CXA2557 Ver la hoja de datos (PDF) - Sony Semiconductor

Número de pieza

componentes Descripción

Fabricante

CXA2557

RF Amplifier for CD Player/CD-ROM

Sony Semiconductor 

CXA2557R

Pin

No.

Symbol

I/O

Equivalent circuit

41 VCA

I

41

80k

40k 26.7k

Description

80k RF DC and RF AC amplifier

gain adjustment input.

AGC circuit target voltage input

80k when AGC SW is ON.

40k

42

BST

CNT

I

20k

42

Equalizer circuit boost amount

adjustment input.

43

FC H

CNT

I

20k

43

20k

44

FC CNT

1

I

5k

15k

5k

5k

124

44

45

FE CNT

2

I

5k

15k

5k

5k

124

45

Cut-off frequency N adjustment

input when Pin 34 is High.

Connects the external resistor

that sets cut-off frequency n

when Pin 34 is Low or Medium.

Connects the external resistor

that sets cut-off frequency N

when Pin 34 is High.

46

46 HOLD C I

Connects the capacitor that

sets AGC time constant.

– 10 –

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