ICs for Cassette, Cassette Deck
s
Overview
The AN6262N and the AN6263N are the pause detec-
tion integrated circuits which select the program on the
cassette tape. In the ordinal method, tape speed is differ-
ent depending on the PLAY and FF/REW, and also non-
signal time between the programs is different. Therefore,
two time constant circuit has been applied in order to
detect each time. The AN6262N and the AN6263N are
proud of detecting the program by making the time corre-
sponding to each non signal time logically in the one time
constant circuit. Furthermore, signal can be detected in
this time constant circuit and beginning of the program is
recognized when sound signal pulse increase more than
specified numbers.
s
Features
Built-in protection circuit to prevent mis-operation when
power switch is turned ON.
Time-constant circuit for detection of no-signal period
in PLAY and FF/REW.
No-signal period and output pulse width can be select-
ed by external capacitor.
Detection level of input signal can be selected by exter-
nal resistor.
As the ON/OFF input for mode setting and pause
detection, both TTL level and power source level can
be used.
Very few external components needed.
AN6262N, AN6263N
Pause Detection Circuits of Radio Cassette, Cassette Deck
9
8
7
6
5
4
3
2
0.3
+ 0.1
0.05
23.3
0.3
6.0
0.3
2.4
0.25
3.3
0.25
1.5
0.25
0.5
0.1
2.54
1.5
0.25
1.4
0.3
3.0
0.3
Unit : mm
30
1
9-Lead SIP Package (SIP009-P-0000)
3
V
CC
GND
1
2
9
7
8
6
5
4
Amp.
Input
Circuit
OSC
Input
Circuit
Input
Circuit
Differential
Circuit
Wave
Form
Voltage
Stabilizer
Output
Circuit
FF
13
FF1
FF2
FF8
FF3
FF12
SW
12
T
b
a
b
P
SW
11
a
a
a
SW
2
b
b
SW
13
b SW
14
a
S
Q
T
Reset
to each block
s
Block Diagram
ICs for Cassette, Cassette Deck
AN6262N, AN6263N
*
OFF
FF/REW
PLAY
OFF
Pin No.
Pin Name
1
2
3
4
5
6
7
8
9
Signal Input
Negative Feedback
Pause Detection ON/OFF Input
V
CC
GND
Output
Mode
*
Mode
*
Reference Oscillation
s
Pin Descriptions
Pin 7
L
H
L
H
Pin 8
L
L
H
H
Mode
16
21
25
336
475
25 ~ + 75
55 ~ + 125
V
CC
Supply Voltage
Supply Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
V
mA
mA
mW
mW
C
C
Parameter
Unit
s
Absolute Maximum Ratings
(Ta=25C)
AN6262N
AN6263N
AN6262N
AN6263N
I
CC
P
D
T
opr
T
stg
Symbol
Rating
Parameter
Symbol
Condition
min.
typ.
max.
Unit
s
Electrical Characteristics
(V
CC
=12V, Ta=25C)
Supply Current (Output OFF)
Oscillation Frequency
Signal Detection Level
Pause Detection ON/OFF Level
Pause Detection OFF Outcoming Current
Mode Switching
Level
Mode Switching Circuit
Outgoing Current
V
3
=V
7
=V
8
=2V,
V
9
=1V
V
1
=0V, V
3
=V
7
=V
8
=0V
f
1
=10kHz, V
3
=V
7
=2V, V
8
=0V
I
3
= 100
A, V
7
=V
8
=2V, V
9
=1V
V
3
=0V, V
CC
=18V, V
7
=V
8
=2V, V
9
=1V
V
3
=V
8
=2V, I
7
= 100
A, V
9
=1V
V
3
=V
7
=2V, I
8
= 100
A, V
9
=1V
V
3
=V
8
=2V, V
CC
=18V, V
7
=0V, V
9
=1V
V
3
=V
7
=2V, V
CC
=18V, V
8
=0V, V
9
=1V
I
4 (OFF)
f
OSC
V
1
V
35
I
3
V
75
V
85
I
7
I
8
Pin7
Pin8
Pin7
Pin8
AN6262N
AN6263N
11.5
12.5
0.9
1.6
1.1
0.6
1.0
1.0
1.2
1.2
1.2
20
23
1.47
2.6
1.6
0.3
1.5
1.5
0.6
0.6
mA
mA
kHz
mVrms
V
mA
V
V
mA
mA
t C
0.01
0.001
0.3
1
3
10
0.003
Oscillation Capacitance C (
F)
T
i
m
e
o
f
n
o
n
-
s
i
g
n
a
l
p
e
r
i
o
d
t
(
s
)
0.1
0.03
0.01 0.03
0.1
0.3
1
FF
/R
E
W
PL
A
Y
O
ut
pu
t P
ul
se
W
id
th
ICs for Cassette, Cassette Deck
AN6262N, AN6263N
V
CC
(OFF)
1
2
3
4
9
8
7
6
5
+
Open (ON)
Search SW
R Ch.
L Ch.
AN6262N
0.027
F
150k
47pF
0.01
F
22k
220k
22k
16V
47
F
22k
4.7k
1
2
3
4
9
8
7
6
5
SW (ON)
R Ch.
L Ch.
