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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 detection integrated circuits which select the program on the cassette tape. In the ordinal method, tape speed is different depending on the PLAY and FF/REW, and also nonsignal 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 corresponding 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.
2.40.25 3.30.25 6.00.3 9 8 0.50.1 7 23.30.3 6 5 4 1.50.25 3 2 1
0.1 0.3 + 0.05 -
Unit : mm
1.50.25 1.40.3
2.54
30
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 selected by external capacitor. * Detection level of input signal can be selected by external 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.
3.00.3
9-Lead SIP Package (SIP009-P-0000)
*
s Block Diagram
3
Input Circuit a SW 1-1 b Reset FF12 FF1 FF2 FF3 FF8 SW1-2 T a
to each block S - T FF Q 13 SW1-3 a a b a b SW1-4
Voltage Stabilizer
4
VCC
1 2
Amp.
Wave Form
P
9
OSC
b Differential Circuit
SW2 b
Output Circuit
6
7 8
Input Circuit Input Circuit
5 GND
AN6262N, AN6263N
s Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 Pin Name Signal Input Negative Feedback Pause Detection ON/OFF Input VCC GND Output Mode * Mode * Reference Oscillation
ICs for Cassette, Cassette Deck
*
Pin 7 L H L H
Pin 8 L L H H
Mode OFF FF/REW PLAY OFF
s Absolute Maximum Ratings (Ta=25C)
Parameter Supply Voltage Supply Current Power Dissipation Operating Ambient Temperature Storage Temperature ICC PD Symbol VCC AN6262N AN6263N AN6262N AN6263N Topr Tstg Rating 16 21 25 336 475 -25 ~ + 75 -55 ~ + 125 Unit V mA mA mW mW C C
s Electrical Characteristics (VCC=12V, Ta=25C)
Parameter 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 t-C Pin7 Pin8 Pin7 Pin8 Symbol I4 (OFF) fOSC V1 V3-5 I3 V7-5 V8-5 I7 I8 Condition V3=V7=V8=2V, V9=1V V1=0V, V3=V7=V8=0V f1=10kHz, V3=V7=2V, V8=0V I3= -100A, V7=V8=2V, V9=1V V3=0V, VCC=18V, V7=V8=2V, V9=1V V3=V8=2V, I7= -100A, V9=1V V3=V7=2V, I8= -100A, V9=1V V3=V8=2V, VCC=18V, V7=0V, V9=1V V3=V7=2V, VCC=18V, V8=0V, V9=1V AN6262N AN6263N min. 11.5 12.5 0.9 1.6 1.1 - 0.6 1.0 1.0 -1.2 -1.2 1.2 typ. max. 20 23 1.47 1.6 - 0.3 1.5 1.5 - 0.6 - 0.6 Unit mA mA kHz V mA V V mA mA
2.6 mVrms
10
3 Time of non-signal period t (s)
1
PL AY
uls e Ou tpu
W
0.03
0.01 0.001 0.003 0.01 0.03
FF
0.1
/R
0.1
tP
EW
idt
0.3
h
0.3
1
Oscillation Capacitance C (F)
ICs for Cassette, Cassette Deck
s Application Circuits
Program detecting circuit only at FF/REW mode. (1) When the plunger is ON between the program
AN6262N, AN6263N
22k R Ch. 1 L Ch. 22k 2 150k 3 220k VCC 22k 16V 47F + - 5 4 6 8 0.01F 47pF Search SW Open (ON) 7 (OFF) 9 0.027F
AN6262N
4.7k
(2) When the plunger is OFF between the program
10k R Ch. 0.022F 1 L Ch. 10k 2 150k Open 3 8 9 SW (ON) 0.047F
AN6263N
7 Open
Open (OFF)
VCC 16V 47F + - ON at only FF/REW
4
6
5
AN6262N, AN6263N
s Operational Description
(1) Between the program timing chart (PLAY Mode)
Music Pause between the music
ICs for Cassette, Cassette Deck
Music
Sound Signal
Sound Signal Pulse
Oscillation Signal Pulse
Reset 3712 Pulse Counter Input 256 Pulse 3712 Pulse 256 Pulse 3712 Pulse 256 Pulse
FF12
FF13
Output
(Output polarity is inverted in case of AN6263N)
(2) Explanation of PLAY mode (Referred to block diagram) 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 SW1 is all connected to a. 2) Mode is set (Pin7 "L", Pin8 "H"). 3) SW2 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 SW1- 4 is connected to a. 7) Furthermore sound pulse signal is input by 256, FF12 in inverted to "L" ( L ). When sound pulse signal is input by 3712+256 pulses, program is recognized. 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. Between the program is detected by counting oscillation pulse signal by 3712 pulses. When static capacitance of the external capacitor at Pin9 is set to 0.1F, 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.
ICs for Cassette, Cassette Deck
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.
1st music 5 sec. 3 sec. 2nd music Oscillation waveform Input waveform (Pin1)
AN6262N, AN6263N
tosc
3712 Pulse
PLAY mode output waveform (Pin6) FF/REW mode output waveform (Pin6)
tplay
tout
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.
tFF/REW
(Output polarity is inverted in case of AN6263N)
(3) FF/REW 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. VCC AN6262N AN6263N (6) Current driving capacitance of the output is minimum 100mA. 6 When relay is driven directly, equivalent load resistance is most suitable at 200. (AN6263N).
s Precautions on Use
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 t osc , 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 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.

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