LA72670BM datasheet(7/20 Pages) SANYO

Nome de Peças	LA72670BM

Descrição Electrónicos	US multiplex modulation for VCR HiFi Sound Signal Processor

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Fabricante Electrônico	SANYO [Sanyo Semicon Device]

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LA72670BM

No.A0644-7/20

Pin Description

DC voltage

No.

Pin Function Name

AC level

Function

Equivalent circuit

1

77

Line Mute terminal(L)

Line Mute terminal(R)

When the power supply VCC is on, the

switch of Pin 77 and Pin 1 is turned to ON to

reduce the line out noise.

In this case, it is necessary to apply 5 fixed

DC to Pin 5.

10

Ω

Pin77

Pin1

DC; 4.2V

2

Output terminal

for RF modulator

AC; -9.5dBV

Output terminal for RF modulator.

ALC level can be settled to -1dBV and -5dBV

by serial control.

300k

Ω

10k

Ω

MUTE

3

VCC 9V

Power supply of Line Out.

5

ALWAYS VCC

Power supply for the noise elimination mute

control when power is on.

15

VCC 5V(Lch)

5V power supply of Lch.

32

VCC 5V

5V power supply of HEAD AMP.

36

Power supply for Logic

Power supply for Logic.

46

VCC 5V(Rch)

5V power supply of Rch.

54

9V power supply for

MTS

9V power supply of MTS.

DC; 2.5V

4

NORMAL input

terminal

AC; -21.2dBV

NORMAL IC output signal is entered and

output to Line Out through output changeover.

G4D7/0:0dB

1:3dB

500

Ω

Vref

DC; 2.5V

6

NORMAL output

terminal

AC; -21.2dBv

This is connected to input of NORMAL

AUDIO IC.

200

Ω

DC ; 0V

7

9

11

69

71

73

Audio input terminal

EXT1_IN(L)

EXT2_IN(L)

EXT3_IN(L)

EXT1_IN(R)

EXT2_IN(R)

EXT3_IN(R)

AC; -28.2dBV

Audio input terminal.

500

Ω

Continued on next page.

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