AN6263N
0.047
F
150k
0.022
F
10k
10k
Open
(OFF)
Open
Open
+
16V
47
F
V
CC
ON at only
FF/REW
Program detecting circuit only at FF/REW mode.
(1) When the plunger is ON between the program
(2) When the plunger is OFF between the program
s
Application Circuits
ICs for Cassette, Cassette Deck
AN6262N, AN6263N
1) When supply voltage is turned ON and Pin3 is set to "H"
(between the program detection ON), FF1-FF12 are reset and
FF13 is set, Switch SW
1
is all connected to a.
2) Mode is set (Pin7 "L", Pin8 "H").
3) SW
2
is connected to a.
4 ) Sound signal input to P i n 1 becomes pulse after wave
shaped.
5) This sound pulse signal is input to the counter via
SW
1-2
.
6) Sound pulse signal is input to the counter by 3712
pulses, FF12 is inverted to "H" (
L
H
). But no output is
obtained as the SW
1 4
is connected to a.
7) Furthermore sound pulse signal is input by 256, FF12 in
inverted to "L" (
L
).
8) When FF12 is inverted from "H" to "L", FF13 is inverted.
When FF13 is inverted, SW
1
is all connected to b.
9) Sound pulse signal, oscillation from oscillator and output of
FF12 are connected to reset pin of the counter, input of the
counter and output circuit, respectively.
10) Counter will count oscillation pulse signal and is reset by
the "H" of sound pulse signal (Program is there).
11) When sound pulse signal is stayed at "L" (program ends),
reset is released. Counter begins to count oscillation pulse
signal and FF12 is inverted to "H" by 3712 pulses.
When static capacitance of the external capacitor at Pin9 is
set to 0.1
F, between the program is detected when no
signal time is more than 3 seconds.
12) Oscillation pulse signal is input furthermore by
256 pulses, FF12 is inverted ("H" "L"), FF13 is
also inverted and SW
1
is all connected to a.
13) Returns to 5) mode. Input pulse signal is counted by more
than 3712 + 256 pulses, program is recognized.
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Operational Description
Sound Signal
Pulse
(1) Between the program timing chart (PLAY Mode)
Music
Music
Pause between the music
(Output polarity is inverted in case of AN6263N)
When sound pulse signal is input by 3712+256
pulses, program is recognized.
Between the program is detected by counting
oscillation pulse signal by 3712 pulses.
3712 Pulse
256 Pulse
3712 Pulse
256 Pulse
3712 Pulse
256 Pulse
(2) Explanation of PLAY mode (Referred to block diagram)
Sound Signal
Reset
Counter Input
FF12
FF13
Output
Oscillation
Signal Pulse
ICs for Cassette, Cassette Deck
AN6262N, AN6263N
1st music
2nd music
5 sec.
3 sec.
After that, no signal time (more than 3 seconds) comes, between
the program is recognized and output pulse is generated.
If no signal time is less than 3 seconds, it is recognized not
between the program, but program.
Even if noise is contained before more than 3 seconds of 1st
music, between 1st music and 2nd music is detected.
When count of input pulse signal is by less than 3712, it is
recognized as no signal time. So noise is not recognized as
program. Detection of between noise and 1st music is never done.
(3) FF/REW
Mode is set (Pin7 "H", Pin8 "L"). Switch S
2
is connected to
b.
No signal detection time (0.1 seconds) is only different,
count number and pulse width of the sound pulse signal,
which acknowledges program, are the same, and operation is
same, too.
(
4) Neither PLAY nor FF/REW
When Pin7, 8 are "H", "H" and "L" and "L", between the
program detection is not performed even if between the program
mode is ON.
(5) Switching case of PLAY FF/REW
Always reset and initialized.
(
6)
Current driving capacitance of the output is minimum 100mA.
When relay is driven directly, equivalent load resistance is most
suitable at 200
. (AN6263N).
No signal detection time of PLAY, FF/REW and time of
output pulse width is determined by the relation between
oscillation cycle determined by the oscillation capacitance and
construction stage number of the flip-flop. When oscillation
period is t
osc
,
Detection time of the PLAY mode : t
play
=3712t
osc
Detection time of the FF/REW mode : t
FF/REW
=128t
osc
Output pulse width : t
out
=256t
osc
Relation between oscillation cycle and oscillation capacitance is
t
osc
=8.64C (ms)
C :
F,
thus t
play
, t
FF/REW
, t
out
becomes
t
play
=32.07C (s)
t
FF/REW
=1105.9C (ms)
t
out
=2211.8C (ms)
C :
F.
s
How to determine oscillation capacitance
t
osc
3712 Pulse
t
play
t
out
t
FF/REW
Oscillation
waveform
Input waveform
(Pin1)
PLAY mode
output waveform
(Pin6)
FF/REW mode
output waveform
(Pin6)
(Output polarity is inverted in case of AN6263N)
AN6262N
AN6263N
6
Following items should be taken care in order to protect
destruction and keep reliability.
1. Please use it in the absolute maximum ratings. Take care
in case surge voltage shall be applied.
2. Pins except Pin5 should be used in the range of
positive voltage against Pin5.
3. Oscillation capacity should be used with superior thermal
characteristics.
4. When plunger and relay are connected to the output
circuit, diode should be connected to the both side of
coil in order to protect the IC against counter
electromotive force.
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Precautions on Use
V
CC
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