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LA72670BM Datasheet(PDF) 9 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.A0644-9/20
Continued from preceding page.
DC voltage
Pin
No.
Pin Function Name
AC level
Function
Equivalent circuit
17
REC mute terminal
DC; Unsettled
Two levels control terminal.
Hi ; 3.0V to Vcc
Low ; 0V to 1.5V
Hi: Pin 26 signal at REC is OFF(Mute).
1k
DC;
18
45
NR waiting DET
terminal(L)
NR waiting DET
terminal(R)
AC;
Terminal for waiting detector.
The recommended external capacity is 10
µF.
500
Ω 500Ω
DC; 2.5V
19
44
20
43
NR waiting filter
terminal1(L)
NR waiting filter
terminal1(R)
NR waiting filter
terminal2(L)
NR waiting filter
terminal2(R)
AC;
(Pin 19,Pin 44)between GND;4.7
µF
(Pin 20,Pin 43)between GND;0.01
µF
Pin19,44
22k
2.4k
Pin20,43
DC; 2.5V
Pin21
Pin41
21
22
42
41
CCA reference
terminal(L)
NR emphasis
terminal(L)
NR emphasis
terminal(R)
CCA reference
terminal(R)
AC;
By connecting 22µF between Pin 21, Pin 41
and GND, 4700pF between Pin 22, Pin 42
and GND, form the NR emphasis.
Pin22,42
12k
39k
Pin21,41
10k
10k
30k
DC ;Nor at 0.1V
;HiFi at
TRACKING
DC
23
HiFi/Nor selecting
terminal
(PB)
(2)Monitor control
terminal at Pin 34
(EE)
AC:
In PB mode, Pin 23 becomes
“TRACKING_DC” when inputting HiFi audio
signal and becomes “L” when inputting
Normal signal.
In EE mode, this is used as the terminal for
monitor control of Pin 34.
Low(0 to 0.8V) ; VCO MIX
Middle(1.4V to 3.6V) ; Lch VCO
High(4.2V to VCC) ; Rch VCO
5k
500
5E
Continued on next page.




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