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PDF AN6262N Data sheet ( Hoja de datos )
| Número de pieza | AN6262N | |
| Descripción | Pause Detection Circuits of Radio Cassette/ Cassette Deck | |
| Fabricantes | Panasonic Semiconductor | |
| Logotipo |  |
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ICs for Cassette, Cassette Deck
AN6262N, AN6263N
Pause Detection Circuits of Radio 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.
2.4±0.25
6.0±0.3 3.3±0.25
9
8
7
6
5
4
3
2
1
0.3
+
–
0.1
0.05
Unit : mm
30˚
3.0±0.3
9-Lead SIP Package (SIP009-P-0000)
s Block Diagram
3 Input
Circuit
to each block
Voltage
Stabilizer
1 Amp.
Wave
Form
P a SW1–1
b
S
T FF Q–
13
2
SW1–2 a
T
9 OSC
b
Reset
SW1–3
ab
a
SW2
a
b b SW1–4
Output
Circuit
7
Input
Circuit
8
Input
Circuit
Differential
Circuit
4 VCC
6
5 GND
1 page  
ICs for Cassette, Cassette Deck
AN6262N, AN6263N
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.
Oscillation
waveform
Input waveform
(Pin1)
tosc
3712 Pulse
5 sec.
1st music
2nd music
3 sec.
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.
PLAY mode
output waveform
(Pin6)
FF/REW mode
output waveform
(Pin6)
tplay tout
tFF/REW
(Output polarity is inverted in case of AN6263N)
(3) FF/REW
s Precautions on Use
Mode is set (Pin7 “H”, Pin8 “L”). Switch S2 is connected to Following items should be taken care in order to protect
b. destruction and keep reliability.
No signal detection time (0.1 seconds) is only different, 1. Please use it in the absolute maximum ratings. Take care
count number and pulse width of the sound pulse signal,
in case surge voltage shall be applied.
which acknowledges program, are the same, and operation is 2. Pins except Pin5 should be used in the range of
same, too.
positive voltage against Pin5.
3. Oscillation capacity should be used with superior thermal
(4) Neither PLAY nor FF/REW
characteristics.
When Pin7, 8 are “H”, “H” and “L” and “L”, between the 4. When plunger and relay are connected to the output
program detection is not performed even if between the program circuit, diode should be connected to the both side of
mode is ON.
coil in order to protect the IC against counter
electromotive force.
(5) Switching case of PLAY FF/REW
Always reset and initialized.
(6) Current driving capacitance of the output is minimum 100mA.
AN6262N
AN6263N
6
VCC
When relay is driven directly, equivalent load resistance is most
suitable at 200Ω. (AN6263N).
s How to determine oscillation capacitance
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 tosc,
Detection time of the PLAY mode : tplay=3712tosc
Detection time of the FF/REW mode : tFF/REW=128tosc
Output pulse width : tout =256tosc
Relation between oscillation cycle and oscillation capacitance is
tosc=8.64C (ms)
C : µF,
thus tplay, tFF/REW, tout becomes
tplay=32.07C (s)
tFF/REW=1105.9C (ms)
tout=2211.8C (ms) C : µF.
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet AN6262N.PDF ] | |
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