ICs for Cassette, Cassette Deck
s
Overview
The AN7351K and the AN7351SC are the single chip
ICs designed for pre-amp. for stereo cassette (double
deck especially) incorporating 2-ch rec./playback/line
amp. and muting/switching circuits.
s
Features
Available for double deck
1. Available for playback amp. tape speed switching
2. Available for rec. amp. mute function
3. Available for playback amp. input and output switch-
ing function
Rec. amp. current and voltage both drive output is pos-
sible.
Line amp. + mute circuit built-in
Playback equalizer switching built-in
Available for microcomputer direct drive of switching
control pin
AN7351K, AN7351SC
Dual Pre-Amplifier ICs for Hi-Fi Cassette Deck
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
36.8
0.3
0.9
0.25
3 ~ 15
Unit : mm
13.7
0.3
0.5
0.1
1.778
4.76
0.25
3.3
0.25
15.3
0.25
0.3
+ 0.1
0.05
0.96
0.25
AN7351K
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
42-Lead SDIP Package (SDIP042-P-0600A)
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
V
CC
+V
CC
NC
GND
1
2
SW
T
1
T
2
SW
120/70
SW
Line
P B
Mute
CUE
Rev.
Mute
REC.
Mute
REC.
REC.
Ch.2
Ch.1
Ch.2
Ch.2
Ch.1
Ch.1
P B
s
Block Diagram
0.45
0.35
0.1
1.0
0.1
0.1
0.3
2.0
0.2
0.9
0.15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
9.5
0.3
11.5
0.3
Unit : mm
21.25
0.3
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
AN7351SC
42-Lead SOP Package (SSOP042-P-0450)
ICs for Cassette, Cassette Deck
AN7351K, AN7351SC
s
Absolute Maximum Ratings
(Ta=25C)
V
CC
I
CC
P
D
T
opr
T
stg
Supply Voltage
Supply Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
V
mA
mW
C
C
Parameter
Symbol
Rating
Unit
7.2
39
1014 *
787 *
20 ~ + 75
50 ~ + 150
55 ~ + 125
AN7351K
AN7351SC
AN7351K
AN7351SC
*
AN7351K : R
th (ja)
=123.3C/W, AN7351SC : R
th (ja)
=127C/W
Parameter
Symbol
Range
Operating Supply Voltage Range
V
CC
4.5V ~
7V
s
Recommended Operating Range
(Ta= 25C)
V
i
=3.6mV
Speed
1 Feedback Time Constant 120
s
V
i
=3.6mV
Speed
1 Feedback Time Constant 70
s
V
i
=3.6mV
Speed
2 Feedback Time Constant 120
s
V
i
=3.6mV
Speed
2 Feedback Time Constant 70
s
R
g
=2.2k
, DIN/AUDIO,
Speed
1 Feedback Time Constant 120
s
R
g
=2.2k
, DIN/AUDIO,
Speed
1 Feedback Time Constant 120
s
R
g
=2.2k
, DIN/AUDIO,
Speed
1 Feedback Time Constant 120
s
R
g
=2.2k
, DIN/AUDIO,
Speed
1 Feedback Time Constant 120
s
V
i
=3.6mV
V
i
=3.6mV
THD
=3%
THD
=3%
R
g
=220
R
g
=220
V
i
=3.6mV
V
i
=3.6mV
V
i
=200mV
V
i
=30mV
THD
=3%, R
L
=10
THD
=3%, R
L
=1
V
i
=200mV
R
g
=2.2k
, DIN/AUDIO
R
g
=2.2K
R
g
=5K
0.9
0.9
60
60
3
3
70
70
60
60
2.2
1
75
9
25
Parameter
Symbol
Condition
min.
typ.
max.
Unit
s
Electrical Characteristics
(V
CC
=
6V, f=1kHz, Ta=25C)
0.1
0.1
0.1
0.1
1.5
1.5
9
9
70
70
0.1
0.2
1
9
25
0.04
0.04
0.04
0.04
0.7
0.7
3.4
3.4
0.03
0.03
3.2
1.5
0.03
Total Harmonic Distortion (1) Tape 1
Total Harmonic Distortion (2) Tape 1
Total Harmonic Distortion (3) Tape 2
Total Harmonic Distortion (4) Tape 2
Output Noise Voltage Tape 1
Output Noise Voltage Tape 2
Pulse Noise Voltage Tape 1
Pulse Noise Voltage Tape 2
Muting Attenuation Tape 1
Muting Attenuation Tape 2
Max. Output Voltage Tape 1
Max. Output Voltage Tape 2
Output Offset Voltage Tape 1
Output Offset Voltage Tape 2
Crosstalk Tape 1
Tape 2
Crosstalk Tape 2
Tape 1
Total Harmonic Distortion VOL
Total Harmonic Distortion CUR
Max. Output Voltage VOL
Max. Output Voltage CUR
Muting Attenuation VOL
Output Noise Voltage CUR
Pulse Noise Voltage CUR
Output Offset Current CUR
THD
(P1)
THD
(P2)
THD
(P3)
THD
(P4)
V
N (T1)
V
N (T2)
V
PN (T1)
V
PN (T2)
R
M (T1)
R
M (T2)
V
O (T1)
V
O (T2)
V
DC (T1)
V
DC (T2)
CT
(T1)
CT
(T2)
THD
(RV)
THD
(RC)
V
O (RV)
V
O (RC)
R
M (RV)
V
N (RC)
V
PN (RC)
I
DC (RC)
%
%
%
%
mV
mV
mV
P O
mV
P O
dB
dB
V
V
mV
mV
dB
dB
%
%
V
V
dB
mV
mV
P O
A
<Playback Amp.> R
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