LA1781M Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Lista de partido

LA1781M

For Car Radios Single-Chip Tuner IC

SANYO -> Panasonic 

Pin Descriptions

Pin No.

1

Pin function

Antenna damping drive

LA1781M

Pin description

An antenna damping current flows

when the RF AGC voltage (pin 2)

ANT

reaches VCC - VD.

Equivalent circuit

VCC

Pin 62

RF

AGC

1000pF

100Ω

1

1000pF

300Ω

100Ω

2

RF AGC

3

F.E.GND

4

OSC

7

AM OSC

Used to control the FET

VCC

second gate.

FET

12kΩ

2ND GATE

2

+

N

AGC

DET

KEYED

AGC

ANT

DAMPING

DRIVER

W

AGC

DET

VCC

Oscillator connection.

The transistor and capacitors

required for the oscillator circuit are

integrated on the chip.

VT

AM first oscillator.

This circuit can oscillator up to the

SW band.

An ALC circuit is included.

VCC

4

25pF

2kΩ

20pF

7

VCC

ALC

Continued on next page.

No.6038-6/48

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