBIN
0V
--
34
37
38
2
V
CC
8.0V
--
10
MSGND
0.0V
--
29
GND
35
PBGND
31
PBTC
--
--
40
36
E IREF
1.25V
--
11
MSOUT
0.0V for
--
signal
detection;
5.0V for
no signal
detection
PBEQ output
PBEQ feedback
PBEQ input
Power supply
Ground
PBEQ capacitance
Reference current setting
resistor pin
MS output
147
42
30
Vcc
GND
31
40
147
10
1.25V
Vcc
GND
36
147
Vcc
GND
20k
V
DD
=5V
11
Refer to Page 6.
--4--
CXA1910Q
Pin
Symbol
DC
Z (in)
Equivalent circuit
Description
No.
value
12
MSTC
Approx.
--
1.4V for
signal
detection;
5.0V for
no signal
detection
13
G2(NOR)
4.0V
--
14
G1(FF)
3
TAPEIN
4.0V
40k
28
6
D IREF
1.25V
--
7
LINEOUT
4.0V
--
24
Connection of MS detection
time constant
MS feedback
TAPE input
Connection of reference
current setting resistor for
Dolby block
Line output
147
Vcc
GND
1k
50
V
DD
=5V
12
100k
147
Vcc
GND
100
10
14
13
147
Vcc
GND
40k
15
to VGS
28
3
147
50
1.25V
Vcc
GND
8k
6
147
Vcc
GND
200
200
7
24
--5--
CXA1910Q
Pin
Symbol
DC
Z (in)
Equivalent circuit
Description
No.
value
9
TC
0.3V
--
22
15
MSMODE
--
--
17
NRMODE
18
DRSW
19
TAPESW
21
NRSW
16
MSSW
--
--
25
VCT
4.0V
--
4
NC
--
--
8
20
23
26
27
5
MSLPF
4.0V
100k
Time Constant pin for the level
detector
Refer to Page 6.
Refer to Page 6.
V
CC
/2 output
No connection.
Capacitance connection for
adjusting the MS LPF time
constant.
Vcc
GND
20k
6
600k
22
9
0.5
0.5
147
2
147
Vcc
GND
50
21
19
18
17
15
147
Vcc
GND
50
50
16
147
Vcc
GND
to VGS
45k
30k
30k
50
25
147
V
CC
GND
100 k
5
64p