3

Video ICs

BA7796FS

I / O circuit

1

2.0V

REC: 120k

Ω

REC: 11

Ω

2

0.0V

3

0.0V

REC: OPEN

4

5.7V

EF (P - P)

5

5.7V

6

5.7V

7

—

12.0V

—

9

12.0V

10k

10

—

11

5.7V

12

GND

0.0V

—

13

—

14

5.6V

120k

Ω

15

—

16

5.6V

120k

Ω

17

—

18

5.6V

120k

Ω

19

PB: 0.0V

PB: not fixed

20

5.6V

120k

Ω

21

2.0V

22

2.0V

23

2.0V

24

0.0V

—

Pin No.

HEAD EQ SW

PB IN

REC HEAD SW

REC OUT

REC L 2

REC L 1

EQ CTRL

RIPPLE FILTER

REC / EE CTRL

LINE OUT

MUTE CTRL

LINE IN2

PB / EE CTRL

LINE IN1

INPUT SW CTRL

TUNER IN

ALC FILTER

PB LINE IN

PB EQ SW

PB OUT

PB NFB

HEAD GND

EF (P - P)

EF (P - P)

B (NPN)

B (NPN)

REC: 11

Ω (ON)

220k

Ω / 20Ω (ON)

EF (NPN) ~ 100

Ω

35

Ω (ON) / OPEN

19

Ω (ON) / OPEN

Pin voltage

Pin name

Function

See input / output circuit

See input / output circuit

See input / output circuit

See input / output circuit

See input / output circuit

Playback amplifier input / playback head switch

Head resonance capacitor switch

High-withstanding voltage recording head switch

Recording amplifier output

Recording EQ switch

Recording EQ pin

EQ control

Ripple filter

REC / EE control

Line amplifier output

GND

Mute control

Line input 2

PB / EE control

Line input 1

Input switch control

Tuner input

For setting the time constant for the ALC filter

(attack and recovery times)

Line input for playback

Playback amplifier output

Playback equalizer switch

Playback amplifier feedback

GND for playback amplifier and head switch

All numerical values are standardized values.