Sony CXA2559Q Datasheet
CXA2559Q
Playback Equalizer Amplifier with Music Sensor
Description
The CXA2559Q is an IC designed for use in car
stereo cassette decks. Functions include playback
equalizer amplifier and music sensor into a single
chip.
Features
• Few external parts
• Small package (40-pin QFP)
• Same pin configuration as for the Dolby B-C type
NR system (CXA2561Q) and Dolby B type NR
system (CXA2560Q)
• Playback equalizer amplifier and music sensor 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.
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings
• Supply voltage VCC 12 V
• Operating temperature Topr –40 to +85 °C
• Storage temperature Tstg –65 to +150 °C
• Power dissipation PD 430 mW
Operating Condition
Supply voltage VCC 6.5 to 11 V
40 pin QFP (Plastic)
Applications
• Car stereo cassette decks
• Playback-only cassette decks
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 –
E97661-PS
Block Diagram and Pin Configuration
PBOUT2
PBTC2
30
29
7k/12k
PBFB2
PBRIN2
PBGND
PBFIN2
PBREF
PBFIN1
PBGND
PBRIN1
PBFB1
VCT
31
32
33
34
35
36
37
38
39
40
45k
1
300k
F2
30k
30k
F1
300k
7k/12k
2
OUTREF2
28
3
TAPEIN2
27
100k
70µ/120µ
×1
×1
100k
70µ/120µ
4
T2
26
T1
5
GND
LPF
DIREF
25
24
BIAS
MUTE
TAPE EQ
FWD/RVS
VCC
F3
6
LINEOUT2
23
8
7
NC
24dB
24dB
NC
21
22
MS MODE
MS ON/
OFF
DET
9
10
MSSW
20
19
18
17
16
15
14
13
12
11
CXA2559Q
MSMODE
DRSW
TAPESW
MUTESW
NC
NC
MSOUT
MSTC
G1FB
G2FB
PBTC1
PBOUT1
TAPEIN1
OUTREF1
Vcc
NC
NC
LINEOUT1
NC
MSLPF
– 2 –
CXA2559Q
Pin Description (Ta = 25°C, VCC = 8.0V, DVCC = 5.0V)
Pin
No.
1
30
Symbol
PBTC1
PBTC2
229PBOUT1
PBOUT2
Typical pin voltage
DC AC
4.0V —
4.0V –25dBm
I/O
I/O
resistance
——
O
—
30
29
Equivalent circuit Description
Vcc
147
1
GND
40
31
300k
2
147
2p
200
200
Vcc
Playback equalizer
amplifier
capacitance.
Playback equalizer
amplifier output.
3
28
4
27
OUTREF1
OUTREF2
TAPEIN1
TAPEIN2
4.0V —
4.0V
–30dBm
GND
Vcc
O
I 100kΩ TAPE input.
—
3
28
4
27
200
200
147
100k
VGS
GND
Vcc
30p
GND
Output reference.
(Vcc/2 output)
Vcc 8.0V5 — — — Power supply.
– 3 –
CXA2559Q
(Ta = 25°C, VCC = 8.0V, DVCC = 5.0V)
Pin
No.
Symbol
724LINEOUT1
LINEOUT2
MSLPF
10
Typical pin voltage
DC AC
4.0V –6dBm
4.0V
—
I/O
I/O
resis-
Equivalent circuit Description
tance
Vcc
200
147
24
7
10
200
147
100k
64p
22.5k
GND
Vcc
Cut-off frequency
adjustment of the
music sensor LPF.
O — Line output.
— 100k
11
12
13
G2FB
G1FB
MSTC
4.0V
—
—
—
—
—
—
—
12
11
13
147
147
853
500
500
10k
GND
Vcc
Music signal
interval detection
level setting.
GND
Vcc
Time constant for
detecting the
music signal
interval.
– 4 –
GND
CXA2559Q
(Ta = 25°C, VCC = 8.0V, DVCC = 5.0V)
Pin
No.
Symbol
14 MSOUT
17
MUTESW
18
TAPESW
Typical pin voltage
DC AC
0.2V
when a
signal is
detected
; DVcc
—
when no
signal is
detected
0.0V
when
—
open
I/O
resis-
I/O
tance
O—
I 100kΩ
Equivalent circuit Description
Vcc
14
GND
Vcc
147
17
18
100k
21
Music sensor
output.
Mute function
control.
Low (open) :
Mute OFF
High: Mute ON
Playback
equalizer amplifier
control.
Low (open) : 70µs
High: 120µs
21
MSSW
0.0V
19 DRSW
when
—
open
0.0V
20 MSMODE I
when
—
open
I
100kΩ
100kΩ
20
16
19
147
100k
147
100k
GND
Vcc
GND
Vcc
Music sensor
control.
Low (open) :
MS ON
High : MS OFF
Head select
control.
Low (open) :
FORWARD
High: REVERSE
Music sensor
mode control.
Low (open): G1
High: G2
– 5 –
GND
CXA2559Q
(Ta = 25°C, VCC = 8.0V, DVCC = 5.0V)
Pin
No.
Symbol
25 DIREF — —
26
GND
31
PBFB2
40
PBFB1
Typical pin voltage
DC
AC
1.2V —
0.0V
4.0V
—
–70dBm
I/O
I/O
resistance
—
I—
3239PBRIN2
PBRIN1
34
37
PBFIN2
PBFIN1
4.0V
–70dBm
I
—
—
Equivalent circuit Description
Vcc
Resistance for
setting the
reference current.
147
25
(Connects 18kΩ
between DIREF
pin and GND for
the standard
setting.)
GND
Ground.
Playback
Vcc
equalizer amplifier
feedback.
Playback
32
150 150
39
34
37
50p50p
equalizer amplifier
input.
31
(REVERSE head
40
connected)
Playback
GND
equalizer amplifier
input.
(FORWARD head
connected)
33
PBGND
38
35 VCT
0.0V —
4.0V —
—
—
O—
35
147
45k
30k
30k
×1
VGS
Playback
equalizer amplifier
ground.
(Connect to GND.)
Vcc
Center.
(Vcc/2 output)
GND
– 6 –
Loading...