LA7289 データシートの表示（PDF） - SANYO -> Panasonic

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LA7289

VCR Audio Signal Record and Playback Processor

SANYO -> Panasonic 

Continued from the preceding page.

Pin No.

18

Function

Muting control

19

Record/EE control

20

Power supply (VCC)

21

Ripple filter

22

Record amplifier output

LA7289

Function description

When the pin 18 voltage is:

3.6 to 6.0 V: Muting will be on.

0.0 to 1.5 V: Muting will be off.

When the pin 19 voltage is:

3.0 to 6.0 V: Record mode

0.0 to 1.0 V: EE mode

VCC max = 14 V

VCC = 8.5 V to 12.5 V

Connect an electrolytic capacitor between

this pin and ground to remove ripple

from the power supply.

Output impedance → 50 Ω (typical)

Internal circuit

A06836

A06837

Power supply

for all circuit

blocks

A06838

23

Record bias automatic control input

and playback switch

EE and playback modes → On

Record mode → Off

On resistance → 20 Ω (typical)

24

EQ switch 2

This pin switches the high-band peaking

frequency in record and playback modes.

REC PB

EP On On

LP On Off

SP Off Off

On resistance: 30 Ω (typical)

A06839

A06840

A06841

No. 5642-10/11

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