1995 May 23

21

Philips Semiconductors

Preliminary specification

TV and VTR stereo/dual sound processor

with digital identification

TDA9847

Fig.11 Application circuit for the stereo decoder TDA9847 in conjunction with a microcontroller

(LOW/HIGH with open-drain output ports).

Resistors RC4A and RC4B

±2%; all other resistors ±10%; transistors BC types or equivalent.

MICROCONTROLLER

STEREO

DECODER

RC1

10 k

Ω

RC2

10 k

Ω

RC42A

10 k

Ω

RC4A

11 k

Ω

RC41A

10 k

Ω R

C41B

RC42B

RC3

10 k

Ω

RC4B

6.2 k

Ω

100 k

Ω

100 k

Ω

C41

C42

TDA9847

3

1

2

24

20

22

VP = 5 V ±10%

VP = 4.5 to 8.8 V

C1

C2

C3

C4

MED812