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QQ
3 7 63 1515 0
6.4
CXA2560Q (IC401) : Dolby B type noise reduction system with play back equalizer amp.
• Pin layout & block diagram
30
29
28
27
26
7k/12k
PBFB2
31
100k
PBRIN2
32
300k
T2
-
1
PBGND
33
+
F2
PBFIN2
34
30k
VCT
35
45k
PBREF
36
30k
PBFIN1
37
F1
+
PBGND
38
-
1
T1
300k
PBRIN1
39
100k
7k/12k
PBFB1
40
1
2
3
4
• Pin function
Pin No.
Symbol
I/O
1
PBTC1
-
TE
2
PBOUT1
L 13942296513
O
3
OUTREF1
O
4
TAPEIN1
I
5
Vcc
-
6
NC
-
7
LINEOUT1
O
Line output
8
TCH1
-
9
NC
-
10
MSLPF
-
11
G2FB
-
12
G1FB
-
13
MSTC
-
Time constant for detecting
14
MSOUT
O
15
NC
-
16
NRSW
I
17
MUTESW
I
18
TAPESW
I
Playback equalizer amplifier
www
19
DRSW
I
20
MSMODE
I
.
21
MSSW
I
22
NC
-
23
TCH2
-
1-26 (No.49875)
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25
24
23
22
21
MSMODE
NR
20
OFF/B
DRSW
19
MS MODE
BIAS
TAPESW
18
MUTE
MUTESW
17
TAPE EQ
NRSW
NR MODE
16
FWD/RVS
NC
15
Vcc
MS ON/
LPF
OFF
+
MSOUT
14
-
DET
F3
MSTC
13
G1FB
12
OFF/B
G2FB
11
NR
5
6
7
8
9
10
Function
Playback equalizer amplifier
capacitance
Playback equalizer amplifier
output
Output reference
TAPE input
Power supply
Time constant for the HLS
Cut-off frequency adjustment
of the music sensor LPF
Music signal interval detection
Music signal interval detection
music signal interval
Music sensor out
No use
Dolby NR control
Mute function control
control
Head select control
x
ao
y
Music sensor mode control
i
Music sensor control
Time constant for the HLS
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8
Pin No.
Symbol
24
LINEOUT2
25
DIREF
Q Q
3
6 7
1 3
26
GND
27
TAPEIN2
28
OUTREF2
29
PBOUT2
30
PBTC2
31
PBFB2
32
PBRIN2
33
PBGND
34
PBFIN2
35
VCT
36
PBREF
37
PBFIN1
38
PBGND
u163
39
PBRIN1
.
40
PBFB1
2 9
9 4
2 8
I/O
Function
O
Line output
-
Resistance for setting the
reference
1 5
0 5
8
2 9
9 4
-
Ground
I
TAPE input
O
Output reference
O
Playback equalizer amplifier
output
-
Playback equalizer amplifier
capacitance
I
Playback equalizer amplifier
feedback
I
Playback equalizer amplifier
input
-
Playback equalizer amplifier
ground
I
Playback equalizer amplifier
input
O
Center
O
Playback equalizer amplifier
reference
I
Playback equalizer amplifier
input
-
Playback equalizer amplifier
m
ground
co
I
Playback equalizer amplifier
input
I
Playback equalizer amplifier
feedback
9 9
2 8
9 9
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