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LA72680M Datasheet(PDF) 10 Page - Sanyo Semicon Device

Part No. LA72680M
Description  JAPAN TV Sound Multiplex Demodulation HiFi Sound Signal Processor
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Maker  SANYO [Sanyo Semicon Device]
Homepage  http://www.ssdc-jp.com/eng/
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LA72680M
No.7955-10/21
Continued from preceding page.
DC voltage
Pin
No.
Pin Function Name
AC level
Function
Equivalent circuit
24
27
HEAD AMP input
terminal
(Hch)
HEAD AMP input
terminal
(Lch)
DC
PB; 2.0V
REC; 4.1V
HEAD AMP inputs (CH1 and CH2) is PB
mode.
REC-
ON
PB-ON
26
REC CURRENT AMP
output terminal
CURRENT AMP output in REC mode.
Common input terminal in PB mode.
VCC5V
REC-ON
PB-ON
28
CURRENT AMP
ADJUST terminal
DC; 2.4V
Terminal for adjusting the recording current.
400
Pin28
29
ALC detection terminal
This is ALC detector terminal.
ALC becomes through switch when Pin29
pull up VCC.
1k
2k
30
HiFi/NORMAL
detection terminal
This terminal is for detecting
demodulation noise and output which has
passed through the primary
HPF(fc=140kHz).
200
Pin30
Continued on next page.




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