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LA72670BM Datasheet(PDF) 10 Page - Sanyo Semicon Device

Part No. LA72670BM
Description  US multiplex modulation for VCR HiFi Sound Signal Processor
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Maker  SANYO [Sanyo Semicon Device]
Homepage  http://www.ssdc-jp.com/eng/
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LA72670BM
No.A0644-10/20
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
It becomes HEAD AMP input in PB mode.
Hch is Pin24, and Lch is Pin 27.
And, it becomes supply source of REC
current in REC mode.
REC-
ON
PB-ON
DC; 4.1V
26
REC CURRENT AMP
output terminal
AC; 2.1Vp-p
CURRENT AMP output in REC mode.
Common input terminal in PB mode.
VCC5V
REC-ON
PB-ON
DC; 2.4V
28
CURRENT AMP
ADJUST terminal
AC:1.3Vp-p
(L/R_MIX)
Terminal for adjusting the recording current.
400
Pin28
29
SAP detection terminal
DC ;
Filter terminal in the SPA detector circuit.
1k
2k
30
HiFi/NORMAL
detection terminal
DC:
Nor; 2.5V or
more
HiFi; 2.2V or
less
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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