CXA1878Q datasheet(8/36 Pages) SONY

Part #	CXA1878Q

Description	Dolby B-C Type Noise Reduction System with Recording/Playback Equalizer Amplifier

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Manufacturer	SONY [Sony Corporation]

Direct Link	http://www.sony.co.jp

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CXA1878Q

25

26

27

28

29

DECK A/B

METER1

METER2

REC VOL

REC BAL

—

1.6V

—

2.5V

when

open

—

–1.1dBv

—

I

O

I

—

100k

Ω

100k

Ω

Playback deck A/B

select control

∗ Playback equalizer

amplifier input

selection

High: PB INB

Low : PB INA

Level meter amplifier

output

Recording volume level

control

High: Output signal

level increased

Low : Output signal

level reduced

Recording volume

balance control

High : Only VOL OUT2

output level

reduced

Low : Only VOL OUT1

output level

reduced

∗ Neither VOL OUT1

nor 2 output levels are

attenuated at the

control voltage of 2.5V.

30

DGND

0.0V

Connect to GND.

10k

DGND

25

27

60k

10k

26

60k

40k

28

GND

70k

8k

29

8k

21k

30k

DVCC/2

DC

AC

No.

Symbol

I/O

Z (in)

Equivalent circuit

Description

Typical pin voltage

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CXA1878Q Datasheet(PDF) 8 Page - Sony Corporation

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